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-rw-r--r--third_party/rust/syn/.cargo-checksum.json1
-rw-r--r--third_party/rust/syn/Cargo.toml147
-rw-r--r--third_party/rust/syn/LICENSE-APACHE201
-rw-r--r--third_party/rust/syn/LICENSE-MIT23
-rw-r--r--third_party/rust/syn/README.md285
-rw-r--r--third_party/rust/syn/benches/file.rs55
-rw-r--r--third_party/rust/syn/benches/rust.rs170
-rw-r--r--third_party/rust/syn/build.rs51
-rw-r--r--third_party/rust/syn/src/attr.rs662
-rw-r--r--third_party/rust/syn/src/await.rs2
-rw-r--r--third_party/rust/syn/src/bigint.rs66
-rw-r--r--third_party/rust/syn/src/buffer.rs398
-rw-r--r--third_party/rust/syn/src/custom_keyword.rs253
-rw-r--r--third_party/rust/syn/src/custom_punctuation.rs300
-rw-r--r--third_party/rust/syn/src/data.rs493
-rw-r--r--third_party/rust/syn/src/derive.rs274
-rw-r--r--third_party/rust/syn/src/discouraged.rs194
-rw-r--r--third_party/rust/syn/src/drops.rs58
-rw-r--r--third_party/rust/syn/src/error.rs428
-rw-r--r--third_party/rust/syn/src/export.rs39
-rw-r--r--third_party/rust/syn/src/expr.rs3558
-rw-r--r--third_party/rust/syn/src/ext.rs139
-rw-r--r--third_party/rust/syn/src/file.rs125
-rw-r--r--third_party/rust/syn/src/gen/clone.rs2241
-rw-r--r--third_party/rust/syn/src/gen/debug.rs3042
-rw-r--r--third_party/rust/syn/src/gen/eq.rs2195
-rw-r--r--third_party/rust/syn/src/gen/fold.rs3341
-rw-r--r--third_party/rust/syn/src/gen/hash.rs2869
-rw-r--r--third_party/rust/syn/src/gen/visit.rs3786
-rw-r--r--third_party/rust/syn/src/gen/visit_mut.rs3786
-rw-r--r--third_party/rust/syn/src/gen_helper.rs154
-rw-r--r--third_party/rust/syn/src/generics.rs1362
-rw-r--r--third_party/rust/syn/src/group.rs282
-rw-r--r--third_party/rust/syn/src/ident.rs101
-rw-r--r--third_party/rust/syn/src/item.rs3313
-rw-r--r--third_party/rust/syn/src/lib.rs984
-rw-r--r--third_party/rust/syn/src/lifetime.rs154
-rw-r--r--third_party/rust/syn/src/lit.rs1600
-rw-r--r--third_party/rust/syn/src/lookahead.rs169
-rw-r--r--third_party/rust/syn/src/mac.rs219
-rw-r--r--third_party/rust/syn/src/macros.rs177
-rw-r--r--third_party/rust/syn/src/op.rs234
-rw-r--r--third_party/rust/syn/src/parse.rs1314
-rw-r--r--third_party/rust/syn/src/parse_macro_input.rs179
-rw-r--r--third_party/rust/syn/src/parse_quote.rs167
-rw-r--r--third_party/rust/syn/src/pat.rs927
-rw-r--r--third_party/rust/syn/src/path.rs854
-rw-r--r--third_party/rust/syn/src/print.rs16
-rw-r--r--third_party/rust/syn/src/punctuated.rs1087
-rw-r--r--third_party/rust/syn/src/reserved.rs44
-rw-r--r--third_party/rust/syn/src/sealed.rs4
-rw-r--r--third_party/rust/syn/src/span.rs67
-rw-r--r--third_party/rust/syn/src/spanned.rs114
-rw-r--r--third_party/rust/syn/src/stmt.rs349
-rw-r--r--third_party/rust/syn/src/thread.rs41
-rw-r--r--third_party/rust/syn/src/token.rs1013
-rw-r--r--third_party/rust/syn/src/tt.rs107
-rw-r--r--third_party/rust/syn/src/ty.rs1304
-rw-r--r--third_party/rust/syn/src/verbatim.rs33
-rw-r--r--third_party/rust/syn/src/whitespace.rs65
-rw-r--r--third_party/rust/syn/tests/common/eq.rs806
-rw-r--r--third_party/rust/syn/tests/common/mod.rs28
-rw-r--r--third_party/rust/syn/tests/common/parse.rs48
-rw-r--r--third_party/rust/syn/tests/debug/gen.rs5640
-rw-r--r--third_party/rust/syn/tests/debug/mod.rs125
-rw-r--r--third_party/rust/syn/tests/macros/mod.rs79
-rw-r--r--third_party/rust/syn/tests/regression.rs3
-rw-r--r--third_party/rust/syn/tests/regression/issue1108.rs5
-rw-r--r--third_party/rust/syn/tests/regression/issue1235.rs32
-rw-r--r--third_party/rust/syn/tests/repo/mod.rs215
-rw-r--r--third_party/rust/syn/tests/repo/progress.rs37
-rw-r--r--third_party/rust/syn/tests/test_asyncness.rs37
-rw-r--r--third_party/rust/syn/tests/test_attribute.rs336
-rw-r--r--third_party/rust/syn/tests/test_derive_input.rs894
-rw-r--r--third_party/rust/syn/tests/test_expr.rs306
-rw-r--r--third_party/rust/syn/tests/test_generics.rs285
-rw-r--r--third_party/rust/syn/tests/test_grouping.rs52
-rw-r--r--third_party/rust/syn/tests/test_ident.rs85
-rw-r--r--third_party/rust/syn/tests/test_item.rs336
-rw-r--r--third_party/rust/syn/tests/test_iterators.rs68
-rw-r--r--third_party/rust/syn/tests/test_lit.rs266
-rw-r--r--third_party/rust/syn/tests/test_meta.rs378
-rw-r--r--third_party/rust/syn/tests/test_parse_buffer.rs92
-rw-r--r--third_party/rust/syn/tests/test_parse_stream.rs12
-rw-r--r--third_party/rust/syn/tests/test_pat.rs67
-rw-r--r--third_party/rust/syn/tests/test_path.rs126
-rw-r--r--third_party/rust/syn/tests/test_precedence.rs460
-rw-r--r--third_party/rust/syn/tests/test_receiver.rs127
-rw-r--r--third_party/rust/syn/tests/test_round_trip.rs241
-rw-r--r--third_party/rust/syn/tests/test_shebang.rs59
-rw-r--r--third_party/rust/syn/tests/test_should_parse.rs45
-rw-r--r--third_party/rust/syn/tests/test_size.rs29
-rw-r--r--third_party/rust/syn/tests/test_stmt.rs93
-rw-r--r--third_party/rust/syn/tests/test_token_trees.rs30
-rw-r--r--third_party/rust/syn/tests/test_ty.rs352
-rw-r--r--third_party/rust/syn/tests/test_visibility.rs148
-rw-r--r--third_party/rust/syn/tests/zzz_stable.rs33
97 files changed, 57591 insertions, 0 deletions
diff --git a/third_party/rust/syn/.cargo-checksum.json b/third_party/rust/syn/.cargo-checksum.json
new file mode 100644
index 0000000000..edd04e5cd1
--- /dev/null
+++ b/third_party/rust/syn/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"1ff565970239963d56cbfdd20476fd265fcf2d050fc5ed92a298686321985230","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"23f18e03dc49df91622fe2a76176497404e46ced8a715d9d2b67a7446571cca3","README.md":"ea9f2b6340b302b5608d2bedcda7e2d707f3eaebf4cc983c02d55071ead7096f","benches/file.rs":"3d737ef3878f6e242b003af9bd539e565f98439a12ee44d9548d84e3fdd7af0c","benches/rust.rs":"11ac9fe898a7bf1bd63e8a8cc9c08bd795b01f0248215cff99afaaf28ce87fab","build.rs":"b815649fd2929d3debd93a58f5da2fb8eba506047a6a5ba538347305828a87b0","src/attr.rs":"234d9cebe2c5e92cd0f5e1117bf5755037e2e905788a337000a65d4bd82b63aa","src/await.rs":"8aa22e3c201cb2bdb6b4817fa00901f308ab06817607aa7b884c58c957705969","src/bigint.rs":"efc7f64959980653d73fe4f8bc2a3a2904dc05f45b02c6dc15cd316fa3d7c338","src/buffer.rs":"4d15f35273d485261be4f1a765ae03abc1daee9fc9dac5fb4f9b624d6b22cb58","src/custom_keyword.rs":"5c706fc3611e73d16b8c019d7ecb848a86b1ccfcd9e556f80bb6e6a4abe058a8","src/custom_punctuation.rs":"8a666298e774b0d326642f0f73284f6677d0d0a7c9e4a712c9c98d010b4d8a2c","src/data.rs":"75d2c2b5d6a01bf8a6fa2845e41663d8045a78b4b191f1a1bd7c93619d20017a","src/derive.rs":"ee24a202be2d36ccdff576dd9cd765e94b33ef2286946e6725d75b08e777d462","src/discouraged.rs":"6c6a9298f8d24f578da119557bc588f3bd928f7b79fca27d6bdfe3e786dd005f","src/drops.rs":"013385f1dd95663f1afab41abc1e2eea04181998644828935ca564c74d6462ae","src/error.rs":"b30e738fdab7d10e126350e09f7ad907bf4dc14e684b9ed9eeea001c7ee356e0","src/export.rs":"0cf50d70c32d5fddba8b1193032df62e560237c113df3e86ba26b565cc82838e","src/expr.rs":"5eea3828f3291b0ce5463ed5f0c23fc8a39aeceae68a3247ae02ae467dd35a98","src/ext.rs":"1f648cff1d705a1cea64b32b77482b97a82d2fe0aaf63b40cade91e5c02dc969","src/file.rs":"f86697655222ae294215114f4eae8e6b0b5e2a935d6c479ff8f8f889c4efd2e2","src/gen/clone.rs":"76e89fe155fedf43bc4a252af7e35319b82ce455f584bad8698fdc3f9b7f5d4e","src/gen/debug.rs":"4b05e474e864ce6bf1a5a6ab48ee6c0ecdf41a0d750237990cf2e31963bc1208","src/gen/eq.rs":"79f84836fdcd5cfa352f38055dab7c3246c7757650946c1c701234b11021652a","src/gen/fold.rs":"fcd6a05c8c8e0c36e7ede8593002528b553c8b648fbed452106fd6a8a8c9212a","src/gen/hash.rs":"575e8beae303c1eabda12bf76cbd82672268c502a8ebb8517aab18b40fdbc44e","src/gen/visit.rs":"ced9f6c17d2b3eb3553faab710cb2b3d44d6bca7d1862c8c5da09c3d45debecb","src/gen/visit_mut.rs":"966ea340c53461bf8a1c6bed3c882e4ab8b8907fd18ac35531266f7891ae5f46","src/gen_helper.rs":"ea6c66388365971db6a2fc86cbb208f7eacde77e245bc8623f27a3642a3d7741","src/generics.rs":"b81ce0d3ea0f7accef4590d5181cecc4589395865abaea60b0470da727f17340","src/group.rs":"166f0fbb365471ffa3e4f554b72c2b460cbf7e3a1f9bec6c01ef6bbbcd751041","src/ident.rs":"2443e43561abea7eea577b141422258237a663499c839923d8a5ca6fea2470db","src/item.rs":"419c4d6135a7ca7b8f94b5ba038b6af8fcb3939ae807153a19e3c82e9b01e0b7","src/lib.rs":"8c152481907905472fc3e4aae63f82ed78d4d16cf8cc286675727668760c7f2e","src/lifetime.rs":"b18862ef1e690037a4f308ea897debad7bc5038584e3b26c6d8809752ea0e3c2","src/lit.rs":"fc06ddd523f7f9971d8abdb4c8d5d51030ffb3d6810615d5575ae210a7800695","src/lookahead.rs":"e2c2b6d55906421e83dab51463b58bc6dcb582f1bff9303c8b62afefb8d71e5f","src/mac.rs":"004cb89f9697564f6c9ee837e08ead68463ef946fb4c13c6c105adf2ba364b2b","src/macros.rs":"936f503c2fcde602f05220954ecaf87625c6138d0af13d33d56c7b6530110084","src/op.rs":"9d499022902743a6a0a19223b356449a979b90e60552d0446497d72750e646a4","src/parse.rs":"7b2f8caddf25a5734cbcdf7cbf043cbf9afbc07b484966cd59ddfcec9f970fb3","src/parse_macro_input.rs":"a5d16859b782bb6a2754c1066468a2f1ea05b57390caa32175bb84064973be7b","src/parse_quote.rs":"d7d996f1382c68b5fbfd4b7327ce1d389cd43c3bb3c4f382a35994d0bb79d8ab","src/pat.rs":"b2de04ae6c01df50eab9d1c3908287aca8424adc2007b926c7bcf74d1f64d40a","src/path.rs":"58a4fb3b1ff76d32cfd84a3914f8cadbf55b363c1929222b362b7465385520ac","src/print.rs":"da6529c1d9d21aaf6c835f66b4e67eacb7cf91a10eb5e9a2143b49bf99b3b5e1","src/punctuated.rs":"44c29523dee76605be2531674fe21ed2f1bbd02559aac8b7a49c70af23129ca1","src/reserved.rs":"e70e028bd55cfa43e23cab4ba29e4dc53a3d91eff685ef2b6e57efc2b87a3428","src/sealed.rs":"896a495a5340eec898527f18bd4ddca408ea03ea0ee3af30074ff48deace778d","src/span.rs":"748c51c6feb223c26d3b1701f5bb98aee823666c775c98106cfa24fe29d8cec1","src/spanned.rs":"3ca016a943637653ab98e373dfb826a120f3c159867346fa38a844439944eb39","src/stmt.rs":"601a6914f1e0bf97ae0d31d474a531d195b8c251a4ded11aa8746ac0018d367b","src/thread.rs":"815eca6bd64f4eef7c447f0809e84108f5428ff50225224b373efd8fbb696874","src/token.rs":"5e423a696f80e281c322f37c87577f9fdc28607e9c007e24896a2b12da62d5ad","src/tt.rs":"32402645b6e82ef1e882945721b59b5fb7b0ee337d1972876362ecacef643d0f","src/ty.rs":"9befd22f8c8ac731b7f68008552a1335797a3ef19184190eec0e103e4ebe18a7","src/verbatim.rs":"96d4280e4556a1841b8dcb306bc35a94d18f71dceb63f3c27a4fe7f776191760","src/whitespace.rs":"e63dd0aa3d34029f17766a8b09c1a6e4479e36c552c8b7023d710a399333aace","tests/common/eq.rs":"e930fb0bdcec3e787986b56785b1db580e5a26a5131df2f2b91a6da37069de15","tests/common/mod.rs":"432ad35577f836a20b517d8c26ed994ac25fe73ef2f461c67688b61b99762015","tests/common/parse.rs":"81580f23583723f7a2a337c4d13ebc021057cd825562fb4e474caa7cc641fed9","tests/debug/gen.rs":"1b7f875344cb04a7dd3df62deac2f410a9d107c097986e68006d87465f5f5306","tests/debug/mod.rs":"3a6bb799f478101f71c84c6f1a854a58afe2f9db43c39017909346ca20262d94","tests/macros/mod.rs":"aff805b35cfd55aef6a1359ff747e4023afcb08d69d86aff4c19465d29dda088","tests/regression.rs":"86731134bfb9bb693d9a4fc62393027de80a8bf031109ea6c7ea475b1ebdde8d","tests/regression/issue1108.rs":"adcc55a42239d344da74216ed85fc14153ddd6ca4dec4872d8339604ba78c185","tests/regression/issue1235.rs":"a2266b10c3f7c7af5734817ab0a3e8b309b51e7d177b63f26e67e6b744d280b0","tests/repo/mod.rs":"159c2c4b6416d26ac42ffc35f6cb587c4c1e2b0f24de9aa42b0337a534d7d86d","tests/repo/progress.rs":"c08d0314a7f3ecf760d471f27da3cd2a500aeb9f1c8331bffb2aa648f9fabf3f","tests/test_asyncness.rs":"cff01db49d28ab23b0b258bc6c0a5cc4071be4fe7248eef344a5d79d2fb649b7","tests/test_attribute.rs":"0ffd99384e1a52ae17d9fed5c4053e411e8f9018decef07ffa621d1faa7329d8","tests/test_derive_input.rs":"62bb86aaaaf730187a46ff700a8e3b2d1a163039b109b6a483aa44ed2b6806fe","tests/test_expr.rs":"41eb343829ad36cdea40cd06d45a90765e7fe6f1e47dd550daf1b6096c3a7b44","tests/test_generics.rs":"54b7d2afc19aa6e9049585f4c8f7d3f0c29ac3bd11a2c769e9df76f18a4f5ecb","tests/test_grouping.rs":"6276c3c73bba649dec5c97904ad2492879f918bc887a2c425d095c654ca0d925","tests/test_ident.rs":"9eb53d1e21edf23e7c9e14dc74dcc2b2538e9221e19dbcc0a44e3acc2e90f3f6","tests/test_item.rs":"a3642c80066f1e7787becfd0278af90a6b7968d6c1249e25e81663aa454cfb2a","tests/test_iterators.rs":"9cf6fde17853ce7d5617e1de9ef901c47ca35c0f1c2dd668c0d0604d7b48598c","tests/test_lit.rs":"19740ea9cd4a980bcab9b0dcaa4b032bb6ebb137fa5e4237140b97da1d9679fa","tests/test_meta.rs":"65d4586d131f6cac66694ca5e936748ec4e7f7423af6d8da509240e6be14800b","tests/test_parse_buffer.rs":"68d857f776396d064fcc0023c37093c2fbf75ee68e8241d4014d00d1423c18e9","tests/test_parse_stream.rs":"bf1db6fab7ac396fa61012faccbe6ffbc9c3d795ed2900be75e91c5b09b0c62f","tests/test_pat.rs":"d4465f4fc3fd5d6e534ba8efabe1e0ed6da89de4ac7c96effa6bfb880c4287cf","tests/test_path.rs":"71092a5ae2c9143b92a8fe15a92d39958b3c28bd4d4275cfb2d22cbdd53ada07","tests/test_precedence.rs":"736eee861c4c7a3d7d4387d2fb1b5eced1541790d34974f72b0a5532797e73c3","tests/test_receiver.rs":"084eca59984b9a18651da52f2c4407355da3de1335916a12477652999e2d01cc","tests/test_round_trip.rs":"c3c415413d5177a728c7cbbfb7ef44aebbc6a2c821dd56695156e9e33636fd57","tests/test_shebang.rs":"f5772cadad5b56e3112cb16308b779f92bce1c3a48091fc9933deb2276a69331","tests/test_should_parse.rs":"1d3535698a446e2755bfc360676bdb161841a1f454cdef6e7556c6d06a95c89d","tests/test_size.rs":"6720d55569808244ab011364c39931f06aa509cd05f98ab908b0670e8501b3c8","tests/test_stmt.rs":"0601fc32131b5501dfcdc4b4248d46bf21e0a98a49eb19439e1a46869dfb30b7","tests/test_token_trees.rs":"43e56a701817e3c3bfd0cae54a457dd7a38ccb3ca19da41e2b995fdf20e6ed18","tests/test_ty.rs":"f71d7f7f1c038aaabea8dd4c03c0d5752c76d570f8b4885a81659825bbb4d576","tests/test_visibility.rs":"7456fcb3a6634db509748aededff9c2d8b242d511a3e5ee3022e40b232892704","tests/zzz_stable.rs":"2a862e59cb446235ed99aec0e6ada8e16d3ecc30229b29d825b7c0bbc2602989"},"package":"1f4064b5b16e03ae50984a5a8ed5d4f8803e6bc1fd170a3cda91a1be4b18e3f5"} \ No newline at end of file
diff --git a/third_party/rust/syn/Cargo.toml b/third_party/rust/syn/Cargo.toml
new file mode 100644
index 0000000000..c2a36013ec
--- /dev/null
+++ b/third_party/rust/syn/Cargo.toml
@@ -0,0 +1,147 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+rust-version = "1.31"
+name = "syn"
+version = "1.0.107"
+authors = ["David Tolnay <dtolnay@gmail.com>"]
+include = [
+ "/benches/**",
+ "/build.rs",
+ "/Cargo.toml",
+ "/LICENSE-APACHE",
+ "/LICENSE-MIT",
+ "/README.md",
+ "/src/**",
+ "/tests/**",
+]
+description = "Parser for Rust source code"
+documentation = "https://docs.rs/syn"
+readme = "README.md"
+keywords = [
+ "macros",
+ "syn",
+]
+categories = [
+ "development-tools::procedural-macro-helpers",
+ "parser-implementations",
+]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/dtolnay/syn"
+
+[package.metadata.docs.rs]
+all-features = true
+targets = ["x86_64-unknown-linux-gnu"]
+rustdoc-args = [
+ "--cfg",
+ "doc_cfg",
+]
+
+[package.metadata.playground]
+features = [
+ "full",
+ "visit",
+ "visit-mut",
+ "fold",
+ "extra-traits",
+]
+
+[lib]
+doc-scrape-examples = false
+
+[[bench]]
+name = "rust"
+harness = false
+required-features = [
+ "full",
+ "parsing",
+]
+
+[[bench]]
+name = "file"
+required-features = [
+ "full",
+ "parsing",
+]
+
+[dependencies.proc-macro2]
+version = "1.0.46"
+default-features = false
+
+[dependencies.quote]
+version = "1.0"
+optional = true
+default-features = false
+
+[dependencies.unicode-ident]
+version = "1.0"
+
+[dev-dependencies.anyhow]
+version = "1.0"
+
+[dev-dependencies.automod]
+version = "1.0"
+
+[dev-dependencies.flate2]
+version = "1.0"
+
+[dev-dependencies.insta]
+version = "1.0"
+
+[dev-dependencies.rayon]
+version = "1.0"
+
+[dev-dependencies.ref-cast]
+version = "1.0"
+
+[dev-dependencies.regex]
+version = "1.0"
+
+[dev-dependencies.reqwest]
+version = "0.11"
+features = ["blocking"]
+
+[dev-dependencies.syn-test-suite]
+version = "0"
+
+[dev-dependencies.tar]
+version = "0.4.16"
+
+[dev-dependencies.termcolor]
+version = "1.0"
+
+[dev-dependencies.walkdir]
+version = "2.1"
+
+[features]
+clone-impls = []
+default = [
+ "derive",
+ "parsing",
+ "printing",
+ "clone-impls",
+ "proc-macro",
+]
+derive = []
+extra-traits = []
+fold = []
+full = []
+parsing = []
+printing = ["quote"]
+proc-macro = [
+ "proc-macro2/proc-macro",
+ "quote/proc-macro",
+]
+test = ["syn-test-suite/all-features"]
+visit = []
+visit-mut = []
diff --git a/third_party/rust/syn/LICENSE-APACHE b/third_party/rust/syn/LICENSE-APACHE
new file mode 100644
index 0000000000..16fe87b06e
--- /dev/null
+++ b/third_party/rust/syn/LICENSE-APACHE
@@ -0,0 +1,201 @@
+ Apache License
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+
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diff --git a/third_party/rust/syn/LICENSE-MIT b/third_party/rust/syn/LICENSE-MIT
new file mode 100644
index 0000000000..31aa79387f
--- /dev/null
+++ b/third_party/rust/syn/LICENSE-MIT
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diff --git a/third_party/rust/syn/README.md b/third_party/rust/syn/README.md
new file mode 100644
index 0000000000..eeef83dd58
--- /dev/null
+++ b/third_party/rust/syn/README.md
@@ -0,0 +1,285 @@
+Parser for Rust source code
+===========================
+
+[<img alt="github" src="https://img.shields.io/badge/github-dtolnay/syn-8da0cb?style=for-the-badge&labelColor=555555&logo=github" height="20">](https://github.com/dtolnay/syn)
+[<img alt="crates.io" src="https://img.shields.io/crates/v/syn.svg?style=for-the-badge&color=fc8d62&logo=rust" height="20">](https://crates.io/crates/syn)
+[<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-syn-66c2a5?style=for-the-badge&labelColor=555555&logo=docs.rs" height="20">](https://docs.rs/syn)
+[<img alt="build status" src="https://img.shields.io/github/actions/workflow/status/dtolnay/syn/ci.yml?branch=master&style=for-the-badge" height="20">](https://github.com/dtolnay/syn/actions?query=branch%3Amaster)
+
+Syn is a parsing library for parsing a stream of Rust tokens into a syntax tree
+of Rust source code.
+
+Currently this library is geared toward use in Rust procedural macros, but
+contains some APIs that may be useful more generally.
+
+- **Data structures** — Syn provides a complete syntax tree that can represent
+ any valid Rust source code. The syntax tree is rooted at [`syn::File`] which
+ represents a full source file, but there are other entry points that may be
+ useful to procedural macros including [`syn::Item`], [`syn::Expr`] and
+ [`syn::Type`].
+
+- **Derives** — Of particular interest to derive macros is [`syn::DeriveInput`]
+ which is any of the three legal input items to a derive macro. An example
+ below shows using this type in a library that can derive implementations of a
+ user-defined trait.
+
+- **Parsing** — Parsing in Syn is built around [parser functions] with the
+ signature `fn(ParseStream) -> Result<T>`. Every syntax tree node defined by
+ Syn is individually parsable and may be used as a building block for custom
+ syntaxes, or you may dream up your own brand new syntax without involving any
+ of our syntax tree types.
+
+- **Location information** — Every token parsed by Syn is associated with a
+ `Span` that tracks line and column information back to the source of that
+ token. These spans allow a procedural macro to display detailed error messages
+ pointing to all the right places in the user's code. There is an example of
+ this below.
+
+- **Feature flags** — Functionality is aggressively feature gated so your
+ procedural macros enable only what they need, and do not pay in compile time
+ for all the rest.
+
+[`syn::File`]: https://docs.rs/syn/1.0/syn/struct.File.html
+[`syn::Item`]: https://docs.rs/syn/1.0/syn/enum.Item.html
+[`syn::Expr`]: https://docs.rs/syn/1.0/syn/enum.Expr.html
+[`syn::Type`]: https://docs.rs/syn/1.0/syn/enum.Type.html
+[`syn::DeriveInput`]: https://docs.rs/syn/1.0/syn/struct.DeriveInput.html
+[parser functions]: https://docs.rs/syn/1.0/syn/parse/index.html
+
+*Version requirement: Syn supports rustc 1.31 and up.*
+
+[*Release notes*](https://github.com/dtolnay/syn/releases)
+
+<br>
+
+## Resources
+
+The best way to learn about procedural macros is by writing some. Consider
+working through [this procedural macro workshop][workshop] to get familiar with
+the different types of procedural macros. The workshop contains relevant links
+into the Syn documentation as you work through each project.
+
+[workshop]: https://github.com/dtolnay/proc-macro-workshop
+
+<br>
+
+## Example of a derive macro
+
+The canonical derive macro using Syn looks like this. We write an ordinary Rust
+function tagged with a `proc_macro_derive` attribute and the name of the trait
+we are deriving. Any time that derive appears in the user's code, the Rust
+compiler passes their data structure as tokens into our macro. We get to execute
+arbitrary Rust code to figure out what to do with those tokens, then hand some
+tokens back to the compiler to compile into the user's crate.
+
+[`TokenStream`]: https://doc.rust-lang.org/proc_macro/struct.TokenStream.html
+
+```toml
+[dependencies]
+syn = "1.0"
+quote = "1.0"
+
+[lib]
+proc-macro = true
+```
+
+```rust
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{parse_macro_input, DeriveInput};
+
+#[proc_macro_derive(MyMacro)]
+pub fn my_macro(input: TokenStream) -> TokenStream {
+ // Parse the input tokens into a syntax tree
+ let input = parse_macro_input!(input as DeriveInput);
+
+ // Build the output, possibly using quasi-quotation
+ let expanded = quote! {
+ // ...
+ };
+
+ // Hand the output tokens back to the compiler
+ TokenStream::from(expanded)
+}
+```
+
+The [`heapsize`] example directory shows a complete working implementation of a
+derive macro. It works on any Rust compiler 1.31+. The example derives a
+`HeapSize` trait which computes an estimate of the amount of heap memory owned
+by a value.
+
+[`heapsize`]: examples/heapsize
+
+```rust
+pub trait HeapSize {
+ /// Total number of bytes of heap memory owned by `self`.
+ fn heap_size_of_children(&self) -> usize;
+}
+```
+
+The derive macro allows users to write `#[derive(HeapSize)]` on data structures
+in their program.
+
+```rust
+#[derive(HeapSize)]
+struct Demo<'a, T: ?Sized> {
+ a: Box<T>,
+ b: u8,
+ c: &'a str,
+ d: String,
+}
+```
+
+<br>
+
+## Spans and error reporting
+
+The token-based procedural macro API provides great control over where the
+compiler's error messages are displayed in user code. Consider the error the
+user sees if one of their field types does not implement `HeapSize`.
+
+```rust
+#[derive(HeapSize)]
+struct Broken {
+ ok: String,
+ bad: std::thread::Thread,
+}
+```
+
+By tracking span information all the way through the expansion of a procedural
+macro as shown in the `heapsize` example, token-based macros in Syn are able to
+trigger errors that directly pinpoint the source of the problem.
+
+```console
+error[E0277]: the trait bound `std::thread::Thread: HeapSize` is not satisfied
+ --> src/main.rs:7:5
+ |
+7 | bad: std::thread::Thread,
+ | ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `HeapSize` is not implemented for `std::thread::Thread`
+```
+
+<br>
+
+## Parsing a custom syntax
+
+The [`lazy-static`] example directory shows the implementation of a
+`functionlike!(...)` procedural macro in which the input tokens are parsed using
+Syn's parsing API.
+
+[`lazy-static`]: examples/lazy-static
+
+The example reimplements the popular `lazy_static` crate from crates.io as a
+procedural macro.
+
+```rust
+lazy_static! {
+ static ref USERNAME: Regex = Regex::new("^[a-z0-9_-]{3,16}$").unwrap();
+}
+```
+
+The implementation shows how to trigger custom warnings and error messages on
+the macro input.
+
+```console
+warning: come on, pick a more creative name
+ --> src/main.rs:10:16
+ |
+10 | static ref FOO: String = "lazy_static".to_owned();
+ | ^^^
+```
+
+<br>
+
+## Testing
+
+When testing macros, we often care not just that the macro can be used
+successfully but also that when the macro is provided with invalid input it
+produces maximally helpful error messages. Consider using the [`trybuild`] crate
+to write tests for errors that are emitted by your macro or errors detected by
+the Rust compiler in the expanded code following misuse of the macro. Such tests
+help avoid regressions from later refactors that mistakenly make an error no
+longer trigger or be less helpful than it used to be.
+
+[`trybuild`]: https://github.com/dtolnay/trybuild
+
+<br>
+
+## Debugging
+
+When developing a procedural macro it can be helpful to look at what the
+generated code looks like. Use `cargo rustc -- -Zunstable-options
+--pretty=expanded` or the [`cargo expand`] subcommand.
+
+[`cargo expand`]: https://github.com/dtolnay/cargo-expand
+
+To show the expanded code for some crate that uses your procedural macro, run
+`cargo expand` from that crate. To show the expanded code for one of your own
+test cases, run `cargo expand --test the_test_case` where the last argument is
+the name of the test file without the `.rs` extension.
+
+This write-up by Brandon W Maister discusses debugging in more detail:
+[Debugging Rust's new Custom Derive system][debugging].
+
+[debugging]: https://quodlibetor.github.io/posts/debugging-rusts-new-custom-derive-system/
+
+<br>
+
+## Optional features
+
+Syn puts a lot of functionality behind optional features in order to optimize
+compile time for the most common use cases. The following features are
+available.
+
+- **`derive`** *(enabled by default)* — Data structures for representing the
+ possible input to a derive macro, including structs and enums and types.
+- **`full`** — Data structures for representing the syntax tree of all valid
+ Rust source code, including items and expressions.
+- **`parsing`** *(enabled by default)* — Ability to parse input tokens into a
+ syntax tree node of a chosen type.
+- **`printing`** *(enabled by default)* — Ability to print a syntax tree node as
+ tokens of Rust source code.
+- **`visit`** — Trait for traversing a syntax tree.
+- **`visit-mut`** — Trait for traversing and mutating in place a syntax tree.
+- **`fold`** — Trait for transforming an owned syntax tree.
+- **`clone-impls`** *(enabled by default)* — Clone impls for all syntax tree
+ types.
+- **`extra-traits`** — Debug, Eq, PartialEq, Hash impls for all syntax tree
+ types.
+- **`proc-macro`** *(enabled by default)* — Runtime dependency on the dynamic
+ library libproc_macro from rustc toolchain.
+
+<br>
+
+## Proc macro shim
+
+Syn operates on the token representation provided by the [proc-macro2] crate
+from crates.io rather than using the compiler's built in proc-macro crate
+directly. This enables code using Syn to execute outside of the context of a
+procedural macro, such as in unit tests or build.rs, and we avoid needing
+incompatible ecosystems for proc macros vs non-macro use cases.
+
+In general all of your code should be written against proc-macro2 rather than
+proc-macro. The one exception is in the signatures of procedural macro entry
+points, which are required by the language to use `proc_macro::TokenStream`.
+
+The proc-macro2 crate will automatically detect and use the compiler's data
+structures when a procedural macro is active.
+
+[proc-macro2]: https://docs.rs/proc-macro2/1.0/proc_macro2/
+
+<br>
+
+#### License
+
+<sup>
+Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
+2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.
+</sup>
+
+<br>
+
+<sub>
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
+be dual licensed as above, without any additional terms or conditions.
+</sub>
diff --git a/third_party/rust/syn/benches/file.rs b/third_party/rust/syn/benches/file.rs
new file mode 100644
index 0000000000..bd4a247df6
--- /dev/null
+++ b/third_party/rust/syn/benches/file.rs
@@ -0,0 +1,55 @@
+// $ cargo bench --features full,test --bench file
+
+#![feature(rustc_private, test)]
+#![recursion_limit = "1024"]
+#![allow(
+ clippy::items_after_statements,
+ clippy::missing_panics_doc,
+ clippy::must_use_candidate
+)]
+
+extern crate test;
+
+#[macro_use]
+#[path = "../tests/macros/mod.rs"]
+mod macros;
+
+#[path = "../tests/common/mod.rs"]
+mod common;
+#[path = "../tests/repo/mod.rs"]
+pub mod repo;
+
+use proc_macro2::{Span, TokenStream};
+use std::fs;
+use std::str::FromStr;
+use syn::parse::{ParseStream, Parser};
+use test::Bencher;
+
+const FILE: &str = "tests/rust/library/core/src/str/mod.rs";
+
+fn get_tokens() -> TokenStream {
+ repo::clone_rust();
+ let content = fs::read_to_string(FILE).unwrap();
+ TokenStream::from_str(&content).unwrap()
+}
+
+#[bench]
+fn baseline(b: &mut Bencher) {
+ let tokens = get_tokens();
+ b.iter(|| drop(tokens.clone()));
+}
+
+#[bench]
+fn create_token_buffer(b: &mut Bencher) {
+ let tokens = get_tokens();
+ fn immediate_fail(_input: ParseStream) -> syn::Result<()> {
+ Err(syn::Error::new(Span::call_site(), ""))
+ }
+ b.iter(|| immediate_fail.parse2(tokens.clone()));
+}
+
+#[bench]
+fn parse_file(b: &mut Bencher) {
+ let tokens = get_tokens();
+ b.iter(|| syn::parse2::<syn::File>(tokens.clone()));
+}
diff --git a/third_party/rust/syn/benches/rust.rs b/third_party/rust/syn/benches/rust.rs
new file mode 100644
index 0000000000..e3f8f550ab
--- /dev/null
+++ b/third_party/rust/syn/benches/rust.rs
@@ -0,0 +1,170 @@
+// $ cargo bench --features full,test --bench rust
+//
+// Syn only, useful for profiling:
+// $ RUSTFLAGS='--cfg syn_only' cargo build --release --features full,test --bench rust
+
+#![cfg_attr(not(syn_only), feature(rustc_private))]
+#![recursion_limit = "1024"]
+#![allow(clippy::cast_lossless, clippy::unnecessary_wraps)]
+
+#[macro_use]
+#[path = "../tests/macros/mod.rs"]
+mod macros;
+
+#[path = "../tests/common/mod.rs"]
+mod common;
+#[path = "../tests/repo/mod.rs"]
+mod repo;
+
+use std::fs;
+use std::time::{Duration, Instant};
+
+#[cfg(not(syn_only))]
+mod tokenstream_parse {
+ use proc_macro2::TokenStream;
+ use std::str::FromStr;
+
+ pub fn bench(content: &str) -> Result<(), ()> {
+ TokenStream::from_str(content).map(drop).map_err(drop)
+ }
+}
+
+mod syn_parse {
+ pub fn bench(content: &str) -> Result<(), ()> {
+ syn::parse_file(content).map(drop).map_err(drop)
+ }
+}
+
+#[cfg(not(syn_only))]
+mod librustc_parse {
+ extern crate rustc_data_structures;
+ extern crate rustc_error_messages;
+ extern crate rustc_errors;
+ extern crate rustc_parse;
+ extern crate rustc_session;
+ extern crate rustc_span;
+
+ use rustc_data_structures::sync::Lrc;
+ use rustc_error_messages::FluentBundle;
+ use rustc_errors::{emitter::Emitter, translation::Translate, Diagnostic, Handler};
+ use rustc_session::parse::ParseSess;
+ use rustc_span::source_map::{FilePathMapping, SourceMap};
+ use rustc_span::{edition::Edition, FileName};
+
+ pub fn bench(content: &str) -> Result<(), ()> {
+ struct SilentEmitter;
+
+ impl Emitter for SilentEmitter {
+ fn emit_diagnostic(&mut self, _diag: &Diagnostic) {}
+ fn source_map(&self) -> Option<&Lrc<SourceMap>> {
+ None
+ }
+ }
+
+ impl Translate for SilentEmitter {
+ fn fluent_bundle(&self) -> Option<&Lrc<FluentBundle>> {
+ None
+ }
+ fn fallback_fluent_bundle(&self) -> &FluentBundle {
+ panic!("silent emitter attempted to translate a diagnostic");
+ }
+ }
+
+ rustc_span::create_session_if_not_set_then(Edition::Edition2018, |_| {
+ let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
+ let emitter = Box::new(SilentEmitter);
+ let handler = Handler::with_emitter(false, None, emitter);
+ let sess = ParseSess::with_span_handler(handler, cm);
+ if let Err(diagnostic) = rustc_parse::parse_crate_from_source_str(
+ FileName::Custom("bench".to_owned()),
+ content.to_owned(),
+ &sess,
+ ) {
+ diagnostic.cancel();
+ return Err(());
+ };
+ Ok(())
+ })
+ }
+}
+
+#[cfg(not(syn_only))]
+mod read_from_disk {
+ pub fn bench(content: &str) -> Result<(), ()> {
+ _ = content;
+ Ok(())
+ }
+}
+
+fn exec(mut codepath: impl FnMut(&str) -> Result<(), ()>) -> Duration {
+ let begin = Instant::now();
+ let mut success = 0;
+ let mut total = 0;
+
+ walkdir::WalkDir::new("tests/rust/src")
+ .into_iter()
+ .filter_entry(repo::base_dir_filter)
+ .for_each(|entry| {
+ let entry = entry.unwrap();
+ let path = entry.path();
+ if path.is_dir() {
+ return;
+ }
+ let content = fs::read_to_string(path).unwrap();
+ let ok = codepath(&content).is_ok();
+ success += ok as usize;
+ total += 1;
+ if !ok {
+ eprintln!("FAIL {}", path.display());
+ }
+ });
+
+ assert_eq!(success, total);
+ begin.elapsed()
+}
+
+fn main() {
+ repo::clone_rust();
+
+ macro_rules! testcases {
+ ($($(#[$cfg:meta])* $name:ident,)*) => {
+ [
+ $(
+ $(#[$cfg])*
+ (stringify!($name), $name::bench as fn(&str) -> Result<(), ()>),
+ )*
+ ]
+ };
+ }
+
+ #[cfg(not(syn_only))]
+ {
+ let mut lines = 0;
+ let mut files = 0;
+ exec(|content| {
+ lines += content.lines().count();
+ files += 1;
+ Ok(())
+ });
+ eprintln!("\n{} lines in {} files", lines, files);
+ }
+
+ for (name, f) in testcases!(
+ #[cfg(not(syn_only))]
+ read_from_disk,
+ #[cfg(not(syn_only))]
+ tokenstream_parse,
+ syn_parse,
+ #[cfg(not(syn_only))]
+ librustc_parse,
+ ) {
+ eprint!("{:20}", format!("{}:", name));
+ let elapsed = exec(f);
+ eprintln!(
+ "elapsed={}.{:03}s",
+ elapsed.as_secs(),
+ elapsed.subsec_millis(),
+ );
+ }
+ eprintln!();
+}
diff --git a/third_party/rust/syn/build.rs b/third_party/rust/syn/build.rs
new file mode 100644
index 0000000000..1a2c077bf0
--- /dev/null
+++ b/third_party/rust/syn/build.rs
@@ -0,0 +1,51 @@
+use std::env;
+use std::process::Command;
+use std::str;
+
+// The rustc-cfg strings below are *not* public API. Please let us know by
+// opening a GitHub issue if your build environment requires some way to enable
+// these cfgs other than by executing our build script.
+fn main() {
+ let compiler = match rustc_version() {
+ Some(compiler) => compiler,
+ None => return,
+ };
+
+ if compiler.minor < 36 {
+ println!("cargo:rustc-cfg=syn_omit_await_from_token_macro");
+ }
+
+ if compiler.minor < 39 {
+ println!("cargo:rustc-cfg=syn_no_const_vec_new");
+ }
+
+ if compiler.minor < 40 {
+ println!("cargo:rustc-cfg=syn_no_non_exhaustive");
+ }
+
+ if compiler.minor < 56 {
+ println!("cargo:rustc-cfg=syn_no_negative_literal_parse");
+ }
+
+ if !compiler.nightly {
+ println!("cargo:rustc-cfg=syn_disable_nightly_tests");
+ }
+}
+
+struct Compiler {
+ minor: u32,
+ nightly: bool,
+}
+
+fn rustc_version() -> Option<Compiler> {
+ let rustc = env::var_os("RUSTC")?;
+ let output = Command::new(rustc).arg("--version").output().ok()?;
+ let version = str::from_utf8(&output.stdout).ok()?;
+ let mut pieces = version.split('.');
+ if pieces.next() != Some("rustc 1") {
+ return None;
+ }
+ let minor = pieces.next()?.parse().ok()?;
+ let nightly = version.contains("nightly") || version.ends_with("-dev");
+ Some(Compiler { minor, nightly })
+}
diff --git a/third_party/rust/syn/src/attr.rs b/third_party/rust/syn/src/attr.rs
new file mode 100644
index 0000000000..bace94f43c
--- /dev/null
+++ b/third_party/rust/syn/src/attr.rs
@@ -0,0 +1,662 @@
+use super::*;
+use crate::punctuated::Punctuated;
+use proc_macro2::TokenStream;
+use std::iter;
+use std::slice;
+
+#[cfg(feature = "parsing")]
+use crate::parse::{Parse, ParseBuffer, ParseStream, Parser, Result};
+#[cfg(feature = "parsing")]
+use crate::punctuated::Pair;
+
+ast_struct! {
+ /// An attribute like `#[repr(transparent)]`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ ///
+ /// <br>
+ ///
+ /// # Syntax
+ ///
+ /// Rust has six types of attributes.
+ ///
+ /// - Outer attributes like `#[repr(transparent)]`. These appear outside or
+ /// in front of the item they describe.
+ /// - Inner attributes like `#![feature(proc_macro)]`. These appear inside
+ /// of the item they describe, usually a module.
+ /// - Outer doc comments like `/// # Example`.
+ /// - Inner doc comments like `//! Please file an issue`.
+ /// - Outer block comments `/** # Example */`.
+ /// - Inner block comments `/*! Please file an issue */`.
+ ///
+ /// The `style` field of type `AttrStyle` distinguishes whether an attribute
+ /// is outer or inner. Doc comments and block comments are promoted to
+ /// attributes, as this is how they are processed by the compiler and by
+ /// `macro_rules!` macros.
+ ///
+ /// The `path` field gives the possibly colon-delimited path against which
+ /// the attribute is resolved. It is equal to `"doc"` for desugared doc
+ /// comments. The `tokens` field contains the rest of the attribute body as
+ /// tokens.
+ ///
+ /// ```text
+ /// #[derive(Copy)] #[crate::precondition x < 5]
+ /// ^^^^^^~~~~~~ ^^^^^^^^^^^^^^^^^^^ ~~~~~
+ /// path tokens path tokens
+ /// ```
+ ///
+ /// <br>
+ ///
+ /// # Parsing from tokens to Attribute
+ ///
+ /// This type does not implement the [`Parse`] trait and thus cannot be
+ /// parsed directly by [`ParseStream::parse`]. Instead use
+ /// [`ParseStream::call`] with one of the two parser functions
+ /// [`Attribute::parse_outer`] or [`Attribute::parse_inner`] depending on
+ /// which you intend to parse.
+ ///
+ /// [`Parse`]: parse::Parse
+ /// [`ParseStream::parse`]: parse::ParseBuffer::parse
+ /// [`ParseStream::call`]: parse::ParseBuffer::call
+ ///
+ /// ```
+ /// use syn::{Attribute, Ident, Result, Token};
+ /// use syn::parse::{Parse, ParseStream};
+ ///
+ /// // Parses a unit struct with attributes.
+ /// //
+ /// // #[path = "s.tmpl"]
+ /// // struct S;
+ /// struct UnitStruct {
+ /// attrs: Vec<Attribute>,
+ /// struct_token: Token![struct],
+ /// name: Ident,
+ /// semi_token: Token![;],
+ /// }
+ ///
+ /// impl Parse for UnitStruct {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// Ok(UnitStruct {
+ /// attrs: input.call(Attribute::parse_outer)?,
+ /// struct_token: input.parse()?,
+ /// name: input.parse()?,
+ /// semi_token: input.parse()?,
+ /// })
+ /// }
+ /// }
+ /// ```
+ ///
+ /// <p><br></p>
+ ///
+ /// # Parsing from Attribute to structured arguments
+ ///
+ /// The grammar of attributes in Rust is very flexible, which makes the
+ /// syntax tree not that useful on its own. In particular, arguments of the
+ /// attribute are held in an arbitrary `tokens: TokenStream`. Macros are
+ /// expected to check the `path` of the attribute, decide whether they
+ /// recognize it, and then parse the remaining tokens according to whatever
+ /// grammar they wish to require for that kind of attribute.
+ ///
+ /// If the attribute you are parsing is expected to conform to the
+ /// conventional structured form of attribute, use [`parse_meta()`] to
+ /// obtain that structured representation. If the attribute follows some
+ /// other grammar of its own, use [`parse_args()`] to parse that into the
+ /// expected data structure.
+ ///
+ /// [`parse_meta()`]: Attribute::parse_meta
+ /// [`parse_args()`]: Attribute::parse_args
+ ///
+ /// <p><br></p>
+ ///
+ /// # Doc comments
+ ///
+ /// The compiler transforms doc comments, such as `/// comment` and `/*!
+ /// comment */`, into attributes before macros are expanded. Each comment is
+ /// expanded into an attribute of the form `#[doc = r"comment"]`.
+ ///
+ /// As an example, the following `mod` items are expanded identically:
+ ///
+ /// ```
+ /// # use syn::{ItemMod, parse_quote};
+ /// let doc: ItemMod = parse_quote! {
+ /// /// Single line doc comments
+ /// /// We write so many!
+ /// /**
+ /// * Multi-line comments...
+ /// * May span many lines
+ /// */
+ /// mod example {
+ /// //! Of course, they can be inner too
+ /// /*! And fit in a single line */
+ /// }
+ /// };
+ /// let attr: ItemMod = parse_quote! {
+ /// #[doc = r" Single line doc comments"]
+ /// #[doc = r" We write so many!"]
+ /// #[doc = r"
+ /// * Multi-line comments...
+ /// * May span many lines
+ /// "]
+ /// mod example {
+ /// #![doc = r" Of course, they can be inner too"]
+ /// #![doc = r" And fit in a single line "]
+ /// }
+ /// };
+ /// assert_eq!(doc, attr);
+ /// ```
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Attribute {
+ pub pound_token: Token![#],
+ pub style: AttrStyle,
+ pub bracket_token: token::Bracket,
+ pub path: Path,
+ pub tokens: TokenStream,
+ }
+}
+
+impl Attribute {
+ /// Parses the content of the attribute, consisting of the path and tokens,
+ /// as a [`Meta`] if possible.
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_meta(&self) -> Result<Meta> {
+ fn clone_ident_segment(segment: &PathSegment) -> PathSegment {
+ PathSegment {
+ ident: segment.ident.clone(),
+ arguments: PathArguments::None,
+ }
+ }
+
+ let path = Path {
+ leading_colon: self
+ .path
+ .leading_colon
+ .as_ref()
+ .map(|colon| Token![::](colon.spans)),
+ segments: self
+ .path
+ .segments
+ .pairs()
+ .map(|pair| match pair {
+ Pair::Punctuated(seg, punct) => {
+ Pair::Punctuated(clone_ident_segment(seg), Token![::](punct.spans))
+ }
+ Pair::End(seg) => Pair::End(clone_ident_segment(seg)),
+ })
+ .collect(),
+ };
+
+ let parser = |input: ParseStream| parsing::parse_meta_after_path(path, input);
+ parse::Parser::parse2(parser, self.tokens.clone())
+ }
+
+ /// Parse the arguments to the attribute as a syntax tree.
+ ///
+ /// This is similar to `syn::parse2::<T>(attr.tokens)` except that:
+ ///
+ /// - the surrounding delimiters are *not* included in the input to the
+ /// parser; and
+ /// - the error message has a more useful span when `tokens` is empty.
+ ///
+ /// ```text
+ /// #[my_attr(value < 5)]
+ /// ^^^^^^^^^ what gets parsed
+ /// ```
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_args<T: Parse>(&self) -> Result<T> {
+ self.parse_args_with(T::parse)
+ }
+
+ /// Parse the arguments to the attribute using the given parser.
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_args_with<F: Parser>(&self, parser: F) -> Result<F::Output> {
+ let parser = |input: ParseStream| {
+ let args = enter_args(self, input)?;
+ parse::parse_stream(parser, &args)
+ };
+ parser.parse2(self.tokens.clone())
+ }
+
+ /// Parses zero or more outer attributes from the stream.
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_outer(input: ParseStream) -> Result<Vec<Self>> {
+ let mut attrs = Vec::new();
+ while input.peek(Token![#]) {
+ attrs.push(input.call(parsing::single_parse_outer)?);
+ }
+ Ok(attrs)
+ }
+
+ /// Parses zero or more inner attributes from the stream.
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_inner(input: ParseStream) -> Result<Vec<Self>> {
+ let mut attrs = Vec::new();
+ parsing::parse_inner(input, &mut attrs)?;
+ Ok(attrs)
+ }
+}
+
+#[cfg(feature = "parsing")]
+fn expected_parentheses(attr: &Attribute) -> String {
+ let style = match attr.style {
+ AttrStyle::Outer => "#",
+ AttrStyle::Inner(_) => "#!",
+ };
+
+ let mut path = String::new();
+ for segment in &attr.path.segments {
+ if !path.is_empty() || attr.path.leading_colon.is_some() {
+ path += "::";
+ }
+ path += &segment.ident.to_string();
+ }
+
+ format!("{}[{}(...)]", style, path)
+}
+
+#[cfg(feature = "parsing")]
+fn enter_args<'a>(attr: &Attribute, input: ParseStream<'a>) -> Result<ParseBuffer<'a>> {
+ if input.is_empty() {
+ let expected = expected_parentheses(attr);
+ let msg = format!("expected attribute arguments in parentheses: {}", expected);
+ return Err(crate::error::new2(
+ attr.pound_token.span,
+ attr.bracket_token.span,
+ msg,
+ ));
+ } else if input.peek(Token![=]) {
+ let expected = expected_parentheses(attr);
+ let msg = format!("expected parentheses: {}", expected);
+ return Err(input.error(msg));
+ };
+
+ let content;
+ if input.peek(token::Paren) {
+ parenthesized!(content in input);
+ } else if input.peek(token::Bracket) {
+ bracketed!(content in input);
+ } else if input.peek(token::Brace) {
+ braced!(content in input);
+ } else {
+ return Err(input.error("unexpected token in attribute arguments"));
+ }
+
+ if input.is_empty() {
+ Ok(content)
+ } else {
+ Err(input.error("unexpected token in attribute arguments"))
+ }
+}
+
+ast_enum! {
+ /// Distinguishes between attributes that decorate an item and attributes
+ /// that are contained within an item.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ ///
+ /// # Outer attributes
+ ///
+ /// - `#[repr(transparent)]`
+ /// - `/// # Example`
+ /// - `/** Please file an issue */`
+ ///
+ /// # Inner attributes
+ ///
+ /// - `#![feature(proc_macro)]`
+ /// - `//! # Example`
+ /// - `/*! Please file an issue */`
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum AttrStyle {
+ Outer,
+ Inner(Token![!]),
+ }
+}
+
+ast_enum_of_structs! {
+ /// Content of a compile-time structured attribute.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ ///
+ /// ## Path
+ ///
+ /// A meta path is like the `test` in `#[test]`.
+ ///
+ /// ## List
+ ///
+ /// A meta list is like the `derive(Copy)` in `#[derive(Copy)]`.
+ ///
+ /// ## NameValue
+ ///
+ /// A name-value meta is like the `path = "..."` in `#[path =
+ /// "sys/windows.rs"]`.
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum Meta {
+ Path(Path),
+
+ /// A structured list within an attribute, like `derive(Copy, Clone)`.
+ List(MetaList),
+
+ /// A name-value pair within an attribute, like `feature = "nightly"`.
+ NameValue(MetaNameValue),
+ }
+}
+
+ast_struct! {
+ /// A structured list within an attribute, like `derive(Copy, Clone)`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct MetaList {
+ pub path: Path,
+ pub paren_token: token::Paren,
+ pub nested: Punctuated<NestedMeta, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// A name-value pair within an attribute, like `feature = "nightly"`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct MetaNameValue {
+ pub path: Path,
+ pub eq_token: Token![=],
+ pub lit: Lit,
+ }
+}
+
+impl Meta {
+ /// Returns the identifier that begins this structured meta item.
+ ///
+ /// For example this would return the `test` in `#[test]`, the `derive` in
+ /// `#[derive(Copy)]`, and the `path` in `#[path = "sys/windows.rs"]`.
+ pub fn path(&self) -> &Path {
+ match self {
+ Meta::Path(path) => path,
+ Meta::List(meta) => &meta.path,
+ Meta::NameValue(meta) => &meta.path,
+ }
+ }
+}
+
+ast_enum_of_structs! {
+ /// Element of a compile-time attribute list.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum NestedMeta {
+ /// A structured meta item, like the `Copy` in `#[derive(Copy)]` which
+ /// would be a nested `Meta::Path`.
+ Meta(Meta),
+
+ /// A Rust literal, like the `"new_name"` in `#[rename("new_name")]`.
+ Lit(Lit),
+ }
+}
+
+/// Conventional argument type associated with an invocation of an attribute
+/// macro.
+///
+/// For example if we are developing an attribute macro that is intended to be
+/// invoked on function items as follows:
+///
+/// ```
+/// # const IGNORE: &str = stringify! {
+/// #[my_attribute(path = "/v1/refresh")]
+/// # };
+/// pub fn refresh() {
+/// /* ... */
+/// }
+/// ```
+///
+/// The implementation of this macro would want to parse its attribute arguments
+/// as type `AttributeArgs`.
+///
+/// ```
+/// # extern crate proc_macro;
+/// #
+/// use proc_macro::TokenStream;
+/// use syn::{parse_macro_input, AttributeArgs, ItemFn};
+///
+/// # const IGNORE: &str = stringify! {
+/// #[proc_macro_attribute]
+/// # };
+/// pub fn my_attribute(args: TokenStream, input: TokenStream) -> TokenStream {
+/// let args = parse_macro_input!(args as AttributeArgs);
+/// let input = parse_macro_input!(input as ItemFn);
+///
+/// /* ... */
+/// # "".parse().unwrap()
+/// }
+/// ```
+#[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+pub type AttributeArgs = Vec<NestedMeta>;
+
+pub trait FilterAttrs<'a> {
+ type Ret: Iterator<Item = &'a Attribute>;
+
+ fn outer(self) -> Self::Ret;
+ fn inner(self) -> Self::Ret;
+}
+
+impl<'a> FilterAttrs<'a> for &'a [Attribute] {
+ type Ret = iter::Filter<slice::Iter<'a, Attribute>, fn(&&Attribute) -> bool>;
+
+ fn outer(self) -> Self::Ret {
+ fn is_outer(attr: &&Attribute) -> bool {
+ match attr.style {
+ AttrStyle::Outer => true,
+ AttrStyle::Inner(_) => false,
+ }
+ }
+ self.iter().filter(is_outer)
+ }
+
+ fn inner(self) -> Self::Ret {
+ fn is_inner(attr: &&Attribute) -> bool {
+ match attr.style {
+ AttrStyle::Inner(_) => true,
+ AttrStyle::Outer => false,
+ }
+ }
+ self.iter().filter(is_inner)
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::ext::IdentExt;
+ use crate::parse::{Parse, ParseStream, Result};
+
+ pub fn parse_inner(input: ParseStream, attrs: &mut Vec<Attribute>) -> Result<()> {
+ while input.peek(Token![#]) && input.peek2(Token![!]) {
+ attrs.push(input.call(parsing::single_parse_inner)?);
+ }
+ Ok(())
+ }
+
+ pub fn single_parse_inner(input: ParseStream) -> Result<Attribute> {
+ let content;
+ Ok(Attribute {
+ pound_token: input.parse()?,
+ style: AttrStyle::Inner(input.parse()?),
+ bracket_token: bracketed!(content in input),
+ path: content.call(Path::parse_mod_style)?,
+ tokens: content.parse()?,
+ })
+ }
+
+ pub fn single_parse_outer(input: ParseStream) -> Result<Attribute> {
+ let content;
+ Ok(Attribute {
+ pound_token: input.parse()?,
+ style: AttrStyle::Outer,
+ bracket_token: bracketed!(content in input),
+ path: content.call(Path::parse_mod_style)?,
+ tokens: content.parse()?,
+ })
+ }
+
+ // Like Path::parse_mod_style but accepts keywords in the path.
+ fn parse_meta_path(input: ParseStream) -> Result<Path> {
+ Ok(Path {
+ leading_colon: input.parse()?,
+ segments: {
+ let mut segments = Punctuated::new();
+ while input.peek(Ident::peek_any) {
+ let ident = Ident::parse_any(input)?;
+ segments.push_value(PathSegment::from(ident));
+ if !input.peek(Token![::]) {
+ break;
+ }
+ let punct = input.parse()?;
+ segments.push_punct(punct);
+ }
+ if segments.is_empty() {
+ return Err(input.error("expected path"));
+ } else if segments.trailing_punct() {
+ return Err(input.error("expected path segment"));
+ }
+ segments
+ },
+ })
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Meta {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let path = input.call(parse_meta_path)?;
+ parse_meta_after_path(path, input)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for MetaList {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let path = input.call(parse_meta_path)?;
+ parse_meta_list_after_path(path, input)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for MetaNameValue {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let path = input.call(parse_meta_path)?;
+ parse_meta_name_value_after_path(path, input)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for NestedMeta {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Lit) && !(input.peek(LitBool) && input.peek2(Token![=])) {
+ input.parse().map(NestedMeta::Lit)
+ } else if input.peek(Ident::peek_any)
+ || input.peek(Token![::]) && input.peek3(Ident::peek_any)
+ {
+ input.parse().map(NestedMeta::Meta)
+ } else {
+ Err(input.error("expected identifier or literal"))
+ }
+ }
+ }
+
+ pub fn parse_meta_after_path(path: Path, input: ParseStream) -> Result<Meta> {
+ if input.peek(token::Paren) {
+ parse_meta_list_after_path(path, input).map(Meta::List)
+ } else if input.peek(Token![=]) {
+ parse_meta_name_value_after_path(path, input).map(Meta::NameValue)
+ } else {
+ Ok(Meta::Path(path))
+ }
+ }
+
+ fn parse_meta_list_after_path(path: Path, input: ParseStream) -> Result<MetaList> {
+ let content;
+ Ok(MetaList {
+ path,
+ paren_token: parenthesized!(content in input),
+ nested: content.parse_terminated(NestedMeta::parse)?,
+ })
+ }
+
+ fn parse_meta_name_value_after_path(path: Path, input: ParseStream) -> Result<MetaNameValue> {
+ Ok(MetaNameValue {
+ path,
+ eq_token: input.parse()?,
+ lit: input.parse()?,
+ })
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use proc_macro2::TokenStream;
+ use quote::ToTokens;
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Attribute {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.pound_token.to_tokens(tokens);
+ if let AttrStyle::Inner(b) = &self.style {
+ b.to_tokens(tokens);
+ }
+ self.bracket_token.surround(tokens, |tokens| {
+ self.path.to_tokens(tokens);
+ self.tokens.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for MetaList {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.path.to_tokens(tokens);
+ self.paren_token.surround(tokens, |tokens| {
+ self.nested.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for MetaNameValue {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.path.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ self.lit.to_tokens(tokens);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/await.rs b/third_party/rust/syn/src/await.rs
new file mode 100644
index 0000000000..038c6a5d12
--- /dev/null
+++ b/third_party/rust/syn/src/await.rs
@@ -0,0 +1,2 @@
+// See include!("await.rs") in token.rs.
+export_token_macro! {[await]}
diff --git a/third_party/rust/syn/src/bigint.rs b/third_party/rust/syn/src/bigint.rs
new file mode 100644
index 0000000000..5397d6beee
--- /dev/null
+++ b/third_party/rust/syn/src/bigint.rs
@@ -0,0 +1,66 @@
+use std::ops::{AddAssign, MulAssign};
+
+// For implementing base10_digits() accessor on LitInt.
+pub struct BigInt {
+ digits: Vec<u8>,
+}
+
+impl BigInt {
+ pub fn new() -> Self {
+ BigInt { digits: Vec::new() }
+ }
+
+ pub fn to_string(&self) -> String {
+ let mut repr = String::with_capacity(self.digits.len());
+
+ let mut has_nonzero = false;
+ for digit in self.digits.iter().rev() {
+ has_nonzero |= *digit != 0;
+ if has_nonzero {
+ repr.push((*digit + b'0') as char);
+ }
+ }
+
+ if repr.is_empty() {
+ repr.push('0');
+ }
+
+ repr
+ }
+
+ fn reserve_two_digits(&mut self) {
+ let len = self.digits.len();
+ let desired =
+ len + !self.digits.ends_with(&[0, 0]) as usize + !self.digits.ends_with(&[0]) as usize;
+ self.digits.resize(desired, 0);
+ }
+}
+
+impl AddAssign<u8> for BigInt {
+ // Assumes increment <16.
+ fn add_assign(&mut self, mut increment: u8) {
+ self.reserve_two_digits();
+
+ let mut i = 0;
+ while increment > 0 {
+ let sum = self.digits[i] + increment;
+ self.digits[i] = sum % 10;
+ increment = sum / 10;
+ i += 1;
+ }
+ }
+}
+
+impl MulAssign<u8> for BigInt {
+ // Assumes base <=16.
+ fn mul_assign(&mut self, base: u8) {
+ self.reserve_two_digits();
+
+ let mut carry = 0;
+ for digit in &mut self.digits {
+ let prod = *digit * base + carry;
+ *digit = prod % 10;
+ carry = prod / 10;
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/buffer.rs b/third_party/rust/syn/src/buffer.rs
new file mode 100644
index 0000000000..0d5cf30d57
--- /dev/null
+++ b/third_party/rust/syn/src/buffer.rs
@@ -0,0 +1,398 @@
+//! A stably addressed token buffer supporting efficient traversal based on a
+//! cheaply copyable cursor.
+//!
+//! *This module is available only if Syn is built with the `"parsing"` feature.*
+
+// This module is heavily commented as it contains most of the unsafe code in
+// Syn, and caution should be used when editing it. The public-facing interface
+// is 100% safe but the implementation is fragile internally.
+
+#[cfg(all(
+ not(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "wasi"))),
+ feature = "proc-macro"
+))]
+use crate::proc_macro as pm;
+use crate::Lifetime;
+use proc_macro2::{Delimiter, Group, Ident, Literal, Punct, Spacing, Span, TokenStream, TokenTree};
+use std::cmp::Ordering;
+use std::marker::PhantomData;
+
+/// Internal type which is used instead of `TokenTree` to represent a token tree
+/// within a `TokenBuffer`.
+enum Entry {
+ // Mimicking types from proc-macro.
+ // Group entries contain the offset to the matching End entry.
+ Group(Group, usize),
+ Ident(Ident),
+ Punct(Punct),
+ Literal(Literal),
+ // End entries contain the offset (negative) to the start of the buffer.
+ End(isize),
+}
+
+/// A buffer that can be efficiently traversed multiple times, unlike
+/// `TokenStream` which requires a deep copy in order to traverse more than
+/// once.
+///
+/// *This type is available only if Syn is built with the `"parsing"` feature.*
+pub struct TokenBuffer {
+ // NOTE: Do not implement clone on this - while the current design could be
+ // cloned, other designs which could be desirable may not be cloneable.
+ entries: Box<[Entry]>,
+}
+
+impl TokenBuffer {
+ fn recursive_new(entries: &mut Vec<Entry>, stream: TokenStream) {
+ for tt in stream {
+ match tt {
+ TokenTree::Ident(ident) => entries.push(Entry::Ident(ident)),
+ TokenTree::Punct(punct) => entries.push(Entry::Punct(punct)),
+ TokenTree::Literal(literal) => entries.push(Entry::Literal(literal)),
+ TokenTree::Group(group) => {
+ let group_start_index = entries.len();
+ entries.push(Entry::End(0)); // we replace this below
+ Self::recursive_new(entries, group.stream());
+ let group_end_index = entries.len();
+ entries.push(Entry::End(-(group_end_index as isize)));
+ let group_end_offset = group_end_index - group_start_index;
+ entries[group_start_index] = Entry::Group(group, group_end_offset);
+ }
+ }
+ }
+ }
+
+ /// Creates a `TokenBuffer` containing all the tokens from the input
+ /// `proc_macro::TokenStream`.
+ ///
+ /// *This method is available only if Syn is built with both the `"parsing"` and
+ /// `"proc-macro"` features.*
+ #[cfg(all(
+ not(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "wasi"))),
+ feature = "proc-macro"
+ ))]
+ pub fn new(stream: pm::TokenStream) -> Self {
+ Self::new2(stream.into())
+ }
+
+ /// Creates a `TokenBuffer` containing all the tokens from the input
+ /// `proc_macro2::TokenStream`.
+ pub fn new2(stream: TokenStream) -> Self {
+ let mut entries = Vec::new();
+ Self::recursive_new(&mut entries, stream);
+ entries.push(Entry::End(-(entries.len() as isize)));
+ Self {
+ entries: entries.into_boxed_slice(),
+ }
+ }
+
+ /// Creates a cursor referencing the first token in the buffer and able to
+ /// traverse until the end of the buffer.
+ pub fn begin(&self) -> Cursor {
+ let ptr = self.entries.as_ptr();
+ unsafe { Cursor::create(ptr, ptr.add(self.entries.len() - 1)) }
+ }
+}
+
+/// A cheaply copyable cursor into a `TokenBuffer`.
+///
+/// This cursor holds a shared reference into the immutable data which is used
+/// internally to represent a `TokenStream`, and can be efficiently manipulated
+/// and copied around.
+///
+/// An empty `Cursor` can be created directly, or one may create a `TokenBuffer`
+/// object and get a cursor to its first token with `begin()`.
+///
+/// Two cursors are equal if they have the same location in the same input
+/// stream, and have the same scope.
+///
+/// *This type is available only if Syn is built with the `"parsing"` feature.*
+pub struct Cursor<'a> {
+ // The current entry which the `Cursor` is pointing at.
+ ptr: *const Entry,
+ // This is the only `Entry::End` object which this cursor is allowed to
+ // point at. All other `End` objects are skipped over in `Cursor::create`.
+ scope: *const Entry,
+ // Cursor is covariant in 'a. This field ensures that our pointers are still
+ // valid.
+ marker: PhantomData<&'a Entry>,
+}
+
+impl<'a> Cursor<'a> {
+ /// Creates a cursor referencing a static empty TokenStream.
+ pub fn empty() -> Self {
+ // It's safe in this situation for us to put an `Entry` object in global
+ // storage, despite it not actually being safe to send across threads
+ // (`Ident` is a reference into a thread-local table). This is because
+ // this entry never includes a `Ident` object.
+ //
+ // This wrapper struct allows us to break the rules and put a `Sync`
+ // object in global storage.
+ struct UnsafeSyncEntry(Entry);
+ unsafe impl Sync for UnsafeSyncEntry {}
+ static EMPTY_ENTRY: UnsafeSyncEntry = UnsafeSyncEntry(Entry::End(0));
+
+ Cursor {
+ ptr: &EMPTY_ENTRY.0,
+ scope: &EMPTY_ENTRY.0,
+ marker: PhantomData,
+ }
+ }
+
+ /// This create method intelligently exits non-explicitly-entered
+ /// `None`-delimited scopes when the cursor reaches the end of them,
+ /// allowing for them to be treated transparently.
+ unsafe fn create(mut ptr: *const Entry, scope: *const Entry) -> Self {
+ // NOTE: If we're looking at a `End`, we want to advance the cursor
+ // past it, unless `ptr == scope`, which means that we're at the edge of
+ // our cursor's scope. We should only have `ptr != scope` at the exit
+ // from None-delimited groups entered with `ignore_none`.
+ while let Entry::End(_) = *ptr {
+ if ptr == scope {
+ break;
+ }
+ ptr = ptr.add(1);
+ }
+
+ Cursor {
+ ptr,
+ scope,
+ marker: PhantomData,
+ }
+ }
+
+ /// Get the current entry.
+ fn entry(self) -> &'a Entry {
+ unsafe { &*self.ptr }
+ }
+
+ /// Bump the cursor to point at the next token after the current one. This
+ /// is undefined behavior if the cursor is currently looking at an
+ /// `Entry::End`.
+ ///
+ /// If the cursor is looking at an `Entry::Group`, the bumped cursor will
+ /// point at the first token in the group (with the same scope end).
+ unsafe fn bump_ignore_group(self) -> Cursor<'a> {
+ Cursor::create(self.ptr.offset(1), self.scope)
+ }
+
+ /// While the cursor is looking at a `None`-delimited group, move it to look
+ /// at the first token inside instead. If the group is empty, this will move
+ /// the cursor past the `None`-delimited group.
+ ///
+ /// WARNING: This mutates its argument.
+ fn ignore_none(&mut self) {
+ while let Entry::Group(group, _) = self.entry() {
+ if group.delimiter() == Delimiter::None {
+ unsafe { *self = self.bump_ignore_group() };
+ } else {
+ break;
+ }
+ }
+ }
+
+ /// Checks whether the cursor is currently pointing at the end of its valid
+ /// scope.
+ pub fn eof(self) -> bool {
+ // We're at eof if we're at the end of our scope.
+ self.ptr == self.scope
+ }
+
+ /// If the cursor is pointing at a `Group` with the given delimiter, returns
+ /// a cursor into that group and one pointing to the next `TokenTree`.
+ pub fn group(mut self, delim: Delimiter) -> Option<(Cursor<'a>, Span, Cursor<'a>)> {
+ // If we're not trying to enter a none-delimited group, we want to
+ // ignore them. We have to make sure to _not_ ignore them when we want
+ // to enter them, of course. For obvious reasons.
+ if delim != Delimiter::None {
+ self.ignore_none();
+ }
+
+ if let Entry::Group(group, end_offset) = self.entry() {
+ if group.delimiter() == delim {
+ let end_of_group = unsafe { self.ptr.add(*end_offset) };
+ let inside_of_group = unsafe { Cursor::create(self.ptr.add(1), end_of_group) };
+ let after_group = unsafe { Cursor::create(end_of_group, self.scope) };
+ return Some((inside_of_group, group.span(), after_group));
+ }
+ }
+
+ None
+ }
+
+ /// If the cursor is pointing at a `Ident`, returns it along with a cursor
+ /// pointing at the next `TokenTree`.
+ pub fn ident(mut self) -> Option<(Ident, Cursor<'a>)> {
+ self.ignore_none();
+ match self.entry() {
+ Entry::Ident(ident) => Some((ident.clone(), unsafe { self.bump_ignore_group() })),
+ _ => None,
+ }
+ }
+
+ /// If the cursor is pointing at a `Punct`, returns it along with a cursor
+ /// pointing at the next `TokenTree`.
+ pub fn punct(mut self) -> Option<(Punct, Cursor<'a>)> {
+ self.ignore_none();
+ match self.entry() {
+ Entry::Punct(punct) if punct.as_char() != '\'' => {
+ Some((punct.clone(), unsafe { self.bump_ignore_group() }))
+ }
+ _ => None,
+ }
+ }
+
+ /// If the cursor is pointing at a `Literal`, return it along with a cursor
+ /// pointing at the next `TokenTree`.
+ pub fn literal(mut self) -> Option<(Literal, Cursor<'a>)> {
+ self.ignore_none();
+ match self.entry() {
+ Entry::Literal(literal) => Some((literal.clone(), unsafe { self.bump_ignore_group() })),
+ _ => None,
+ }
+ }
+
+ /// If the cursor is pointing at a `Lifetime`, returns it along with a
+ /// cursor pointing at the next `TokenTree`.
+ pub fn lifetime(mut self) -> Option<(Lifetime, Cursor<'a>)> {
+ self.ignore_none();
+ match self.entry() {
+ Entry::Punct(punct) if punct.as_char() == '\'' && punct.spacing() == Spacing::Joint => {
+ let next = unsafe { self.bump_ignore_group() };
+ let (ident, rest) = next.ident()?;
+ let lifetime = Lifetime {
+ apostrophe: punct.span(),
+ ident,
+ };
+ Some((lifetime, rest))
+ }
+ _ => None,
+ }
+ }
+
+ /// Copies all remaining tokens visible from this cursor into a
+ /// `TokenStream`.
+ pub fn token_stream(self) -> TokenStream {
+ let mut tts = Vec::new();
+ let mut cursor = self;
+ while let Some((tt, rest)) = cursor.token_tree() {
+ tts.push(tt);
+ cursor = rest;
+ }
+ tts.into_iter().collect()
+ }
+
+ /// If the cursor is pointing at a `TokenTree`, returns it along with a
+ /// cursor pointing at the next `TokenTree`.
+ ///
+ /// Returns `None` if the cursor has reached the end of its stream.
+ ///
+ /// This method does not treat `None`-delimited groups as transparent, and
+ /// will return a `Group(None, ..)` if the cursor is looking at one.
+ pub fn token_tree(self) -> Option<(TokenTree, Cursor<'a>)> {
+ let (tree, len) = match self.entry() {
+ Entry::Group(group, end_offset) => (group.clone().into(), *end_offset),
+ Entry::Literal(literal) => (literal.clone().into(), 1),
+ Entry::Ident(ident) => (ident.clone().into(), 1),
+ Entry::Punct(punct) => (punct.clone().into(), 1),
+ Entry::End(_) => return None,
+ };
+
+ let rest = unsafe { Cursor::create(self.ptr.add(len), self.scope) };
+ Some((tree, rest))
+ }
+
+ /// Returns the `Span` of the current token, or `Span::call_site()` if this
+ /// cursor points to eof.
+ pub fn span(self) -> Span {
+ match self.entry() {
+ Entry::Group(group, _) => group.span(),
+ Entry::Literal(literal) => literal.span(),
+ Entry::Ident(ident) => ident.span(),
+ Entry::Punct(punct) => punct.span(),
+ Entry::End(_) => Span::call_site(),
+ }
+ }
+
+ /// Skip over the next token without cloning it. Returns `None` if this
+ /// cursor points to eof.
+ ///
+ /// This method treats `'lifetimes` as a single token.
+ pub(crate) fn skip(self) -> Option<Cursor<'a>> {
+ let len = match self.entry() {
+ Entry::End(_) => return None,
+
+ // Treat lifetimes as a single tt for the purposes of 'skip'.
+ Entry::Punct(punct) if punct.as_char() == '\'' && punct.spacing() == Spacing::Joint => {
+ match unsafe { &*self.ptr.add(1) } {
+ Entry::Ident(_) => 2,
+ _ => 1,
+ }
+ }
+
+ Entry::Group(_, end_offset) => *end_offset,
+ _ => 1,
+ };
+
+ Some(unsafe { Cursor::create(self.ptr.add(len), self.scope) })
+ }
+}
+
+impl<'a> Copy for Cursor<'a> {}
+
+impl<'a> Clone for Cursor<'a> {
+ fn clone(&self) -> Self {
+ *self
+ }
+}
+
+impl<'a> Eq for Cursor<'a> {}
+
+impl<'a> PartialEq for Cursor<'a> {
+ fn eq(&self, other: &Self) -> bool {
+ self.ptr == other.ptr
+ }
+}
+
+impl<'a> PartialOrd for Cursor<'a> {
+ fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+ if same_buffer(*self, *other) {
+ Some(self.ptr.cmp(&other.ptr))
+ } else {
+ None
+ }
+ }
+}
+
+pub(crate) fn same_scope(a: Cursor, b: Cursor) -> bool {
+ a.scope == b.scope
+}
+
+pub(crate) fn same_buffer(a: Cursor, b: Cursor) -> bool {
+ unsafe {
+ match (&*a.scope, &*b.scope) {
+ (Entry::End(a_offset), Entry::End(b_offset)) => {
+ a.scope.offset(*a_offset) == b.scope.offset(*b_offset)
+ }
+ _ => unreachable!(),
+ }
+ }
+}
+
+#[cfg(any(feature = "full", feature = "derive"))]
+pub(crate) fn cmp_assuming_same_buffer(a: Cursor, b: Cursor) -> Ordering {
+ a.ptr.cmp(&b.ptr)
+}
+
+pub(crate) fn open_span_of_group(cursor: Cursor) -> Span {
+ match cursor.entry() {
+ Entry::Group(group, _) => group.span_open(),
+ _ => cursor.span(),
+ }
+}
+
+pub(crate) fn close_span_of_group(cursor: Cursor) -> Span {
+ match cursor.entry() {
+ Entry::Group(group, _) => group.span_close(),
+ _ => cursor.span(),
+ }
+}
diff --git a/third_party/rust/syn/src/custom_keyword.rs b/third_party/rust/syn/src/custom_keyword.rs
new file mode 100644
index 0000000000..a3ec9d4cb7
--- /dev/null
+++ b/third_party/rust/syn/src/custom_keyword.rs
@@ -0,0 +1,253 @@
+/// Define a type that supports parsing and printing a given identifier as if it
+/// were a keyword.
+///
+/// # Usage
+///
+/// As a convention, it is recommended that this macro be invoked within a
+/// module called `kw` or `keyword` and that the resulting parser be invoked
+/// with a `kw::` or `keyword::` prefix.
+///
+/// ```
+/// mod kw {
+/// syn::custom_keyword!(whatever);
+/// }
+/// ```
+///
+/// The generated syntax tree node supports the following operations just like
+/// any built-in keyword token.
+///
+/// - [Peeking] — `input.peek(kw::whatever)`
+///
+/// - [Parsing] — `input.parse::<kw::whatever>()?`
+///
+/// - [Printing] — `quote!( ... #whatever_token ... )`
+///
+/// - Construction from a [`Span`] — `let whatever_token = kw::whatever(sp)`
+///
+/// - Field access to its span — `let sp = whatever_token.span`
+///
+/// [Peeking]: crate::parse::ParseBuffer::peek
+/// [Parsing]: crate::parse::ParseBuffer::parse
+/// [Printing]: quote::ToTokens
+/// [`Span`]: proc_macro2::Span
+///
+/// # Example
+///
+/// This example parses input that looks like `bool = true` or `str = "value"`.
+/// The key must be either the identifier `bool` or the identifier `str`. If
+/// `bool`, the value may be either `true` or `false`. If `str`, the value may
+/// be any string literal.
+///
+/// The symbols `bool` and `str` are not reserved keywords in Rust so these are
+/// not considered keywords in the `syn::token` module. Like any other
+/// identifier that is not a keyword, these can be declared as custom keywords
+/// by crates that need to use them as such.
+///
+/// ```
+/// use syn::{LitBool, LitStr, Result, Token};
+/// use syn::parse::{Parse, ParseStream};
+///
+/// mod kw {
+/// syn::custom_keyword!(bool);
+/// syn::custom_keyword!(str);
+/// }
+///
+/// enum Argument {
+/// Bool {
+/// bool_token: kw::bool,
+/// eq_token: Token![=],
+/// value: LitBool,
+/// },
+/// Str {
+/// str_token: kw::str,
+/// eq_token: Token![=],
+/// value: LitStr,
+/// },
+/// }
+///
+/// impl Parse for Argument {
+/// fn parse(input: ParseStream) -> Result<Self> {
+/// let lookahead = input.lookahead1();
+/// if lookahead.peek(kw::bool) {
+/// Ok(Argument::Bool {
+/// bool_token: input.parse::<kw::bool>()?,
+/// eq_token: input.parse()?,
+/// value: input.parse()?,
+/// })
+/// } else if lookahead.peek(kw::str) {
+/// Ok(Argument::Str {
+/// str_token: input.parse::<kw::str>()?,
+/// eq_token: input.parse()?,
+/// value: input.parse()?,
+/// })
+/// } else {
+/// Err(lookahead.error())
+/// }
+/// }
+/// }
+/// ```
+#[macro_export]
+macro_rules! custom_keyword {
+ ($ident:ident) => {
+ #[allow(non_camel_case_types)]
+ pub struct $ident {
+ pub span: $crate::__private::Span,
+ }
+
+ #[doc(hidden)]
+ #[allow(dead_code, non_snake_case)]
+ pub fn $ident<__S: $crate::__private::IntoSpans<[$crate::__private::Span; 1]>>(
+ span: __S,
+ ) -> $ident {
+ $ident {
+ span: $crate::__private::IntoSpans::into_spans(span)[0],
+ }
+ }
+
+ impl $crate::__private::Default for $ident {
+ fn default() -> Self {
+ $ident {
+ span: $crate::__private::Span::call_site(),
+ }
+ }
+ }
+
+ $crate::impl_parse_for_custom_keyword!($ident);
+ $crate::impl_to_tokens_for_custom_keyword!($ident);
+ $crate::impl_clone_for_custom_keyword!($ident);
+ $crate::impl_extra_traits_for_custom_keyword!($ident);
+ };
+}
+
+// Not public API.
+#[cfg(feature = "parsing")]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_parse_for_custom_keyword {
+ ($ident:ident) => {
+ // For peek.
+ impl $crate::token::CustomToken for $ident {
+ fn peek(cursor: $crate::buffer::Cursor) -> $crate::__private::bool {
+ if let $crate::__private::Some((ident, _rest)) = cursor.ident() {
+ ident == stringify!($ident)
+ } else {
+ false
+ }
+ }
+
+ fn display() -> &'static $crate::__private::str {
+ concat!("`", stringify!($ident), "`")
+ }
+ }
+
+ impl $crate::parse::Parse for $ident {
+ fn parse(input: $crate::parse::ParseStream) -> $crate::parse::Result<$ident> {
+ input.step(|cursor| {
+ if let $crate::__private::Some((ident, rest)) = cursor.ident() {
+ if ident == stringify!($ident) {
+ return $crate::__private::Ok(($ident { span: ident.span() }, rest));
+ }
+ }
+ $crate::__private::Err(cursor.error(concat!(
+ "expected `",
+ stringify!($ident),
+ "`"
+ )))
+ })
+ }
+ }
+ };
+}
+
+// Not public API.
+#[cfg(not(feature = "parsing"))]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_parse_for_custom_keyword {
+ ($ident:ident) => {};
+}
+
+// Not public API.
+#[cfg(feature = "printing")]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_to_tokens_for_custom_keyword {
+ ($ident:ident) => {
+ impl $crate::__private::ToTokens for $ident {
+ fn to_tokens(&self, tokens: &mut $crate::__private::TokenStream2) {
+ let ident = $crate::Ident::new(stringify!($ident), self.span);
+ $crate::__private::TokenStreamExt::append(tokens, ident);
+ }
+ }
+ };
+}
+
+// Not public API.
+#[cfg(not(feature = "printing"))]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_to_tokens_for_custom_keyword {
+ ($ident:ident) => {};
+}
+
+// Not public API.
+#[cfg(feature = "clone-impls")]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_clone_for_custom_keyword {
+ ($ident:ident) => {
+ impl $crate::__private::Copy for $ident {}
+
+ #[allow(clippy::expl_impl_clone_on_copy)]
+ impl $crate::__private::Clone for $ident {
+ fn clone(&self) -> Self {
+ *self
+ }
+ }
+ };
+}
+
+// Not public API.
+#[cfg(not(feature = "clone-impls"))]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_clone_for_custom_keyword {
+ ($ident:ident) => {};
+}
+
+// Not public API.
+#[cfg(feature = "extra-traits")]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_extra_traits_for_custom_keyword {
+ ($ident:ident) => {
+ impl $crate::__private::Debug for $ident {
+ fn fmt(&self, f: &mut $crate::__private::Formatter) -> $crate::__private::fmt::Result {
+ $crate::__private::Formatter::write_str(
+ f,
+ concat!("Keyword [", stringify!($ident), "]"),
+ )
+ }
+ }
+
+ impl $crate::__private::Eq for $ident {}
+
+ impl $crate::__private::PartialEq for $ident {
+ fn eq(&self, _other: &Self) -> $crate::__private::bool {
+ true
+ }
+ }
+
+ impl $crate::__private::Hash for $ident {
+ fn hash<__H: $crate::__private::Hasher>(&self, _state: &mut __H) {}
+ }
+ };
+}
+
+// Not public API.
+#[cfg(not(feature = "extra-traits"))]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_extra_traits_for_custom_keyword {
+ ($ident:ident) => {};
+}
diff --git a/third_party/rust/syn/src/custom_punctuation.rs b/third_party/rust/syn/src/custom_punctuation.rs
new file mode 100644
index 0000000000..118a8453da
--- /dev/null
+++ b/third_party/rust/syn/src/custom_punctuation.rs
@@ -0,0 +1,300 @@
+/// Define a type that supports parsing and printing a multi-character symbol
+/// as if it were a punctuation token.
+///
+/// # Usage
+///
+/// ```
+/// syn::custom_punctuation!(LeftRightArrow, <=>);
+/// ```
+///
+/// The generated syntax tree node supports the following operations just like
+/// any built-in punctuation token.
+///
+/// - [Peeking] — `input.peek(LeftRightArrow)`
+///
+/// - [Parsing] — `input.parse::<LeftRightArrow>()?`
+///
+/// - [Printing] — `quote!( ... #lrarrow ... )`
+///
+/// - Construction from a [`Span`] — `let lrarrow = LeftRightArrow(sp)`
+///
+/// - Construction from multiple [`Span`] — `let lrarrow = LeftRightArrow([sp, sp, sp])`
+///
+/// - Field access to its spans — `let spans = lrarrow.spans`
+///
+/// [Peeking]: crate::parse::ParseBuffer::peek
+/// [Parsing]: crate::parse::ParseBuffer::parse
+/// [Printing]: quote::ToTokens
+/// [`Span`]: proc_macro2::Span
+///
+/// # Example
+///
+/// ```
+/// use proc_macro2::{TokenStream, TokenTree};
+/// use syn::parse::{Parse, ParseStream, Peek, Result};
+/// use syn::punctuated::Punctuated;
+/// use syn::Expr;
+///
+/// syn::custom_punctuation!(PathSeparator, </>);
+///
+/// // expr </> expr </> expr ...
+/// struct PathSegments {
+/// segments: Punctuated<Expr, PathSeparator>,
+/// }
+///
+/// impl Parse for PathSegments {
+/// fn parse(input: ParseStream) -> Result<Self> {
+/// let mut segments = Punctuated::new();
+///
+/// let first = parse_until(input, PathSeparator)?;
+/// segments.push_value(syn::parse2(first)?);
+///
+/// while input.peek(PathSeparator) {
+/// segments.push_punct(input.parse()?);
+///
+/// let next = parse_until(input, PathSeparator)?;
+/// segments.push_value(syn::parse2(next)?);
+/// }
+///
+/// Ok(PathSegments { segments })
+/// }
+/// }
+///
+/// fn parse_until<E: Peek>(input: ParseStream, end: E) -> Result<TokenStream> {
+/// let mut tokens = TokenStream::new();
+/// while !input.is_empty() && !input.peek(end) {
+/// let next: TokenTree = input.parse()?;
+/// tokens.extend(Some(next));
+/// }
+/// Ok(tokens)
+/// }
+///
+/// fn main() {
+/// let input = r#" a::b </> c::d::e "#;
+/// let _: PathSegments = syn::parse_str(input).unwrap();
+/// }
+/// ```
+#[macro_export]
+macro_rules! custom_punctuation {
+ ($ident:ident, $($tt:tt)+) => {
+ pub struct $ident {
+ pub spans: $crate::custom_punctuation_repr!($($tt)+),
+ }
+
+ #[doc(hidden)]
+ #[allow(dead_code, non_snake_case)]
+ pub fn $ident<__S: $crate::__private::IntoSpans<$crate::custom_punctuation_repr!($($tt)+)>>(
+ spans: __S,
+ ) -> $ident {
+ let _validate_len = 0 $(+ $crate::custom_punctuation_len!(strict, $tt))*;
+ $ident {
+ spans: $crate::__private::IntoSpans::into_spans(spans)
+ }
+ }
+
+ impl $crate::__private::Default for $ident {
+ fn default() -> Self {
+ $ident($crate::__private::Span::call_site())
+ }
+ }
+
+ $crate::impl_parse_for_custom_punctuation!($ident, $($tt)+);
+ $crate::impl_to_tokens_for_custom_punctuation!($ident, $($tt)+);
+ $crate::impl_clone_for_custom_punctuation!($ident, $($tt)+);
+ $crate::impl_extra_traits_for_custom_punctuation!($ident, $($tt)+);
+ };
+}
+
+// Not public API.
+#[cfg(feature = "parsing")]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_parse_for_custom_punctuation {
+ ($ident:ident, $($tt:tt)+) => {
+ impl $crate::token::CustomToken for $ident {
+ fn peek(cursor: $crate::buffer::Cursor) -> bool {
+ $crate::token::parsing::peek_punct(cursor, $crate::stringify_punct!($($tt)+))
+ }
+
+ fn display() -> &'static $crate::__private::str {
+ concat!("`", $crate::stringify_punct!($($tt)+), "`")
+ }
+ }
+
+ impl $crate::parse::Parse for $ident {
+ fn parse(input: $crate::parse::ParseStream) -> $crate::parse::Result<$ident> {
+ let spans: $crate::custom_punctuation_repr!($($tt)+) =
+ $crate::token::parsing::punct(input, $crate::stringify_punct!($($tt)+))?;
+ Ok($ident(spans))
+ }
+ }
+ };
+}
+
+// Not public API.
+#[cfg(not(feature = "parsing"))]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_parse_for_custom_punctuation {
+ ($ident:ident, $($tt:tt)+) => {};
+}
+
+// Not public API.
+#[cfg(feature = "printing")]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_to_tokens_for_custom_punctuation {
+ ($ident:ident, $($tt:tt)+) => {
+ impl $crate::__private::ToTokens for $ident {
+ fn to_tokens(&self, tokens: &mut $crate::__private::TokenStream2) {
+ $crate::token::printing::punct($crate::stringify_punct!($($tt)+), &self.spans, tokens)
+ }
+ }
+ };
+}
+
+// Not public API.
+#[cfg(not(feature = "printing"))]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_to_tokens_for_custom_punctuation {
+ ($ident:ident, $($tt:tt)+) => {};
+}
+
+// Not public API.
+#[cfg(feature = "clone-impls")]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_clone_for_custom_punctuation {
+ ($ident:ident, $($tt:tt)+) => {
+ impl $crate::__private::Copy for $ident {}
+
+ #[allow(clippy::expl_impl_clone_on_copy)]
+ impl $crate::__private::Clone for $ident {
+ fn clone(&self) -> Self {
+ *self
+ }
+ }
+ };
+}
+
+// Not public API.
+#[cfg(not(feature = "clone-impls"))]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_clone_for_custom_punctuation {
+ ($ident:ident, $($tt:tt)+) => {};
+}
+
+// Not public API.
+#[cfg(feature = "extra-traits")]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_extra_traits_for_custom_punctuation {
+ ($ident:ident, $($tt:tt)+) => {
+ impl $crate::__private::Debug for $ident {
+ fn fmt(&self, f: &mut $crate::__private::Formatter) -> $crate::__private::fmt::Result {
+ $crate::__private::Formatter::write_str(f, stringify!($ident))
+ }
+ }
+
+ impl $crate::__private::Eq for $ident {}
+
+ impl $crate::__private::PartialEq for $ident {
+ fn eq(&self, _other: &Self) -> $crate::__private::bool {
+ true
+ }
+ }
+
+ impl $crate::__private::Hash for $ident {
+ fn hash<__H: $crate::__private::Hasher>(&self, _state: &mut __H) {}
+ }
+ };
+}
+
+// Not public API.
+#[cfg(not(feature = "extra-traits"))]
+#[doc(hidden)]
+#[macro_export]
+macro_rules! impl_extra_traits_for_custom_punctuation {
+ ($ident:ident, $($tt:tt)+) => {};
+}
+
+// Not public API.
+#[doc(hidden)]
+#[macro_export]
+macro_rules! custom_punctuation_repr {
+ ($($tt:tt)+) => {
+ [$crate::__private::Span; 0 $(+ $crate::custom_punctuation_len!(lenient, $tt))+]
+ };
+}
+
+// Not public API.
+#[doc(hidden)]
+#[macro_export]
+#[rustfmt::skip]
+macro_rules! custom_punctuation_len {
+ ($mode:ident, +) => { 1 };
+ ($mode:ident, +=) => { 2 };
+ ($mode:ident, &) => { 1 };
+ ($mode:ident, &&) => { 2 };
+ ($mode:ident, &=) => { 2 };
+ ($mode:ident, @) => { 1 };
+ ($mode:ident, !) => { 1 };
+ ($mode:ident, ^) => { 1 };
+ ($mode:ident, ^=) => { 2 };
+ ($mode:ident, :) => { 1 };
+ ($mode:ident, ::) => { 2 };
+ ($mode:ident, ,) => { 1 };
+ ($mode:ident, /) => { 1 };
+ ($mode:ident, /=) => { 2 };
+ ($mode:ident, .) => { 1 };
+ ($mode:ident, ..) => { 2 };
+ ($mode:ident, ...) => { 3 };
+ ($mode:ident, ..=) => { 3 };
+ ($mode:ident, =) => { 1 };
+ ($mode:ident, ==) => { 2 };
+ ($mode:ident, >=) => { 2 };
+ ($mode:ident, >) => { 1 };
+ ($mode:ident, <=) => { 2 };
+ ($mode:ident, <) => { 1 };
+ ($mode:ident, *=) => { 2 };
+ ($mode:ident, !=) => { 2 };
+ ($mode:ident, |) => { 1 };
+ ($mode:ident, |=) => { 2 };
+ ($mode:ident, ||) => { 2 };
+ ($mode:ident, #) => { 1 };
+ ($mode:ident, ?) => { 1 };
+ ($mode:ident, ->) => { 2 };
+ ($mode:ident, <-) => { 2 };
+ ($mode:ident, %) => { 1 };
+ ($mode:ident, %=) => { 2 };
+ ($mode:ident, =>) => { 2 };
+ ($mode:ident, ;) => { 1 };
+ ($mode:ident, <<) => { 2 };
+ ($mode:ident, <<=) => { 3 };
+ ($mode:ident, >>) => { 2 };
+ ($mode:ident, >>=) => { 3 };
+ ($mode:ident, *) => { 1 };
+ ($mode:ident, -) => { 1 };
+ ($mode:ident, -=) => { 2 };
+ ($mode:ident, ~) => { 1 };
+ (lenient, $tt:tt) => { 0 };
+ (strict, $tt:tt) => {{ $crate::custom_punctuation_unexpected!($tt); 0 }};
+}
+
+// Not public API.
+#[doc(hidden)]
+#[macro_export]
+macro_rules! custom_punctuation_unexpected {
+ () => {};
+}
+
+// Not public API.
+#[doc(hidden)]
+#[macro_export]
+macro_rules! stringify_punct {
+ ($($tt:tt)+) => {
+ concat!($(stringify!($tt)),+)
+ };
+}
diff --git a/third_party/rust/syn/src/data.rs b/third_party/rust/syn/src/data.rs
new file mode 100644
index 0000000000..3b466618f8
--- /dev/null
+++ b/third_party/rust/syn/src/data.rs
@@ -0,0 +1,493 @@
+use super::*;
+use crate::punctuated::Punctuated;
+
+ast_struct! {
+ /// An enum variant.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Variant {
+ /// Attributes tagged on the variant.
+ pub attrs: Vec<Attribute>,
+
+ /// Name of the variant.
+ pub ident: Ident,
+
+ /// Content stored in the variant.
+ pub fields: Fields,
+
+ /// Explicit discriminant: `Variant = 1`
+ pub discriminant: Option<(Token![=], Expr)>,
+ }
+}
+
+ast_enum_of_structs! {
+ /// Data stored within an enum variant or struct.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum Fields {
+ /// Named fields of a struct or struct variant such as `Point { x: f64,
+ /// y: f64 }`.
+ Named(FieldsNamed),
+
+ /// Unnamed fields of a tuple struct or tuple variant such as `Some(T)`.
+ Unnamed(FieldsUnnamed),
+
+ /// Unit struct or unit variant such as `None`.
+ Unit,
+ }
+}
+
+ast_struct! {
+ /// Named fields of a struct or struct variant such as `Point { x: f64,
+ /// y: f64 }`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct FieldsNamed {
+ pub brace_token: token::Brace,
+ pub named: Punctuated<Field, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// Unnamed fields of a tuple struct or tuple variant such as `Some(T)`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct FieldsUnnamed {
+ pub paren_token: token::Paren,
+ pub unnamed: Punctuated<Field, Token![,]>,
+ }
+}
+
+impl Fields {
+ /// Get an iterator over the borrowed [`Field`] items in this object. This
+ /// iterator can be used to iterate over a named or unnamed struct or
+ /// variant's fields uniformly.
+ pub fn iter(&self) -> punctuated::Iter<Field> {
+ match self {
+ Fields::Unit => crate::punctuated::empty_punctuated_iter(),
+ Fields::Named(f) => f.named.iter(),
+ Fields::Unnamed(f) => f.unnamed.iter(),
+ }
+ }
+
+ /// Get an iterator over the mutably borrowed [`Field`] items in this
+ /// object. This iterator can be used to iterate over a named or unnamed
+ /// struct or variant's fields uniformly.
+ pub fn iter_mut(&mut self) -> punctuated::IterMut<Field> {
+ match self {
+ Fields::Unit => crate::punctuated::empty_punctuated_iter_mut(),
+ Fields::Named(f) => f.named.iter_mut(),
+ Fields::Unnamed(f) => f.unnamed.iter_mut(),
+ }
+ }
+
+ /// Returns the number of fields.
+ pub fn len(&self) -> usize {
+ match self {
+ Fields::Unit => 0,
+ Fields::Named(f) => f.named.len(),
+ Fields::Unnamed(f) => f.unnamed.len(),
+ }
+ }
+
+ /// Returns `true` if there are zero fields.
+ pub fn is_empty(&self) -> bool {
+ match self {
+ Fields::Unit => true,
+ Fields::Named(f) => f.named.is_empty(),
+ Fields::Unnamed(f) => f.unnamed.is_empty(),
+ }
+ }
+}
+
+impl IntoIterator for Fields {
+ type Item = Field;
+ type IntoIter = punctuated::IntoIter<Field>;
+
+ fn into_iter(self) -> Self::IntoIter {
+ match self {
+ Fields::Unit => Punctuated::<Field, ()>::new().into_iter(),
+ Fields::Named(f) => f.named.into_iter(),
+ Fields::Unnamed(f) => f.unnamed.into_iter(),
+ }
+ }
+}
+
+impl<'a> IntoIterator for &'a Fields {
+ type Item = &'a Field;
+ type IntoIter = punctuated::Iter<'a, Field>;
+
+ fn into_iter(self) -> Self::IntoIter {
+ self.iter()
+ }
+}
+
+impl<'a> IntoIterator for &'a mut Fields {
+ type Item = &'a mut Field;
+ type IntoIter = punctuated::IterMut<'a, Field>;
+
+ fn into_iter(self) -> Self::IntoIter {
+ self.iter_mut()
+ }
+}
+
+ast_struct! {
+ /// A field of a struct or enum variant.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Field {
+ /// Attributes tagged on the field.
+ pub attrs: Vec<Attribute>,
+
+ /// Visibility of the field.
+ pub vis: Visibility,
+
+ /// Name of the field, if any.
+ ///
+ /// Fields of tuple structs have no names.
+ pub ident: Option<Ident>,
+
+ pub colon_token: Option<Token![:]>,
+
+ /// Type of the field.
+ pub ty: Type,
+ }
+}
+
+ast_enum_of_structs! {
+ /// The visibility level of an item: inherited or `pub` or
+ /// `pub(restricted)`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum Visibility {
+ /// A public visibility level: `pub`.
+ Public(VisPublic),
+
+ /// A crate-level visibility: `crate`.
+ Crate(VisCrate),
+
+ /// A visibility level restricted to some path: `pub(self)` or
+ /// `pub(super)` or `pub(crate)` or `pub(in some::module)`.
+ Restricted(VisRestricted),
+
+ /// An inherited visibility, which usually means private.
+ Inherited,
+ }
+}
+
+ast_struct! {
+ /// A public visibility level: `pub`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct VisPublic {
+ pub pub_token: Token![pub],
+ }
+}
+
+ast_struct! {
+ /// A crate-level visibility: `crate`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct VisCrate {
+ pub crate_token: Token![crate],
+ }
+}
+
+ast_struct! {
+ /// A visibility level restricted to some path: `pub(self)` or
+ /// `pub(super)` or `pub(crate)` or `pub(in some::module)`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct VisRestricted {
+ pub pub_token: Token![pub],
+ pub paren_token: token::Paren,
+ pub in_token: Option<Token![in]>,
+ pub path: Box<Path>,
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::ext::IdentExt;
+ use crate::parse::discouraged::Speculative;
+ use crate::parse::{Parse, ParseStream, Result};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Variant {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let _visibility: Visibility = input.parse()?;
+ let ident: Ident = input.parse()?;
+ let fields = if input.peek(token::Brace) {
+ Fields::Named(input.parse()?)
+ } else if input.peek(token::Paren) {
+ Fields::Unnamed(input.parse()?)
+ } else {
+ Fields::Unit
+ };
+ let discriminant = if input.peek(Token![=]) {
+ let eq_token: Token![=] = input.parse()?;
+ let discriminant: Expr = input.parse()?;
+ Some((eq_token, discriminant))
+ } else {
+ None
+ };
+ Ok(Variant {
+ attrs,
+ ident,
+ fields,
+ discriminant,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for FieldsNamed {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let content;
+ Ok(FieldsNamed {
+ brace_token: braced!(content in input),
+ named: content.parse_terminated(Field::parse_named)?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for FieldsUnnamed {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let content;
+ Ok(FieldsUnnamed {
+ paren_token: parenthesized!(content in input),
+ unnamed: content.parse_terminated(Field::parse_unnamed)?,
+ })
+ }
+ }
+
+ impl Field {
+ /// Parses a named (braced struct) field.
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_named(input: ParseStream) -> Result<Self> {
+ Ok(Field {
+ attrs: input.call(Attribute::parse_outer)?,
+ vis: input.parse()?,
+ ident: Some(if input.peek(Token![_]) {
+ input.call(Ident::parse_any)
+ } else {
+ input.parse()
+ }?),
+ colon_token: Some(input.parse()?),
+ ty: input.parse()?,
+ })
+ }
+
+ /// Parses an unnamed (tuple struct) field.
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_unnamed(input: ParseStream) -> Result<Self> {
+ Ok(Field {
+ attrs: input.call(Attribute::parse_outer)?,
+ vis: input.parse()?,
+ ident: None,
+ colon_token: None,
+ ty: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Visibility {
+ fn parse(input: ParseStream) -> Result<Self> {
+ // Recognize an empty None-delimited group, as produced by a $:vis
+ // matcher that matched no tokens.
+ if input.peek(token::Group) {
+ let ahead = input.fork();
+ let group = crate::group::parse_group(&ahead)?;
+ if group.content.is_empty() {
+ input.advance_to(&ahead);
+ return Ok(Visibility::Inherited);
+ }
+ }
+
+ if input.peek(Token![pub]) {
+ Self::parse_pub(input)
+ } else if input.peek(Token![crate]) {
+ Self::parse_crate(input)
+ } else {
+ Ok(Visibility::Inherited)
+ }
+ }
+ }
+
+ impl Visibility {
+ fn parse_pub(input: ParseStream) -> Result<Self> {
+ let pub_token = input.parse::<Token![pub]>()?;
+
+ if input.peek(token::Paren) {
+ let ahead = input.fork();
+
+ let content;
+ let paren_token = parenthesized!(content in ahead);
+ if content.peek(Token![crate])
+ || content.peek(Token![self])
+ || content.peek(Token![super])
+ {
+ let path = content.call(Ident::parse_any)?;
+
+ // Ensure there are no additional tokens within `content`.
+ // Without explicitly checking, we may misinterpret a tuple
+ // field as a restricted visibility, causing a parse error.
+ // e.g. `pub (crate::A, crate::B)` (Issue #720).
+ if content.is_empty() {
+ input.advance_to(&ahead);
+ return Ok(Visibility::Restricted(VisRestricted {
+ pub_token,
+ paren_token,
+ in_token: None,
+ path: Box::new(Path::from(path)),
+ }));
+ }
+ } else if content.peek(Token![in]) {
+ let in_token: Token![in] = content.parse()?;
+ let path = content.call(Path::parse_mod_style)?;
+
+ input.advance_to(&ahead);
+ return Ok(Visibility::Restricted(VisRestricted {
+ pub_token,
+ paren_token,
+ in_token: Some(in_token),
+ path: Box::new(path),
+ }));
+ }
+ }
+
+ Ok(Visibility::Public(VisPublic { pub_token }))
+ }
+
+ fn parse_crate(input: ParseStream) -> Result<Self> {
+ if input.peek2(Token![::]) {
+ Ok(Visibility::Inherited)
+ } else {
+ Ok(Visibility::Crate(VisCrate {
+ crate_token: input.parse()?,
+ }))
+ }
+ }
+
+ #[cfg(feature = "full")]
+ pub(crate) fn is_some(&self) -> bool {
+ match self {
+ Visibility::Inherited => false,
+ _ => true,
+ }
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use crate::print::TokensOrDefault;
+ use proc_macro2::TokenStream;
+ use quote::{ToTokens, TokenStreamExt};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Variant {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(&self.attrs);
+ self.ident.to_tokens(tokens);
+ self.fields.to_tokens(tokens);
+ if let Some((eq_token, disc)) = &self.discriminant {
+ eq_token.to_tokens(tokens);
+ disc.to_tokens(tokens);
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for FieldsNamed {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.brace_token.surround(tokens, |tokens| {
+ self.named.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for FieldsUnnamed {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.paren_token.surround(tokens, |tokens| {
+ self.unnamed.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Field {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(&self.attrs);
+ self.vis.to_tokens(tokens);
+ if let Some(ident) = &self.ident {
+ ident.to_tokens(tokens);
+ TokensOrDefault(&self.colon_token).to_tokens(tokens);
+ }
+ self.ty.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for VisPublic {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.pub_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for VisCrate {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.crate_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for VisRestricted {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.pub_token.to_tokens(tokens);
+ self.paren_token.surround(tokens, |tokens| {
+ // TODO: If we have a path which is not "self" or "super" or
+ // "crate", automatically add the "in" token.
+ self.in_token.to_tokens(tokens);
+ self.path.to_tokens(tokens);
+ });
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/derive.rs b/third_party/rust/syn/src/derive.rs
new file mode 100644
index 0000000000..af9bb91b7a
--- /dev/null
+++ b/third_party/rust/syn/src/derive.rs
@@ -0,0 +1,274 @@
+use super::*;
+use crate::punctuated::Punctuated;
+
+ast_struct! {
+ /// Data structure sent to a `proc_macro_derive` macro.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "derive")))]
+ pub struct DeriveInput {
+ /// Attributes tagged on the whole struct or enum.
+ pub attrs: Vec<Attribute>,
+
+ /// Visibility of the struct or enum.
+ pub vis: Visibility,
+
+ /// Name of the struct or enum.
+ pub ident: Ident,
+
+ /// Generics required to complete the definition.
+ pub generics: Generics,
+
+ /// Data within the struct or enum.
+ pub data: Data,
+ }
+}
+
+ast_enum_of_structs! {
+ /// The storage of a struct, enum or union data structure.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "derive")))]
+ pub enum Data {
+ /// A struct input to a `proc_macro_derive` macro.
+ Struct(DataStruct),
+
+ /// An enum input to a `proc_macro_derive` macro.
+ Enum(DataEnum),
+
+ /// An untagged union input to a `proc_macro_derive` macro.
+ Union(DataUnion),
+ }
+
+ do_not_generate_to_tokens
+}
+
+ast_struct! {
+ /// A struct input to a `proc_macro_derive` macro.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "derive")))]
+ pub struct DataStruct {
+ pub struct_token: Token![struct],
+ pub fields: Fields,
+ pub semi_token: Option<Token![;]>,
+ }
+}
+
+ast_struct! {
+ /// An enum input to a `proc_macro_derive` macro.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "derive")))]
+ pub struct DataEnum {
+ pub enum_token: Token![enum],
+ pub brace_token: token::Brace,
+ pub variants: Punctuated<Variant, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// An untagged union input to a `proc_macro_derive` macro.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "derive")))]
+ pub struct DataUnion {
+ pub union_token: Token![union],
+ pub fields: FieldsNamed,
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::parse::{Parse, ParseStream, Result};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for DeriveInput {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let vis = input.parse::<Visibility>()?;
+
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Token![struct]) {
+ let struct_token = input.parse::<Token![struct]>()?;
+ let ident = input.parse::<Ident>()?;
+ let generics = input.parse::<Generics>()?;
+ let (where_clause, fields, semi) = data_struct(input)?;
+ Ok(DeriveInput {
+ attrs,
+ vis,
+ ident,
+ generics: Generics {
+ where_clause,
+ ..generics
+ },
+ data: Data::Struct(DataStruct {
+ struct_token,
+ fields,
+ semi_token: semi,
+ }),
+ })
+ } else if lookahead.peek(Token![enum]) {
+ let enum_token = input.parse::<Token![enum]>()?;
+ let ident = input.parse::<Ident>()?;
+ let generics = input.parse::<Generics>()?;
+ let (where_clause, brace, variants) = data_enum(input)?;
+ Ok(DeriveInput {
+ attrs,
+ vis,
+ ident,
+ generics: Generics {
+ where_clause,
+ ..generics
+ },
+ data: Data::Enum(DataEnum {
+ enum_token,
+ brace_token: brace,
+ variants,
+ }),
+ })
+ } else if lookahead.peek(Token![union]) {
+ let union_token = input.parse::<Token![union]>()?;
+ let ident = input.parse::<Ident>()?;
+ let generics = input.parse::<Generics>()?;
+ let (where_clause, fields) = data_union(input)?;
+ Ok(DeriveInput {
+ attrs,
+ vis,
+ ident,
+ generics: Generics {
+ where_clause,
+ ..generics
+ },
+ data: Data::Union(DataUnion {
+ union_token,
+ fields,
+ }),
+ })
+ } else {
+ Err(lookahead.error())
+ }
+ }
+ }
+
+ pub fn data_struct(
+ input: ParseStream,
+ ) -> Result<(Option<WhereClause>, Fields, Option<Token![;]>)> {
+ let mut lookahead = input.lookahead1();
+ let mut where_clause = None;
+ if lookahead.peek(Token![where]) {
+ where_clause = Some(input.parse()?);
+ lookahead = input.lookahead1();
+ }
+
+ if where_clause.is_none() && lookahead.peek(token::Paren) {
+ let fields = input.parse()?;
+
+ lookahead = input.lookahead1();
+ if lookahead.peek(Token![where]) {
+ where_clause = Some(input.parse()?);
+ lookahead = input.lookahead1();
+ }
+
+ if lookahead.peek(Token![;]) {
+ let semi = input.parse()?;
+ Ok((where_clause, Fields::Unnamed(fields), Some(semi)))
+ } else {
+ Err(lookahead.error())
+ }
+ } else if lookahead.peek(token::Brace) {
+ let fields = input.parse()?;
+ Ok((where_clause, Fields::Named(fields), None))
+ } else if lookahead.peek(Token![;]) {
+ let semi = input.parse()?;
+ Ok((where_clause, Fields::Unit, Some(semi)))
+ } else {
+ Err(lookahead.error())
+ }
+ }
+
+ pub fn data_enum(
+ input: ParseStream,
+ ) -> Result<(
+ Option<WhereClause>,
+ token::Brace,
+ Punctuated<Variant, Token![,]>,
+ )> {
+ let where_clause = input.parse()?;
+
+ let content;
+ let brace = braced!(content in input);
+ let variants = content.parse_terminated(Variant::parse)?;
+
+ Ok((where_clause, brace, variants))
+ }
+
+ pub fn data_union(input: ParseStream) -> Result<(Option<WhereClause>, FieldsNamed)> {
+ let where_clause = input.parse()?;
+ let fields = input.parse()?;
+ Ok((where_clause, fields))
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use crate::attr::FilterAttrs;
+ use crate::print::TokensOrDefault;
+ use proc_macro2::TokenStream;
+ use quote::ToTokens;
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for DeriveInput {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ for attr in self.attrs.outer() {
+ attr.to_tokens(tokens);
+ }
+ self.vis.to_tokens(tokens);
+ match &self.data {
+ Data::Struct(d) => d.struct_token.to_tokens(tokens),
+ Data::Enum(d) => d.enum_token.to_tokens(tokens),
+ Data::Union(d) => d.union_token.to_tokens(tokens),
+ }
+ self.ident.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ match &self.data {
+ Data::Struct(data) => match &data.fields {
+ Fields::Named(fields) => {
+ self.generics.where_clause.to_tokens(tokens);
+ fields.to_tokens(tokens);
+ }
+ Fields::Unnamed(fields) => {
+ fields.to_tokens(tokens);
+ self.generics.where_clause.to_tokens(tokens);
+ TokensOrDefault(&data.semi_token).to_tokens(tokens);
+ }
+ Fields::Unit => {
+ self.generics.where_clause.to_tokens(tokens);
+ TokensOrDefault(&data.semi_token).to_tokens(tokens);
+ }
+ },
+ Data::Enum(data) => {
+ self.generics.where_clause.to_tokens(tokens);
+ data.brace_token.surround(tokens, |tokens| {
+ data.variants.to_tokens(tokens);
+ });
+ }
+ Data::Union(data) => {
+ self.generics.where_clause.to_tokens(tokens);
+ data.fields.to_tokens(tokens);
+ }
+ }
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/discouraged.rs b/third_party/rust/syn/src/discouraged.rs
new file mode 100644
index 0000000000..a46129b6a1
--- /dev/null
+++ b/third_party/rust/syn/src/discouraged.rs
@@ -0,0 +1,194 @@
+//! Extensions to the parsing API with niche applicability.
+
+use super::*;
+
+/// Extensions to the `ParseStream` API to support speculative parsing.
+pub trait Speculative {
+ /// Advance this parse stream to the position of a forked parse stream.
+ ///
+ /// This is the opposite operation to [`ParseStream::fork`]. You can fork a
+ /// parse stream, perform some speculative parsing, then join the original
+ /// stream to the fork to "commit" the parsing from the fork to the main
+ /// stream.
+ ///
+ /// If you can avoid doing this, you should, as it limits the ability to
+ /// generate useful errors. That said, it is often the only way to parse
+ /// syntax of the form `A* B*` for arbitrary syntax `A` and `B`. The problem
+ /// is that when the fork fails to parse an `A`, it's impossible to tell
+ /// whether that was because of a syntax error and the user meant to provide
+ /// an `A`, or that the `A`s are finished and it's time to start parsing
+ /// `B`s. Use with care.
+ ///
+ /// Also note that if `A` is a subset of `B`, `A* B*` can be parsed by
+ /// parsing `B*` and removing the leading members of `A` from the
+ /// repetition, bypassing the need to involve the downsides associated with
+ /// speculative parsing.
+ ///
+ /// [`ParseStream::fork`]: ParseBuffer::fork
+ ///
+ /// # Example
+ ///
+ /// There has been chatter about the possibility of making the colons in the
+ /// turbofish syntax like `path::to::<T>` no longer required by accepting
+ /// `path::to<T>` in expression position. Specifically, according to [RFC
+ /// 2544], [`PathSegment`] parsing should always try to consume a following
+ /// `<` token as the start of generic arguments, and reset to the `<` if
+ /// that fails (e.g. the token is acting as a less-than operator).
+ ///
+ /// This is the exact kind of parsing behavior which requires the "fork,
+ /// try, commit" behavior that [`ParseStream::fork`] discourages. With
+ /// `advance_to`, we can avoid having to parse the speculatively parsed
+ /// content a second time.
+ ///
+ /// This change in behavior can be implemented in syn by replacing just the
+ /// `Parse` implementation for `PathSegment`:
+ ///
+ /// ```
+ /// # use syn::ext::IdentExt;
+ /// use syn::parse::discouraged::Speculative;
+ /// # use syn::parse::{Parse, ParseStream};
+ /// # use syn::{Ident, PathArguments, Result, Token};
+ ///
+ /// pub struct PathSegment {
+ /// pub ident: Ident,
+ /// pub arguments: PathArguments,
+ /// }
+ /// #
+ /// # impl<T> From<T> for PathSegment
+ /// # where
+ /// # T: Into<Ident>,
+ /// # {
+ /// # fn from(ident: T) -> Self {
+ /// # PathSegment {
+ /// # ident: ident.into(),
+ /// # arguments: PathArguments::None,
+ /// # }
+ /// # }
+ /// # }
+ ///
+ /// impl Parse for PathSegment {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// if input.peek(Token![super])
+ /// || input.peek(Token![self])
+ /// || input.peek(Token![Self])
+ /// || input.peek(Token![crate])
+ /// {
+ /// let ident = input.call(Ident::parse_any)?;
+ /// return Ok(PathSegment::from(ident));
+ /// }
+ ///
+ /// let ident = input.parse()?;
+ /// if input.peek(Token![::]) && input.peek3(Token![<]) {
+ /// return Ok(PathSegment {
+ /// ident,
+ /// arguments: PathArguments::AngleBracketed(input.parse()?),
+ /// });
+ /// }
+ /// if input.peek(Token![<]) && !input.peek(Token![<=]) {
+ /// let fork = input.fork();
+ /// if let Ok(arguments) = fork.parse() {
+ /// input.advance_to(&fork);
+ /// return Ok(PathSegment {
+ /// ident,
+ /// arguments: PathArguments::AngleBracketed(arguments),
+ /// });
+ /// }
+ /// }
+ /// Ok(PathSegment::from(ident))
+ /// }
+ /// }
+ ///
+ /// # syn::parse_str::<PathSegment>("a<b,c>").unwrap();
+ /// ```
+ ///
+ /// # Drawbacks
+ ///
+ /// The main drawback of this style of speculative parsing is in error
+ /// presentation. Even if the lookahead is the "correct" parse, the error
+ /// that is shown is that of the "fallback" parse. To use the same example
+ /// as the turbofish above, take the following unfinished "turbofish":
+ ///
+ /// ```text
+ /// let _ = f<&'a fn(), for<'a> serde::>();
+ /// ```
+ ///
+ /// If this is parsed as generic arguments, we can provide the error message
+ ///
+ /// ```text
+ /// error: expected identifier
+ /// --> src.rs:L:C
+ /// |
+ /// L | let _ = f<&'a fn(), for<'a> serde::>();
+ /// | ^
+ /// ```
+ ///
+ /// but if parsed using the above speculative parsing, it falls back to
+ /// assuming that the `<` is a less-than when it fails to parse the generic
+ /// arguments, and tries to interpret the `&'a` as the start of a labelled
+ /// loop, resulting in the much less helpful error
+ ///
+ /// ```text
+ /// error: expected `:`
+ /// --> src.rs:L:C
+ /// |
+ /// L | let _ = f<&'a fn(), for<'a> serde::>();
+ /// | ^^
+ /// ```
+ ///
+ /// This can be mitigated with various heuristics (two examples: show both
+ /// forks' parse errors, or show the one that consumed more tokens), but
+ /// when you can control the grammar, sticking to something that can be
+ /// parsed LL(3) and without the LL(*) speculative parsing this makes
+ /// possible, displaying reasonable errors becomes much more simple.
+ ///
+ /// [RFC 2544]: https://github.com/rust-lang/rfcs/pull/2544
+ /// [`PathSegment`]: crate::PathSegment
+ ///
+ /// # Performance
+ ///
+ /// This method performs a cheap fixed amount of work that does not depend
+ /// on how far apart the two streams are positioned.
+ ///
+ /// # Panics
+ ///
+ /// The forked stream in the argument of `advance_to` must have been
+ /// obtained by forking `self`. Attempting to advance to any other stream
+ /// will cause a panic.
+ fn advance_to(&self, fork: &Self);
+}
+
+impl<'a> Speculative for ParseBuffer<'a> {
+ fn advance_to(&self, fork: &Self) {
+ if !crate::buffer::same_scope(self.cursor(), fork.cursor()) {
+ panic!("Fork was not derived from the advancing parse stream");
+ }
+
+ let (self_unexp, self_sp) = inner_unexpected(self);
+ let (fork_unexp, fork_sp) = inner_unexpected(fork);
+ if !Rc::ptr_eq(&self_unexp, &fork_unexp) {
+ match (fork_sp, self_sp) {
+ // Unexpected set on the fork, but not on `self`, copy it over.
+ (Some(span), None) => {
+ self_unexp.set(Unexpected::Some(span));
+ }
+ // Unexpected unset. Use chain to propagate errors from fork.
+ (None, None) => {
+ fork_unexp.set(Unexpected::Chain(self_unexp));
+
+ // Ensure toplevel 'unexpected' tokens from the fork don't
+ // bubble up the chain by replacing the root `unexpected`
+ // pointer, only 'unexpected' tokens from existing group
+ // parsers should bubble.
+ fork.unexpected
+ .set(Some(Rc::new(Cell::new(Unexpected::None))));
+ }
+ // Unexpected has been set on `self`. No changes needed.
+ (_, Some(_)) => {}
+ }
+ }
+
+ // See comment on `cell` in the struct definition.
+ self.cell
+ .set(unsafe { mem::transmute::<Cursor, Cursor<'static>>(fork.cursor()) });
+ }
+}
diff --git a/third_party/rust/syn/src/drops.rs b/third_party/rust/syn/src/drops.rs
new file mode 100644
index 0000000000..89b42d82ef
--- /dev/null
+++ b/third_party/rust/syn/src/drops.rs
@@ -0,0 +1,58 @@
+use std::iter;
+use std::mem::ManuallyDrop;
+use std::ops::{Deref, DerefMut};
+use std::option;
+use std::slice;
+
+#[repr(transparent)]
+pub(crate) struct NoDrop<T: ?Sized>(ManuallyDrop<T>);
+
+impl<T> NoDrop<T> {
+ pub(crate) fn new(value: T) -> Self
+ where
+ T: TrivialDrop,
+ {
+ NoDrop(ManuallyDrop::new(value))
+ }
+}
+
+impl<T: ?Sized> Deref for NoDrop<T> {
+ type Target = T;
+ fn deref(&self) -> &Self::Target {
+ &self.0
+ }
+}
+
+impl<T: ?Sized> DerefMut for NoDrop<T> {
+ fn deref_mut(&mut self) -> &mut Self::Target {
+ &mut self.0
+ }
+}
+
+pub(crate) trait TrivialDrop {}
+
+impl<T> TrivialDrop for iter::Empty<T> {}
+impl<'a, T> TrivialDrop for slice::Iter<'a, T> {}
+impl<'a, T> TrivialDrop for slice::IterMut<'a, T> {}
+impl<'a, T> TrivialDrop for option::IntoIter<&'a T> {}
+impl<'a, T> TrivialDrop for option::IntoIter<&'a mut T> {}
+
+#[test]
+fn test_needs_drop() {
+ use std::mem::needs_drop;
+
+ struct NeedsDrop;
+
+ impl Drop for NeedsDrop {
+ fn drop(&mut self) {}
+ }
+
+ assert!(needs_drop::<NeedsDrop>());
+
+ // Test each of the types with a handwritten TrivialDrop impl above.
+ assert!(!needs_drop::<iter::Empty<NeedsDrop>>());
+ assert!(!needs_drop::<slice::Iter<NeedsDrop>>());
+ assert!(!needs_drop::<slice::IterMut<NeedsDrop>>());
+ assert!(!needs_drop::<option::IntoIter<&NeedsDrop>>());
+ assert!(!needs_drop::<option::IntoIter<&mut NeedsDrop>>());
+}
diff --git a/third_party/rust/syn/src/error.rs b/third_party/rust/syn/src/error.rs
new file mode 100644
index 0000000000..e301367d5e
--- /dev/null
+++ b/third_party/rust/syn/src/error.rs
@@ -0,0 +1,428 @@
+#[cfg(feature = "parsing")]
+use crate::buffer::Cursor;
+use crate::thread::ThreadBound;
+use proc_macro2::{
+ Delimiter, Group, Ident, LexError, Literal, Punct, Spacing, Span, TokenStream, TokenTree,
+};
+#[cfg(feature = "printing")]
+use quote::ToTokens;
+use std::fmt::{self, Debug, Display};
+use std::iter::FromIterator;
+use std::slice;
+use std::vec;
+
+/// The result of a Syn parser.
+pub type Result<T> = std::result::Result<T, Error>;
+
+/// Error returned when a Syn parser cannot parse the input tokens.
+///
+/// # Error reporting in proc macros
+///
+/// The correct way to report errors back to the compiler from a procedural
+/// macro is by emitting an appropriately spanned invocation of
+/// [`compile_error!`] in the generated code. This produces a better diagnostic
+/// message than simply panicking the macro.
+///
+/// [`compile_error!`]: std::compile_error!
+///
+/// When parsing macro input, the [`parse_macro_input!`] macro handles the
+/// conversion to `compile_error!` automatically.
+///
+/// [`parse_macro_input!`]: crate::parse_macro_input!
+///
+/// ```
+/// # extern crate proc_macro;
+/// #
+/// use proc_macro::TokenStream;
+/// use syn::{parse_macro_input, AttributeArgs, ItemFn};
+///
+/// # const IGNORE: &str = stringify! {
+/// #[proc_macro_attribute]
+/// # };
+/// pub fn my_attr(args: TokenStream, input: TokenStream) -> TokenStream {
+/// let args = parse_macro_input!(args as AttributeArgs);
+/// let input = parse_macro_input!(input as ItemFn);
+///
+/// /* ... */
+/// # TokenStream::new()
+/// }
+/// ```
+///
+/// For errors that arise later than the initial parsing stage, the
+/// [`.to_compile_error()`] or [`.into_compile_error()`] methods can be used to
+/// perform an explicit conversion to `compile_error!`.
+///
+/// [`.to_compile_error()`]: Error::to_compile_error
+/// [`.into_compile_error()`]: Error::into_compile_error
+///
+/// ```
+/// # extern crate proc_macro;
+/// #
+/// # use proc_macro::TokenStream;
+/// # use syn::{parse_macro_input, DeriveInput};
+/// #
+/// # const IGNORE: &str = stringify! {
+/// #[proc_macro_derive(MyDerive)]
+/// # };
+/// pub fn my_derive(input: TokenStream) -> TokenStream {
+/// let input = parse_macro_input!(input as DeriveInput);
+///
+/// // fn(DeriveInput) -> syn::Result<proc_macro2::TokenStream>
+/// expand::my_derive(input)
+/// .unwrap_or_else(syn::Error::into_compile_error)
+/// .into()
+/// }
+/// #
+/// # mod expand {
+/// # use proc_macro2::TokenStream;
+/// # use syn::{DeriveInput, Result};
+/// #
+/// # pub fn my_derive(input: DeriveInput) -> Result<TokenStream> {
+/// # unimplemented!()
+/// # }
+/// # }
+/// ```
+pub struct Error {
+ messages: Vec<ErrorMessage>,
+}
+
+struct ErrorMessage {
+ // Span is implemented as an index into a thread-local interner to keep the
+ // size small. It is not safe to access from a different thread. We want
+ // errors to be Send and Sync to play nicely with the Failure crate, so pin
+ // the span we're given to its original thread and assume it is
+ // Span::call_site if accessed from any other thread.
+ start_span: ThreadBound<Span>,
+ end_span: ThreadBound<Span>,
+ message: String,
+}
+
+#[cfg(test)]
+struct _Test
+where
+ Error: Send + Sync;
+
+impl Error {
+ /// Usually the [`ParseStream::error`] method will be used instead, which
+ /// automatically uses the correct span from the current position of the
+ /// parse stream.
+ ///
+ /// Use `Error::new` when the error needs to be triggered on some span other
+ /// than where the parse stream is currently positioned.
+ ///
+ /// [`ParseStream::error`]: crate::parse::ParseBuffer::error
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use syn::{Error, Ident, LitStr, Result, Token};
+ /// use syn::parse::ParseStream;
+ ///
+ /// // Parses input that looks like `name = "string"` where the key must be
+ /// // the identifier `name` and the value may be any string literal.
+ /// // Returns the string literal.
+ /// fn parse_name(input: ParseStream) -> Result<LitStr> {
+ /// let name_token: Ident = input.parse()?;
+ /// if name_token != "name" {
+ /// // Trigger an error not on the current position of the stream,
+ /// // but on the position of the unexpected identifier.
+ /// return Err(Error::new(name_token.span(), "expected `name`"));
+ /// }
+ /// input.parse::<Token![=]>()?;
+ /// let s: LitStr = input.parse()?;
+ /// Ok(s)
+ /// }
+ /// ```
+ pub fn new<T: Display>(span: Span, message: T) -> Self {
+ return new(span, message.to_string());
+
+ fn new(span: Span, message: String) -> Error {
+ Error {
+ messages: vec![ErrorMessage {
+ start_span: ThreadBound::new(span),
+ end_span: ThreadBound::new(span),
+ message,
+ }],
+ }
+ }
+ }
+
+ /// Creates an error with the specified message spanning the given syntax
+ /// tree node.
+ ///
+ /// Unlike the `Error::new` constructor, this constructor takes an argument
+ /// `tokens` which is a syntax tree node. This allows the resulting `Error`
+ /// to attempt to span all tokens inside of `tokens`. While you would
+ /// typically be able to use the `Spanned` trait with the above `Error::new`
+ /// constructor, implementation limitations today mean that
+ /// `Error::new_spanned` may provide a higher-quality error message on
+ /// stable Rust.
+ ///
+ /// When in doubt it's recommended to stick to `Error::new` (or
+ /// `ParseStream::error`)!
+ #[cfg(feature = "printing")]
+ pub fn new_spanned<T: ToTokens, U: Display>(tokens: T, message: U) -> Self {
+ return new_spanned(tokens.into_token_stream(), message.to_string());
+
+ fn new_spanned(tokens: TokenStream, message: String) -> Error {
+ let mut iter = tokens.into_iter();
+ let start = iter.next().map_or_else(Span::call_site, |t| t.span());
+ let end = iter.last().map_or(start, |t| t.span());
+ Error {
+ messages: vec![ErrorMessage {
+ start_span: ThreadBound::new(start),
+ end_span: ThreadBound::new(end),
+ message,
+ }],
+ }
+ }
+ }
+
+ /// The source location of the error.
+ ///
+ /// Spans are not thread-safe so this function returns `Span::call_site()`
+ /// if called from a different thread than the one on which the `Error` was
+ /// originally created.
+ pub fn span(&self) -> Span {
+ let start = match self.messages[0].start_span.get() {
+ Some(span) => *span,
+ None => return Span::call_site(),
+ };
+ let end = match self.messages[0].end_span.get() {
+ Some(span) => *span,
+ None => return Span::call_site(),
+ };
+ start.join(end).unwrap_or(start)
+ }
+
+ /// Render the error as an invocation of [`compile_error!`].
+ ///
+ /// The [`parse_macro_input!`] macro provides a convenient way to invoke
+ /// this method correctly in a procedural macro.
+ ///
+ /// [`compile_error!`]: std::compile_error!
+ /// [`parse_macro_input!`]: crate::parse_macro_input!
+ pub fn to_compile_error(&self) -> TokenStream {
+ self.messages
+ .iter()
+ .map(ErrorMessage::to_compile_error)
+ .collect()
+ }
+
+ /// Render the error as an invocation of [`compile_error!`].
+ ///
+ /// [`compile_error!`]: std::compile_error!
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// # extern crate proc_macro;
+ /// #
+ /// use proc_macro::TokenStream;
+ /// use syn::{parse_macro_input, DeriveInput, Error};
+ ///
+ /// # const _: &str = stringify! {
+ /// #[proc_macro_derive(MyTrait)]
+ /// # };
+ /// pub fn derive_my_trait(input: TokenStream) -> TokenStream {
+ /// let input = parse_macro_input!(input as DeriveInput);
+ /// my_trait::expand(input)
+ /// .unwrap_or_else(Error::into_compile_error)
+ /// .into()
+ /// }
+ ///
+ /// mod my_trait {
+ /// use proc_macro2::TokenStream;
+ /// use syn::{DeriveInput, Result};
+ ///
+ /// pub(crate) fn expand(input: DeriveInput) -> Result<TokenStream> {
+ /// /* ... */
+ /// # unimplemented!()
+ /// }
+ /// }
+ /// ```
+ pub fn into_compile_error(self) -> TokenStream {
+ self.to_compile_error()
+ }
+
+ /// Add another error message to self such that when `to_compile_error()` is
+ /// called, both errors will be emitted together.
+ pub fn combine(&mut self, another: Error) {
+ self.messages.extend(another.messages);
+ }
+}
+
+impl ErrorMessage {
+ fn to_compile_error(&self) -> TokenStream {
+ let start = self
+ .start_span
+ .get()
+ .cloned()
+ .unwrap_or_else(Span::call_site);
+ let end = self.end_span.get().cloned().unwrap_or_else(Span::call_site);
+
+ // compile_error!($message)
+ TokenStream::from_iter(vec![
+ TokenTree::Ident(Ident::new("compile_error", start)),
+ TokenTree::Punct({
+ let mut punct = Punct::new('!', Spacing::Alone);
+ punct.set_span(start);
+ punct
+ }),
+ TokenTree::Group({
+ let mut group = Group::new(Delimiter::Brace, {
+ TokenStream::from_iter(vec![TokenTree::Literal({
+ let mut string = Literal::string(&self.message);
+ string.set_span(end);
+ string
+ })])
+ });
+ group.set_span(end);
+ group
+ }),
+ ])
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub fn new_at<T: Display>(scope: Span, cursor: Cursor, message: T) -> Error {
+ if cursor.eof() {
+ Error::new(scope, format!("unexpected end of input, {}", message))
+ } else {
+ let span = crate::buffer::open_span_of_group(cursor);
+ Error::new(span, message)
+ }
+}
+
+#[cfg(all(feature = "parsing", any(feature = "full", feature = "derive")))]
+pub fn new2<T: Display>(start: Span, end: Span, message: T) -> Error {
+ return new2(start, end, message.to_string());
+
+ fn new2(start: Span, end: Span, message: String) -> Error {
+ Error {
+ messages: vec![ErrorMessage {
+ start_span: ThreadBound::new(start),
+ end_span: ThreadBound::new(end),
+ message,
+ }],
+ }
+ }
+}
+
+impl Debug for Error {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ if self.messages.len() == 1 {
+ formatter
+ .debug_tuple("Error")
+ .field(&self.messages[0])
+ .finish()
+ } else {
+ formatter
+ .debug_tuple("Error")
+ .field(&self.messages)
+ .finish()
+ }
+ }
+}
+
+impl Debug for ErrorMessage {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ Debug::fmt(&self.message, formatter)
+ }
+}
+
+impl Display for Error {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str(&self.messages[0].message)
+ }
+}
+
+impl Clone for Error {
+ fn clone(&self) -> Self {
+ Error {
+ messages: self.messages.clone(),
+ }
+ }
+}
+
+impl Clone for ErrorMessage {
+ fn clone(&self) -> Self {
+ let start = self
+ .start_span
+ .get()
+ .cloned()
+ .unwrap_or_else(Span::call_site);
+ let end = self.end_span.get().cloned().unwrap_or_else(Span::call_site);
+ ErrorMessage {
+ start_span: ThreadBound::new(start),
+ end_span: ThreadBound::new(end),
+ message: self.message.clone(),
+ }
+ }
+}
+
+impl std::error::Error for Error {}
+
+impl From<LexError> for Error {
+ fn from(err: LexError) -> Self {
+ Error::new(err.span(), "lex error")
+ }
+}
+
+impl IntoIterator for Error {
+ type Item = Error;
+ type IntoIter = IntoIter;
+
+ fn into_iter(self) -> Self::IntoIter {
+ IntoIter {
+ messages: self.messages.into_iter(),
+ }
+ }
+}
+
+pub struct IntoIter {
+ messages: vec::IntoIter<ErrorMessage>,
+}
+
+impl Iterator for IntoIter {
+ type Item = Error;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ Some(Error {
+ messages: vec![self.messages.next()?],
+ })
+ }
+}
+
+impl<'a> IntoIterator for &'a Error {
+ type Item = Error;
+ type IntoIter = Iter<'a>;
+
+ fn into_iter(self) -> Self::IntoIter {
+ Iter {
+ messages: self.messages.iter(),
+ }
+ }
+}
+
+pub struct Iter<'a> {
+ messages: slice::Iter<'a, ErrorMessage>,
+}
+
+impl<'a> Iterator for Iter<'a> {
+ type Item = Error;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ Some(Error {
+ messages: vec![self.messages.next()?.clone()],
+ })
+ }
+}
+
+impl Extend<Error> for Error {
+ fn extend<T: IntoIterator<Item = Error>>(&mut self, iter: T) {
+ for err in iter {
+ self.combine(err);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/export.rs b/third_party/rust/syn/src/export.rs
new file mode 100644
index 0000000000..f478d091ea
--- /dev/null
+++ b/third_party/rust/syn/src/export.rs
@@ -0,0 +1,39 @@
+pub use std::clone::Clone;
+pub use std::cmp::{Eq, PartialEq};
+pub use std::default::Default;
+pub use std::fmt::{self, Debug, Formatter};
+pub use std::hash::{Hash, Hasher};
+pub use std::marker::Copy;
+pub use std::option::Option::{None, Some};
+pub use std::result::Result::{Err, Ok};
+
+#[cfg(feature = "printing")]
+pub extern crate quote;
+
+pub use proc_macro2::{Span, TokenStream as TokenStream2};
+
+#[cfg(feature = "parsing")]
+pub use crate::group::{parse_braces, parse_brackets, parse_parens};
+
+pub use crate::span::IntoSpans;
+
+#[cfg(all(
+ not(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "wasi"))),
+ feature = "proc-macro"
+))]
+pub use proc_macro::TokenStream;
+
+#[cfg(feature = "printing")]
+pub use quote::{ToTokens, TokenStreamExt};
+
+#[allow(non_camel_case_types)]
+pub type bool = help::Bool;
+#[allow(non_camel_case_types)]
+pub type str = help::Str;
+
+mod help {
+ pub type Bool = bool;
+ pub type Str = str;
+}
+
+pub struct private(pub(crate) ());
diff --git a/third_party/rust/syn/src/expr.rs b/third_party/rust/syn/src/expr.rs
new file mode 100644
index 0000000000..93a59b0e20
--- /dev/null
+++ b/third_party/rust/syn/src/expr.rs
@@ -0,0 +1,3558 @@
+use super::*;
+use crate::punctuated::Punctuated;
+#[cfg(feature = "full")]
+use crate::reserved::Reserved;
+use proc_macro2::{Span, TokenStream};
+#[cfg(feature = "printing")]
+use quote::IdentFragment;
+#[cfg(feature = "printing")]
+use std::fmt::{self, Display};
+use std::hash::{Hash, Hasher};
+#[cfg(feature = "parsing")]
+use std::mem;
+
+ast_enum_of_structs! {
+ /// A Rust expression.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature, but most of the variants are not available unless "full" is enabled.*
+ ///
+ /// # Syntax tree enums
+ ///
+ /// This type is a syntax tree enum. In Syn this and other syntax tree enums
+ /// are designed to be traversed using the following rebinding idiom.
+ ///
+ /// ```
+ /// # use syn::Expr;
+ /// #
+ /// # fn example(expr: Expr) {
+ /// # const IGNORE: &str = stringify! {
+ /// let expr: Expr = /* ... */;
+ /// # };
+ /// match expr {
+ /// Expr::MethodCall(expr) => {
+ /// /* ... */
+ /// }
+ /// Expr::Cast(expr) => {
+ /// /* ... */
+ /// }
+ /// Expr::If(expr) => {
+ /// /* ... */
+ /// }
+ ///
+ /// /* ... */
+ /// # _ => {}
+ /// # }
+ /// # }
+ /// ```
+ ///
+ /// We begin with a variable `expr` of type `Expr` that has no fields
+ /// (because it is an enum), and by matching on it and rebinding a variable
+ /// with the same name `expr` we effectively imbue our variable with all of
+ /// the data fields provided by the variant that it turned out to be. So for
+ /// example above if we ended up in the `MethodCall` case then we get to use
+ /// `expr.receiver`, `expr.args` etc; if we ended up in the `If` case we get
+ /// to use `expr.cond`, `expr.then_branch`, `expr.else_branch`.
+ ///
+ /// This approach avoids repeating the variant names twice on every line.
+ ///
+ /// ```
+ /// # use syn::{Expr, ExprMethodCall};
+ /// #
+ /// # fn example(expr: Expr) {
+ /// // Repetitive; recommend not doing this.
+ /// match expr {
+ /// Expr::MethodCall(ExprMethodCall { method, args, .. }) => {
+ /// # }
+ /// # _ => {}
+ /// # }
+ /// # }
+ /// ```
+ ///
+ /// In general, the name to which a syntax tree enum variant is bound should
+ /// be a suitable name for the complete syntax tree enum type.
+ ///
+ /// ```
+ /// # use syn::{Expr, ExprField};
+ /// #
+ /// # fn example(discriminant: ExprField) {
+ /// // Binding is called `base` which is the name I would use if I were
+ /// // assigning `*discriminant.base` without an `if let`.
+ /// if let Expr::Tuple(base) = *discriminant.base {
+ /// # }
+ /// # }
+ /// ```
+ ///
+ /// A sign that you may not be choosing the right variable names is if you
+ /// see names getting repeated in your code, like accessing
+ /// `receiver.receiver` or `pat.pat` or `cond.cond`.
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ #[cfg_attr(not(syn_no_non_exhaustive), non_exhaustive)]
+ pub enum Expr {
+ /// A slice literal expression: `[a, b, c, d]`.
+ Array(ExprArray),
+
+ /// An assignment expression: `a = compute()`.
+ Assign(ExprAssign),
+
+ /// A compound assignment expression: `counter += 1`.
+ AssignOp(ExprAssignOp),
+
+ /// An async block: `async { ... }`.
+ Async(ExprAsync),
+
+ /// An await expression: `fut.await`.
+ Await(ExprAwait),
+
+ /// A binary operation: `a + b`, `a * b`.
+ Binary(ExprBinary),
+
+ /// A blocked scope: `{ ... }`.
+ Block(ExprBlock),
+
+ /// A box expression: `box f`.
+ Box(ExprBox),
+
+ /// A `break`, with an optional label to break and an optional
+ /// expression.
+ Break(ExprBreak),
+
+ /// A function call expression: `invoke(a, b)`.
+ Call(ExprCall),
+
+ /// A cast expression: `foo as f64`.
+ Cast(ExprCast),
+
+ /// A closure expression: `|a, b| a + b`.
+ Closure(ExprClosure),
+
+ /// A `continue`, with an optional label.
+ Continue(ExprContinue),
+
+ /// Access of a named struct field (`obj.k`) or unnamed tuple struct
+ /// field (`obj.0`).
+ Field(ExprField),
+
+ /// A for loop: `for pat in expr { ... }`.
+ ForLoop(ExprForLoop),
+
+ /// An expression contained within invisible delimiters.
+ ///
+ /// This variant is important for faithfully representing the precedence
+ /// of expressions and is related to `None`-delimited spans in a
+ /// `TokenStream`.
+ Group(ExprGroup),
+
+ /// An `if` expression with an optional `else` block: `if expr { ... }
+ /// else { ... }`.
+ ///
+ /// The `else` branch expression may only be an `If` or `Block`
+ /// expression, not any of the other types of expression.
+ If(ExprIf),
+
+ /// A square bracketed indexing expression: `vector[2]`.
+ Index(ExprIndex),
+
+ /// A `let` guard: `let Some(x) = opt`.
+ Let(ExprLet),
+
+ /// A literal in place of an expression: `1`, `"foo"`.
+ Lit(ExprLit),
+
+ /// Conditionless loop: `loop { ... }`.
+ Loop(ExprLoop),
+
+ /// A macro invocation expression: `format!("{}", q)`.
+ Macro(ExprMacro),
+
+ /// A `match` expression: `match n { Some(n) => {}, None => {} }`.
+ Match(ExprMatch),
+
+ /// A method call expression: `x.foo::<T>(a, b)`.
+ MethodCall(ExprMethodCall),
+
+ /// A parenthesized expression: `(a + b)`.
+ Paren(ExprParen),
+
+ /// A path like `std::mem::replace` possibly containing generic
+ /// parameters and a qualified self-type.
+ ///
+ /// A plain identifier like `x` is a path of length 1.
+ Path(ExprPath),
+
+ /// A range expression: `1..2`, `1..`, `..2`, `1..=2`, `..=2`.
+ Range(ExprRange),
+
+ /// A referencing operation: `&a` or `&mut a`.
+ Reference(ExprReference),
+
+ /// An array literal constructed from one repeated element: `[0u8; N]`.
+ Repeat(ExprRepeat),
+
+ /// A `return`, with an optional value to be returned.
+ Return(ExprReturn),
+
+ /// A struct literal expression: `Point { x: 1, y: 1 }`.
+ ///
+ /// The `rest` provides the value of the remaining fields as in `S { a:
+ /// 1, b: 1, ..rest }`.
+ Struct(ExprStruct),
+
+ /// A try-expression: `expr?`.
+ Try(ExprTry),
+
+ /// A try block: `try { ... }`.
+ TryBlock(ExprTryBlock),
+
+ /// A tuple expression: `(a, b, c, d)`.
+ Tuple(ExprTuple),
+
+ /// A type ascription expression: `foo: f64`.
+ Type(ExprType),
+
+ /// A unary operation: `!x`, `*x`.
+ Unary(ExprUnary),
+
+ /// An unsafe block: `unsafe { ... }`.
+ Unsafe(ExprUnsafe),
+
+ /// Tokens in expression position not interpreted by Syn.
+ Verbatim(TokenStream),
+
+ /// A while loop: `while expr { ... }`.
+ While(ExprWhile),
+
+ /// A yield expression: `yield expr`.
+ Yield(ExprYield),
+
+ // Not public API.
+ //
+ // For testing exhaustiveness in downstream code, use the following idiom:
+ //
+ // match expr {
+ // Expr::Array(expr) => {...}
+ // Expr::Assign(expr) => {...}
+ // ...
+ // Expr::Yield(expr) => {...}
+ //
+ // #[cfg_attr(test, deny(non_exhaustive_omitted_patterns))]
+ // _ => { /* some sane fallback */ }
+ // }
+ //
+ // This way we fail your tests but don't break your library when adding
+ // a variant. You will be notified by a test failure when a variant is
+ // added, so that you can add code to handle it, but your library will
+ // continue to compile and work for downstream users in the interim.
+ #[cfg(syn_no_non_exhaustive)]
+ #[doc(hidden)]
+ __NonExhaustive,
+ }
+}
+
+ast_struct! {
+ /// A slice literal expression: `[a, b, c, d]`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprArray #full {
+ pub attrs: Vec<Attribute>,
+ pub bracket_token: token::Bracket,
+ pub elems: Punctuated<Expr, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// An assignment expression: `a = compute()`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprAssign #full {
+ pub attrs: Vec<Attribute>,
+ pub left: Box<Expr>,
+ pub eq_token: Token![=],
+ pub right: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// A compound assignment expression: `counter += 1`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprAssignOp #full {
+ pub attrs: Vec<Attribute>,
+ pub left: Box<Expr>,
+ pub op: BinOp,
+ pub right: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// An async block: `async { ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprAsync #full {
+ pub attrs: Vec<Attribute>,
+ pub async_token: Token![async],
+ pub capture: Option<Token![move]>,
+ pub block: Block,
+ }
+}
+
+ast_struct! {
+ /// An await expression: `fut.await`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprAwait #full {
+ pub attrs: Vec<Attribute>,
+ pub base: Box<Expr>,
+ pub dot_token: Token![.],
+ pub await_token: token::Await,
+ }
+}
+
+ast_struct! {
+ /// A binary operation: `a + b`, `a * b`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ExprBinary {
+ pub attrs: Vec<Attribute>,
+ pub left: Box<Expr>,
+ pub op: BinOp,
+ pub right: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// A blocked scope: `{ ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprBlock #full {
+ pub attrs: Vec<Attribute>,
+ pub label: Option<Label>,
+ pub block: Block,
+ }
+}
+
+ast_struct! {
+ /// A box expression: `box f`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprBox #full {
+ pub attrs: Vec<Attribute>,
+ pub box_token: Token![box],
+ pub expr: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// A `break`, with an optional label to break and an optional
+ /// expression.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprBreak #full {
+ pub attrs: Vec<Attribute>,
+ pub break_token: Token![break],
+ pub label: Option<Lifetime>,
+ pub expr: Option<Box<Expr>>,
+ }
+}
+
+ast_struct! {
+ /// A function call expression: `invoke(a, b)`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ExprCall {
+ pub attrs: Vec<Attribute>,
+ pub func: Box<Expr>,
+ pub paren_token: token::Paren,
+ pub args: Punctuated<Expr, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// A cast expression: `foo as f64`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ExprCast {
+ pub attrs: Vec<Attribute>,
+ pub expr: Box<Expr>,
+ pub as_token: Token![as],
+ pub ty: Box<Type>,
+ }
+}
+
+ast_struct! {
+ /// A closure expression: `|a, b| a + b`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprClosure #full {
+ pub attrs: Vec<Attribute>,
+ pub movability: Option<Token![static]>,
+ pub asyncness: Option<Token![async]>,
+ pub capture: Option<Token![move]>,
+ pub or1_token: Token![|],
+ pub inputs: Punctuated<Pat, Token![,]>,
+ pub or2_token: Token![|],
+ pub output: ReturnType,
+ pub body: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// A `continue`, with an optional label.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprContinue #full {
+ pub attrs: Vec<Attribute>,
+ pub continue_token: Token![continue],
+ pub label: Option<Lifetime>,
+ }
+}
+
+ast_struct! {
+ /// Access of a named struct field (`obj.k`) or unnamed tuple struct
+ /// field (`obj.0`).
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ExprField {
+ pub attrs: Vec<Attribute>,
+ pub base: Box<Expr>,
+ pub dot_token: Token![.],
+ pub member: Member,
+ }
+}
+
+ast_struct! {
+ /// A for loop: `for pat in expr { ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprForLoop #full {
+ pub attrs: Vec<Attribute>,
+ pub label: Option<Label>,
+ pub for_token: Token![for],
+ pub pat: Pat,
+ pub in_token: Token![in],
+ pub expr: Box<Expr>,
+ pub body: Block,
+ }
+}
+
+ast_struct! {
+ /// An expression contained within invisible delimiters.
+ ///
+ /// This variant is important for faithfully representing the precedence
+ /// of expressions and is related to `None`-delimited spans in a
+ /// `TokenStream`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprGroup #full {
+ pub attrs: Vec<Attribute>,
+ pub group_token: token::Group,
+ pub expr: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// An `if` expression with an optional `else` block: `if expr { ... }
+ /// else { ... }`.
+ ///
+ /// The `else` branch expression may only be an `If` or `Block`
+ /// expression, not any of the other types of expression.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprIf #full {
+ pub attrs: Vec<Attribute>,
+ pub if_token: Token![if],
+ pub cond: Box<Expr>,
+ pub then_branch: Block,
+ pub else_branch: Option<(Token![else], Box<Expr>)>,
+ }
+}
+
+ast_struct! {
+ /// A square bracketed indexing expression: `vector[2]`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ExprIndex {
+ pub attrs: Vec<Attribute>,
+ pub expr: Box<Expr>,
+ pub bracket_token: token::Bracket,
+ pub index: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// A `let` guard: `let Some(x) = opt`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprLet #full {
+ pub attrs: Vec<Attribute>,
+ pub let_token: Token![let],
+ pub pat: Pat,
+ pub eq_token: Token![=],
+ pub expr: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// A literal in place of an expression: `1`, `"foo"`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ExprLit {
+ pub attrs: Vec<Attribute>,
+ pub lit: Lit,
+ }
+}
+
+ast_struct! {
+ /// Conditionless loop: `loop { ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprLoop #full {
+ pub attrs: Vec<Attribute>,
+ pub label: Option<Label>,
+ pub loop_token: Token![loop],
+ pub body: Block,
+ }
+}
+
+ast_struct! {
+ /// A macro invocation expression: `format!("{}", q)`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprMacro #full {
+ pub attrs: Vec<Attribute>,
+ pub mac: Macro,
+ }
+}
+
+ast_struct! {
+ /// A `match` expression: `match n { Some(n) => {}, None => {} }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprMatch #full {
+ pub attrs: Vec<Attribute>,
+ pub match_token: Token![match],
+ pub expr: Box<Expr>,
+ pub brace_token: token::Brace,
+ pub arms: Vec<Arm>,
+ }
+}
+
+ast_struct! {
+ /// A method call expression: `x.foo::<T>(a, b)`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprMethodCall #full {
+ pub attrs: Vec<Attribute>,
+ pub receiver: Box<Expr>,
+ pub dot_token: Token![.],
+ pub method: Ident,
+ pub turbofish: Option<MethodTurbofish>,
+ pub paren_token: token::Paren,
+ pub args: Punctuated<Expr, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// A parenthesized expression: `(a + b)`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ExprParen {
+ pub attrs: Vec<Attribute>,
+ pub paren_token: token::Paren,
+ pub expr: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// A path like `std::mem::replace` possibly containing generic
+ /// parameters and a qualified self-type.
+ ///
+ /// A plain identifier like `x` is a path of length 1.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ExprPath {
+ pub attrs: Vec<Attribute>,
+ pub qself: Option<QSelf>,
+ pub path: Path,
+ }
+}
+
+ast_struct! {
+ /// A range expression: `1..2`, `1..`, `..2`, `1..=2`, `..=2`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprRange #full {
+ pub attrs: Vec<Attribute>,
+ pub from: Option<Box<Expr>>,
+ pub limits: RangeLimits,
+ pub to: Option<Box<Expr>>,
+ }
+}
+
+ast_struct! {
+ /// A referencing operation: `&a` or `&mut a`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprReference #full {
+ pub attrs: Vec<Attribute>,
+ pub and_token: Token![&],
+ pub raw: Reserved,
+ pub mutability: Option<Token![mut]>,
+ pub expr: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// An array literal constructed from one repeated element: `[0u8; N]`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprRepeat #full {
+ pub attrs: Vec<Attribute>,
+ pub bracket_token: token::Bracket,
+ pub expr: Box<Expr>,
+ pub semi_token: Token![;],
+ pub len: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// A `return`, with an optional value to be returned.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprReturn #full {
+ pub attrs: Vec<Attribute>,
+ pub return_token: Token![return],
+ pub expr: Option<Box<Expr>>,
+ }
+}
+
+ast_struct! {
+ /// A struct literal expression: `Point { x: 1, y: 1 }`.
+ ///
+ /// The `rest` provides the value of the remaining fields as in `S { a:
+ /// 1, b: 1, ..rest }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprStruct #full {
+ pub attrs: Vec<Attribute>,
+ pub path: Path,
+ pub brace_token: token::Brace,
+ pub fields: Punctuated<FieldValue, Token![,]>,
+ pub dot2_token: Option<Token![..]>,
+ pub rest: Option<Box<Expr>>,
+ }
+}
+
+ast_struct! {
+ /// A try-expression: `expr?`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprTry #full {
+ pub attrs: Vec<Attribute>,
+ pub expr: Box<Expr>,
+ pub question_token: Token![?],
+ }
+}
+
+ast_struct! {
+ /// A try block: `try { ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprTryBlock #full {
+ pub attrs: Vec<Attribute>,
+ pub try_token: Token![try],
+ pub block: Block,
+ }
+}
+
+ast_struct! {
+ /// A tuple expression: `(a, b, c, d)`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprTuple #full {
+ pub attrs: Vec<Attribute>,
+ pub paren_token: token::Paren,
+ pub elems: Punctuated<Expr, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// A type ascription expression: `foo: f64`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprType #full {
+ pub attrs: Vec<Attribute>,
+ pub expr: Box<Expr>,
+ pub colon_token: Token![:],
+ pub ty: Box<Type>,
+ }
+}
+
+ast_struct! {
+ /// A unary operation: `!x`, `*x`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ExprUnary {
+ pub attrs: Vec<Attribute>,
+ pub op: UnOp,
+ pub expr: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// An unsafe block: `unsafe { ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprUnsafe #full {
+ pub attrs: Vec<Attribute>,
+ pub unsafe_token: Token![unsafe],
+ pub block: Block,
+ }
+}
+
+ast_struct! {
+ /// A while loop: `while expr { ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprWhile #full {
+ pub attrs: Vec<Attribute>,
+ pub label: Option<Label>,
+ pub while_token: Token![while],
+ pub cond: Box<Expr>,
+ pub body: Block,
+ }
+}
+
+ast_struct! {
+ /// A yield expression: `yield expr`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ExprYield #full {
+ pub attrs: Vec<Attribute>,
+ pub yield_token: Token![yield],
+ pub expr: Option<Box<Expr>>,
+ }
+}
+
+impl Expr {
+ #[cfg(all(feature = "parsing", not(syn_no_const_vec_new)))]
+ const DUMMY: Self = Expr::Path(ExprPath {
+ attrs: Vec::new(),
+ qself: None,
+ path: Path {
+ leading_colon: None,
+ segments: Punctuated::new(),
+ },
+ });
+
+ #[cfg(all(feature = "parsing", feature = "full"))]
+ pub(crate) fn replace_attrs(&mut self, new: Vec<Attribute>) -> Vec<Attribute> {
+ match self {
+ Expr::Box(ExprBox { attrs, .. })
+ | Expr::Array(ExprArray { attrs, .. })
+ | Expr::Call(ExprCall { attrs, .. })
+ | Expr::MethodCall(ExprMethodCall { attrs, .. })
+ | Expr::Tuple(ExprTuple { attrs, .. })
+ | Expr::Binary(ExprBinary { attrs, .. })
+ | Expr::Unary(ExprUnary { attrs, .. })
+ | Expr::Lit(ExprLit { attrs, .. })
+ | Expr::Cast(ExprCast { attrs, .. })
+ | Expr::Type(ExprType { attrs, .. })
+ | Expr::Let(ExprLet { attrs, .. })
+ | Expr::If(ExprIf { attrs, .. })
+ | Expr::While(ExprWhile { attrs, .. })
+ | Expr::ForLoop(ExprForLoop { attrs, .. })
+ | Expr::Loop(ExprLoop { attrs, .. })
+ | Expr::Match(ExprMatch { attrs, .. })
+ | Expr::Closure(ExprClosure { attrs, .. })
+ | Expr::Unsafe(ExprUnsafe { attrs, .. })
+ | Expr::Block(ExprBlock { attrs, .. })
+ | Expr::Assign(ExprAssign { attrs, .. })
+ | Expr::AssignOp(ExprAssignOp { attrs, .. })
+ | Expr::Field(ExprField { attrs, .. })
+ | Expr::Index(ExprIndex { attrs, .. })
+ | Expr::Range(ExprRange { attrs, .. })
+ | Expr::Path(ExprPath { attrs, .. })
+ | Expr::Reference(ExprReference { attrs, .. })
+ | Expr::Break(ExprBreak { attrs, .. })
+ | Expr::Continue(ExprContinue { attrs, .. })
+ | Expr::Return(ExprReturn { attrs, .. })
+ | Expr::Macro(ExprMacro { attrs, .. })
+ | Expr::Struct(ExprStruct { attrs, .. })
+ | Expr::Repeat(ExprRepeat { attrs, .. })
+ | Expr::Paren(ExprParen { attrs, .. })
+ | Expr::Group(ExprGroup { attrs, .. })
+ | Expr::Try(ExprTry { attrs, .. })
+ | Expr::Async(ExprAsync { attrs, .. })
+ | Expr::Await(ExprAwait { attrs, .. })
+ | Expr::TryBlock(ExprTryBlock { attrs, .. })
+ | Expr::Yield(ExprYield { attrs, .. }) => mem::replace(attrs, new),
+ Expr::Verbatim(_) => Vec::new(),
+
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+
+ast_enum! {
+ /// A struct or tuple struct field accessed in a struct literal or field
+ /// expression.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum Member {
+ /// A named field like `self.x`.
+ Named(Ident),
+ /// An unnamed field like `self.0`.
+ Unnamed(Index),
+ }
+}
+
+impl From<Ident> for Member {
+ fn from(ident: Ident) -> Member {
+ Member::Named(ident)
+ }
+}
+
+impl From<Index> for Member {
+ fn from(index: Index) -> Member {
+ Member::Unnamed(index)
+ }
+}
+
+impl From<usize> for Member {
+ fn from(index: usize) -> Member {
+ Member::Unnamed(Index::from(index))
+ }
+}
+
+impl Eq for Member {}
+
+impl PartialEq for Member {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (Member::Named(this), Member::Named(other)) => this == other,
+ (Member::Unnamed(this), Member::Unnamed(other)) => this == other,
+ _ => false,
+ }
+ }
+}
+
+impl Hash for Member {
+ fn hash<H: Hasher>(&self, state: &mut H) {
+ match self {
+ Member::Named(m) => m.hash(state),
+ Member::Unnamed(m) => m.hash(state),
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+impl IdentFragment for Member {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Member::Named(m) => Display::fmt(m, formatter),
+ Member::Unnamed(m) => Display::fmt(&m.index, formatter),
+ }
+ }
+
+ fn span(&self) -> Option<Span> {
+ match self {
+ Member::Named(m) => Some(m.span()),
+ Member::Unnamed(m) => Some(m.span),
+ }
+ }
+}
+
+ast_struct! {
+ /// The index of an unnamed tuple struct field.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Index {
+ pub index: u32,
+ pub span: Span,
+ }
+}
+
+impl From<usize> for Index {
+ fn from(index: usize) -> Index {
+ assert!(index < u32::max_value() as usize);
+ Index {
+ index: index as u32,
+ span: Span::call_site(),
+ }
+ }
+}
+
+impl Eq for Index {}
+
+impl PartialEq for Index {
+ fn eq(&self, other: &Self) -> bool {
+ self.index == other.index
+ }
+}
+
+impl Hash for Index {
+ fn hash<H: Hasher>(&self, state: &mut H) {
+ self.index.hash(state);
+ }
+}
+
+#[cfg(feature = "printing")]
+impl IdentFragment for Index {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ Display::fmt(&self.index, formatter)
+ }
+
+ fn span(&self) -> Option<Span> {
+ Some(self.span)
+ }
+}
+
+#[cfg(feature = "full")]
+ast_struct! {
+ /// The `::<>` explicit type parameters passed to a method call:
+ /// `parse::<u64>()`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct MethodTurbofish {
+ pub colon2_token: Token![::],
+ pub lt_token: Token![<],
+ pub args: Punctuated<GenericMethodArgument, Token![,]>,
+ pub gt_token: Token![>],
+ }
+}
+
+#[cfg(feature = "full")]
+ast_enum! {
+ /// An individual generic argument to a method, like `T`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub enum GenericMethodArgument {
+ /// A type argument.
+ Type(Type),
+ /// A const expression. Must be inside of a block.
+ ///
+ /// NOTE: Identity expressions are represented as Type arguments, as
+ /// they are indistinguishable syntactically.
+ Const(Expr),
+ }
+}
+
+#[cfg(feature = "full")]
+ast_struct! {
+ /// A field-value pair in a struct literal.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct FieldValue {
+ /// Attributes tagged on the field.
+ pub attrs: Vec<Attribute>,
+
+ /// Name or index of the field.
+ pub member: Member,
+
+ /// The colon in `Struct { x: x }`. If written in shorthand like
+ /// `Struct { x }`, there is no colon.
+ pub colon_token: Option<Token![:]>,
+
+ /// Value of the field.
+ pub expr: Expr,
+ }
+}
+
+#[cfg(feature = "full")]
+ast_struct! {
+ /// A lifetime labeling a `for`, `while`, or `loop`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct Label {
+ pub name: Lifetime,
+ pub colon_token: Token![:],
+ }
+}
+
+#[cfg(feature = "full")]
+ast_struct! {
+ /// One arm of a `match` expression: `0...10 => { return true; }`.
+ ///
+ /// As in:
+ ///
+ /// ```
+ /// # fn f() -> bool {
+ /// # let n = 0;
+ /// match n {
+ /// 0...10 => {
+ /// return true;
+ /// }
+ /// // ...
+ /// # _ => {}
+ /// }
+ /// # false
+ /// # }
+ /// ```
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct Arm {
+ pub attrs: Vec<Attribute>,
+ pub pat: Pat,
+ pub guard: Option<(Token![if], Box<Expr>)>,
+ pub fat_arrow_token: Token![=>],
+ pub body: Box<Expr>,
+ pub comma: Option<Token![,]>,
+ }
+}
+
+#[cfg(feature = "full")]
+ast_enum! {
+ /// Limit types of a range, inclusive or exclusive.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub enum RangeLimits {
+ /// Inclusive at the beginning, exclusive at the end.
+ HalfOpen(Token![..]),
+ /// Inclusive at the beginning and end.
+ Closed(Token![..=]),
+ }
+}
+
+#[cfg(any(feature = "parsing", feature = "printing"))]
+#[cfg(feature = "full")]
+pub(crate) fn requires_terminator(expr: &Expr) -> bool {
+ // see https://github.com/rust-lang/rust/blob/2679c38fc/src/librustc_ast/util/classify.rs#L7-L25
+ match *expr {
+ Expr::Unsafe(..)
+ | Expr::Block(..)
+ | Expr::If(..)
+ | Expr::Match(..)
+ | Expr::While(..)
+ | Expr::Loop(..)
+ | Expr::ForLoop(..)
+ | Expr::Async(..)
+ | Expr::TryBlock(..) => false,
+ _ => true,
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub(crate) mod parsing {
+ use super::*;
+ #[cfg(feature = "full")]
+ use crate::parse::ParseBuffer;
+ use crate::parse::{Parse, ParseStream, Result};
+ use crate::path;
+ #[cfg(feature = "full")]
+ use proc_macro2::TokenTree;
+ use std::cmp::Ordering;
+
+ crate::custom_keyword!(raw);
+
+ // When we're parsing expressions which occur before blocks, like in an if
+ // statement's condition, we cannot parse a struct literal.
+ //
+ // Struct literals are ambiguous in certain positions
+ // https://github.com/rust-lang/rfcs/pull/92
+ pub struct AllowStruct(bool);
+
+ enum Precedence {
+ Any,
+ Assign,
+ Range,
+ Or,
+ And,
+ Compare,
+ BitOr,
+ BitXor,
+ BitAnd,
+ Shift,
+ Arithmetic,
+ Term,
+ Cast,
+ }
+
+ impl Precedence {
+ fn of(op: &BinOp) -> Self {
+ match *op {
+ BinOp::Add(_) | BinOp::Sub(_) => Precedence::Arithmetic,
+ BinOp::Mul(_) | BinOp::Div(_) | BinOp::Rem(_) => Precedence::Term,
+ BinOp::And(_) => Precedence::And,
+ BinOp::Or(_) => Precedence::Or,
+ BinOp::BitXor(_) => Precedence::BitXor,
+ BinOp::BitAnd(_) => Precedence::BitAnd,
+ BinOp::BitOr(_) => Precedence::BitOr,
+ BinOp::Shl(_) | BinOp::Shr(_) => Precedence::Shift,
+ BinOp::Eq(_)
+ | BinOp::Lt(_)
+ | BinOp::Le(_)
+ | BinOp::Ne(_)
+ | BinOp::Ge(_)
+ | BinOp::Gt(_) => Precedence::Compare,
+ BinOp::AddEq(_)
+ | BinOp::SubEq(_)
+ | BinOp::MulEq(_)
+ | BinOp::DivEq(_)
+ | BinOp::RemEq(_)
+ | BinOp::BitXorEq(_)
+ | BinOp::BitAndEq(_)
+ | BinOp::BitOrEq(_)
+ | BinOp::ShlEq(_)
+ | BinOp::ShrEq(_) => Precedence::Assign,
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Expr {
+ fn parse(input: ParseStream) -> Result<Self> {
+ ambiguous_expr(input, AllowStruct(true))
+ }
+ }
+
+ impl Expr {
+ /// An alternative to the primary `Expr::parse` parser (from the
+ /// [`Parse`] trait) for ambiguous syntactic positions in which a
+ /// trailing brace should not be taken as part of the expression.
+ ///
+ /// Rust grammar has an ambiguity where braces sometimes turn a path
+ /// expression into a struct initialization and sometimes do not. In the
+ /// following code, the expression `S {}` is one expression. Presumably
+ /// there is an empty struct `struct S {}` defined somewhere which it is
+ /// instantiating.
+ ///
+ /// ```
+ /// # struct S;
+ /// # impl std::ops::Deref for S {
+ /// # type Target = bool;
+ /// # fn deref(&self) -> &Self::Target {
+ /// # &true
+ /// # }
+ /// # }
+ /// let _ = *S {};
+ ///
+ /// // parsed by rustc as: `*(S {})`
+ /// ```
+ ///
+ /// We would want to parse the above using `Expr::parse` after the `=`
+ /// token.
+ ///
+ /// But in the following, `S {}` is *not* a struct init expression.
+ ///
+ /// ```
+ /// # const S: &bool = &true;
+ /// if *S {} {}
+ ///
+ /// // parsed by rustc as:
+ /// //
+ /// // if (*S) {
+ /// // /* empty block */
+ /// // }
+ /// // {
+ /// // /* another empty block */
+ /// // }
+ /// ```
+ ///
+ /// For that reason we would want to parse if-conditions using
+ /// `Expr::parse_without_eager_brace` after the `if` token. Same for
+ /// similar syntactic positions such as the condition expr after a
+ /// `while` token or the expr at the top of a `match`.
+ ///
+ /// The Rust grammar's choices around which way this ambiguity is
+ /// resolved at various syntactic positions is fairly arbitrary. Really
+ /// either parse behavior could work in most positions, and language
+ /// designers just decide each case based on which is more likely to be
+ /// what the programmer had in mind most of the time.
+ ///
+ /// ```
+ /// # struct S;
+ /// # fn doc() -> S {
+ /// if return S {} {}
+ /// # unreachable!()
+ /// # }
+ ///
+ /// // parsed by rustc as:
+ /// //
+ /// // if (return (S {})) {
+ /// // }
+ /// //
+ /// // but could equally well have been this other arbitrary choice:
+ /// //
+ /// // if (return S) {
+ /// // }
+ /// // {}
+ /// ```
+ ///
+ /// Note the grammar ambiguity on trailing braces is distinct from
+ /// precedence and is not captured by assigning a precedence level to
+ /// the braced struct init expr in relation to other operators. This can
+ /// be illustrated by `return 0..S {}` vs `match 0..S {}`. The former
+ /// parses as `return (0..(S {}))` implying tighter precedence for
+ /// struct init than `..`, while the latter parses as `match (0..S) {}`
+ /// implying tighter precedence for `..` than struct init, a
+ /// contradiction.
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(all(feature = "full", feature = "parsing"))))]
+ pub fn parse_without_eager_brace(input: ParseStream) -> Result<Expr> {
+ ambiguous_expr(input, AllowStruct(false))
+ }
+ }
+
+ impl Copy for AllowStruct {}
+
+ impl Clone for AllowStruct {
+ fn clone(&self) -> Self {
+ *self
+ }
+ }
+
+ impl Copy for Precedence {}
+
+ impl Clone for Precedence {
+ fn clone(&self) -> Self {
+ *self
+ }
+ }
+
+ impl PartialEq for Precedence {
+ fn eq(&self, other: &Self) -> bool {
+ *self as u8 == *other as u8
+ }
+ }
+
+ impl PartialOrd for Precedence {
+ fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+ let this = *self as u8;
+ let other = *other as u8;
+ Some(this.cmp(&other))
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn parse_expr(
+ input: ParseStream,
+ mut lhs: Expr,
+ allow_struct: AllowStruct,
+ base: Precedence,
+ ) -> Result<Expr> {
+ loop {
+ if input
+ .fork()
+ .parse::<BinOp>()
+ .ok()
+ .map_or(false, |op| Precedence::of(&op) >= base)
+ {
+ let op: BinOp = input.parse()?;
+ let precedence = Precedence::of(&op);
+ let mut rhs = unary_expr(input, allow_struct)?;
+ loop {
+ let next = peek_precedence(input);
+ if next > precedence || next == precedence && precedence == Precedence::Assign {
+ rhs = parse_expr(input, rhs, allow_struct, next)?;
+ } else {
+ break;
+ }
+ }
+ lhs = if precedence == Precedence::Assign {
+ Expr::AssignOp(ExprAssignOp {
+ attrs: Vec::new(),
+ left: Box::new(lhs),
+ op,
+ right: Box::new(rhs),
+ })
+ } else {
+ Expr::Binary(ExprBinary {
+ attrs: Vec::new(),
+ left: Box::new(lhs),
+ op,
+ right: Box::new(rhs),
+ })
+ };
+ } else if Precedence::Assign >= base
+ && input.peek(Token![=])
+ && !input.peek(Token![==])
+ && !input.peek(Token![=>])
+ {
+ let eq_token: Token![=] = input.parse()?;
+ let mut rhs = unary_expr(input, allow_struct)?;
+ loop {
+ let next = peek_precedence(input);
+ if next >= Precedence::Assign {
+ rhs = parse_expr(input, rhs, allow_struct, next)?;
+ } else {
+ break;
+ }
+ }
+ lhs = Expr::Assign(ExprAssign {
+ attrs: Vec::new(),
+ left: Box::new(lhs),
+ eq_token,
+ right: Box::new(rhs),
+ });
+ } else if Precedence::Range >= base && input.peek(Token![..]) {
+ let limits: RangeLimits = input.parse()?;
+ let rhs = if input.is_empty()
+ || input.peek(Token![,])
+ || input.peek(Token![;])
+ || input.peek(Token![.]) && !input.peek(Token![..])
+ || !allow_struct.0 && input.peek(token::Brace)
+ {
+ None
+ } else {
+ let mut rhs = unary_expr(input, allow_struct)?;
+ loop {
+ let next = peek_precedence(input);
+ if next > Precedence::Range {
+ rhs = parse_expr(input, rhs, allow_struct, next)?;
+ } else {
+ break;
+ }
+ }
+ Some(rhs)
+ };
+ lhs = Expr::Range(ExprRange {
+ attrs: Vec::new(),
+ from: Some(Box::new(lhs)),
+ limits,
+ to: rhs.map(Box::new),
+ });
+ } else if Precedence::Cast >= base && input.peek(Token![as]) {
+ let as_token: Token![as] = input.parse()?;
+ let allow_plus = false;
+ let allow_group_generic = false;
+ let ty = ty::parsing::ambig_ty(input, allow_plus, allow_group_generic)?;
+ check_cast(input)?;
+ lhs = Expr::Cast(ExprCast {
+ attrs: Vec::new(),
+ expr: Box::new(lhs),
+ as_token,
+ ty: Box::new(ty),
+ });
+ } else if Precedence::Cast >= base && input.peek(Token![:]) && !input.peek(Token![::]) {
+ let colon_token: Token![:] = input.parse()?;
+ let allow_plus = false;
+ let allow_group_generic = false;
+ let ty = ty::parsing::ambig_ty(input, allow_plus, allow_group_generic)?;
+ check_cast(input)?;
+ lhs = Expr::Type(ExprType {
+ attrs: Vec::new(),
+ expr: Box::new(lhs),
+ colon_token,
+ ty: Box::new(ty),
+ });
+ } else {
+ break;
+ }
+ }
+ Ok(lhs)
+ }
+
+ #[cfg(not(feature = "full"))]
+ fn parse_expr(
+ input: ParseStream,
+ mut lhs: Expr,
+ allow_struct: AllowStruct,
+ base: Precedence,
+ ) -> Result<Expr> {
+ loop {
+ if input
+ .fork()
+ .parse::<BinOp>()
+ .ok()
+ .map_or(false, |op| Precedence::of(&op) >= base)
+ {
+ let op: BinOp = input.parse()?;
+ let precedence = Precedence::of(&op);
+ let mut rhs = unary_expr(input, allow_struct)?;
+ loop {
+ let next = peek_precedence(input);
+ if next > precedence || next == precedence && precedence == Precedence::Assign {
+ rhs = parse_expr(input, rhs, allow_struct, next)?;
+ } else {
+ break;
+ }
+ }
+ lhs = Expr::Binary(ExprBinary {
+ attrs: Vec::new(),
+ left: Box::new(lhs),
+ op,
+ right: Box::new(rhs),
+ });
+ } else if Precedence::Cast >= base && input.peek(Token![as]) {
+ let as_token: Token![as] = input.parse()?;
+ let allow_plus = false;
+ let allow_group_generic = false;
+ let ty = ty::parsing::ambig_ty(input, allow_plus, allow_group_generic)?;
+ check_cast(input)?;
+ lhs = Expr::Cast(ExprCast {
+ attrs: Vec::new(),
+ expr: Box::new(lhs),
+ as_token,
+ ty: Box::new(ty),
+ });
+ } else {
+ break;
+ }
+ }
+ Ok(lhs)
+ }
+
+ fn peek_precedence(input: ParseStream) -> Precedence {
+ if let Ok(op) = input.fork().parse() {
+ Precedence::of(&op)
+ } else if input.peek(Token![=]) && !input.peek(Token![=>]) {
+ Precedence::Assign
+ } else if input.peek(Token![..]) {
+ Precedence::Range
+ } else if input.peek(Token![as])
+ || cfg!(feature = "full") && input.peek(Token![:]) && !input.peek(Token![::])
+ {
+ Precedence::Cast
+ } else {
+ Precedence::Any
+ }
+ }
+
+ // Parse an arbitrary expression.
+ fn ambiguous_expr(input: ParseStream, allow_struct: AllowStruct) -> Result<Expr> {
+ let lhs = unary_expr(input, allow_struct)?;
+ parse_expr(input, lhs, allow_struct, Precedence::Any)
+ }
+
+ #[cfg(feature = "full")]
+ fn expr_attrs(input: ParseStream) -> Result<Vec<Attribute>> {
+ let mut attrs = Vec::new();
+ loop {
+ if input.peek(token::Group) {
+ let ahead = input.fork();
+ let group = crate::group::parse_group(&ahead)?;
+ if !group.content.peek(Token![#]) || group.content.peek2(Token![!]) {
+ break;
+ }
+ let attr = group.content.call(attr::parsing::single_parse_outer)?;
+ if !group.content.is_empty() {
+ break;
+ }
+ attrs.push(attr);
+ } else if input.peek(Token![#]) {
+ attrs.push(input.call(attr::parsing::single_parse_outer)?);
+ } else {
+ break;
+ }
+ }
+ Ok(attrs)
+ }
+
+ // <UnOp> <trailer>
+ // & <trailer>
+ // &mut <trailer>
+ // box <trailer>
+ #[cfg(feature = "full")]
+ fn unary_expr(input: ParseStream, allow_struct: AllowStruct) -> Result<Expr> {
+ let begin = input.fork();
+ let attrs = input.call(expr_attrs)?;
+ if input.peek(Token![&]) {
+ let and_token: Token![&] = input.parse()?;
+ let raw: Option<raw> =
+ if input.peek(raw) && (input.peek2(Token![mut]) || input.peek2(Token![const])) {
+ Some(input.parse()?)
+ } else {
+ None
+ };
+ let mutability: Option<Token![mut]> = input.parse()?;
+ if raw.is_some() && mutability.is_none() {
+ input.parse::<Token![const]>()?;
+ }
+ let expr = Box::new(unary_expr(input, allow_struct)?);
+ if raw.is_some() {
+ Ok(Expr::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Ok(Expr::Reference(ExprReference {
+ attrs,
+ and_token,
+ raw: Reserved::default(),
+ mutability,
+ expr,
+ }))
+ }
+ } else if input.peek(Token![box]) {
+ expr_box(input, attrs, allow_struct).map(Expr::Box)
+ } else if input.peek(Token![*]) || input.peek(Token![!]) || input.peek(Token![-]) {
+ expr_unary(input, attrs, allow_struct).map(Expr::Unary)
+ } else {
+ trailer_expr(begin, attrs, input, allow_struct)
+ }
+ }
+
+ #[cfg(not(feature = "full"))]
+ fn unary_expr(input: ParseStream, allow_struct: AllowStruct) -> Result<Expr> {
+ if input.peek(Token![*]) || input.peek(Token![!]) || input.peek(Token![-]) {
+ Ok(Expr::Unary(ExprUnary {
+ attrs: Vec::new(),
+ op: input.parse()?,
+ expr: Box::new(unary_expr(input, allow_struct)?),
+ }))
+ } else {
+ trailer_expr(input, allow_struct)
+ }
+ }
+
+ // <atom> (..<args>) ...
+ // <atom> . <ident> (..<args>) ...
+ // <atom> . <ident> ...
+ // <atom> . <lit> ...
+ // <atom> [ <expr> ] ...
+ // <atom> ? ...
+ #[cfg(feature = "full")]
+ fn trailer_expr(
+ begin: ParseBuffer,
+ mut attrs: Vec<Attribute>,
+ input: ParseStream,
+ allow_struct: AllowStruct,
+ ) -> Result<Expr> {
+ let atom = atom_expr(input, allow_struct)?;
+ let mut e = trailer_helper(input, atom)?;
+
+ if let Expr::Verbatim(tokens) = &mut e {
+ *tokens = verbatim::between(begin, input);
+ } else {
+ let inner_attrs = e.replace_attrs(Vec::new());
+ attrs.extend(inner_attrs);
+ e.replace_attrs(attrs);
+ }
+
+ Ok(e)
+ }
+
+ #[cfg(feature = "full")]
+ fn trailer_helper(input: ParseStream, mut e: Expr) -> Result<Expr> {
+ loop {
+ if input.peek(token::Paren) {
+ let content;
+ e = Expr::Call(ExprCall {
+ attrs: Vec::new(),
+ func: Box::new(e),
+ paren_token: parenthesized!(content in input),
+ args: content.parse_terminated(Expr::parse)?,
+ });
+ } else if input.peek(Token![.])
+ && !input.peek(Token![..])
+ && match e {
+ Expr::Range(_) => false,
+ _ => true,
+ }
+ {
+ let mut dot_token: Token![.] = input.parse()?;
+
+ let await_token: Option<token::Await> = input.parse()?;
+ if let Some(await_token) = await_token {
+ e = Expr::Await(ExprAwait {
+ attrs: Vec::new(),
+ base: Box::new(e),
+ dot_token,
+ await_token,
+ });
+ continue;
+ }
+
+ let float_token: Option<LitFloat> = input.parse()?;
+ if let Some(float_token) = float_token {
+ if multi_index(&mut e, &mut dot_token, float_token)? {
+ continue;
+ }
+ }
+
+ let member: Member = input.parse()?;
+ let turbofish = if member.is_named() && input.peek(Token![::]) {
+ Some(input.parse::<MethodTurbofish>()?)
+ } else {
+ None
+ };
+
+ if turbofish.is_some() || input.peek(token::Paren) {
+ if let Member::Named(method) = member {
+ let content;
+ e = Expr::MethodCall(ExprMethodCall {
+ attrs: Vec::new(),
+ receiver: Box::new(e),
+ dot_token,
+ method,
+ turbofish,
+ paren_token: parenthesized!(content in input),
+ args: content.parse_terminated(Expr::parse)?,
+ });
+ continue;
+ }
+ }
+
+ e = Expr::Field(ExprField {
+ attrs: Vec::new(),
+ base: Box::new(e),
+ dot_token,
+ member,
+ });
+ } else if input.peek(token::Bracket) {
+ let content;
+ e = Expr::Index(ExprIndex {
+ attrs: Vec::new(),
+ expr: Box::new(e),
+ bracket_token: bracketed!(content in input),
+ index: content.parse()?,
+ });
+ } else if input.peek(Token![?]) {
+ e = Expr::Try(ExprTry {
+ attrs: Vec::new(),
+ expr: Box::new(e),
+ question_token: input.parse()?,
+ });
+ } else {
+ break;
+ }
+ }
+ Ok(e)
+ }
+
+ #[cfg(not(feature = "full"))]
+ fn trailer_expr(input: ParseStream, allow_struct: AllowStruct) -> Result<Expr> {
+ let mut e = atom_expr(input, allow_struct)?;
+
+ loop {
+ if input.peek(token::Paren) {
+ let content;
+ e = Expr::Call(ExprCall {
+ attrs: Vec::new(),
+ func: Box::new(e),
+ paren_token: parenthesized!(content in input),
+ args: content.parse_terminated(Expr::parse)?,
+ });
+ } else if input.peek(Token![.]) && !input.peek(Token![..]) && !input.peek2(token::Await)
+ {
+ let mut dot_token: Token![.] = input.parse()?;
+ let float_token: Option<LitFloat> = input.parse()?;
+ if let Some(float_token) = float_token {
+ if multi_index(&mut e, &mut dot_token, float_token)? {
+ continue;
+ }
+ }
+ e = Expr::Field(ExprField {
+ attrs: Vec::new(),
+ base: Box::new(e),
+ dot_token,
+ member: input.parse()?,
+ });
+ } else if input.peek(token::Bracket) {
+ let content;
+ e = Expr::Index(ExprIndex {
+ attrs: Vec::new(),
+ expr: Box::new(e),
+ bracket_token: bracketed!(content in input),
+ index: content.parse()?,
+ });
+ } else {
+ break;
+ }
+ }
+
+ Ok(e)
+ }
+
+ // Parse all atomic expressions which don't have to worry about precedence
+ // interactions, as they are fully contained.
+ #[cfg(feature = "full")]
+ fn atom_expr(input: ParseStream, allow_struct: AllowStruct) -> Result<Expr> {
+ if input.peek(token::Group)
+ && !input.peek2(Token![::])
+ && !input.peek2(Token![!])
+ && !input.peek2(token::Brace)
+ {
+ input.call(expr_group).map(Expr::Group)
+ } else if input.peek(Lit) {
+ input.parse().map(Expr::Lit)
+ } else if input.peek(Token![async])
+ && (input.peek2(token::Brace) || input.peek2(Token![move]) && input.peek3(token::Brace))
+ {
+ input.parse().map(Expr::Async)
+ } else if input.peek(Token![try]) && input.peek2(token::Brace) {
+ input.parse().map(Expr::TryBlock)
+ } else if input.peek(Token![|])
+ || input.peek(Token![async]) && (input.peek2(Token![|]) || input.peek2(Token![move]))
+ || input.peek(Token![static])
+ || input.peek(Token![move])
+ {
+ expr_closure(input, allow_struct).map(Expr::Closure)
+ } else if input.peek(Token![for])
+ && input.peek2(Token![<])
+ && (input.peek3(Lifetime) || input.peek3(Token![>]))
+ {
+ let begin = input.fork();
+ input.parse::<BoundLifetimes>()?;
+ expr_closure(input, allow_struct)?;
+ let verbatim = verbatim::between(begin, input);
+ Ok(Expr::Verbatim(verbatim))
+ } else if input.peek(Ident)
+ || input.peek(Token![::])
+ || input.peek(Token![<])
+ || input.peek(Token![self])
+ || input.peek(Token![Self])
+ || input.peek(Token![super])
+ || input.peek(Token![crate])
+ {
+ path_or_macro_or_struct(input, allow_struct)
+ } else if input.peek(token::Paren) {
+ paren_or_tuple(input)
+ } else if input.peek(Token![break]) {
+ expr_break(input, allow_struct).map(Expr::Break)
+ } else if input.peek(Token![continue]) {
+ input.parse().map(Expr::Continue)
+ } else if input.peek(Token![return]) {
+ expr_ret(input, allow_struct).map(Expr::Return)
+ } else if input.peek(token::Bracket) {
+ array_or_repeat(input)
+ } else if input.peek(Token![let]) {
+ input.parse().map(Expr::Let)
+ } else if input.peek(Token![if]) {
+ input.parse().map(Expr::If)
+ } else if input.peek(Token![while]) {
+ input.parse().map(Expr::While)
+ } else if input.peek(Token![for]) {
+ input.parse().map(Expr::ForLoop)
+ } else if input.peek(Token![loop]) {
+ input.parse().map(Expr::Loop)
+ } else if input.peek(Token![match]) {
+ input.parse().map(Expr::Match)
+ } else if input.peek(Token![yield]) {
+ input.parse().map(Expr::Yield)
+ } else if input.peek(Token![unsafe]) {
+ input.parse().map(Expr::Unsafe)
+ } else if input.peek(Token![const]) {
+ input.call(expr_const).map(Expr::Verbatim)
+ } else if input.peek(token::Brace) {
+ input.parse().map(Expr::Block)
+ } else if input.peek(Token![..]) {
+ expr_range(input, allow_struct).map(Expr::Range)
+ } else if input.peek(Token![_]) {
+ Ok(Expr::Verbatim(TokenStream::from(
+ input.parse::<TokenTree>()?,
+ )))
+ } else if input.peek(Lifetime) {
+ let the_label: Label = input.parse()?;
+ let mut expr = if input.peek(Token![while]) {
+ Expr::While(input.parse()?)
+ } else if input.peek(Token![for]) {
+ Expr::ForLoop(input.parse()?)
+ } else if input.peek(Token![loop]) {
+ Expr::Loop(input.parse()?)
+ } else if input.peek(token::Brace) {
+ Expr::Block(input.parse()?)
+ } else {
+ return Err(input.error("expected loop or block expression"));
+ };
+ match &mut expr {
+ Expr::While(ExprWhile { label, .. })
+ | Expr::ForLoop(ExprForLoop { label, .. })
+ | Expr::Loop(ExprLoop { label, .. })
+ | Expr::Block(ExprBlock { label, .. }) => *label = Some(the_label),
+ _ => unreachable!(),
+ }
+ Ok(expr)
+ } else {
+ Err(input.error("expected expression"))
+ }
+ }
+
+ #[cfg(not(feature = "full"))]
+ fn atom_expr(input: ParseStream, _allow_struct: AllowStruct) -> Result<Expr> {
+ if input.peek(Lit) {
+ input.parse().map(Expr::Lit)
+ } else if input.peek(token::Paren) {
+ input.call(expr_paren).map(Expr::Paren)
+ } else if input.peek(Ident)
+ || input.peek(Token![::])
+ || input.peek(Token![<])
+ || input.peek(Token![self])
+ || input.peek(Token![Self])
+ || input.peek(Token![super])
+ || input.peek(Token![crate])
+ {
+ input.parse().map(Expr::Path)
+ } else {
+ Err(input.error("unsupported expression; enable syn's features=[\"full\"]"))
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn path_or_macro_or_struct(input: ParseStream, allow_struct: AllowStruct) -> Result<Expr> {
+ let begin = input.fork();
+ let expr: ExprPath = input.parse()?;
+
+ if expr.qself.is_none() && input.peek(Token![!]) && !input.peek(Token![!=]) {
+ let mut contains_arguments = false;
+ for segment in &expr.path.segments {
+ match segment.arguments {
+ PathArguments::None => {}
+ PathArguments::AngleBracketed(_) | PathArguments::Parenthesized(_) => {
+ contains_arguments = true;
+ }
+ }
+ }
+
+ if !contains_arguments {
+ let bang_token: Token![!] = input.parse()?;
+ let (delimiter, tokens) = mac::parse_delimiter(input)?;
+ return Ok(Expr::Macro(ExprMacro {
+ attrs: Vec::new(),
+ mac: Macro {
+ path: expr.path,
+ bang_token,
+ delimiter,
+ tokens,
+ },
+ }));
+ }
+ }
+
+ if allow_struct.0 && input.peek(token::Brace) {
+ let expr_struct = expr_struct_helper(input, expr.path)?;
+ if expr.qself.is_some() {
+ Ok(Expr::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Ok(Expr::Struct(expr_struct))
+ }
+ } else {
+ Ok(Expr::Path(expr))
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprMacro {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ExprMacro {
+ attrs: Vec::new(),
+ mac: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn paren_or_tuple(input: ParseStream) -> Result<Expr> {
+ let content;
+ let paren_token = parenthesized!(content in input);
+ if content.is_empty() {
+ return Ok(Expr::Tuple(ExprTuple {
+ attrs: Vec::new(),
+ paren_token,
+ elems: Punctuated::new(),
+ }));
+ }
+
+ let first: Expr = content.parse()?;
+ if content.is_empty() {
+ return Ok(Expr::Paren(ExprParen {
+ attrs: Vec::new(),
+ paren_token,
+ expr: Box::new(first),
+ }));
+ }
+
+ let mut elems = Punctuated::new();
+ elems.push_value(first);
+ while !content.is_empty() {
+ let punct = content.parse()?;
+ elems.push_punct(punct);
+ if content.is_empty() {
+ break;
+ }
+ let value = content.parse()?;
+ elems.push_value(value);
+ }
+ Ok(Expr::Tuple(ExprTuple {
+ attrs: Vec::new(),
+ paren_token,
+ elems,
+ }))
+ }
+
+ #[cfg(feature = "full")]
+ fn array_or_repeat(input: ParseStream) -> Result<Expr> {
+ let content;
+ let bracket_token = bracketed!(content in input);
+ if content.is_empty() {
+ return Ok(Expr::Array(ExprArray {
+ attrs: Vec::new(),
+ bracket_token,
+ elems: Punctuated::new(),
+ }));
+ }
+
+ let first: Expr = content.parse()?;
+ if content.is_empty() || content.peek(Token![,]) {
+ let mut elems = Punctuated::new();
+ elems.push_value(first);
+ while !content.is_empty() {
+ let punct = content.parse()?;
+ elems.push_punct(punct);
+ if content.is_empty() {
+ break;
+ }
+ let value = content.parse()?;
+ elems.push_value(value);
+ }
+ Ok(Expr::Array(ExprArray {
+ attrs: Vec::new(),
+ bracket_token,
+ elems,
+ }))
+ } else if content.peek(Token![;]) {
+ let semi_token: Token![;] = content.parse()?;
+ let len: Expr = content.parse()?;
+ Ok(Expr::Repeat(ExprRepeat {
+ attrs: Vec::new(),
+ bracket_token,
+ expr: Box::new(first),
+ semi_token,
+ len: Box::new(len),
+ }))
+ } else {
+ Err(content.error("expected `,` or `;`"))
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprArray {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let content;
+ let bracket_token = bracketed!(content in input);
+ let mut elems = Punctuated::new();
+
+ while !content.is_empty() {
+ let first: Expr = content.parse()?;
+ elems.push_value(first);
+ if content.is_empty() {
+ break;
+ }
+ let punct = content.parse()?;
+ elems.push_punct(punct);
+ }
+
+ Ok(ExprArray {
+ attrs: Vec::new(),
+ bracket_token,
+ elems,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprRepeat {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let content;
+ Ok(ExprRepeat {
+ bracket_token: bracketed!(content in input),
+ attrs: Vec::new(),
+ expr: content.parse()?,
+ semi_token: content.parse()?,
+ len: content.parse()?,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ pub(crate) fn expr_early(input: ParseStream) -> Result<Expr> {
+ let mut attrs = input.call(expr_attrs)?;
+ let mut expr = if input.peek(Token![if]) {
+ Expr::If(input.parse()?)
+ } else if input.peek(Token![while]) {
+ Expr::While(input.parse()?)
+ } else if input.peek(Token![for])
+ && !(input.peek2(Token![<]) && (input.peek3(Lifetime) || input.peek3(Token![>])))
+ {
+ Expr::ForLoop(input.parse()?)
+ } else if input.peek(Token![loop]) {
+ Expr::Loop(input.parse()?)
+ } else if input.peek(Token![match]) {
+ Expr::Match(input.parse()?)
+ } else if input.peek(Token![try]) && input.peek2(token::Brace) {
+ Expr::TryBlock(input.parse()?)
+ } else if input.peek(Token![unsafe]) {
+ Expr::Unsafe(input.parse()?)
+ } else if input.peek(Token![const]) {
+ Expr::Verbatim(input.call(expr_const)?)
+ } else if input.peek(token::Brace) {
+ Expr::Block(input.parse()?)
+ } else {
+ let allow_struct = AllowStruct(true);
+ let mut expr = unary_expr(input, allow_struct)?;
+
+ attrs.extend(expr.replace_attrs(Vec::new()));
+ expr.replace_attrs(attrs);
+
+ return parse_expr(input, expr, allow_struct, Precedence::Any);
+ };
+
+ if input.peek(Token![.]) && !input.peek(Token![..]) || input.peek(Token![?]) {
+ expr = trailer_helper(input, expr)?;
+
+ attrs.extend(expr.replace_attrs(Vec::new()));
+ expr.replace_attrs(attrs);
+
+ let allow_struct = AllowStruct(true);
+ return parse_expr(input, expr, allow_struct, Precedence::Any);
+ }
+
+ attrs.extend(expr.replace_attrs(Vec::new()));
+ expr.replace_attrs(attrs);
+ Ok(expr)
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprLit {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ExprLit {
+ attrs: Vec::new(),
+ lit: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn expr_group(input: ParseStream) -> Result<ExprGroup> {
+ let group = crate::group::parse_group(input)?;
+ Ok(ExprGroup {
+ attrs: Vec::new(),
+ group_token: group.token,
+ expr: group.content.parse()?,
+ })
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprParen {
+ fn parse(input: ParseStream) -> Result<Self> {
+ expr_paren(input)
+ }
+ }
+
+ fn expr_paren(input: ParseStream) -> Result<ExprParen> {
+ let content;
+ Ok(ExprParen {
+ attrs: Vec::new(),
+ paren_token: parenthesized!(content in input),
+ expr: content.parse()?,
+ })
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for GenericMethodArgument {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Lit) {
+ let lit = input.parse()?;
+ return Ok(GenericMethodArgument::Const(Expr::Lit(lit)));
+ }
+
+ if input.peek(token::Brace) {
+ let block: ExprBlock = input.parse()?;
+ return Ok(GenericMethodArgument::Const(Expr::Block(block)));
+ }
+
+ input.parse().map(GenericMethodArgument::Type)
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for MethodTurbofish {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(MethodTurbofish {
+ colon2_token: input.parse()?,
+ lt_token: input.parse()?,
+ args: {
+ let mut args = Punctuated::new();
+ loop {
+ if input.peek(Token![>]) {
+ break;
+ }
+ let value: GenericMethodArgument = input.parse()?;
+ args.push_value(value);
+ if input.peek(Token![>]) {
+ break;
+ }
+ let punct = input.parse()?;
+ args.push_punct(punct);
+ }
+ args
+ },
+ gt_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprLet {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ExprLet {
+ attrs: Vec::new(),
+ let_token: input.parse()?,
+ pat: pat::parsing::multi_pat_with_leading_vert(input)?,
+ eq_token: input.parse()?,
+ expr: Box::new({
+ let allow_struct = AllowStruct(false);
+ let lhs = unary_expr(input, allow_struct)?;
+ parse_expr(input, lhs, allow_struct, Precedence::Compare)?
+ }),
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprIf {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ Ok(ExprIf {
+ attrs,
+ if_token: input.parse()?,
+ cond: Box::new(input.call(Expr::parse_without_eager_brace)?),
+ then_branch: input.parse()?,
+ else_branch: {
+ if input.peek(Token![else]) {
+ Some(input.call(else_block)?)
+ } else {
+ None
+ }
+ },
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn else_block(input: ParseStream) -> Result<(Token![else], Box<Expr>)> {
+ let else_token: Token![else] = input.parse()?;
+
+ let lookahead = input.lookahead1();
+ let else_branch = if input.peek(Token![if]) {
+ input.parse().map(Expr::If)?
+ } else if input.peek(token::Brace) {
+ Expr::Block(ExprBlock {
+ attrs: Vec::new(),
+ label: None,
+ block: input.parse()?,
+ })
+ } else {
+ return Err(lookahead.error());
+ };
+
+ Ok((else_token, Box::new(else_branch)))
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprForLoop {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let label: Option<Label> = input.parse()?;
+ let for_token: Token![for] = input.parse()?;
+
+ let pat = pat::parsing::multi_pat_with_leading_vert(input)?;
+
+ let in_token: Token![in] = input.parse()?;
+ let expr: Expr = input.call(Expr::parse_without_eager_brace)?;
+
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+ let stmts = content.call(Block::parse_within)?;
+
+ Ok(ExprForLoop {
+ attrs,
+ label,
+ for_token,
+ pat,
+ in_token,
+ expr: Box::new(expr),
+ body: Block { brace_token, stmts },
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprLoop {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let label: Option<Label> = input.parse()?;
+ let loop_token: Token![loop] = input.parse()?;
+
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+ let stmts = content.call(Block::parse_within)?;
+
+ Ok(ExprLoop {
+ attrs,
+ label,
+ loop_token,
+ body: Block { brace_token, stmts },
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprMatch {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let match_token: Token![match] = input.parse()?;
+ let expr = Expr::parse_without_eager_brace(input)?;
+
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+
+ let mut arms = Vec::new();
+ while !content.is_empty() {
+ arms.push(content.call(Arm::parse)?);
+ }
+
+ Ok(ExprMatch {
+ attrs,
+ match_token,
+ expr: Box::new(expr),
+ brace_token,
+ arms,
+ })
+ }
+ }
+
+ macro_rules! impl_by_parsing_expr {
+ (
+ $(
+ $expr_type:ty, $variant:ident, $msg:expr,
+ )*
+ ) => {
+ $(
+ #[cfg(all(feature = "full", feature = "printing"))]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for $expr_type {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut expr: Expr = input.parse()?;
+ loop {
+ match expr {
+ Expr::$variant(inner) => return Ok(inner),
+ Expr::Group(next) => expr = *next.expr,
+ _ => return Err(Error::new_spanned(expr, $msg)),
+ }
+ }
+ }
+ }
+ )*
+ };
+ }
+
+ impl_by_parsing_expr! {
+ ExprAssign, Assign, "expected assignment expression",
+ ExprAssignOp, AssignOp, "expected compound assignment expression",
+ ExprAwait, Await, "expected await expression",
+ ExprBinary, Binary, "expected binary operation",
+ ExprCall, Call, "expected function call expression",
+ ExprCast, Cast, "expected cast expression",
+ ExprField, Field, "expected struct field access",
+ ExprIndex, Index, "expected indexing expression",
+ ExprMethodCall, MethodCall, "expected method call expression",
+ ExprRange, Range, "expected range expression",
+ ExprTry, Try, "expected try expression",
+ ExprTuple, Tuple, "expected tuple expression",
+ ExprType, Type, "expected type ascription expression",
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprBox {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = Vec::new();
+ let allow_struct = AllowStruct(true);
+ expr_box(input, attrs, allow_struct)
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn expr_box(
+ input: ParseStream,
+ attrs: Vec<Attribute>,
+ allow_struct: AllowStruct,
+ ) -> Result<ExprBox> {
+ Ok(ExprBox {
+ attrs,
+ box_token: input.parse()?,
+ expr: Box::new(unary_expr(input, allow_struct)?),
+ })
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprUnary {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = Vec::new();
+ let allow_struct = AllowStruct(true);
+ expr_unary(input, attrs, allow_struct)
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn expr_unary(
+ input: ParseStream,
+ attrs: Vec<Attribute>,
+ allow_struct: AllowStruct,
+ ) -> Result<ExprUnary> {
+ Ok(ExprUnary {
+ attrs,
+ op: input.parse()?,
+ expr: Box::new(unary_expr(input, allow_struct)?),
+ })
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprClosure {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_struct = AllowStruct(true);
+ expr_closure(input, allow_struct)
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprReference {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_struct = AllowStruct(true);
+ Ok(ExprReference {
+ attrs: Vec::new(),
+ and_token: input.parse()?,
+ raw: Reserved::default(),
+ mutability: input.parse()?,
+ expr: Box::new(unary_expr(input, allow_struct)?),
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprBreak {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_struct = AllowStruct(true);
+ expr_break(input, allow_struct)
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprReturn {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_struct = AllowStruct(true);
+ expr_ret(input, allow_struct)
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprTryBlock {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ExprTryBlock {
+ attrs: Vec::new(),
+ try_token: input.parse()?,
+ block: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprYield {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ExprYield {
+ attrs: Vec::new(),
+ yield_token: input.parse()?,
+ expr: {
+ if !input.is_empty() && !input.peek(Token![,]) && !input.peek(Token![;]) {
+ Some(input.parse()?)
+ } else {
+ None
+ }
+ },
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn expr_closure(input: ParseStream, allow_struct: AllowStruct) -> Result<ExprClosure> {
+ let movability: Option<Token![static]> = input.parse()?;
+ let asyncness: Option<Token![async]> = input.parse()?;
+ let capture: Option<Token![move]> = input.parse()?;
+ let or1_token: Token![|] = input.parse()?;
+
+ let mut inputs = Punctuated::new();
+ loop {
+ if input.peek(Token![|]) {
+ break;
+ }
+ let value = closure_arg(input)?;
+ inputs.push_value(value);
+ if input.peek(Token![|]) {
+ break;
+ }
+ let punct: Token![,] = input.parse()?;
+ inputs.push_punct(punct);
+ }
+
+ let or2_token: Token![|] = input.parse()?;
+
+ let (output, body) = if input.peek(Token![->]) {
+ let arrow_token: Token![->] = input.parse()?;
+ let ty: Type = input.parse()?;
+ let body: Block = input.parse()?;
+ let output = ReturnType::Type(arrow_token, Box::new(ty));
+ let block = Expr::Block(ExprBlock {
+ attrs: Vec::new(),
+ label: None,
+ block: body,
+ });
+ (output, block)
+ } else {
+ let body = ambiguous_expr(input, allow_struct)?;
+ (ReturnType::Default, body)
+ };
+
+ Ok(ExprClosure {
+ attrs: Vec::new(),
+ movability,
+ asyncness,
+ capture,
+ or1_token,
+ inputs,
+ or2_token,
+ output,
+ body: Box::new(body),
+ })
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprAsync {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ExprAsync {
+ attrs: Vec::new(),
+ async_token: input.parse()?,
+ capture: input.parse()?,
+ block: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn closure_arg(input: ParseStream) -> Result<Pat> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let mut pat: Pat = input.parse()?;
+
+ if input.peek(Token![:]) {
+ Ok(Pat::Type(PatType {
+ attrs,
+ pat: Box::new(pat),
+ colon_token: input.parse()?,
+ ty: input.parse()?,
+ }))
+ } else {
+ match &mut pat {
+ Pat::Box(pat) => pat.attrs = attrs,
+ Pat::Ident(pat) => pat.attrs = attrs,
+ Pat::Lit(pat) => pat.attrs = attrs,
+ Pat::Macro(pat) => pat.attrs = attrs,
+ Pat::Or(pat) => pat.attrs = attrs,
+ Pat::Path(pat) => pat.attrs = attrs,
+ Pat::Range(pat) => pat.attrs = attrs,
+ Pat::Reference(pat) => pat.attrs = attrs,
+ Pat::Rest(pat) => pat.attrs = attrs,
+ Pat::Slice(pat) => pat.attrs = attrs,
+ Pat::Struct(pat) => pat.attrs = attrs,
+ Pat::Tuple(pat) => pat.attrs = attrs,
+ Pat::TupleStruct(pat) => pat.attrs = attrs,
+ Pat::Type(_) => unreachable!(),
+ Pat::Verbatim(_) => {}
+ Pat::Wild(pat) => pat.attrs = attrs,
+
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ Ok(pat)
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprWhile {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let label: Option<Label> = input.parse()?;
+ let while_token: Token![while] = input.parse()?;
+ let cond = Expr::parse_without_eager_brace(input)?;
+
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+ let stmts = content.call(Block::parse_within)?;
+
+ Ok(ExprWhile {
+ attrs,
+ label,
+ while_token,
+ cond: Box::new(cond),
+ body: Block { brace_token, stmts },
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Label {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(Label {
+ name: input.parse()?,
+ colon_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Option<Label> {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Lifetime) {
+ input.parse().map(Some)
+ } else {
+ Ok(None)
+ }
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprContinue {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ExprContinue {
+ attrs: Vec::new(),
+ continue_token: input.parse()?,
+ label: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn expr_break(input: ParseStream, allow_struct: AllowStruct) -> Result<ExprBreak> {
+ Ok(ExprBreak {
+ attrs: Vec::new(),
+ break_token: input.parse()?,
+ label: input.parse()?,
+ expr: {
+ if input.is_empty()
+ || input.peek(Token![,])
+ || input.peek(Token![;])
+ || !allow_struct.0 && input.peek(token::Brace)
+ {
+ None
+ } else {
+ let expr = ambiguous_expr(input, allow_struct)?;
+ Some(Box::new(expr))
+ }
+ },
+ })
+ }
+
+ #[cfg(feature = "full")]
+ fn expr_ret(input: ParseStream, allow_struct: AllowStruct) -> Result<ExprReturn> {
+ Ok(ExprReturn {
+ attrs: Vec::new(),
+ return_token: input.parse()?,
+ expr: {
+ if input.is_empty() || input.peek(Token![,]) || input.peek(Token![;]) {
+ None
+ } else {
+ // NOTE: return is greedy and eats blocks after it even when in a
+ // position where structs are not allowed, such as in if statement
+ // conditions. For example:
+ //
+ // if return { println!("A") } {} // Prints "A"
+ let expr = ambiguous_expr(input, allow_struct)?;
+ Some(Box::new(expr))
+ }
+ },
+ })
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for FieldValue {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let member: Member = input.parse()?;
+ let (colon_token, value) = if input.peek(Token![:]) || !member.is_named() {
+ let colon_token: Token![:] = input.parse()?;
+ let value: Expr = input.parse()?;
+ (Some(colon_token), value)
+ } else if let Member::Named(ident) = &member {
+ let value = Expr::Path(ExprPath {
+ attrs: Vec::new(),
+ qself: None,
+ path: Path::from(ident.clone()),
+ });
+ (None, value)
+ } else {
+ unreachable!()
+ };
+
+ Ok(FieldValue {
+ attrs,
+ member,
+ colon_token,
+ expr: value,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprStruct {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let path: Path = input.parse()?;
+ expr_struct_helper(input, path)
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn expr_struct_helper(input: ParseStream, path: Path) -> Result<ExprStruct> {
+ let content;
+ let brace_token = braced!(content in input);
+
+ let mut fields = Punctuated::new();
+ while !content.is_empty() {
+ if content.peek(Token![..]) {
+ return Ok(ExprStruct {
+ attrs: Vec::new(),
+ brace_token,
+ path,
+ fields,
+ dot2_token: Some(content.parse()?),
+ rest: if content.is_empty() {
+ None
+ } else {
+ Some(Box::new(content.parse()?))
+ },
+ });
+ }
+
+ fields.push(content.parse()?);
+ if content.is_empty() {
+ break;
+ }
+ let punct: Token![,] = content.parse()?;
+ fields.push_punct(punct);
+ }
+
+ Ok(ExprStruct {
+ attrs: Vec::new(),
+ brace_token,
+ path,
+ fields,
+ dot2_token: None,
+ rest: None,
+ })
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprUnsafe {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let unsafe_token: Token![unsafe] = input.parse()?;
+
+ let content;
+ let brace_token = braced!(content in input);
+ let inner_attrs = content.call(Attribute::parse_inner)?;
+ let stmts = content.call(Block::parse_within)?;
+
+ Ok(ExprUnsafe {
+ attrs: inner_attrs,
+ unsafe_token,
+ block: Block { brace_token, stmts },
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ pub(crate) fn expr_const(input: ParseStream) -> Result<TokenStream> {
+ let begin = input.fork();
+ input.parse::<Token![const]>()?;
+
+ let content;
+ braced!(content in input);
+ content.call(Attribute::parse_inner)?;
+ content.call(Block::parse_within)?;
+
+ Ok(verbatim::between(begin, input))
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprBlock {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let label: Option<Label> = input.parse()?;
+
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+ let stmts = content.call(Block::parse_within)?;
+
+ Ok(ExprBlock {
+ attrs,
+ label,
+ block: Block { brace_token, stmts },
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn expr_range(input: ParseStream, allow_struct: AllowStruct) -> Result<ExprRange> {
+ Ok(ExprRange {
+ attrs: Vec::new(),
+ from: None,
+ limits: input.parse()?,
+ to: {
+ if input.is_empty()
+ || input.peek(Token![,])
+ || input.peek(Token![;])
+ || input.peek(Token![.]) && !input.peek(Token![..])
+ || !allow_struct.0 && input.peek(token::Brace)
+ {
+ None
+ } else {
+ let to = ambiguous_expr(input, allow_struct)?;
+ Some(Box::new(to))
+ }
+ },
+ })
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for RangeLimits {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Token![..=]) {
+ input.parse().map(RangeLimits::Closed)
+ } else if lookahead.peek(Token![...]) {
+ let dot3: Token![...] = input.parse()?;
+ Ok(RangeLimits::Closed(Token![..=](dot3.spans)))
+ } else if lookahead.peek(Token![..]) {
+ input.parse().map(RangeLimits::HalfOpen)
+ } else {
+ Err(lookahead.error())
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ExprPath {
+ fn parse(input: ParseStream) -> Result<Self> {
+ #[cfg(not(feature = "full"))]
+ let attrs = Vec::new();
+ #[cfg(feature = "full")]
+ let attrs = input.call(Attribute::parse_outer)?;
+
+ let (qself, path) = path::parsing::qpath(input, true)?;
+
+ Ok(ExprPath { attrs, qself, path })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Member {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Ident) {
+ input.parse().map(Member::Named)
+ } else if input.peek(LitInt) {
+ input.parse().map(Member::Unnamed)
+ } else {
+ Err(input.error("expected identifier or integer"))
+ }
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Arm {
+ fn parse(input: ParseStream) -> Result<Arm> {
+ let requires_comma;
+ Ok(Arm {
+ attrs: input.call(Attribute::parse_outer)?,
+ pat: pat::parsing::multi_pat_with_leading_vert(input)?,
+ guard: {
+ if input.peek(Token![if]) {
+ let if_token: Token![if] = input.parse()?;
+ let guard: Expr = input.parse()?;
+ Some((if_token, Box::new(guard)))
+ } else {
+ None
+ }
+ },
+ fat_arrow_token: input.parse()?,
+ body: {
+ let body = input.call(expr_early)?;
+ requires_comma = requires_terminator(&body);
+ Box::new(body)
+ },
+ comma: {
+ if requires_comma && !input.is_empty() {
+ Some(input.parse()?)
+ } else {
+ input.parse()?
+ }
+ },
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Index {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let lit: LitInt = input.parse()?;
+ if lit.suffix().is_empty() {
+ Ok(Index {
+ index: lit
+ .base10_digits()
+ .parse()
+ .map_err(|err| Error::new(lit.span(), err))?,
+ span: lit.span(),
+ })
+ } else {
+ Err(Error::new(lit.span(), "expected unsuffixed integer"))
+ }
+ }
+ }
+
+ fn multi_index(e: &mut Expr, dot_token: &mut Token![.], float: LitFloat) -> Result<bool> {
+ let mut float_repr = float.to_string();
+ let trailing_dot = float_repr.ends_with('.');
+ if trailing_dot {
+ float_repr.truncate(float_repr.len() - 1);
+ }
+ for part in float_repr.split('.') {
+ let index = crate::parse_str(part).map_err(|err| Error::new(float.span(), err))?;
+ #[cfg(not(syn_no_const_vec_new))]
+ let base = mem::replace(e, Expr::DUMMY);
+ #[cfg(syn_no_const_vec_new)]
+ let base = mem::replace(e, Expr::Verbatim(TokenStream::new()));
+ *e = Expr::Field(ExprField {
+ attrs: Vec::new(),
+ base: Box::new(base),
+ dot_token: Token![.](dot_token.span),
+ member: Member::Unnamed(index),
+ });
+ *dot_token = Token![.](float.span());
+ }
+ Ok(!trailing_dot)
+ }
+
+ #[cfg(feature = "full")]
+ impl Member {
+ fn is_named(&self) -> bool {
+ match *self {
+ Member::Named(_) => true,
+ Member::Unnamed(_) => false,
+ }
+ }
+ }
+
+ fn check_cast(input: ParseStream) -> Result<()> {
+ let kind = if input.peek(Token![.]) && !input.peek(Token![..]) {
+ if input.peek2(token::Await) {
+ "`.await`"
+ } else if input.peek2(Ident) && (input.peek3(token::Paren) || input.peek3(Token![::])) {
+ "a method call"
+ } else {
+ "a field access"
+ }
+ } else if input.peek(Token![?]) {
+ "`?`"
+ } else if input.peek(token::Bracket) {
+ "indexing"
+ } else if input.peek(token::Paren) {
+ "a function call"
+ } else {
+ return Ok(());
+ };
+ let msg = format!("casts cannot be followed by {}", kind);
+ Err(input.error(msg))
+ }
+}
+
+#[cfg(feature = "printing")]
+pub(crate) mod printing {
+ use super::*;
+ #[cfg(feature = "full")]
+ use crate::attr::FilterAttrs;
+ use proc_macro2::{Literal, TokenStream};
+ use quote::{ToTokens, TokenStreamExt};
+
+ // If the given expression is a bare `ExprStruct`, wraps it in parenthesis
+ // before appending it to `TokenStream`.
+ #[cfg(feature = "full")]
+ fn wrap_bare_struct(tokens: &mut TokenStream, e: &Expr) {
+ if let Expr::Struct(_) = *e {
+ token::Paren::default().surround(tokens, |tokens| {
+ e.to_tokens(tokens);
+ });
+ } else {
+ e.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ pub(crate) fn outer_attrs_to_tokens(attrs: &[Attribute], tokens: &mut TokenStream) {
+ tokens.append_all(attrs.outer());
+ }
+
+ #[cfg(feature = "full")]
+ fn inner_attrs_to_tokens(attrs: &[Attribute], tokens: &mut TokenStream) {
+ tokens.append_all(attrs.inner());
+ }
+
+ #[cfg(not(feature = "full"))]
+ pub(crate) fn outer_attrs_to_tokens(_attrs: &[Attribute], _tokens: &mut TokenStream) {}
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprBox {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.box_token.to_tokens(tokens);
+ self.expr.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprArray {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.bracket_token.surround(tokens, |tokens| {
+ self.elems.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprCall {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.func.to_tokens(tokens);
+ self.paren_token.surround(tokens, |tokens| {
+ self.args.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprMethodCall {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.receiver.to_tokens(tokens);
+ self.dot_token.to_tokens(tokens);
+ self.method.to_tokens(tokens);
+ self.turbofish.to_tokens(tokens);
+ self.paren_token.surround(tokens, |tokens| {
+ self.args.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for MethodTurbofish {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.colon2_token.to_tokens(tokens);
+ self.lt_token.to_tokens(tokens);
+ self.args.to_tokens(tokens);
+ self.gt_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for GenericMethodArgument {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ GenericMethodArgument::Type(t) => t.to_tokens(tokens),
+ GenericMethodArgument::Const(c) => c.to_tokens(tokens),
+ }
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprTuple {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.paren_token.surround(tokens, |tokens| {
+ self.elems.to_tokens(tokens);
+ // If we only have one argument, we need a trailing comma to
+ // distinguish ExprTuple from ExprParen.
+ if self.elems.len() == 1 && !self.elems.trailing_punct() {
+ <Token![,]>::default().to_tokens(tokens);
+ }
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprBinary {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.left.to_tokens(tokens);
+ self.op.to_tokens(tokens);
+ self.right.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprUnary {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.op.to_tokens(tokens);
+ self.expr.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprLit {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.lit.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprCast {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.expr.to_tokens(tokens);
+ self.as_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprType {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.expr.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn maybe_wrap_else(tokens: &mut TokenStream, else_: &Option<(Token![else], Box<Expr>)>) {
+ if let Some((else_token, else_)) = else_ {
+ else_token.to_tokens(tokens);
+
+ // If we are not one of the valid expressions to exist in an else
+ // clause, wrap ourselves in a block.
+ match **else_ {
+ Expr::If(_) | Expr::Block(_) => {
+ else_.to_tokens(tokens);
+ }
+ _ => {
+ token::Brace::default().surround(tokens, |tokens| {
+ else_.to_tokens(tokens);
+ });
+ }
+ }
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprLet {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.let_token.to_tokens(tokens);
+ self.pat.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ wrap_bare_struct(tokens, &self.expr);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprIf {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.if_token.to_tokens(tokens);
+ wrap_bare_struct(tokens, &self.cond);
+ self.then_branch.to_tokens(tokens);
+ maybe_wrap_else(tokens, &self.else_branch);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprWhile {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.label.to_tokens(tokens);
+ self.while_token.to_tokens(tokens);
+ wrap_bare_struct(tokens, &self.cond);
+ self.body.brace_token.surround(tokens, |tokens| {
+ inner_attrs_to_tokens(&self.attrs, tokens);
+ tokens.append_all(&self.body.stmts);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprForLoop {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.label.to_tokens(tokens);
+ self.for_token.to_tokens(tokens);
+ self.pat.to_tokens(tokens);
+ self.in_token.to_tokens(tokens);
+ wrap_bare_struct(tokens, &self.expr);
+ self.body.brace_token.surround(tokens, |tokens| {
+ inner_attrs_to_tokens(&self.attrs, tokens);
+ tokens.append_all(&self.body.stmts);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprLoop {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.label.to_tokens(tokens);
+ self.loop_token.to_tokens(tokens);
+ self.body.brace_token.surround(tokens, |tokens| {
+ inner_attrs_to_tokens(&self.attrs, tokens);
+ tokens.append_all(&self.body.stmts);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprMatch {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.match_token.to_tokens(tokens);
+ wrap_bare_struct(tokens, &self.expr);
+ self.brace_token.surround(tokens, |tokens| {
+ inner_attrs_to_tokens(&self.attrs, tokens);
+ for (i, arm) in self.arms.iter().enumerate() {
+ arm.to_tokens(tokens);
+ // Ensure that we have a comma after a non-block arm, except
+ // for the last one.
+ let is_last = i == self.arms.len() - 1;
+ if !is_last && requires_terminator(&arm.body) && arm.comma.is_none() {
+ <Token![,]>::default().to_tokens(tokens);
+ }
+ }
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprAsync {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.async_token.to_tokens(tokens);
+ self.capture.to_tokens(tokens);
+ self.block.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprAwait {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.base.to_tokens(tokens);
+ self.dot_token.to_tokens(tokens);
+ self.await_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprTryBlock {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.try_token.to_tokens(tokens);
+ self.block.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprYield {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.yield_token.to_tokens(tokens);
+ self.expr.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprClosure {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.movability.to_tokens(tokens);
+ self.asyncness.to_tokens(tokens);
+ self.capture.to_tokens(tokens);
+ self.or1_token.to_tokens(tokens);
+ self.inputs.to_tokens(tokens);
+ self.or2_token.to_tokens(tokens);
+ self.output.to_tokens(tokens);
+ self.body.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprUnsafe {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.unsafe_token.to_tokens(tokens);
+ self.block.brace_token.surround(tokens, |tokens| {
+ inner_attrs_to_tokens(&self.attrs, tokens);
+ tokens.append_all(&self.block.stmts);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprBlock {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.label.to_tokens(tokens);
+ self.block.brace_token.surround(tokens, |tokens| {
+ inner_attrs_to_tokens(&self.attrs, tokens);
+ tokens.append_all(&self.block.stmts);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprAssign {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.left.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ self.right.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprAssignOp {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.left.to_tokens(tokens);
+ self.op.to_tokens(tokens);
+ self.right.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprField {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.base.to_tokens(tokens);
+ self.dot_token.to_tokens(tokens);
+ self.member.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Member {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ Member::Named(ident) => ident.to_tokens(tokens),
+ Member::Unnamed(index) => index.to_tokens(tokens),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Index {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ let mut lit = Literal::i64_unsuffixed(i64::from(self.index));
+ lit.set_span(self.span);
+ tokens.append(lit);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprIndex {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.expr.to_tokens(tokens);
+ self.bracket_token.surround(tokens, |tokens| {
+ self.index.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for RangeLimits {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ RangeLimits::HalfOpen(t) => t.to_tokens(tokens),
+ RangeLimits::Closed(t) => t.to_tokens(tokens),
+ }
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprRange {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.from.to_tokens(tokens);
+ self.limits.to_tokens(tokens);
+ self.to.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprPath {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ path::printing::print_path(tokens, &self.qself, &self.path);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprReference {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.and_token.to_tokens(tokens);
+ self.mutability.to_tokens(tokens);
+ self.expr.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprBreak {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.break_token.to_tokens(tokens);
+ self.label.to_tokens(tokens);
+ self.expr.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprContinue {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.continue_token.to_tokens(tokens);
+ self.label.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprReturn {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.return_token.to_tokens(tokens);
+ self.expr.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprMacro {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.mac.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprStruct {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.path.to_tokens(tokens);
+ self.brace_token.surround(tokens, |tokens| {
+ self.fields.to_tokens(tokens);
+ if let Some(dot2_token) = &self.dot2_token {
+ dot2_token.to_tokens(tokens);
+ } else if self.rest.is_some() {
+ Token![..](Span::call_site()).to_tokens(tokens);
+ }
+ self.rest.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprRepeat {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.bracket_token.surround(tokens, |tokens| {
+ self.expr.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ self.len.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprGroup {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.group_token.surround(tokens, |tokens| {
+ self.expr.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprParen {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.paren_token.surround(tokens, |tokens| {
+ self.expr.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ExprTry {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.expr.to_tokens(tokens);
+ self.question_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Label {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.name.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for FieldValue {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ outer_attrs_to_tokens(&self.attrs, tokens);
+ self.member.to_tokens(tokens);
+ if let Some(colon_token) = &self.colon_token {
+ colon_token.to_tokens(tokens);
+ self.expr.to_tokens(tokens);
+ }
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Arm {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(&self.attrs);
+ self.pat.to_tokens(tokens);
+ if let Some((if_token, guard)) = &self.guard {
+ if_token.to_tokens(tokens);
+ guard.to_tokens(tokens);
+ }
+ self.fat_arrow_token.to_tokens(tokens);
+ self.body.to_tokens(tokens);
+ self.comma.to_tokens(tokens);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/ext.rs b/third_party/rust/syn/src/ext.rs
new file mode 100644
index 0000000000..98d5550f48
--- /dev/null
+++ b/third_party/rust/syn/src/ext.rs
@@ -0,0 +1,139 @@
+//! Extension traits to provide parsing methods on foreign types.
+//!
+//! *This module is available only if Syn is built with the `"parsing"` feature.*
+
+use crate::buffer::Cursor;
+use crate::parse::Peek;
+use crate::parse::{ParseStream, Result};
+use crate::sealed::lookahead;
+use crate::token::CustomToken;
+use proc_macro2::Ident;
+
+/// Additional methods for `Ident` not provided by proc-macro2 or libproc_macro.
+///
+/// This trait is sealed and cannot be implemented for types outside of Syn. It
+/// is implemented only for `proc_macro2::Ident`.
+///
+/// *This trait is available only if Syn is built with the `"parsing"` feature.*
+pub trait IdentExt: Sized + private::Sealed {
+ /// Parses any identifier including keywords.
+ ///
+ /// This is useful when parsing macro input which allows Rust keywords as
+ /// identifiers.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use syn::{Error, Ident, Result, Token};
+ /// use syn::ext::IdentExt;
+ /// use syn::parse::ParseStream;
+ ///
+ /// mod kw {
+ /// syn::custom_keyword!(name);
+ /// }
+ ///
+ /// // Parses input that looks like `name = NAME` where `NAME` can be
+ /// // any identifier.
+ /// //
+ /// // Examples:
+ /// //
+ /// // name = anything
+ /// // name = impl
+ /// fn parse_dsl(input: ParseStream) -> Result<Ident> {
+ /// input.parse::<kw::name>()?;
+ /// input.parse::<Token![=]>()?;
+ /// let name = input.call(Ident::parse_any)?;
+ /// Ok(name)
+ /// }
+ /// ```
+ fn parse_any(input: ParseStream) -> Result<Self>;
+
+ /// Peeks any identifier including keywords. Usage:
+ /// `input.peek(Ident::peek_any)`
+ ///
+ /// This is different from `input.peek(Ident)` which only returns true in
+ /// the case of an ident which is not a Rust keyword.
+ #[allow(non_upper_case_globals)]
+ const peek_any: private::PeekFn = private::PeekFn;
+
+ /// Strips the raw marker `r#`, if any, from the beginning of an ident.
+ ///
+ /// - unraw(`x`) = `x`
+ /// - unraw(`move`) = `move`
+ /// - unraw(`r#move`) = `move`
+ ///
+ /// # Example
+ ///
+ /// In the case of interop with other languages like Python that have a
+ /// different set of keywords than Rust, we might come across macro input
+ /// that involves raw identifiers to refer to ordinary variables in the
+ /// other language with a name that happens to be a Rust keyword.
+ ///
+ /// The function below appends an identifier from the caller's input onto a
+ /// fixed prefix. Without using `unraw()`, this would tend to produce
+ /// invalid identifiers like `__pyo3_get_r#move`.
+ ///
+ /// ```
+ /// use proc_macro2::Span;
+ /// use syn::Ident;
+ /// use syn::ext::IdentExt;
+ ///
+ /// fn ident_for_getter(variable: &Ident) -> Ident {
+ /// let getter = format!("__pyo3_get_{}", variable.unraw());
+ /// Ident::new(&getter, Span::call_site())
+ /// }
+ /// ```
+ fn unraw(&self) -> Ident;
+}
+
+impl IdentExt for Ident {
+ fn parse_any(input: ParseStream) -> Result<Self> {
+ input.step(|cursor| match cursor.ident() {
+ Some((ident, rest)) => Ok((ident, rest)),
+ None => Err(cursor.error("expected ident")),
+ })
+ }
+
+ fn unraw(&self) -> Ident {
+ let string = self.to_string();
+ if string.starts_with("r#") {
+ Ident::new(&string[2..], self.span())
+ } else {
+ self.clone()
+ }
+ }
+}
+
+impl Peek for private::PeekFn {
+ type Token = private::IdentAny;
+}
+
+impl CustomToken for private::IdentAny {
+ fn peek(cursor: Cursor) -> bool {
+ cursor.ident().is_some()
+ }
+
+ fn display() -> &'static str {
+ "identifier"
+ }
+}
+
+impl lookahead::Sealed for private::PeekFn {}
+
+mod private {
+ use proc_macro2::Ident;
+
+ pub trait Sealed {}
+
+ impl Sealed for Ident {}
+
+ pub struct PeekFn;
+ pub struct IdentAny;
+
+ impl Copy for PeekFn {}
+ impl Clone for PeekFn {
+ fn clone(&self) -> Self {
+ *self
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/file.rs b/third_party/rust/syn/src/file.rs
new file mode 100644
index 0000000000..280484f980
--- /dev/null
+++ b/third_party/rust/syn/src/file.rs
@@ -0,0 +1,125 @@
+use super::*;
+
+ast_struct! {
+ /// A complete file of Rust source code.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ ///
+ /// # Example
+ ///
+ /// Parse a Rust source file into a `syn::File` and print out a debug
+ /// representation of the syntax tree.
+ ///
+ /// ```
+ /// use std::env;
+ /// use std::fs::File;
+ /// use std::io::Read;
+ /// use std::process;
+ ///
+ /// fn main() {
+ /// # }
+ /// #
+ /// # fn fake_main() {
+ /// let mut args = env::args();
+ /// let _ = args.next(); // executable name
+ ///
+ /// let filename = match (args.next(), args.next()) {
+ /// (Some(filename), None) => filename,
+ /// _ => {
+ /// eprintln!("Usage: dump-syntax path/to/filename.rs");
+ /// process::exit(1);
+ /// }
+ /// };
+ ///
+ /// let mut file = File::open(&filename).expect("Unable to open file");
+ ///
+ /// let mut src = String::new();
+ /// file.read_to_string(&mut src).expect("Unable to read file");
+ ///
+ /// let syntax = syn::parse_file(&src).expect("Unable to parse file");
+ ///
+ /// // Debug impl is available if Syn is built with "extra-traits" feature.
+ /// println!("{:#?}", syntax);
+ /// }
+ /// ```
+ ///
+ /// Running with its own source code as input, this program prints output
+ /// that begins with:
+ ///
+ /// ```text
+ /// File {
+ /// shebang: None,
+ /// attrs: [],
+ /// items: [
+ /// Use(
+ /// ItemUse {
+ /// attrs: [],
+ /// vis: Inherited,
+ /// use_token: Use,
+ /// leading_colon: None,
+ /// tree: Path(
+ /// UsePath {
+ /// ident: Ident(
+ /// std,
+ /// ),
+ /// colon2_token: Colon2,
+ /// tree: Name(
+ /// UseName {
+ /// ident: Ident(
+ /// env,
+ /// ),
+ /// },
+ /// ),
+ /// },
+ /// ),
+ /// semi_token: Semi,
+ /// },
+ /// ),
+ /// ...
+ /// ```
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct File {
+ pub shebang: Option<String>,
+ pub attrs: Vec<Attribute>,
+ pub items: Vec<Item>,
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::parse::{Parse, ParseStream, Result};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for File {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(File {
+ shebang: None,
+ attrs: input.call(Attribute::parse_inner)?,
+ items: {
+ let mut items = Vec::new();
+ while !input.is_empty() {
+ items.push(input.parse()?);
+ }
+ items
+ },
+ })
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use crate::attr::FilterAttrs;
+ use proc_macro2::TokenStream;
+ use quote::{ToTokens, TokenStreamExt};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for File {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.inner());
+ tokens.append_all(&self.items);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/gen/clone.rs b/third_party/rust/syn/src/gen/clone.rs
new file mode 100644
index 0000000000..a413e3ec70
--- /dev/null
+++ b/third_party/rust/syn/src/gen/clone.rs
@@ -0,0 +1,2241 @@
+// This file is @generated by syn-internal-codegen.
+// It is not intended for manual editing.
+
+#![allow(clippy::clone_on_copy, clippy::expl_impl_clone_on_copy)]
+use crate::*;
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Abi {
+ fn clone(&self) -> Self {
+ Abi {
+ extern_token: self.extern_token.clone(),
+ name: self.name.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for AngleBracketedGenericArguments {
+ fn clone(&self) -> Self {
+ AngleBracketedGenericArguments {
+ colon2_token: self.colon2_token.clone(),
+ lt_token: self.lt_token.clone(),
+ args: self.args.clone(),
+ gt_token: self.gt_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Arm {
+ fn clone(&self) -> Self {
+ Arm {
+ attrs: self.attrs.clone(),
+ pat: self.pat.clone(),
+ guard: self.guard.clone(),
+ fat_arrow_token: self.fat_arrow_token.clone(),
+ body: self.body.clone(),
+ comma: self.comma.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Copy for AttrStyle {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for AttrStyle {
+ fn clone(&self) -> Self {
+ *self
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Attribute {
+ fn clone(&self) -> Self {
+ Attribute {
+ pound_token: self.pound_token.clone(),
+ style: self.style.clone(),
+ bracket_token: self.bracket_token.clone(),
+ path: self.path.clone(),
+ tokens: self.tokens.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for BareFnArg {
+ fn clone(&self) -> Self {
+ BareFnArg {
+ attrs: self.attrs.clone(),
+ name: self.name.clone(),
+ ty: self.ty.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Copy for BinOp {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for BinOp {
+ fn clone(&self) -> Self {
+ *self
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Binding {
+ fn clone(&self) -> Self {
+ Binding {
+ ident: self.ident.clone(),
+ eq_token: self.eq_token.clone(),
+ ty: self.ty.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Block {
+ fn clone(&self) -> Self {
+ Block {
+ brace_token: self.brace_token.clone(),
+ stmts: self.stmts.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for BoundLifetimes {
+ fn clone(&self) -> Self {
+ BoundLifetimes {
+ for_token: self.for_token.clone(),
+ lt_token: self.lt_token.clone(),
+ lifetimes: self.lifetimes.clone(),
+ gt_token: self.gt_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ConstParam {
+ fn clone(&self) -> Self {
+ ConstParam {
+ attrs: self.attrs.clone(),
+ const_token: self.const_token.clone(),
+ ident: self.ident.clone(),
+ colon_token: self.colon_token.clone(),
+ ty: self.ty.clone(),
+ eq_token: self.eq_token.clone(),
+ default: self.default.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Constraint {
+ fn clone(&self) -> Self {
+ Constraint {
+ ident: self.ident.clone(),
+ colon_token: self.colon_token.clone(),
+ bounds: self.bounds.clone(),
+ }
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Data {
+ fn clone(&self) -> Self {
+ match self {
+ Data::Struct(v0) => Data::Struct(v0.clone()),
+ Data::Enum(v0) => Data::Enum(v0.clone()),
+ Data::Union(v0) => Data::Union(v0.clone()),
+ }
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for DataEnum {
+ fn clone(&self) -> Self {
+ DataEnum {
+ enum_token: self.enum_token.clone(),
+ brace_token: self.brace_token.clone(),
+ variants: self.variants.clone(),
+ }
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for DataStruct {
+ fn clone(&self) -> Self {
+ DataStruct {
+ struct_token: self.struct_token.clone(),
+ fields: self.fields.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for DataUnion {
+ fn clone(&self) -> Self {
+ DataUnion {
+ union_token: self.union_token.clone(),
+ fields: self.fields.clone(),
+ }
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for DeriveInput {
+ fn clone(&self) -> Self {
+ DeriveInput {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ ident: self.ident.clone(),
+ generics: self.generics.clone(),
+ data: self.data.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Expr {
+ fn clone(&self) -> Self {
+ match self {
+ #[cfg(feature = "full")]
+ Expr::Array(v0) => Expr::Array(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Assign(v0) => Expr::Assign(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::AssignOp(v0) => Expr::AssignOp(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Async(v0) => Expr::Async(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Await(v0) => Expr::Await(v0.clone()),
+ Expr::Binary(v0) => Expr::Binary(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Block(v0) => Expr::Block(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Box(v0) => Expr::Box(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Break(v0) => Expr::Break(v0.clone()),
+ Expr::Call(v0) => Expr::Call(v0.clone()),
+ Expr::Cast(v0) => Expr::Cast(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Closure(v0) => Expr::Closure(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Continue(v0) => Expr::Continue(v0.clone()),
+ Expr::Field(v0) => Expr::Field(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::ForLoop(v0) => Expr::ForLoop(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Group(v0) => Expr::Group(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::If(v0) => Expr::If(v0.clone()),
+ Expr::Index(v0) => Expr::Index(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Let(v0) => Expr::Let(v0.clone()),
+ Expr::Lit(v0) => Expr::Lit(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Loop(v0) => Expr::Loop(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Macro(v0) => Expr::Macro(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Match(v0) => Expr::Match(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::MethodCall(v0) => Expr::MethodCall(v0.clone()),
+ Expr::Paren(v0) => Expr::Paren(v0.clone()),
+ Expr::Path(v0) => Expr::Path(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Range(v0) => Expr::Range(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Reference(v0) => Expr::Reference(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Repeat(v0) => Expr::Repeat(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Return(v0) => Expr::Return(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Struct(v0) => Expr::Struct(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Try(v0) => Expr::Try(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::TryBlock(v0) => Expr::TryBlock(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Tuple(v0) => Expr::Tuple(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Type(v0) => Expr::Type(v0.clone()),
+ Expr::Unary(v0) => Expr::Unary(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Unsafe(v0) => Expr::Unsafe(v0.clone()),
+ Expr::Verbatim(v0) => Expr::Verbatim(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::While(v0) => Expr::While(v0.clone()),
+ #[cfg(feature = "full")]
+ Expr::Yield(v0) => Expr::Yield(v0.clone()),
+ #[cfg(any(syn_no_non_exhaustive, not(feature = "full")))]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprArray {
+ fn clone(&self) -> Self {
+ ExprArray {
+ attrs: self.attrs.clone(),
+ bracket_token: self.bracket_token.clone(),
+ elems: self.elems.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprAssign {
+ fn clone(&self) -> Self {
+ ExprAssign {
+ attrs: self.attrs.clone(),
+ left: self.left.clone(),
+ eq_token: self.eq_token.clone(),
+ right: self.right.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprAssignOp {
+ fn clone(&self) -> Self {
+ ExprAssignOp {
+ attrs: self.attrs.clone(),
+ left: self.left.clone(),
+ op: self.op.clone(),
+ right: self.right.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprAsync {
+ fn clone(&self) -> Self {
+ ExprAsync {
+ attrs: self.attrs.clone(),
+ async_token: self.async_token.clone(),
+ capture: self.capture.clone(),
+ block: self.block.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprAwait {
+ fn clone(&self) -> Self {
+ ExprAwait {
+ attrs: self.attrs.clone(),
+ base: self.base.clone(),
+ dot_token: self.dot_token.clone(),
+ await_token: self.await_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprBinary {
+ fn clone(&self) -> Self {
+ ExprBinary {
+ attrs: self.attrs.clone(),
+ left: self.left.clone(),
+ op: self.op.clone(),
+ right: self.right.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprBlock {
+ fn clone(&self) -> Self {
+ ExprBlock {
+ attrs: self.attrs.clone(),
+ label: self.label.clone(),
+ block: self.block.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprBox {
+ fn clone(&self) -> Self {
+ ExprBox {
+ attrs: self.attrs.clone(),
+ box_token: self.box_token.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprBreak {
+ fn clone(&self) -> Self {
+ ExprBreak {
+ attrs: self.attrs.clone(),
+ break_token: self.break_token.clone(),
+ label: self.label.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprCall {
+ fn clone(&self) -> Self {
+ ExprCall {
+ attrs: self.attrs.clone(),
+ func: self.func.clone(),
+ paren_token: self.paren_token.clone(),
+ args: self.args.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprCast {
+ fn clone(&self) -> Self {
+ ExprCast {
+ attrs: self.attrs.clone(),
+ expr: self.expr.clone(),
+ as_token: self.as_token.clone(),
+ ty: self.ty.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprClosure {
+ fn clone(&self) -> Self {
+ ExprClosure {
+ attrs: self.attrs.clone(),
+ movability: self.movability.clone(),
+ asyncness: self.asyncness.clone(),
+ capture: self.capture.clone(),
+ or1_token: self.or1_token.clone(),
+ inputs: self.inputs.clone(),
+ or2_token: self.or2_token.clone(),
+ output: self.output.clone(),
+ body: self.body.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprContinue {
+ fn clone(&self) -> Self {
+ ExprContinue {
+ attrs: self.attrs.clone(),
+ continue_token: self.continue_token.clone(),
+ label: self.label.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprField {
+ fn clone(&self) -> Self {
+ ExprField {
+ attrs: self.attrs.clone(),
+ base: self.base.clone(),
+ dot_token: self.dot_token.clone(),
+ member: self.member.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprForLoop {
+ fn clone(&self) -> Self {
+ ExprForLoop {
+ attrs: self.attrs.clone(),
+ label: self.label.clone(),
+ for_token: self.for_token.clone(),
+ pat: self.pat.clone(),
+ in_token: self.in_token.clone(),
+ expr: self.expr.clone(),
+ body: self.body.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprGroup {
+ fn clone(&self) -> Self {
+ ExprGroup {
+ attrs: self.attrs.clone(),
+ group_token: self.group_token.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprIf {
+ fn clone(&self) -> Self {
+ ExprIf {
+ attrs: self.attrs.clone(),
+ if_token: self.if_token.clone(),
+ cond: self.cond.clone(),
+ then_branch: self.then_branch.clone(),
+ else_branch: self.else_branch.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprIndex {
+ fn clone(&self) -> Self {
+ ExprIndex {
+ attrs: self.attrs.clone(),
+ expr: self.expr.clone(),
+ bracket_token: self.bracket_token.clone(),
+ index: self.index.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprLet {
+ fn clone(&self) -> Self {
+ ExprLet {
+ attrs: self.attrs.clone(),
+ let_token: self.let_token.clone(),
+ pat: self.pat.clone(),
+ eq_token: self.eq_token.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprLit {
+ fn clone(&self) -> Self {
+ ExprLit {
+ attrs: self.attrs.clone(),
+ lit: self.lit.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprLoop {
+ fn clone(&self) -> Self {
+ ExprLoop {
+ attrs: self.attrs.clone(),
+ label: self.label.clone(),
+ loop_token: self.loop_token.clone(),
+ body: self.body.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprMacro {
+ fn clone(&self) -> Self {
+ ExprMacro {
+ attrs: self.attrs.clone(),
+ mac: self.mac.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprMatch {
+ fn clone(&self) -> Self {
+ ExprMatch {
+ attrs: self.attrs.clone(),
+ match_token: self.match_token.clone(),
+ expr: self.expr.clone(),
+ brace_token: self.brace_token.clone(),
+ arms: self.arms.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprMethodCall {
+ fn clone(&self) -> Self {
+ ExprMethodCall {
+ attrs: self.attrs.clone(),
+ receiver: self.receiver.clone(),
+ dot_token: self.dot_token.clone(),
+ method: self.method.clone(),
+ turbofish: self.turbofish.clone(),
+ paren_token: self.paren_token.clone(),
+ args: self.args.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprParen {
+ fn clone(&self) -> Self {
+ ExprParen {
+ attrs: self.attrs.clone(),
+ paren_token: self.paren_token.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprPath {
+ fn clone(&self) -> Self {
+ ExprPath {
+ attrs: self.attrs.clone(),
+ qself: self.qself.clone(),
+ path: self.path.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprRange {
+ fn clone(&self) -> Self {
+ ExprRange {
+ attrs: self.attrs.clone(),
+ from: self.from.clone(),
+ limits: self.limits.clone(),
+ to: self.to.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprReference {
+ fn clone(&self) -> Self {
+ ExprReference {
+ attrs: self.attrs.clone(),
+ and_token: self.and_token.clone(),
+ raw: self.raw.clone(),
+ mutability: self.mutability.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprRepeat {
+ fn clone(&self) -> Self {
+ ExprRepeat {
+ attrs: self.attrs.clone(),
+ bracket_token: self.bracket_token.clone(),
+ expr: self.expr.clone(),
+ semi_token: self.semi_token.clone(),
+ len: self.len.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprReturn {
+ fn clone(&self) -> Self {
+ ExprReturn {
+ attrs: self.attrs.clone(),
+ return_token: self.return_token.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprStruct {
+ fn clone(&self) -> Self {
+ ExprStruct {
+ attrs: self.attrs.clone(),
+ path: self.path.clone(),
+ brace_token: self.brace_token.clone(),
+ fields: self.fields.clone(),
+ dot2_token: self.dot2_token.clone(),
+ rest: self.rest.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprTry {
+ fn clone(&self) -> Self {
+ ExprTry {
+ attrs: self.attrs.clone(),
+ expr: self.expr.clone(),
+ question_token: self.question_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprTryBlock {
+ fn clone(&self) -> Self {
+ ExprTryBlock {
+ attrs: self.attrs.clone(),
+ try_token: self.try_token.clone(),
+ block: self.block.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprTuple {
+ fn clone(&self) -> Self {
+ ExprTuple {
+ attrs: self.attrs.clone(),
+ paren_token: self.paren_token.clone(),
+ elems: self.elems.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprType {
+ fn clone(&self) -> Self {
+ ExprType {
+ attrs: self.attrs.clone(),
+ expr: self.expr.clone(),
+ colon_token: self.colon_token.clone(),
+ ty: self.ty.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprUnary {
+ fn clone(&self) -> Self {
+ ExprUnary {
+ attrs: self.attrs.clone(),
+ op: self.op.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprUnsafe {
+ fn clone(&self) -> Self {
+ ExprUnsafe {
+ attrs: self.attrs.clone(),
+ unsafe_token: self.unsafe_token.clone(),
+ block: self.block.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprWhile {
+ fn clone(&self) -> Self {
+ ExprWhile {
+ attrs: self.attrs.clone(),
+ label: self.label.clone(),
+ while_token: self.while_token.clone(),
+ cond: self.cond.clone(),
+ body: self.body.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ExprYield {
+ fn clone(&self) -> Self {
+ ExprYield {
+ attrs: self.attrs.clone(),
+ yield_token: self.yield_token.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Field {
+ fn clone(&self) -> Self {
+ Field {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ ident: self.ident.clone(),
+ colon_token: self.colon_token.clone(),
+ ty: self.ty.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for FieldPat {
+ fn clone(&self) -> Self {
+ FieldPat {
+ attrs: self.attrs.clone(),
+ member: self.member.clone(),
+ colon_token: self.colon_token.clone(),
+ pat: self.pat.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for FieldValue {
+ fn clone(&self) -> Self {
+ FieldValue {
+ attrs: self.attrs.clone(),
+ member: self.member.clone(),
+ colon_token: self.colon_token.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Fields {
+ fn clone(&self) -> Self {
+ match self {
+ Fields::Named(v0) => Fields::Named(v0.clone()),
+ Fields::Unnamed(v0) => Fields::Unnamed(v0.clone()),
+ Fields::Unit => Fields::Unit,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for FieldsNamed {
+ fn clone(&self) -> Self {
+ FieldsNamed {
+ brace_token: self.brace_token.clone(),
+ named: self.named.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for FieldsUnnamed {
+ fn clone(&self) -> Self {
+ FieldsUnnamed {
+ paren_token: self.paren_token.clone(),
+ unnamed: self.unnamed.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for File {
+ fn clone(&self) -> Self {
+ File {
+ shebang: self.shebang.clone(),
+ attrs: self.attrs.clone(),
+ items: self.items.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for FnArg {
+ fn clone(&self) -> Self {
+ match self {
+ FnArg::Receiver(v0) => FnArg::Receiver(v0.clone()),
+ FnArg::Typed(v0) => FnArg::Typed(v0.clone()),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ForeignItem {
+ fn clone(&self) -> Self {
+ match self {
+ ForeignItem::Fn(v0) => ForeignItem::Fn(v0.clone()),
+ ForeignItem::Static(v0) => ForeignItem::Static(v0.clone()),
+ ForeignItem::Type(v0) => ForeignItem::Type(v0.clone()),
+ ForeignItem::Macro(v0) => ForeignItem::Macro(v0.clone()),
+ ForeignItem::Verbatim(v0) => ForeignItem::Verbatim(v0.clone()),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ForeignItemFn {
+ fn clone(&self) -> Self {
+ ForeignItemFn {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ sig: self.sig.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ForeignItemMacro {
+ fn clone(&self) -> Self {
+ ForeignItemMacro {
+ attrs: self.attrs.clone(),
+ mac: self.mac.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ForeignItemStatic {
+ fn clone(&self) -> Self {
+ ForeignItemStatic {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ static_token: self.static_token.clone(),
+ mutability: self.mutability.clone(),
+ ident: self.ident.clone(),
+ colon_token: self.colon_token.clone(),
+ ty: self.ty.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ForeignItemType {
+ fn clone(&self) -> Self {
+ ForeignItemType {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ type_token: self.type_token.clone(),
+ ident: self.ident.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for GenericArgument {
+ fn clone(&self) -> Self {
+ match self {
+ GenericArgument::Lifetime(v0) => GenericArgument::Lifetime(v0.clone()),
+ GenericArgument::Type(v0) => GenericArgument::Type(v0.clone()),
+ GenericArgument::Const(v0) => GenericArgument::Const(v0.clone()),
+ GenericArgument::Binding(v0) => GenericArgument::Binding(v0.clone()),
+ GenericArgument::Constraint(v0) => GenericArgument::Constraint(v0.clone()),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for GenericMethodArgument {
+ fn clone(&self) -> Self {
+ match self {
+ GenericMethodArgument::Type(v0) => GenericMethodArgument::Type(v0.clone()),
+ GenericMethodArgument::Const(v0) => GenericMethodArgument::Const(v0.clone()),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for GenericParam {
+ fn clone(&self) -> Self {
+ match self {
+ GenericParam::Type(v0) => GenericParam::Type(v0.clone()),
+ GenericParam::Lifetime(v0) => GenericParam::Lifetime(v0.clone()),
+ GenericParam::Const(v0) => GenericParam::Const(v0.clone()),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Generics {
+ fn clone(&self) -> Self {
+ Generics {
+ lt_token: self.lt_token.clone(),
+ params: self.params.clone(),
+ gt_token: self.gt_token.clone(),
+ where_clause: self.where_clause.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ImplItem {
+ fn clone(&self) -> Self {
+ match self {
+ ImplItem::Const(v0) => ImplItem::Const(v0.clone()),
+ ImplItem::Method(v0) => ImplItem::Method(v0.clone()),
+ ImplItem::Type(v0) => ImplItem::Type(v0.clone()),
+ ImplItem::Macro(v0) => ImplItem::Macro(v0.clone()),
+ ImplItem::Verbatim(v0) => ImplItem::Verbatim(v0.clone()),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ImplItemConst {
+ fn clone(&self) -> Self {
+ ImplItemConst {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ defaultness: self.defaultness.clone(),
+ const_token: self.const_token.clone(),
+ ident: self.ident.clone(),
+ colon_token: self.colon_token.clone(),
+ ty: self.ty.clone(),
+ eq_token: self.eq_token.clone(),
+ expr: self.expr.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ImplItemMacro {
+ fn clone(&self) -> Self {
+ ImplItemMacro {
+ attrs: self.attrs.clone(),
+ mac: self.mac.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ImplItemMethod {
+ fn clone(&self) -> Self {
+ ImplItemMethod {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ defaultness: self.defaultness.clone(),
+ sig: self.sig.clone(),
+ block: self.block.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ImplItemType {
+ fn clone(&self) -> Self {
+ ImplItemType {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ defaultness: self.defaultness.clone(),
+ type_token: self.type_token.clone(),
+ ident: self.ident.clone(),
+ generics: self.generics.clone(),
+ eq_token: self.eq_token.clone(),
+ ty: self.ty.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Index {
+ fn clone(&self) -> Self {
+ Index {
+ index: self.index.clone(),
+ span: self.span.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Item {
+ fn clone(&self) -> Self {
+ match self {
+ Item::Const(v0) => Item::Const(v0.clone()),
+ Item::Enum(v0) => Item::Enum(v0.clone()),
+ Item::ExternCrate(v0) => Item::ExternCrate(v0.clone()),
+ Item::Fn(v0) => Item::Fn(v0.clone()),
+ Item::ForeignMod(v0) => Item::ForeignMod(v0.clone()),
+ Item::Impl(v0) => Item::Impl(v0.clone()),
+ Item::Macro(v0) => Item::Macro(v0.clone()),
+ Item::Macro2(v0) => Item::Macro2(v0.clone()),
+ Item::Mod(v0) => Item::Mod(v0.clone()),
+ Item::Static(v0) => Item::Static(v0.clone()),
+ Item::Struct(v0) => Item::Struct(v0.clone()),
+ Item::Trait(v0) => Item::Trait(v0.clone()),
+ Item::TraitAlias(v0) => Item::TraitAlias(v0.clone()),
+ Item::Type(v0) => Item::Type(v0.clone()),
+ Item::Union(v0) => Item::Union(v0.clone()),
+ Item::Use(v0) => Item::Use(v0.clone()),
+ Item::Verbatim(v0) => Item::Verbatim(v0.clone()),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemConst {
+ fn clone(&self) -> Self {
+ ItemConst {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ const_token: self.const_token.clone(),
+ ident: self.ident.clone(),
+ colon_token: self.colon_token.clone(),
+ ty: self.ty.clone(),
+ eq_token: self.eq_token.clone(),
+ expr: self.expr.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemEnum {
+ fn clone(&self) -> Self {
+ ItemEnum {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ enum_token: self.enum_token.clone(),
+ ident: self.ident.clone(),
+ generics: self.generics.clone(),
+ brace_token: self.brace_token.clone(),
+ variants: self.variants.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemExternCrate {
+ fn clone(&self) -> Self {
+ ItemExternCrate {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ extern_token: self.extern_token.clone(),
+ crate_token: self.crate_token.clone(),
+ ident: self.ident.clone(),
+ rename: self.rename.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemFn {
+ fn clone(&self) -> Self {
+ ItemFn {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ sig: self.sig.clone(),
+ block: self.block.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemForeignMod {
+ fn clone(&self) -> Self {
+ ItemForeignMod {
+ attrs: self.attrs.clone(),
+ abi: self.abi.clone(),
+ brace_token: self.brace_token.clone(),
+ items: self.items.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemImpl {
+ fn clone(&self) -> Self {
+ ItemImpl {
+ attrs: self.attrs.clone(),
+ defaultness: self.defaultness.clone(),
+ unsafety: self.unsafety.clone(),
+ impl_token: self.impl_token.clone(),
+ generics: self.generics.clone(),
+ trait_: self.trait_.clone(),
+ self_ty: self.self_ty.clone(),
+ brace_token: self.brace_token.clone(),
+ items: self.items.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemMacro {
+ fn clone(&self) -> Self {
+ ItemMacro {
+ attrs: self.attrs.clone(),
+ ident: self.ident.clone(),
+ mac: self.mac.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemMacro2 {
+ fn clone(&self) -> Self {
+ ItemMacro2 {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ macro_token: self.macro_token.clone(),
+ ident: self.ident.clone(),
+ rules: self.rules.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemMod {
+ fn clone(&self) -> Self {
+ ItemMod {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ mod_token: self.mod_token.clone(),
+ ident: self.ident.clone(),
+ content: self.content.clone(),
+ semi: self.semi.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemStatic {
+ fn clone(&self) -> Self {
+ ItemStatic {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ static_token: self.static_token.clone(),
+ mutability: self.mutability.clone(),
+ ident: self.ident.clone(),
+ colon_token: self.colon_token.clone(),
+ ty: self.ty.clone(),
+ eq_token: self.eq_token.clone(),
+ expr: self.expr.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemStruct {
+ fn clone(&self) -> Self {
+ ItemStruct {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ struct_token: self.struct_token.clone(),
+ ident: self.ident.clone(),
+ generics: self.generics.clone(),
+ fields: self.fields.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemTrait {
+ fn clone(&self) -> Self {
+ ItemTrait {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ unsafety: self.unsafety.clone(),
+ auto_token: self.auto_token.clone(),
+ trait_token: self.trait_token.clone(),
+ ident: self.ident.clone(),
+ generics: self.generics.clone(),
+ colon_token: self.colon_token.clone(),
+ supertraits: self.supertraits.clone(),
+ brace_token: self.brace_token.clone(),
+ items: self.items.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemTraitAlias {
+ fn clone(&self) -> Self {
+ ItemTraitAlias {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ trait_token: self.trait_token.clone(),
+ ident: self.ident.clone(),
+ generics: self.generics.clone(),
+ eq_token: self.eq_token.clone(),
+ bounds: self.bounds.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemType {
+ fn clone(&self) -> Self {
+ ItemType {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ type_token: self.type_token.clone(),
+ ident: self.ident.clone(),
+ generics: self.generics.clone(),
+ eq_token: self.eq_token.clone(),
+ ty: self.ty.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemUnion {
+ fn clone(&self) -> Self {
+ ItemUnion {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ union_token: self.union_token.clone(),
+ ident: self.ident.clone(),
+ generics: self.generics.clone(),
+ fields: self.fields.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ItemUse {
+ fn clone(&self) -> Self {
+ ItemUse {
+ attrs: self.attrs.clone(),
+ vis: self.vis.clone(),
+ use_token: self.use_token.clone(),
+ leading_colon: self.leading_colon.clone(),
+ tree: self.tree.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Label {
+ fn clone(&self) -> Self {
+ Label {
+ name: self.name.clone(),
+ colon_token: self.colon_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for LifetimeDef {
+ fn clone(&self) -> Self {
+ LifetimeDef {
+ attrs: self.attrs.clone(),
+ lifetime: self.lifetime.clone(),
+ colon_token: self.colon_token.clone(),
+ bounds: self.bounds.clone(),
+ }
+ }
+}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Lit {
+ fn clone(&self) -> Self {
+ match self {
+ Lit::Str(v0) => Lit::Str(v0.clone()),
+ Lit::ByteStr(v0) => Lit::ByteStr(v0.clone()),
+ Lit::Byte(v0) => Lit::Byte(v0.clone()),
+ Lit::Char(v0) => Lit::Char(v0.clone()),
+ Lit::Int(v0) => Lit::Int(v0.clone()),
+ Lit::Float(v0) => Lit::Float(v0.clone()),
+ Lit::Bool(v0) => Lit::Bool(v0.clone()),
+ Lit::Verbatim(v0) => Lit::Verbatim(v0.clone()),
+ }
+ }
+}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for LitBool {
+ fn clone(&self) -> Self {
+ LitBool {
+ value: self.value.clone(),
+ span: self.span.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Local {
+ fn clone(&self) -> Self {
+ Local {
+ attrs: self.attrs.clone(),
+ let_token: self.let_token.clone(),
+ pat: self.pat.clone(),
+ init: self.init.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Macro {
+ fn clone(&self) -> Self {
+ Macro {
+ path: self.path.clone(),
+ bang_token: self.bang_token.clone(),
+ delimiter: self.delimiter.clone(),
+ tokens: self.tokens.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for MacroDelimiter {
+ fn clone(&self) -> Self {
+ match self {
+ MacroDelimiter::Paren(v0) => MacroDelimiter::Paren(v0.clone()),
+ MacroDelimiter::Brace(v0) => MacroDelimiter::Brace(v0.clone()),
+ MacroDelimiter::Bracket(v0) => MacroDelimiter::Bracket(v0.clone()),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Member {
+ fn clone(&self) -> Self {
+ match self {
+ Member::Named(v0) => Member::Named(v0.clone()),
+ Member::Unnamed(v0) => Member::Unnamed(v0.clone()),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Meta {
+ fn clone(&self) -> Self {
+ match self {
+ Meta::Path(v0) => Meta::Path(v0.clone()),
+ Meta::List(v0) => Meta::List(v0.clone()),
+ Meta::NameValue(v0) => Meta::NameValue(v0.clone()),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for MetaList {
+ fn clone(&self) -> Self {
+ MetaList {
+ path: self.path.clone(),
+ paren_token: self.paren_token.clone(),
+ nested: self.nested.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for MetaNameValue {
+ fn clone(&self) -> Self {
+ MetaNameValue {
+ path: self.path.clone(),
+ eq_token: self.eq_token.clone(),
+ lit: self.lit.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for MethodTurbofish {
+ fn clone(&self) -> Self {
+ MethodTurbofish {
+ colon2_token: self.colon2_token.clone(),
+ lt_token: self.lt_token.clone(),
+ args: self.args.clone(),
+ gt_token: self.gt_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for NestedMeta {
+ fn clone(&self) -> Self {
+ match self {
+ NestedMeta::Meta(v0) => NestedMeta::Meta(v0.clone()),
+ NestedMeta::Lit(v0) => NestedMeta::Lit(v0.clone()),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ParenthesizedGenericArguments {
+ fn clone(&self) -> Self {
+ ParenthesizedGenericArguments {
+ paren_token: self.paren_token.clone(),
+ inputs: self.inputs.clone(),
+ output: self.output.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Pat {
+ fn clone(&self) -> Self {
+ match self {
+ Pat::Box(v0) => Pat::Box(v0.clone()),
+ Pat::Ident(v0) => Pat::Ident(v0.clone()),
+ Pat::Lit(v0) => Pat::Lit(v0.clone()),
+ Pat::Macro(v0) => Pat::Macro(v0.clone()),
+ Pat::Or(v0) => Pat::Or(v0.clone()),
+ Pat::Path(v0) => Pat::Path(v0.clone()),
+ Pat::Range(v0) => Pat::Range(v0.clone()),
+ Pat::Reference(v0) => Pat::Reference(v0.clone()),
+ Pat::Rest(v0) => Pat::Rest(v0.clone()),
+ Pat::Slice(v0) => Pat::Slice(v0.clone()),
+ Pat::Struct(v0) => Pat::Struct(v0.clone()),
+ Pat::Tuple(v0) => Pat::Tuple(v0.clone()),
+ Pat::TupleStruct(v0) => Pat::TupleStruct(v0.clone()),
+ Pat::Type(v0) => Pat::Type(v0.clone()),
+ Pat::Verbatim(v0) => Pat::Verbatim(v0.clone()),
+ Pat::Wild(v0) => Pat::Wild(v0.clone()),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatBox {
+ fn clone(&self) -> Self {
+ PatBox {
+ attrs: self.attrs.clone(),
+ box_token: self.box_token.clone(),
+ pat: self.pat.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatIdent {
+ fn clone(&self) -> Self {
+ PatIdent {
+ attrs: self.attrs.clone(),
+ by_ref: self.by_ref.clone(),
+ mutability: self.mutability.clone(),
+ ident: self.ident.clone(),
+ subpat: self.subpat.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatLit {
+ fn clone(&self) -> Self {
+ PatLit {
+ attrs: self.attrs.clone(),
+ expr: self.expr.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatMacro {
+ fn clone(&self) -> Self {
+ PatMacro {
+ attrs: self.attrs.clone(),
+ mac: self.mac.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatOr {
+ fn clone(&self) -> Self {
+ PatOr {
+ attrs: self.attrs.clone(),
+ leading_vert: self.leading_vert.clone(),
+ cases: self.cases.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatPath {
+ fn clone(&self) -> Self {
+ PatPath {
+ attrs: self.attrs.clone(),
+ qself: self.qself.clone(),
+ path: self.path.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatRange {
+ fn clone(&self) -> Self {
+ PatRange {
+ attrs: self.attrs.clone(),
+ lo: self.lo.clone(),
+ limits: self.limits.clone(),
+ hi: self.hi.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatReference {
+ fn clone(&self) -> Self {
+ PatReference {
+ attrs: self.attrs.clone(),
+ and_token: self.and_token.clone(),
+ mutability: self.mutability.clone(),
+ pat: self.pat.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatRest {
+ fn clone(&self) -> Self {
+ PatRest {
+ attrs: self.attrs.clone(),
+ dot2_token: self.dot2_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatSlice {
+ fn clone(&self) -> Self {
+ PatSlice {
+ attrs: self.attrs.clone(),
+ bracket_token: self.bracket_token.clone(),
+ elems: self.elems.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatStruct {
+ fn clone(&self) -> Self {
+ PatStruct {
+ attrs: self.attrs.clone(),
+ path: self.path.clone(),
+ brace_token: self.brace_token.clone(),
+ fields: self.fields.clone(),
+ dot2_token: self.dot2_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatTuple {
+ fn clone(&self) -> Self {
+ PatTuple {
+ attrs: self.attrs.clone(),
+ paren_token: self.paren_token.clone(),
+ elems: self.elems.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatTupleStruct {
+ fn clone(&self) -> Self {
+ PatTupleStruct {
+ attrs: self.attrs.clone(),
+ path: self.path.clone(),
+ pat: self.pat.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatType {
+ fn clone(&self) -> Self {
+ PatType {
+ attrs: self.attrs.clone(),
+ pat: self.pat.clone(),
+ colon_token: self.colon_token.clone(),
+ ty: self.ty.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PatWild {
+ fn clone(&self) -> Self {
+ PatWild {
+ attrs: self.attrs.clone(),
+ underscore_token: self.underscore_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Path {
+ fn clone(&self) -> Self {
+ Path {
+ leading_colon: self.leading_colon.clone(),
+ segments: self.segments.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PathArguments {
+ fn clone(&self) -> Self {
+ match self {
+ PathArguments::None => PathArguments::None,
+ PathArguments::AngleBracketed(v0) => {
+ PathArguments::AngleBracketed(v0.clone())
+ }
+ PathArguments::Parenthesized(v0) => PathArguments::Parenthesized(v0.clone()),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PathSegment {
+ fn clone(&self) -> Self {
+ PathSegment {
+ ident: self.ident.clone(),
+ arguments: self.arguments.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PredicateEq {
+ fn clone(&self) -> Self {
+ PredicateEq {
+ lhs_ty: self.lhs_ty.clone(),
+ eq_token: self.eq_token.clone(),
+ rhs_ty: self.rhs_ty.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PredicateLifetime {
+ fn clone(&self) -> Self {
+ PredicateLifetime {
+ lifetime: self.lifetime.clone(),
+ colon_token: self.colon_token.clone(),
+ bounds: self.bounds.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for PredicateType {
+ fn clone(&self) -> Self {
+ PredicateType {
+ lifetimes: self.lifetimes.clone(),
+ bounded_ty: self.bounded_ty.clone(),
+ colon_token: self.colon_token.clone(),
+ bounds: self.bounds.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for QSelf {
+ fn clone(&self) -> Self {
+ QSelf {
+ lt_token: self.lt_token.clone(),
+ ty: self.ty.clone(),
+ position: self.position.clone(),
+ as_token: self.as_token.clone(),
+ gt_token: self.gt_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Copy for RangeLimits {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for RangeLimits {
+ fn clone(&self) -> Self {
+ *self
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Receiver {
+ fn clone(&self) -> Self {
+ Receiver {
+ attrs: self.attrs.clone(),
+ reference: self.reference.clone(),
+ mutability: self.mutability.clone(),
+ self_token: self.self_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for ReturnType {
+ fn clone(&self) -> Self {
+ match self {
+ ReturnType::Default => ReturnType::Default,
+ ReturnType::Type(v0, v1) => ReturnType::Type(v0.clone(), v1.clone()),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Signature {
+ fn clone(&self) -> Self {
+ Signature {
+ constness: self.constness.clone(),
+ asyncness: self.asyncness.clone(),
+ unsafety: self.unsafety.clone(),
+ abi: self.abi.clone(),
+ fn_token: self.fn_token.clone(),
+ ident: self.ident.clone(),
+ generics: self.generics.clone(),
+ paren_token: self.paren_token.clone(),
+ inputs: self.inputs.clone(),
+ variadic: self.variadic.clone(),
+ output: self.output.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Stmt {
+ fn clone(&self) -> Self {
+ match self {
+ Stmt::Local(v0) => Stmt::Local(v0.clone()),
+ Stmt::Item(v0) => Stmt::Item(v0.clone()),
+ Stmt::Expr(v0) => Stmt::Expr(v0.clone()),
+ Stmt::Semi(v0, v1) => Stmt::Semi(v0.clone(), v1.clone()),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TraitBound {
+ fn clone(&self) -> Self {
+ TraitBound {
+ paren_token: self.paren_token.clone(),
+ modifier: self.modifier.clone(),
+ lifetimes: self.lifetimes.clone(),
+ path: self.path.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Copy for TraitBoundModifier {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TraitBoundModifier {
+ fn clone(&self) -> Self {
+ *self
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TraitItem {
+ fn clone(&self) -> Self {
+ match self {
+ TraitItem::Const(v0) => TraitItem::Const(v0.clone()),
+ TraitItem::Method(v0) => TraitItem::Method(v0.clone()),
+ TraitItem::Type(v0) => TraitItem::Type(v0.clone()),
+ TraitItem::Macro(v0) => TraitItem::Macro(v0.clone()),
+ TraitItem::Verbatim(v0) => TraitItem::Verbatim(v0.clone()),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TraitItemConst {
+ fn clone(&self) -> Self {
+ TraitItemConst {
+ attrs: self.attrs.clone(),
+ const_token: self.const_token.clone(),
+ ident: self.ident.clone(),
+ colon_token: self.colon_token.clone(),
+ ty: self.ty.clone(),
+ default: self.default.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TraitItemMacro {
+ fn clone(&self) -> Self {
+ TraitItemMacro {
+ attrs: self.attrs.clone(),
+ mac: self.mac.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TraitItemMethod {
+ fn clone(&self) -> Self {
+ TraitItemMethod {
+ attrs: self.attrs.clone(),
+ sig: self.sig.clone(),
+ default: self.default.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TraitItemType {
+ fn clone(&self) -> Self {
+ TraitItemType {
+ attrs: self.attrs.clone(),
+ type_token: self.type_token.clone(),
+ ident: self.ident.clone(),
+ generics: self.generics.clone(),
+ colon_token: self.colon_token.clone(),
+ bounds: self.bounds.clone(),
+ default: self.default.clone(),
+ semi_token: self.semi_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Type {
+ fn clone(&self) -> Self {
+ match self {
+ Type::Array(v0) => Type::Array(v0.clone()),
+ Type::BareFn(v0) => Type::BareFn(v0.clone()),
+ Type::Group(v0) => Type::Group(v0.clone()),
+ Type::ImplTrait(v0) => Type::ImplTrait(v0.clone()),
+ Type::Infer(v0) => Type::Infer(v0.clone()),
+ Type::Macro(v0) => Type::Macro(v0.clone()),
+ Type::Never(v0) => Type::Never(v0.clone()),
+ Type::Paren(v0) => Type::Paren(v0.clone()),
+ Type::Path(v0) => Type::Path(v0.clone()),
+ Type::Ptr(v0) => Type::Ptr(v0.clone()),
+ Type::Reference(v0) => Type::Reference(v0.clone()),
+ Type::Slice(v0) => Type::Slice(v0.clone()),
+ Type::TraitObject(v0) => Type::TraitObject(v0.clone()),
+ Type::Tuple(v0) => Type::Tuple(v0.clone()),
+ Type::Verbatim(v0) => Type::Verbatim(v0.clone()),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeArray {
+ fn clone(&self) -> Self {
+ TypeArray {
+ bracket_token: self.bracket_token.clone(),
+ elem: self.elem.clone(),
+ semi_token: self.semi_token.clone(),
+ len: self.len.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeBareFn {
+ fn clone(&self) -> Self {
+ TypeBareFn {
+ lifetimes: self.lifetimes.clone(),
+ unsafety: self.unsafety.clone(),
+ abi: self.abi.clone(),
+ fn_token: self.fn_token.clone(),
+ paren_token: self.paren_token.clone(),
+ inputs: self.inputs.clone(),
+ variadic: self.variadic.clone(),
+ output: self.output.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeGroup {
+ fn clone(&self) -> Self {
+ TypeGroup {
+ group_token: self.group_token.clone(),
+ elem: self.elem.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeImplTrait {
+ fn clone(&self) -> Self {
+ TypeImplTrait {
+ impl_token: self.impl_token.clone(),
+ bounds: self.bounds.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeInfer {
+ fn clone(&self) -> Self {
+ TypeInfer {
+ underscore_token: self.underscore_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeMacro {
+ fn clone(&self) -> Self {
+ TypeMacro { mac: self.mac.clone() }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeNever {
+ fn clone(&self) -> Self {
+ TypeNever {
+ bang_token: self.bang_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeParam {
+ fn clone(&self) -> Self {
+ TypeParam {
+ attrs: self.attrs.clone(),
+ ident: self.ident.clone(),
+ colon_token: self.colon_token.clone(),
+ bounds: self.bounds.clone(),
+ eq_token: self.eq_token.clone(),
+ default: self.default.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeParamBound {
+ fn clone(&self) -> Self {
+ match self {
+ TypeParamBound::Trait(v0) => TypeParamBound::Trait(v0.clone()),
+ TypeParamBound::Lifetime(v0) => TypeParamBound::Lifetime(v0.clone()),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeParen {
+ fn clone(&self) -> Self {
+ TypeParen {
+ paren_token: self.paren_token.clone(),
+ elem: self.elem.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypePath {
+ fn clone(&self) -> Self {
+ TypePath {
+ qself: self.qself.clone(),
+ path: self.path.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypePtr {
+ fn clone(&self) -> Self {
+ TypePtr {
+ star_token: self.star_token.clone(),
+ const_token: self.const_token.clone(),
+ mutability: self.mutability.clone(),
+ elem: self.elem.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeReference {
+ fn clone(&self) -> Self {
+ TypeReference {
+ and_token: self.and_token.clone(),
+ lifetime: self.lifetime.clone(),
+ mutability: self.mutability.clone(),
+ elem: self.elem.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeSlice {
+ fn clone(&self) -> Self {
+ TypeSlice {
+ bracket_token: self.bracket_token.clone(),
+ elem: self.elem.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeTraitObject {
+ fn clone(&self) -> Self {
+ TypeTraitObject {
+ dyn_token: self.dyn_token.clone(),
+ bounds: self.bounds.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for TypeTuple {
+ fn clone(&self) -> Self {
+ TypeTuple {
+ paren_token: self.paren_token.clone(),
+ elems: self.elems.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Copy for UnOp {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for UnOp {
+ fn clone(&self) -> Self {
+ *self
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for UseGlob {
+ fn clone(&self) -> Self {
+ UseGlob {
+ star_token: self.star_token.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for UseGroup {
+ fn clone(&self) -> Self {
+ UseGroup {
+ brace_token: self.brace_token.clone(),
+ items: self.items.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for UseName {
+ fn clone(&self) -> Self {
+ UseName {
+ ident: self.ident.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for UsePath {
+ fn clone(&self) -> Self {
+ UsePath {
+ ident: self.ident.clone(),
+ colon2_token: self.colon2_token.clone(),
+ tree: self.tree.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for UseRename {
+ fn clone(&self) -> Self {
+ UseRename {
+ ident: self.ident.clone(),
+ as_token: self.as_token.clone(),
+ rename: self.rename.clone(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for UseTree {
+ fn clone(&self) -> Self {
+ match self {
+ UseTree::Path(v0) => UseTree::Path(v0.clone()),
+ UseTree::Name(v0) => UseTree::Name(v0.clone()),
+ UseTree::Rename(v0) => UseTree::Rename(v0.clone()),
+ UseTree::Glob(v0) => UseTree::Glob(v0.clone()),
+ UseTree::Group(v0) => UseTree::Group(v0.clone()),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Variadic {
+ fn clone(&self) -> Self {
+ Variadic {
+ attrs: self.attrs.clone(),
+ dots: self.dots.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Variant {
+ fn clone(&self) -> Self {
+ Variant {
+ attrs: self.attrs.clone(),
+ ident: self.ident.clone(),
+ fields: self.fields.clone(),
+ discriminant: self.discriminant.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for VisCrate {
+ fn clone(&self) -> Self {
+ VisCrate {
+ crate_token: self.crate_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for VisPublic {
+ fn clone(&self) -> Self {
+ VisPublic {
+ pub_token: self.pub_token.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for VisRestricted {
+ fn clone(&self) -> Self {
+ VisRestricted {
+ pub_token: self.pub_token.clone(),
+ paren_token: self.paren_token.clone(),
+ in_token: self.in_token.clone(),
+ path: self.path.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Visibility {
+ fn clone(&self) -> Self {
+ match self {
+ Visibility::Public(v0) => Visibility::Public(v0.clone()),
+ Visibility::Crate(v0) => Visibility::Crate(v0.clone()),
+ Visibility::Restricted(v0) => Visibility::Restricted(v0.clone()),
+ Visibility::Inherited => Visibility::Inherited,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for WhereClause {
+ fn clone(&self) -> Self {
+ WhereClause {
+ where_token: self.where_token.clone(),
+ predicates: self.predicates.clone(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for WherePredicate {
+ fn clone(&self) -> Self {
+ match self {
+ WherePredicate::Type(v0) => WherePredicate::Type(v0.clone()),
+ WherePredicate::Lifetime(v0) => WherePredicate::Lifetime(v0.clone()),
+ WherePredicate::Eq(v0) => WherePredicate::Eq(v0.clone()),
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/gen/debug.rs b/third_party/rust/syn/src/gen/debug.rs
new file mode 100644
index 0000000000..a1f0afa790
--- /dev/null
+++ b/third_party/rust/syn/src/gen/debug.rs
@@ -0,0 +1,3042 @@
+// This file is @generated by syn-internal-codegen.
+// It is not intended for manual editing.
+
+use crate::*;
+use std::fmt::{self, Debug};
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Abi {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Abi");
+ formatter.field("extern_token", &self.extern_token);
+ formatter.field("name", &self.name);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for AngleBracketedGenericArguments {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("AngleBracketedGenericArguments");
+ formatter.field("colon2_token", &self.colon2_token);
+ formatter.field("lt_token", &self.lt_token);
+ formatter.field("args", &self.args);
+ formatter.field("gt_token", &self.gt_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Arm {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Arm");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("pat", &self.pat);
+ formatter.field("guard", &self.guard);
+ formatter.field("fat_arrow_token", &self.fat_arrow_token);
+ formatter.field("body", &self.body);
+ formatter.field("comma", &self.comma);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for AttrStyle {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ AttrStyle::Outer => formatter.write_str("Outer"),
+ AttrStyle::Inner(v0) => {
+ let mut formatter = formatter.debug_tuple("Inner");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Attribute {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Attribute");
+ formatter.field("pound_token", &self.pound_token);
+ formatter.field("style", &self.style);
+ formatter.field("bracket_token", &self.bracket_token);
+ formatter.field("path", &self.path);
+ formatter.field("tokens", &self.tokens);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for BareFnArg {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("BareFnArg");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("name", &self.name);
+ formatter.field("ty", &self.ty);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for BinOp {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ BinOp::Add(v0) => {
+ let mut formatter = formatter.debug_tuple("Add");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Sub(v0) => {
+ let mut formatter = formatter.debug_tuple("Sub");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Mul(v0) => {
+ let mut formatter = formatter.debug_tuple("Mul");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Div(v0) => {
+ let mut formatter = formatter.debug_tuple("Div");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Rem(v0) => {
+ let mut formatter = formatter.debug_tuple("Rem");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::And(v0) => {
+ let mut formatter = formatter.debug_tuple("And");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Or(v0) => {
+ let mut formatter = formatter.debug_tuple("Or");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::BitXor(v0) => {
+ let mut formatter = formatter.debug_tuple("BitXor");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::BitAnd(v0) => {
+ let mut formatter = formatter.debug_tuple("BitAnd");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::BitOr(v0) => {
+ let mut formatter = formatter.debug_tuple("BitOr");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Shl(v0) => {
+ let mut formatter = formatter.debug_tuple("Shl");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Shr(v0) => {
+ let mut formatter = formatter.debug_tuple("Shr");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Eq(v0) => {
+ let mut formatter = formatter.debug_tuple("Eq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Lt(v0) => {
+ let mut formatter = formatter.debug_tuple("Lt");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Le(v0) => {
+ let mut formatter = formatter.debug_tuple("Le");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Ne(v0) => {
+ let mut formatter = formatter.debug_tuple("Ne");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Ge(v0) => {
+ let mut formatter = formatter.debug_tuple("Ge");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::Gt(v0) => {
+ let mut formatter = formatter.debug_tuple("Gt");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::AddEq(v0) => {
+ let mut formatter = formatter.debug_tuple("AddEq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::SubEq(v0) => {
+ let mut formatter = formatter.debug_tuple("SubEq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::MulEq(v0) => {
+ let mut formatter = formatter.debug_tuple("MulEq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::DivEq(v0) => {
+ let mut formatter = formatter.debug_tuple("DivEq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::RemEq(v0) => {
+ let mut formatter = formatter.debug_tuple("RemEq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::BitXorEq(v0) => {
+ let mut formatter = formatter.debug_tuple("BitXorEq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::BitAndEq(v0) => {
+ let mut formatter = formatter.debug_tuple("BitAndEq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::BitOrEq(v0) => {
+ let mut formatter = formatter.debug_tuple("BitOrEq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::ShlEq(v0) => {
+ let mut formatter = formatter.debug_tuple("ShlEq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ BinOp::ShrEq(v0) => {
+ let mut formatter = formatter.debug_tuple("ShrEq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Binding {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Binding");
+ formatter.field("ident", &self.ident);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("ty", &self.ty);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Block {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Block");
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("stmts", &self.stmts);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for BoundLifetimes {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("BoundLifetimes");
+ formatter.field("for_token", &self.for_token);
+ formatter.field("lt_token", &self.lt_token);
+ formatter.field("lifetimes", &self.lifetimes);
+ formatter.field("gt_token", &self.gt_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ConstParam {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ConstParam");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("const_token", &self.const_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("ty", &self.ty);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("default", &self.default);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Constraint {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Constraint");
+ formatter.field("ident", &self.ident);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("bounds", &self.bounds);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Data {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Data::Struct(v0) => {
+ let mut formatter = formatter.debug_tuple("Struct");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Data::Enum(v0) => {
+ let mut formatter = formatter.debug_tuple("Enum");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Data::Union(v0) => {
+ let mut formatter = formatter.debug_tuple("Union");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for DataEnum {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("DataEnum");
+ formatter.field("enum_token", &self.enum_token);
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("variants", &self.variants);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for DataStruct {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("DataStruct");
+ formatter.field("struct_token", &self.struct_token);
+ formatter.field("fields", &self.fields);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for DataUnion {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("DataUnion");
+ formatter.field("union_token", &self.union_token);
+ formatter.field("fields", &self.fields);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for DeriveInput {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("DeriveInput");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("ident", &self.ident);
+ formatter.field("generics", &self.generics);
+ formatter.field("data", &self.data);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Expr {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ #[cfg(feature = "full")]
+ Expr::Array(v0) => {
+ let mut formatter = formatter.debug_tuple("Array");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Assign(v0) => {
+ let mut formatter = formatter.debug_tuple("Assign");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::AssignOp(v0) => {
+ let mut formatter = formatter.debug_tuple("AssignOp");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Async(v0) => {
+ let mut formatter = formatter.debug_tuple("Async");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Await(v0) => {
+ let mut formatter = formatter.debug_tuple("Await");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Expr::Binary(v0) => {
+ let mut formatter = formatter.debug_tuple("Binary");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Block(v0) => {
+ let mut formatter = formatter.debug_tuple("Block");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Box(v0) => {
+ let mut formatter = formatter.debug_tuple("Box");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Break(v0) => {
+ let mut formatter = formatter.debug_tuple("Break");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Expr::Call(v0) => {
+ let mut formatter = formatter.debug_tuple("Call");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Expr::Cast(v0) => {
+ let mut formatter = formatter.debug_tuple("Cast");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Closure(v0) => {
+ let mut formatter = formatter.debug_tuple("Closure");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Continue(v0) => {
+ let mut formatter = formatter.debug_tuple("Continue");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Expr::Field(v0) => {
+ let mut formatter = formatter.debug_tuple("Field");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::ForLoop(v0) => {
+ let mut formatter = formatter.debug_tuple("ForLoop");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Group(v0) => {
+ let mut formatter = formatter.debug_tuple("Group");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::If(v0) => {
+ let mut formatter = formatter.debug_tuple("If");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Expr::Index(v0) => {
+ let mut formatter = formatter.debug_tuple("Index");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Let(v0) => {
+ let mut formatter = formatter.debug_tuple("Let");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Expr::Lit(v0) => {
+ let mut formatter = formatter.debug_tuple("Lit");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Loop(v0) => {
+ let mut formatter = formatter.debug_tuple("Loop");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Macro(v0) => {
+ let mut formatter = formatter.debug_tuple("Macro");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Match(v0) => {
+ let mut formatter = formatter.debug_tuple("Match");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::MethodCall(v0) => {
+ let mut formatter = formatter.debug_tuple("MethodCall");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Expr::Paren(v0) => {
+ let mut formatter = formatter.debug_tuple("Paren");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Expr::Path(v0) => {
+ let mut formatter = formatter.debug_tuple("Path");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Range(v0) => {
+ let mut formatter = formatter.debug_tuple("Range");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Reference(v0) => {
+ let mut formatter = formatter.debug_tuple("Reference");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Repeat(v0) => {
+ let mut formatter = formatter.debug_tuple("Repeat");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Return(v0) => {
+ let mut formatter = formatter.debug_tuple("Return");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Struct(v0) => {
+ let mut formatter = formatter.debug_tuple("Struct");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Try(v0) => {
+ let mut formatter = formatter.debug_tuple("Try");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::TryBlock(v0) => {
+ let mut formatter = formatter.debug_tuple("TryBlock");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Tuple(v0) => {
+ let mut formatter = formatter.debug_tuple("Tuple");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Type(v0) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Expr::Unary(v0) => {
+ let mut formatter = formatter.debug_tuple("Unary");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Unsafe(v0) => {
+ let mut formatter = formatter.debug_tuple("Unsafe");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Expr::Verbatim(v0) => {
+ let mut formatter = formatter.debug_tuple("Verbatim");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::While(v0) => {
+ let mut formatter = formatter.debug_tuple("While");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(feature = "full")]
+ Expr::Yield(v0) => {
+ let mut formatter = formatter.debug_tuple("Yield");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(any(syn_no_non_exhaustive, not(feature = "full")))]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprArray {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprArray");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("bracket_token", &self.bracket_token);
+ formatter.field("elems", &self.elems);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprAssign {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprAssign");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("left", &self.left);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("right", &self.right);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprAssignOp {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprAssignOp");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("left", &self.left);
+ formatter.field("op", &self.op);
+ formatter.field("right", &self.right);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprAsync {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprAsync");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("async_token", &self.async_token);
+ formatter.field("capture", &self.capture);
+ formatter.field("block", &self.block);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprAwait {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprAwait");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("base", &self.base);
+ formatter.field("dot_token", &self.dot_token);
+ formatter.field("await_token", &self.await_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprBinary {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprBinary");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("left", &self.left);
+ formatter.field("op", &self.op);
+ formatter.field("right", &self.right);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprBlock {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprBlock");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("label", &self.label);
+ formatter.field("block", &self.block);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprBox {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprBox");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("box_token", &self.box_token);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprBreak {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprBreak");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("break_token", &self.break_token);
+ formatter.field("label", &self.label);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprCall {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprCall");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("func", &self.func);
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("args", &self.args);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprCast {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprCast");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("expr", &self.expr);
+ formatter.field("as_token", &self.as_token);
+ formatter.field("ty", &self.ty);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprClosure {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprClosure");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("movability", &self.movability);
+ formatter.field("asyncness", &self.asyncness);
+ formatter.field("capture", &self.capture);
+ formatter.field("or1_token", &self.or1_token);
+ formatter.field("inputs", &self.inputs);
+ formatter.field("or2_token", &self.or2_token);
+ formatter.field("output", &self.output);
+ formatter.field("body", &self.body);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprContinue {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprContinue");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("continue_token", &self.continue_token);
+ formatter.field("label", &self.label);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprField {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprField");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("base", &self.base);
+ formatter.field("dot_token", &self.dot_token);
+ formatter.field("member", &self.member);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprForLoop {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprForLoop");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("label", &self.label);
+ formatter.field("for_token", &self.for_token);
+ formatter.field("pat", &self.pat);
+ formatter.field("in_token", &self.in_token);
+ formatter.field("expr", &self.expr);
+ formatter.field("body", &self.body);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprGroup {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprGroup");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("group_token", &self.group_token);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprIf {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprIf");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("if_token", &self.if_token);
+ formatter.field("cond", &self.cond);
+ formatter.field("then_branch", &self.then_branch);
+ formatter.field("else_branch", &self.else_branch);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprIndex {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprIndex");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("expr", &self.expr);
+ formatter.field("bracket_token", &self.bracket_token);
+ formatter.field("index", &self.index);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprLet {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprLet");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("let_token", &self.let_token);
+ formatter.field("pat", &self.pat);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprLit {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprLit");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("lit", &self.lit);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprLoop {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprLoop");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("label", &self.label);
+ formatter.field("loop_token", &self.loop_token);
+ formatter.field("body", &self.body);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprMacro {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprMacro");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("mac", &self.mac);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprMatch {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprMatch");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("match_token", &self.match_token);
+ formatter.field("expr", &self.expr);
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("arms", &self.arms);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprMethodCall {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprMethodCall");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("receiver", &self.receiver);
+ formatter.field("dot_token", &self.dot_token);
+ formatter.field("method", &self.method);
+ formatter.field("turbofish", &self.turbofish);
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("args", &self.args);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprParen {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprParen");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprPath {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprPath");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("qself", &self.qself);
+ formatter.field("path", &self.path);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprRange {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprRange");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("from", &self.from);
+ formatter.field("limits", &self.limits);
+ formatter.field("to", &self.to);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprReference {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprReference");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("and_token", &self.and_token);
+ formatter.field("raw", &self.raw);
+ formatter.field("mutability", &self.mutability);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprRepeat {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprRepeat");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("bracket_token", &self.bracket_token);
+ formatter.field("expr", &self.expr);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.field("len", &self.len);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprReturn {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprReturn");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("return_token", &self.return_token);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprStruct {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprStruct");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("path", &self.path);
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("fields", &self.fields);
+ formatter.field("dot2_token", &self.dot2_token);
+ formatter.field("rest", &self.rest);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprTry {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprTry");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("expr", &self.expr);
+ formatter.field("question_token", &self.question_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprTryBlock {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprTryBlock");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("try_token", &self.try_token);
+ formatter.field("block", &self.block);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprTuple {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprTuple");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("elems", &self.elems);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprType {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprType");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("expr", &self.expr);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("ty", &self.ty);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprUnary {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprUnary");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("op", &self.op);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprUnsafe {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprUnsafe");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("unsafe_token", &self.unsafe_token);
+ formatter.field("block", &self.block);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprWhile {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprWhile");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("label", &self.label);
+ formatter.field("while_token", &self.while_token);
+ formatter.field("cond", &self.cond);
+ formatter.field("body", &self.body);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ExprYield {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ExprYield");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("yield_token", &self.yield_token);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Field {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Field");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("ident", &self.ident);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("ty", &self.ty);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for FieldPat {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("FieldPat");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("member", &self.member);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("pat", &self.pat);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for FieldValue {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("FieldValue");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("member", &self.member);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Fields {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Fields::Named(v0) => {
+ let mut formatter = formatter.debug_tuple("Named");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Fields::Unnamed(v0) => {
+ let mut formatter = formatter.debug_tuple("Unnamed");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Fields::Unit => formatter.write_str("Unit"),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for FieldsNamed {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("FieldsNamed");
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("named", &self.named);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for FieldsUnnamed {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("FieldsUnnamed");
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("unnamed", &self.unnamed);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for File {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("File");
+ formatter.field("shebang", &self.shebang);
+ formatter.field("attrs", &self.attrs);
+ formatter.field("items", &self.items);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for FnArg {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ FnArg::Receiver(v0) => {
+ let mut formatter = formatter.debug_tuple("Receiver");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ FnArg::Typed(v0) => {
+ let mut formatter = formatter.debug_tuple("Typed");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ForeignItem {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ ForeignItem::Fn(v0) => {
+ let mut formatter = formatter.debug_tuple("Fn");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ ForeignItem::Static(v0) => {
+ let mut formatter = formatter.debug_tuple("Static");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ ForeignItem::Type(v0) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ ForeignItem::Macro(v0) => {
+ let mut formatter = formatter.debug_tuple("Macro");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ ForeignItem::Verbatim(v0) => {
+ let mut formatter = formatter.debug_tuple("Verbatim");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ForeignItemFn {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ForeignItemFn");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("sig", &self.sig);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ForeignItemMacro {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ForeignItemMacro");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("mac", &self.mac);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ForeignItemStatic {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ForeignItemStatic");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("static_token", &self.static_token);
+ formatter.field("mutability", &self.mutability);
+ formatter.field("ident", &self.ident);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("ty", &self.ty);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ForeignItemType {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ForeignItemType");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("type_token", &self.type_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for GenericArgument {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ GenericArgument::Lifetime(v0) => {
+ let mut formatter = formatter.debug_tuple("Lifetime");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ GenericArgument::Type(v0) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ GenericArgument::Const(v0) => {
+ let mut formatter = formatter.debug_tuple("Const");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ GenericArgument::Binding(v0) => {
+ let mut formatter = formatter.debug_tuple("Binding");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ GenericArgument::Constraint(v0) => {
+ let mut formatter = formatter.debug_tuple("Constraint");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for GenericMethodArgument {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ GenericMethodArgument::Type(v0) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ GenericMethodArgument::Const(v0) => {
+ let mut formatter = formatter.debug_tuple("Const");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for GenericParam {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ GenericParam::Type(v0) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ GenericParam::Lifetime(v0) => {
+ let mut formatter = formatter.debug_tuple("Lifetime");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ GenericParam::Const(v0) => {
+ let mut formatter = formatter.debug_tuple("Const");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Generics {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Generics");
+ formatter.field("lt_token", &self.lt_token);
+ formatter.field("params", &self.params);
+ formatter.field("gt_token", &self.gt_token);
+ formatter.field("where_clause", &self.where_clause);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ImplItem {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ ImplItem::Const(v0) => {
+ let mut formatter = formatter.debug_tuple("Const");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ ImplItem::Method(v0) => {
+ let mut formatter = formatter.debug_tuple("Method");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ ImplItem::Type(v0) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ ImplItem::Macro(v0) => {
+ let mut formatter = formatter.debug_tuple("Macro");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ ImplItem::Verbatim(v0) => {
+ let mut formatter = formatter.debug_tuple("Verbatim");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ImplItemConst {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ImplItemConst");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("defaultness", &self.defaultness);
+ formatter.field("const_token", &self.const_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("ty", &self.ty);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("expr", &self.expr);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ImplItemMacro {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ImplItemMacro");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("mac", &self.mac);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ImplItemMethod {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ImplItemMethod");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("defaultness", &self.defaultness);
+ formatter.field("sig", &self.sig);
+ formatter.field("block", &self.block);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ImplItemType {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ImplItemType");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("defaultness", &self.defaultness);
+ formatter.field("type_token", &self.type_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("generics", &self.generics);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("ty", &self.ty);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Index {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Index");
+ formatter.field("index", &self.index);
+ formatter.field("span", &self.span);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Item {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Item::Const(v0) => {
+ let mut formatter = formatter.debug_tuple("Const");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Enum(v0) => {
+ let mut formatter = formatter.debug_tuple("Enum");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::ExternCrate(v0) => {
+ let mut formatter = formatter.debug_tuple("ExternCrate");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Fn(v0) => {
+ let mut formatter = formatter.debug_tuple("Fn");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::ForeignMod(v0) => {
+ let mut formatter = formatter.debug_tuple("ForeignMod");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Impl(v0) => {
+ let mut formatter = formatter.debug_tuple("Impl");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Macro(v0) => {
+ let mut formatter = formatter.debug_tuple("Macro");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Macro2(v0) => {
+ let mut formatter = formatter.debug_tuple("Macro2");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Mod(v0) => {
+ let mut formatter = formatter.debug_tuple("Mod");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Static(v0) => {
+ let mut formatter = formatter.debug_tuple("Static");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Struct(v0) => {
+ let mut formatter = formatter.debug_tuple("Struct");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Trait(v0) => {
+ let mut formatter = formatter.debug_tuple("Trait");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::TraitAlias(v0) => {
+ let mut formatter = formatter.debug_tuple("TraitAlias");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Type(v0) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Union(v0) => {
+ let mut formatter = formatter.debug_tuple("Union");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Use(v0) => {
+ let mut formatter = formatter.debug_tuple("Use");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Item::Verbatim(v0) => {
+ let mut formatter = formatter.debug_tuple("Verbatim");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemConst {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemConst");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("const_token", &self.const_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("ty", &self.ty);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("expr", &self.expr);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemEnum {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemEnum");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("enum_token", &self.enum_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("generics", &self.generics);
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("variants", &self.variants);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemExternCrate {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemExternCrate");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("extern_token", &self.extern_token);
+ formatter.field("crate_token", &self.crate_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("rename", &self.rename);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemFn {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemFn");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("sig", &self.sig);
+ formatter.field("block", &self.block);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemForeignMod {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemForeignMod");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("abi", &self.abi);
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("items", &self.items);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemImpl {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemImpl");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("defaultness", &self.defaultness);
+ formatter.field("unsafety", &self.unsafety);
+ formatter.field("impl_token", &self.impl_token);
+ formatter.field("generics", &self.generics);
+ formatter.field("trait_", &self.trait_);
+ formatter.field("self_ty", &self.self_ty);
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("items", &self.items);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemMacro {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemMacro");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("ident", &self.ident);
+ formatter.field("mac", &self.mac);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemMacro2 {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemMacro2");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("macro_token", &self.macro_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("rules", &self.rules);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemMod {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemMod");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("mod_token", &self.mod_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("content", &self.content);
+ formatter.field("semi", &self.semi);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemStatic {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemStatic");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("static_token", &self.static_token);
+ formatter.field("mutability", &self.mutability);
+ formatter.field("ident", &self.ident);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("ty", &self.ty);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("expr", &self.expr);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemStruct {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemStruct");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("struct_token", &self.struct_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("generics", &self.generics);
+ formatter.field("fields", &self.fields);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemTrait {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemTrait");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("unsafety", &self.unsafety);
+ formatter.field("auto_token", &self.auto_token);
+ formatter.field("trait_token", &self.trait_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("generics", &self.generics);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("supertraits", &self.supertraits);
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("items", &self.items);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemTraitAlias {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemTraitAlias");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("trait_token", &self.trait_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("generics", &self.generics);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("bounds", &self.bounds);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemType {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemType");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("type_token", &self.type_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("generics", &self.generics);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("ty", &self.ty);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemUnion {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemUnion");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("union_token", &self.union_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("generics", &self.generics);
+ formatter.field("fields", &self.fields);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ItemUse {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ItemUse");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("vis", &self.vis);
+ formatter.field("use_token", &self.use_token);
+ formatter.field("leading_colon", &self.leading_colon);
+ formatter.field("tree", &self.tree);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Label {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Label");
+ formatter.field("name", &self.name);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.finish()
+ }
+}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Lifetime {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Lifetime");
+ formatter.field("apostrophe", &self.apostrophe);
+ formatter.field("ident", &self.ident);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for LifetimeDef {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("LifetimeDef");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("lifetime", &self.lifetime);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("bounds", &self.bounds);
+ formatter.finish()
+ }
+}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Lit {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Lit::Str(v0) => {
+ let mut formatter = formatter.debug_tuple("Str");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Lit::ByteStr(v0) => {
+ let mut formatter = formatter.debug_tuple("ByteStr");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Lit::Byte(v0) => {
+ let mut formatter = formatter.debug_tuple("Byte");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Lit::Char(v0) => {
+ let mut formatter = formatter.debug_tuple("Char");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Lit::Int(v0) => {
+ let mut formatter = formatter.debug_tuple("Int");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Lit::Float(v0) => {
+ let mut formatter = formatter.debug_tuple("Float");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Lit::Bool(v0) => {
+ let mut formatter = formatter.debug_tuple("Bool");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Lit::Verbatim(v0) => {
+ let mut formatter = formatter.debug_tuple("Verbatim");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Local {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Local");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("let_token", &self.let_token);
+ formatter.field("pat", &self.pat);
+ formatter.field("init", &self.init);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Macro {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Macro");
+ formatter.field("path", &self.path);
+ formatter.field("bang_token", &self.bang_token);
+ formatter.field("delimiter", &self.delimiter);
+ formatter.field("tokens", &self.tokens);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for MacroDelimiter {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ MacroDelimiter::Paren(v0) => {
+ let mut formatter = formatter.debug_tuple("Paren");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ MacroDelimiter::Brace(v0) => {
+ let mut formatter = formatter.debug_tuple("Brace");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ MacroDelimiter::Bracket(v0) => {
+ let mut formatter = formatter.debug_tuple("Bracket");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Member {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Member::Named(v0) => {
+ let mut formatter = formatter.debug_tuple("Named");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Member::Unnamed(v0) => {
+ let mut formatter = formatter.debug_tuple("Unnamed");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Meta {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Meta::Path(v0) => {
+ let mut formatter = formatter.debug_tuple("Path");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Meta::List(v0) => {
+ let mut formatter = formatter.debug_tuple("List");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Meta::NameValue(v0) => {
+ let mut formatter = formatter.debug_tuple("NameValue");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for MetaList {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("MetaList");
+ formatter.field("path", &self.path);
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("nested", &self.nested);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for MetaNameValue {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("MetaNameValue");
+ formatter.field("path", &self.path);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("lit", &self.lit);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for MethodTurbofish {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("MethodTurbofish");
+ formatter.field("colon2_token", &self.colon2_token);
+ formatter.field("lt_token", &self.lt_token);
+ formatter.field("args", &self.args);
+ formatter.field("gt_token", &self.gt_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for NestedMeta {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ NestedMeta::Meta(v0) => {
+ let mut formatter = formatter.debug_tuple("Meta");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ NestedMeta::Lit(v0) => {
+ let mut formatter = formatter.debug_tuple("Lit");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ParenthesizedGenericArguments {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("ParenthesizedGenericArguments");
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("inputs", &self.inputs);
+ formatter.field("output", &self.output);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Pat {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Pat::Box(v0) => {
+ let mut formatter = formatter.debug_tuple("Box");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Ident(v0) => {
+ let mut formatter = formatter.debug_tuple("Ident");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Lit(v0) => {
+ let mut formatter = formatter.debug_tuple("Lit");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Macro(v0) => {
+ let mut formatter = formatter.debug_tuple("Macro");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Or(v0) => {
+ let mut formatter = formatter.debug_tuple("Or");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Path(v0) => {
+ let mut formatter = formatter.debug_tuple("Path");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Range(v0) => {
+ let mut formatter = formatter.debug_tuple("Range");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Reference(v0) => {
+ let mut formatter = formatter.debug_tuple("Reference");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Rest(v0) => {
+ let mut formatter = formatter.debug_tuple("Rest");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Slice(v0) => {
+ let mut formatter = formatter.debug_tuple("Slice");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Struct(v0) => {
+ let mut formatter = formatter.debug_tuple("Struct");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Tuple(v0) => {
+ let mut formatter = formatter.debug_tuple("Tuple");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::TupleStruct(v0) => {
+ let mut formatter = formatter.debug_tuple("TupleStruct");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Type(v0) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Verbatim(v0) => {
+ let mut formatter = formatter.debug_tuple("Verbatim");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Pat::Wild(v0) => {
+ let mut formatter = formatter.debug_tuple("Wild");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatBox {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatBox");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("box_token", &self.box_token);
+ formatter.field("pat", &self.pat);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatIdent {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatIdent");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("by_ref", &self.by_ref);
+ formatter.field("mutability", &self.mutability);
+ formatter.field("ident", &self.ident);
+ formatter.field("subpat", &self.subpat);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatLit {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatLit");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("expr", &self.expr);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatMacro {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatMacro");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("mac", &self.mac);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatOr {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatOr");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("leading_vert", &self.leading_vert);
+ formatter.field("cases", &self.cases);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatPath {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatPath");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("qself", &self.qself);
+ formatter.field("path", &self.path);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatRange {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatRange");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("lo", &self.lo);
+ formatter.field("limits", &self.limits);
+ formatter.field("hi", &self.hi);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatReference {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatReference");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("and_token", &self.and_token);
+ formatter.field("mutability", &self.mutability);
+ formatter.field("pat", &self.pat);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatRest {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatRest");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("dot2_token", &self.dot2_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatSlice {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatSlice");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("bracket_token", &self.bracket_token);
+ formatter.field("elems", &self.elems);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatStruct {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatStruct");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("path", &self.path);
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("fields", &self.fields);
+ formatter.field("dot2_token", &self.dot2_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatTuple {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatTuple");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("elems", &self.elems);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatTupleStruct {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatTupleStruct");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("path", &self.path);
+ formatter.field("pat", &self.pat);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatType {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatType");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("pat", &self.pat);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("ty", &self.ty);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PatWild {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PatWild");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("underscore_token", &self.underscore_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Path {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Path");
+ formatter.field("leading_colon", &self.leading_colon);
+ formatter.field("segments", &self.segments);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PathArguments {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ PathArguments::None => formatter.write_str("None"),
+ PathArguments::AngleBracketed(v0) => {
+ let mut formatter = formatter.debug_tuple("AngleBracketed");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ PathArguments::Parenthesized(v0) => {
+ let mut formatter = formatter.debug_tuple("Parenthesized");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PathSegment {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PathSegment");
+ formatter.field("ident", &self.ident);
+ formatter.field("arguments", &self.arguments);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PredicateEq {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PredicateEq");
+ formatter.field("lhs_ty", &self.lhs_ty);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("rhs_ty", &self.rhs_ty);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PredicateLifetime {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PredicateLifetime");
+ formatter.field("lifetime", &self.lifetime);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("bounds", &self.bounds);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for PredicateType {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("PredicateType");
+ formatter.field("lifetimes", &self.lifetimes);
+ formatter.field("bounded_ty", &self.bounded_ty);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("bounds", &self.bounds);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for QSelf {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("QSelf");
+ formatter.field("lt_token", &self.lt_token);
+ formatter.field("ty", &self.ty);
+ formatter.field("position", &self.position);
+ formatter.field("as_token", &self.as_token);
+ formatter.field("gt_token", &self.gt_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for RangeLimits {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ RangeLimits::HalfOpen(v0) => {
+ let mut formatter = formatter.debug_tuple("HalfOpen");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ RangeLimits::Closed(v0) => {
+ let mut formatter = formatter.debug_tuple("Closed");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Receiver {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Receiver");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("reference", &self.reference);
+ formatter.field("mutability", &self.mutability);
+ formatter.field("self_token", &self.self_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for ReturnType {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ ReturnType::Default => formatter.write_str("Default"),
+ ReturnType::Type(v0, v1) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.field(v1);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Signature {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Signature");
+ formatter.field("constness", &self.constness);
+ formatter.field("asyncness", &self.asyncness);
+ formatter.field("unsafety", &self.unsafety);
+ formatter.field("abi", &self.abi);
+ formatter.field("fn_token", &self.fn_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("generics", &self.generics);
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("inputs", &self.inputs);
+ formatter.field("variadic", &self.variadic);
+ formatter.field("output", &self.output);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Stmt {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Stmt::Local(v0) => {
+ let mut formatter = formatter.debug_tuple("Local");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Stmt::Item(v0) => {
+ let mut formatter = formatter.debug_tuple("Item");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Stmt::Expr(v0) => {
+ let mut formatter = formatter.debug_tuple("Expr");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Stmt::Semi(v0, v1) => {
+ let mut formatter = formatter.debug_tuple("Semi");
+ formatter.field(v0);
+ formatter.field(v1);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TraitBound {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TraitBound");
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("modifier", &self.modifier);
+ formatter.field("lifetimes", &self.lifetimes);
+ formatter.field("path", &self.path);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TraitBoundModifier {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ TraitBoundModifier::None => formatter.write_str("None"),
+ TraitBoundModifier::Maybe(v0) => {
+ let mut formatter = formatter.debug_tuple("Maybe");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TraitItem {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ TraitItem::Const(v0) => {
+ let mut formatter = formatter.debug_tuple("Const");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ TraitItem::Method(v0) => {
+ let mut formatter = formatter.debug_tuple("Method");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ TraitItem::Type(v0) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ TraitItem::Macro(v0) => {
+ let mut formatter = formatter.debug_tuple("Macro");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ TraitItem::Verbatim(v0) => {
+ let mut formatter = formatter.debug_tuple("Verbatim");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TraitItemConst {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TraitItemConst");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("const_token", &self.const_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("ty", &self.ty);
+ formatter.field("default", &self.default);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TraitItemMacro {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TraitItemMacro");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("mac", &self.mac);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TraitItemMethod {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TraitItemMethod");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("sig", &self.sig);
+ formatter.field("default", &self.default);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TraitItemType {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TraitItemType");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("type_token", &self.type_token);
+ formatter.field("ident", &self.ident);
+ formatter.field("generics", &self.generics);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("bounds", &self.bounds);
+ formatter.field("default", &self.default);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Type {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Type::Array(v0) => {
+ let mut formatter = formatter.debug_tuple("Array");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::BareFn(v0) => {
+ let mut formatter = formatter.debug_tuple("BareFn");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Group(v0) => {
+ let mut formatter = formatter.debug_tuple("Group");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::ImplTrait(v0) => {
+ let mut formatter = formatter.debug_tuple("ImplTrait");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Infer(v0) => {
+ let mut formatter = formatter.debug_tuple("Infer");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Macro(v0) => {
+ let mut formatter = formatter.debug_tuple("Macro");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Never(v0) => {
+ let mut formatter = formatter.debug_tuple("Never");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Paren(v0) => {
+ let mut formatter = formatter.debug_tuple("Paren");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Path(v0) => {
+ let mut formatter = formatter.debug_tuple("Path");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Ptr(v0) => {
+ let mut formatter = formatter.debug_tuple("Ptr");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Reference(v0) => {
+ let mut formatter = formatter.debug_tuple("Reference");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Slice(v0) => {
+ let mut formatter = formatter.debug_tuple("Slice");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::TraitObject(v0) => {
+ let mut formatter = formatter.debug_tuple("TraitObject");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Tuple(v0) => {
+ let mut formatter = formatter.debug_tuple("Tuple");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Type::Verbatim(v0) => {
+ let mut formatter = formatter.debug_tuple("Verbatim");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeArray {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeArray");
+ formatter.field("bracket_token", &self.bracket_token);
+ formatter.field("elem", &self.elem);
+ formatter.field("semi_token", &self.semi_token);
+ formatter.field("len", &self.len);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeBareFn {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeBareFn");
+ formatter.field("lifetimes", &self.lifetimes);
+ formatter.field("unsafety", &self.unsafety);
+ formatter.field("abi", &self.abi);
+ formatter.field("fn_token", &self.fn_token);
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("inputs", &self.inputs);
+ formatter.field("variadic", &self.variadic);
+ formatter.field("output", &self.output);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeGroup {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeGroup");
+ formatter.field("group_token", &self.group_token);
+ formatter.field("elem", &self.elem);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeImplTrait {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeImplTrait");
+ formatter.field("impl_token", &self.impl_token);
+ formatter.field("bounds", &self.bounds);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeInfer {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeInfer");
+ formatter.field("underscore_token", &self.underscore_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeMacro {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeMacro");
+ formatter.field("mac", &self.mac);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeNever {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeNever");
+ formatter.field("bang_token", &self.bang_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeParam {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeParam");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("ident", &self.ident);
+ formatter.field("colon_token", &self.colon_token);
+ formatter.field("bounds", &self.bounds);
+ formatter.field("eq_token", &self.eq_token);
+ formatter.field("default", &self.default);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeParamBound {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ TypeParamBound::Trait(v0) => {
+ let mut formatter = formatter.debug_tuple("Trait");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ TypeParamBound::Lifetime(v0) => {
+ let mut formatter = formatter.debug_tuple("Lifetime");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeParen {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeParen");
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("elem", &self.elem);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypePath {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypePath");
+ formatter.field("qself", &self.qself);
+ formatter.field("path", &self.path);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypePtr {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypePtr");
+ formatter.field("star_token", &self.star_token);
+ formatter.field("const_token", &self.const_token);
+ formatter.field("mutability", &self.mutability);
+ formatter.field("elem", &self.elem);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeReference {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeReference");
+ formatter.field("and_token", &self.and_token);
+ formatter.field("lifetime", &self.lifetime);
+ formatter.field("mutability", &self.mutability);
+ formatter.field("elem", &self.elem);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeSlice {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeSlice");
+ formatter.field("bracket_token", &self.bracket_token);
+ formatter.field("elem", &self.elem);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeTraitObject {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeTraitObject");
+ formatter.field("dyn_token", &self.dyn_token);
+ formatter.field("bounds", &self.bounds);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for TypeTuple {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("TypeTuple");
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("elems", &self.elems);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for UnOp {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ UnOp::Deref(v0) => {
+ let mut formatter = formatter.debug_tuple("Deref");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ UnOp::Not(v0) => {
+ let mut formatter = formatter.debug_tuple("Not");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ UnOp::Neg(v0) => {
+ let mut formatter = formatter.debug_tuple("Neg");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for UseGlob {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("UseGlob");
+ formatter.field("star_token", &self.star_token);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for UseGroup {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("UseGroup");
+ formatter.field("brace_token", &self.brace_token);
+ formatter.field("items", &self.items);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for UseName {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("UseName");
+ formatter.field("ident", &self.ident);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for UsePath {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("UsePath");
+ formatter.field("ident", &self.ident);
+ formatter.field("colon2_token", &self.colon2_token);
+ formatter.field("tree", &self.tree);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for UseRename {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("UseRename");
+ formatter.field("ident", &self.ident);
+ formatter.field("as_token", &self.as_token);
+ formatter.field("rename", &self.rename);
+ formatter.finish()
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for UseTree {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ UseTree::Path(v0) => {
+ let mut formatter = formatter.debug_tuple("Path");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ UseTree::Name(v0) => {
+ let mut formatter = formatter.debug_tuple("Name");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ UseTree::Rename(v0) => {
+ let mut formatter = formatter.debug_tuple("Rename");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ UseTree::Glob(v0) => {
+ let mut formatter = formatter.debug_tuple("Glob");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ UseTree::Group(v0) => {
+ let mut formatter = formatter.debug_tuple("Group");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Variadic {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Variadic");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("dots", &self.dots);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Variant {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("Variant");
+ formatter.field("attrs", &self.attrs);
+ formatter.field("ident", &self.ident);
+ formatter.field("fields", &self.fields);
+ formatter.field("discriminant", &self.discriminant);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for VisCrate {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("VisCrate");
+ formatter.field("crate_token", &self.crate_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for VisPublic {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("VisPublic");
+ formatter.field("pub_token", &self.pub_token);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for VisRestricted {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("VisRestricted");
+ formatter.field("pub_token", &self.pub_token);
+ formatter.field("paren_token", &self.paren_token);
+ formatter.field("in_token", &self.in_token);
+ formatter.field("path", &self.path);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Visibility {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ Visibility::Public(v0) => {
+ let mut formatter = formatter.debug_tuple("Public");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Visibility::Crate(v0) => {
+ let mut formatter = formatter.debug_tuple("Crate");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Visibility::Restricted(v0) => {
+ let mut formatter = formatter.debug_tuple("Restricted");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ Visibility::Inherited => formatter.write_str("Inherited"),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for WhereClause {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let mut formatter = formatter.debug_struct("WhereClause");
+ formatter.field("where_token", &self.where_token);
+ formatter.field("predicates", &self.predicates);
+ formatter.finish()
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for WherePredicate {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self {
+ WherePredicate::Type(v0) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ WherePredicate::Lifetime(v0) => {
+ let mut formatter = formatter.debug_tuple("Lifetime");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ WherePredicate::Eq(v0) => {
+ let mut formatter = formatter.debug_tuple("Eq");
+ formatter.field(v0);
+ formatter.finish()
+ }
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/gen/eq.rs b/third_party/rust/syn/src/gen/eq.rs
new file mode 100644
index 0000000000..20acb809d8
--- /dev/null
+++ b/third_party/rust/syn/src/gen/eq.rs
@@ -0,0 +1,2195 @@
+// This file is @generated by syn-internal-codegen.
+// It is not intended for manual editing.
+
+#[cfg(any(feature = "derive", feature = "full"))]
+use crate::tt::TokenStreamHelper;
+use crate::*;
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Abi {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Abi {
+ fn eq(&self, other: &Self) -> bool {
+ self.name == other.name
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for AngleBracketedGenericArguments {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for AngleBracketedGenericArguments {
+ fn eq(&self, other: &Self) -> bool {
+ self.colon2_token == other.colon2_token && self.args == other.args
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Arm {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Arm {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.pat == other.pat && self.guard == other.guard
+ && self.body == other.body && self.comma == other.comma
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for AttrStyle {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for AttrStyle {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (AttrStyle::Outer, AttrStyle::Outer) => true,
+ (AttrStyle::Inner(_), AttrStyle::Inner(_)) => true,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Attribute {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Attribute {
+ fn eq(&self, other: &Self) -> bool {
+ self.style == other.style && self.path == other.path
+ && TokenStreamHelper(&self.tokens) == TokenStreamHelper(&other.tokens)
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for BareFnArg {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for BareFnArg {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.name == other.name && self.ty == other.ty
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for BinOp {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for BinOp {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (BinOp::Add(_), BinOp::Add(_)) => true,
+ (BinOp::Sub(_), BinOp::Sub(_)) => true,
+ (BinOp::Mul(_), BinOp::Mul(_)) => true,
+ (BinOp::Div(_), BinOp::Div(_)) => true,
+ (BinOp::Rem(_), BinOp::Rem(_)) => true,
+ (BinOp::And(_), BinOp::And(_)) => true,
+ (BinOp::Or(_), BinOp::Or(_)) => true,
+ (BinOp::BitXor(_), BinOp::BitXor(_)) => true,
+ (BinOp::BitAnd(_), BinOp::BitAnd(_)) => true,
+ (BinOp::BitOr(_), BinOp::BitOr(_)) => true,
+ (BinOp::Shl(_), BinOp::Shl(_)) => true,
+ (BinOp::Shr(_), BinOp::Shr(_)) => true,
+ (BinOp::Eq(_), BinOp::Eq(_)) => true,
+ (BinOp::Lt(_), BinOp::Lt(_)) => true,
+ (BinOp::Le(_), BinOp::Le(_)) => true,
+ (BinOp::Ne(_), BinOp::Ne(_)) => true,
+ (BinOp::Ge(_), BinOp::Ge(_)) => true,
+ (BinOp::Gt(_), BinOp::Gt(_)) => true,
+ (BinOp::AddEq(_), BinOp::AddEq(_)) => true,
+ (BinOp::SubEq(_), BinOp::SubEq(_)) => true,
+ (BinOp::MulEq(_), BinOp::MulEq(_)) => true,
+ (BinOp::DivEq(_), BinOp::DivEq(_)) => true,
+ (BinOp::RemEq(_), BinOp::RemEq(_)) => true,
+ (BinOp::BitXorEq(_), BinOp::BitXorEq(_)) => true,
+ (BinOp::BitAndEq(_), BinOp::BitAndEq(_)) => true,
+ (BinOp::BitOrEq(_), BinOp::BitOrEq(_)) => true,
+ (BinOp::ShlEq(_), BinOp::ShlEq(_)) => true,
+ (BinOp::ShrEq(_), BinOp::ShrEq(_)) => true,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Binding {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Binding {
+ fn eq(&self, other: &Self) -> bool {
+ self.ident == other.ident && self.ty == other.ty
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Block {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Block {
+ fn eq(&self, other: &Self) -> bool {
+ self.stmts == other.stmts
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for BoundLifetimes {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for BoundLifetimes {
+ fn eq(&self, other: &Self) -> bool {
+ self.lifetimes == other.lifetimes
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ConstParam {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ConstParam {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.ident == other.ident && self.ty == other.ty
+ && self.eq_token == other.eq_token && self.default == other.default
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Constraint {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Constraint {
+ fn eq(&self, other: &Self) -> bool {
+ self.ident == other.ident && self.bounds == other.bounds
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Data {}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Data {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (Data::Struct(self0), Data::Struct(other0)) => self0 == other0,
+ (Data::Enum(self0), Data::Enum(other0)) => self0 == other0,
+ (Data::Union(self0), Data::Union(other0)) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for DataEnum {}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for DataEnum {
+ fn eq(&self, other: &Self) -> bool {
+ self.variants == other.variants
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for DataStruct {}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for DataStruct {
+ fn eq(&self, other: &Self) -> bool {
+ self.fields == other.fields && self.semi_token == other.semi_token
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for DataUnion {}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for DataUnion {
+ fn eq(&self, other: &Self) -> bool {
+ self.fields == other.fields
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for DeriveInput {}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for DeriveInput {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && self.generics == other.generics && self.data == other.data
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Expr {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Expr {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ #[cfg(feature = "full")]
+ (Expr::Array(self0), Expr::Array(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Assign(self0), Expr::Assign(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::AssignOp(self0), Expr::AssignOp(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Async(self0), Expr::Async(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Await(self0), Expr::Await(other0)) => self0 == other0,
+ (Expr::Binary(self0), Expr::Binary(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Block(self0), Expr::Block(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Box(self0), Expr::Box(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Break(self0), Expr::Break(other0)) => self0 == other0,
+ (Expr::Call(self0), Expr::Call(other0)) => self0 == other0,
+ (Expr::Cast(self0), Expr::Cast(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Closure(self0), Expr::Closure(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Continue(self0), Expr::Continue(other0)) => self0 == other0,
+ (Expr::Field(self0), Expr::Field(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::ForLoop(self0), Expr::ForLoop(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Group(self0), Expr::Group(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::If(self0), Expr::If(other0)) => self0 == other0,
+ (Expr::Index(self0), Expr::Index(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Let(self0), Expr::Let(other0)) => self0 == other0,
+ (Expr::Lit(self0), Expr::Lit(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Loop(self0), Expr::Loop(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Macro(self0), Expr::Macro(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Match(self0), Expr::Match(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::MethodCall(self0), Expr::MethodCall(other0)) => self0 == other0,
+ (Expr::Paren(self0), Expr::Paren(other0)) => self0 == other0,
+ (Expr::Path(self0), Expr::Path(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Range(self0), Expr::Range(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Reference(self0), Expr::Reference(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Repeat(self0), Expr::Repeat(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Return(self0), Expr::Return(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Struct(self0), Expr::Struct(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Try(self0), Expr::Try(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::TryBlock(self0), Expr::TryBlock(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Tuple(self0), Expr::Tuple(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Type(self0), Expr::Type(other0)) => self0 == other0,
+ (Expr::Unary(self0), Expr::Unary(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Unsafe(self0), Expr::Unsafe(other0)) => self0 == other0,
+ (Expr::Verbatim(self0), Expr::Verbatim(other0)) => {
+ TokenStreamHelper(self0) == TokenStreamHelper(other0)
+ }
+ #[cfg(feature = "full")]
+ (Expr::While(self0), Expr::While(other0)) => self0 == other0,
+ #[cfg(feature = "full")]
+ (Expr::Yield(self0), Expr::Yield(other0)) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprArray {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprArray {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.elems == other.elems
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprAssign {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprAssign {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.left == other.left && self.right == other.right
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprAssignOp {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprAssignOp {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.left == other.left && self.op == other.op
+ && self.right == other.right
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprAsync {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprAsync {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.capture == other.capture
+ && self.block == other.block
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprAwait {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprAwait {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.base == other.base
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprBinary {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprBinary {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.left == other.left && self.op == other.op
+ && self.right == other.right
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprBlock {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprBlock {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.label == other.label
+ && self.block == other.block
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprBox {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprBox {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprBreak {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprBreak {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.label == other.label && self.expr == other.expr
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprCall {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprCall {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.func == other.func && self.args == other.args
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprCast {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprCast {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr && self.ty == other.ty
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprClosure {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprClosure {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.movability == other.movability
+ && self.asyncness == other.asyncness && self.capture == other.capture
+ && self.inputs == other.inputs && self.output == other.output
+ && self.body == other.body
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprContinue {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprContinue {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.label == other.label
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprField {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprField {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.base == other.base
+ && self.member == other.member
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprForLoop {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprForLoop {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.label == other.label && self.pat == other.pat
+ && self.expr == other.expr && self.body == other.body
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprGroup {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprGroup {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprIf {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprIf {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.cond == other.cond
+ && self.then_branch == other.then_branch
+ && self.else_branch == other.else_branch
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprIndex {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprIndex {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr && self.index == other.index
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprLet {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprLet {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.pat == other.pat && self.expr == other.expr
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprLit {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprLit {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.lit == other.lit
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprLoop {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprLoop {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.label == other.label && self.body == other.body
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprMacro {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprMacro {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.mac == other.mac
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprMatch {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprMatch {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr && self.arms == other.arms
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprMethodCall {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprMethodCall {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.receiver == other.receiver
+ && self.method == other.method && self.turbofish == other.turbofish
+ && self.args == other.args
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprParen {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprParen {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprPath {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprPath {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.qself == other.qself && self.path == other.path
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprRange {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprRange {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.from == other.from
+ && self.limits == other.limits && self.to == other.to
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprReference {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprReference {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.mutability == other.mutability
+ && self.expr == other.expr
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprRepeat {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprRepeat {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr && self.len == other.len
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprReturn {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprReturn {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprStruct {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprStruct {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.path == other.path
+ && self.fields == other.fields && self.dot2_token == other.dot2_token
+ && self.rest == other.rest
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprTry {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprTry {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprTryBlock {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprTryBlock {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.block == other.block
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprTuple {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprTuple {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.elems == other.elems
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprType {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprType {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr && self.ty == other.ty
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprUnary {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprUnary {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.op == other.op && self.expr == other.expr
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprUnsafe {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprUnsafe {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.block == other.block
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprWhile {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprWhile {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.label == other.label && self.cond == other.cond
+ && self.body == other.body
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ExprYield {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ExprYield {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Field {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Field {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && self.colon_token == other.colon_token && self.ty == other.ty
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for FieldPat {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for FieldPat {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.member == other.member
+ && self.colon_token == other.colon_token && self.pat == other.pat
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for FieldValue {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for FieldValue {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.member == other.member
+ && self.colon_token == other.colon_token && self.expr == other.expr
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Fields {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Fields {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (Fields::Named(self0), Fields::Named(other0)) => self0 == other0,
+ (Fields::Unnamed(self0), Fields::Unnamed(other0)) => self0 == other0,
+ (Fields::Unit, Fields::Unit) => true,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for FieldsNamed {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for FieldsNamed {
+ fn eq(&self, other: &Self) -> bool {
+ self.named == other.named
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for FieldsUnnamed {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for FieldsUnnamed {
+ fn eq(&self, other: &Self) -> bool {
+ self.unnamed == other.unnamed
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for File {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for File {
+ fn eq(&self, other: &Self) -> bool {
+ self.shebang == other.shebang && self.attrs == other.attrs
+ && self.items == other.items
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for FnArg {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for FnArg {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (FnArg::Receiver(self0), FnArg::Receiver(other0)) => self0 == other0,
+ (FnArg::Typed(self0), FnArg::Typed(other0)) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ForeignItem {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ForeignItem {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (ForeignItem::Fn(self0), ForeignItem::Fn(other0)) => self0 == other0,
+ (ForeignItem::Static(self0), ForeignItem::Static(other0)) => self0 == other0,
+ (ForeignItem::Type(self0), ForeignItem::Type(other0)) => self0 == other0,
+ (ForeignItem::Macro(self0), ForeignItem::Macro(other0)) => self0 == other0,
+ (ForeignItem::Verbatim(self0), ForeignItem::Verbatim(other0)) => {
+ TokenStreamHelper(self0) == TokenStreamHelper(other0)
+ }
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ForeignItemFn {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ForeignItemFn {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.sig == other.sig
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ForeignItemMacro {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ForeignItemMacro {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.mac == other.mac
+ && self.semi_token == other.semi_token
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ForeignItemStatic {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ForeignItemStatic {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis
+ && self.mutability == other.mutability && self.ident == other.ident
+ && self.ty == other.ty
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ForeignItemType {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ForeignItemType {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for GenericArgument {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for GenericArgument {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (GenericArgument::Lifetime(self0), GenericArgument::Lifetime(other0)) => {
+ self0 == other0
+ }
+ (GenericArgument::Type(self0), GenericArgument::Type(other0)) => {
+ self0 == other0
+ }
+ (GenericArgument::Const(self0), GenericArgument::Const(other0)) => {
+ self0 == other0
+ }
+ (GenericArgument::Binding(self0), GenericArgument::Binding(other0)) => {
+ self0 == other0
+ }
+ (GenericArgument::Constraint(self0), GenericArgument::Constraint(other0)) => {
+ self0 == other0
+ }
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for GenericMethodArgument {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for GenericMethodArgument {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (GenericMethodArgument::Type(self0), GenericMethodArgument::Type(other0)) => {
+ self0 == other0
+ }
+ (
+ GenericMethodArgument::Const(self0),
+ GenericMethodArgument::Const(other0),
+ ) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for GenericParam {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for GenericParam {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (GenericParam::Type(self0), GenericParam::Type(other0)) => self0 == other0,
+ (GenericParam::Lifetime(self0), GenericParam::Lifetime(other0)) => {
+ self0 == other0
+ }
+ (GenericParam::Const(self0), GenericParam::Const(other0)) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Generics {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Generics {
+ fn eq(&self, other: &Self) -> bool {
+ self.lt_token == other.lt_token && self.params == other.params
+ && self.gt_token == other.gt_token && self.where_clause == other.where_clause
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ImplItem {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ImplItem {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (ImplItem::Const(self0), ImplItem::Const(other0)) => self0 == other0,
+ (ImplItem::Method(self0), ImplItem::Method(other0)) => self0 == other0,
+ (ImplItem::Type(self0), ImplItem::Type(other0)) => self0 == other0,
+ (ImplItem::Macro(self0), ImplItem::Macro(other0)) => self0 == other0,
+ (ImplItem::Verbatim(self0), ImplItem::Verbatim(other0)) => {
+ TokenStreamHelper(self0) == TokenStreamHelper(other0)
+ }
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ImplItemConst {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ImplItemConst {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis
+ && self.defaultness == other.defaultness && self.ident == other.ident
+ && self.ty == other.ty && self.expr == other.expr
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ImplItemMacro {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ImplItemMacro {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.mac == other.mac
+ && self.semi_token == other.semi_token
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ImplItemMethod {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ImplItemMethod {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis
+ && self.defaultness == other.defaultness && self.sig == other.sig
+ && self.block == other.block
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ImplItemType {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ImplItemType {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis
+ && self.defaultness == other.defaultness && self.ident == other.ident
+ && self.generics == other.generics && self.ty == other.ty
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Item {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Item {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (Item::Const(self0), Item::Const(other0)) => self0 == other0,
+ (Item::Enum(self0), Item::Enum(other0)) => self0 == other0,
+ (Item::ExternCrate(self0), Item::ExternCrate(other0)) => self0 == other0,
+ (Item::Fn(self0), Item::Fn(other0)) => self0 == other0,
+ (Item::ForeignMod(self0), Item::ForeignMod(other0)) => self0 == other0,
+ (Item::Impl(self0), Item::Impl(other0)) => self0 == other0,
+ (Item::Macro(self0), Item::Macro(other0)) => self0 == other0,
+ (Item::Macro2(self0), Item::Macro2(other0)) => self0 == other0,
+ (Item::Mod(self0), Item::Mod(other0)) => self0 == other0,
+ (Item::Static(self0), Item::Static(other0)) => self0 == other0,
+ (Item::Struct(self0), Item::Struct(other0)) => self0 == other0,
+ (Item::Trait(self0), Item::Trait(other0)) => self0 == other0,
+ (Item::TraitAlias(self0), Item::TraitAlias(other0)) => self0 == other0,
+ (Item::Type(self0), Item::Type(other0)) => self0 == other0,
+ (Item::Union(self0), Item::Union(other0)) => self0 == other0,
+ (Item::Use(self0), Item::Use(other0)) => self0 == other0,
+ (Item::Verbatim(self0), Item::Verbatim(other0)) => {
+ TokenStreamHelper(self0) == TokenStreamHelper(other0)
+ }
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemConst {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemConst {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && self.ty == other.ty && self.expr == other.expr
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemEnum {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemEnum {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && self.generics == other.generics && self.variants == other.variants
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemExternCrate {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemExternCrate {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && self.rename == other.rename
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemFn {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemFn {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.sig == other.sig
+ && self.block == other.block
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemForeignMod {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemForeignMod {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.abi == other.abi && self.items == other.items
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemImpl {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemImpl {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.defaultness == other.defaultness
+ && self.unsafety == other.unsafety && self.generics == other.generics
+ && self.trait_ == other.trait_ && self.self_ty == other.self_ty
+ && self.items == other.items
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemMacro {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemMacro {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.ident == other.ident && self.mac == other.mac
+ && self.semi_token == other.semi_token
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemMacro2 {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemMacro2 {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && TokenStreamHelper(&self.rules) == TokenStreamHelper(&other.rules)
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemMod {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemMod {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && self.content == other.content && self.semi == other.semi
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemStatic {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemStatic {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis
+ && self.mutability == other.mutability && self.ident == other.ident
+ && self.ty == other.ty && self.expr == other.expr
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemStruct {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemStruct {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && self.generics == other.generics && self.fields == other.fields
+ && self.semi_token == other.semi_token
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemTrait {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemTrait {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis
+ && self.unsafety == other.unsafety && self.auto_token == other.auto_token
+ && self.ident == other.ident && self.generics == other.generics
+ && self.colon_token == other.colon_token
+ && self.supertraits == other.supertraits && self.items == other.items
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemTraitAlias {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemTraitAlias {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && self.generics == other.generics && self.bounds == other.bounds
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemType {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemType {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && self.generics == other.generics && self.ty == other.ty
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemUnion {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemUnion {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis && self.ident == other.ident
+ && self.generics == other.generics && self.fields == other.fields
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ItemUse {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ItemUse {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.vis == other.vis
+ && self.leading_colon == other.leading_colon && self.tree == other.tree
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Label {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Label {
+ fn eq(&self, other: &Self) -> bool {
+ self.name == other.name
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for LifetimeDef {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for LifetimeDef {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.lifetime == other.lifetime
+ && self.colon_token == other.colon_token && self.bounds == other.bounds
+ }
+}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Lit {}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Lit {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (Lit::Str(self0), Lit::Str(other0)) => self0 == other0,
+ (Lit::ByteStr(self0), Lit::ByteStr(other0)) => self0 == other0,
+ (Lit::Byte(self0), Lit::Byte(other0)) => self0 == other0,
+ (Lit::Char(self0), Lit::Char(other0)) => self0 == other0,
+ (Lit::Int(self0), Lit::Int(other0)) => self0 == other0,
+ (Lit::Float(self0), Lit::Float(other0)) => self0 == other0,
+ (Lit::Bool(self0), Lit::Bool(other0)) => self0 == other0,
+ (Lit::Verbatim(self0), Lit::Verbatim(other0)) => {
+ self0.to_string() == other0.to_string()
+ }
+ _ => false,
+ }
+ }
+}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for LitBool {}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for LitBool {
+ fn eq(&self, other: &Self) -> bool {
+ self.value == other.value
+ }
+}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for LitByte {}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for LitByteStr {}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for LitChar {}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for LitFloat {}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for LitInt {}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for LitStr {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Local {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Local {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.pat == other.pat && self.init == other.init
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Macro {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Macro {
+ fn eq(&self, other: &Self) -> bool {
+ self.path == other.path && self.delimiter == other.delimiter
+ && TokenStreamHelper(&self.tokens) == TokenStreamHelper(&other.tokens)
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for MacroDelimiter {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for MacroDelimiter {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (MacroDelimiter::Paren(_), MacroDelimiter::Paren(_)) => true,
+ (MacroDelimiter::Brace(_), MacroDelimiter::Brace(_)) => true,
+ (MacroDelimiter::Bracket(_), MacroDelimiter::Bracket(_)) => true,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Meta {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Meta {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (Meta::Path(self0), Meta::Path(other0)) => self0 == other0,
+ (Meta::List(self0), Meta::List(other0)) => self0 == other0,
+ (Meta::NameValue(self0), Meta::NameValue(other0)) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for MetaList {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for MetaList {
+ fn eq(&self, other: &Self) -> bool {
+ self.path == other.path && self.nested == other.nested
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for MetaNameValue {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for MetaNameValue {
+ fn eq(&self, other: &Self) -> bool {
+ self.path == other.path && self.lit == other.lit
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for MethodTurbofish {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for MethodTurbofish {
+ fn eq(&self, other: &Self) -> bool {
+ self.args == other.args
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for NestedMeta {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for NestedMeta {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (NestedMeta::Meta(self0), NestedMeta::Meta(other0)) => self0 == other0,
+ (NestedMeta::Lit(self0), NestedMeta::Lit(other0)) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ParenthesizedGenericArguments {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ParenthesizedGenericArguments {
+ fn eq(&self, other: &Self) -> bool {
+ self.inputs == other.inputs && self.output == other.output
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Pat {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Pat {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (Pat::Box(self0), Pat::Box(other0)) => self0 == other0,
+ (Pat::Ident(self0), Pat::Ident(other0)) => self0 == other0,
+ (Pat::Lit(self0), Pat::Lit(other0)) => self0 == other0,
+ (Pat::Macro(self0), Pat::Macro(other0)) => self0 == other0,
+ (Pat::Or(self0), Pat::Or(other0)) => self0 == other0,
+ (Pat::Path(self0), Pat::Path(other0)) => self0 == other0,
+ (Pat::Range(self0), Pat::Range(other0)) => self0 == other0,
+ (Pat::Reference(self0), Pat::Reference(other0)) => self0 == other0,
+ (Pat::Rest(self0), Pat::Rest(other0)) => self0 == other0,
+ (Pat::Slice(self0), Pat::Slice(other0)) => self0 == other0,
+ (Pat::Struct(self0), Pat::Struct(other0)) => self0 == other0,
+ (Pat::Tuple(self0), Pat::Tuple(other0)) => self0 == other0,
+ (Pat::TupleStruct(self0), Pat::TupleStruct(other0)) => self0 == other0,
+ (Pat::Type(self0), Pat::Type(other0)) => self0 == other0,
+ (Pat::Verbatim(self0), Pat::Verbatim(other0)) => {
+ TokenStreamHelper(self0) == TokenStreamHelper(other0)
+ }
+ (Pat::Wild(self0), Pat::Wild(other0)) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatBox {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatBox {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.pat == other.pat
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatIdent {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatIdent {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.by_ref == other.by_ref
+ && self.mutability == other.mutability && self.ident == other.ident
+ && self.subpat == other.subpat
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatLit {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatLit {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.expr == other.expr
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatMacro {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatMacro {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.mac == other.mac
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatOr {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatOr {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.leading_vert == other.leading_vert
+ && self.cases == other.cases
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatPath {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatPath {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.qself == other.qself && self.path == other.path
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatRange {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatRange {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.lo == other.lo && self.limits == other.limits
+ && self.hi == other.hi
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatReference {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatReference {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.mutability == other.mutability
+ && self.pat == other.pat
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatRest {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatRest {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatSlice {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatSlice {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.elems == other.elems
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatStruct {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatStruct {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.path == other.path
+ && self.fields == other.fields && self.dot2_token == other.dot2_token
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatTuple {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatTuple {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.elems == other.elems
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatTupleStruct {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatTupleStruct {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.path == other.path && self.pat == other.pat
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatType {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatType {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.pat == other.pat && self.ty == other.ty
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PatWild {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PatWild {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Path {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Path {
+ fn eq(&self, other: &Self) -> bool {
+ self.leading_colon == other.leading_colon && self.segments == other.segments
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PathArguments {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PathArguments {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (PathArguments::None, PathArguments::None) => true,
+ (
+ PathArguments::AngleBracketed(self0),
+ PathArguments::AngleBracketed(other0),
+ ) => self0 == other0,
+ (
+ PathArguments::Parenthesized(self0),
+ PathArguments::Parenthesized(other0),
+ ) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PathSegment {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PathSegment {
+ fn eq(&self, other: &Self) -> bool {
+ self.ident == other.ident && self.arguments == other.arguments
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PredicateEq {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PredicateEq {
+ fn eq(&self, other: &Self) -> bool {
+ self.lhs_ty == other.lhs_ty && self.rhs_ty == other.rhs_ty
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PredicateLifetime {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PredicateLifetime {
+ fn eq(&self, other: &Self) -> bool {
+ self.lifetime == other.lifetime && self.bounds == other.bounds
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for PredicateType {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for PredicateType {
+ fn eq(&self, other: &Self) -> bool {
+ self.lifetimes == other.lifetimes && self.bounded_ty == other.bounded_ty
+ && self.bounds == other.bounds
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for QSelf {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for QSelf {
+ fn eq(&self, other: &Self) -> bool {
+ self.ty == other.ty && self.position == other.position
+ && self.as_token == other.as_token
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for RangeLimits {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for RangeLimits {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (RangeLimits::HalfOpen(_), RangeLimits::HalfOpen(_)) => true,
+ (RangeLimits::Closed(_), RangeLimits::Closed(_)) => true,
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Receiver {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Receiver {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.reference == other.reference
+ && self.mutability == other.mutability
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for ReturnType {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for ReturnType {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (ReturnType::Default, ReturnType::Default) => true,
+ (ReturnType::Type(_, self1), ReturnType::Type(_, other1)) => self1 == other1,
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Signature {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Signature {
+ fn eq(&self, other: &Self) -> bool {
+ self.constness == other.constness && self.asyncness == other.asyncness
+ && self.unsafety == other.unsafety && self.abi == other.abi
+ && self.ident == other.ident && self.generics == other.generics
+ && self.inputs == other.inputs && self.variadic == other.variadic
+ && self.output == other.output
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Stmt {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Stmt {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (Stmt::Local(self0), Stmt::Local(other0)) => self0 == other0,
+ (Stmt::Item(self0), Stmt::Item(other0)) => self0 == other0,
+ (Stmt::Expr(self0), Stmt::Expr(other0)) => self0 == other0,
+ (Stmt::Semi(self0, _), Stmt::Semi(other0, _)) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TraitBound {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TraitBound {
+ fn eq(&self, other: &Self) -> bool {
+ self.paren_token == other.paren_token && self.modifier == other.modifier
+ && self.lifetimes == other.lifetimes && self.path == other.path
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TraitBoundModifier {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TraitBoundModifier {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (TraitBoundModifier::None, TraitBoundModifier::None) => true,
+ (TraitBoundModifier::Maybe(_), TraitBoundModifier::Maybe(_)) => true,
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TraitItem {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TraitItem {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (TraitItem::Const(self0), TraitItem::Const(other0)) => self0 == other0,
+ (TraitItem::Method(self0), TraitItem::Method(other0)) => self0 == other0,
+ (TraitItem::Type(self0), TraitItem::Type(other0)) => self0 == other0,
+ (TraitItem::Macro(self0), TraitItem::Macro(other0)) => self0 == other0,
+ (TraitItem::Verbatim(self0), TraitItem::Verbatim(other0)) => {
+ TokenStreamHelper(self0) == TokenStreamHelper(other0)
+ }
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TraitItemConst {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TraitItemConst {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.ident == other.ident && self.ty == other.ty
+ && self.default == other.default
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TraitItemMacro {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TraitItemMacro {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.mac == other.mac
+ && self.semi_token == other.semi_token
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TraitItemMethod {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TraitItemMethod {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.sig == other.sig
+ && self.default == other.default && self.semi_token == other.semi_token
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TraitItemType {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TraitItemType {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.ident == other.ident
+ && self.generics == other.generics && self.colon_token == other.colon_token
+ && self.bounds == other.bounds && self.default == other.default
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Type {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Type {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (Type::Array(self0), Type::Array(other0)) => self0 == other0,
+ (Type::BareFn(self0), Type::BareFn(other0)) => self0 == other0,
+ (Type::Group(self0), Type::Group(other0)) => self0 == other0,
+ (Type::ImplTrait(self0), Type::ImplTrait(other0)) => self0 == other0,
+ (Type::Infer(self0), Type::Infer(other0)) => self0 == other0,
+ (Type::Macro(self0), Type::Macro(other0)) => self0 == other0,
+ (Type::Never(self0), Type::Never(other0)) => self0 == other0,
+ (Type::Paren(self0), Type::Paren(other0)) => self0 == other0,
+ (Type::Path(self0), Type::Path(other0)) => self0 == other0,
+ (Type::Ptr(self0), Type::Ptr(other0)) => self0 == other0,
+ (Type::Reference(self0), Type::Reference(other0)) => self0 == other0,
+ (Type::Slice(self0), Type::Slice(other0)) => self0 == other0,
+ (Type::TraitObject(self0), Type::TraitObject(other0)) => self0 == other0,
+ (Type::Tuple(self0), Type::Tuple(other0)) => self0 == other0,
+ (Type::Verbatim(self0), Type::Verbatim(other0)) => {
+ TokenStreamHelper(self0) == TokenStreamHelper(other0)
+ }
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeArray {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeArray {
+ fn eq(&self, other: &Self) -> bool {
+ self.elem == other.elem && self.len == other.len
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeBareFn {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeBareFn {
+ fn eq(&self, other: &Self) -> bool {
+ self.lifetimes == other.lifetimes && self.unsafety == other.unsafety
+ && self.abi == other.abi && self.inputs == other.inputs
+ && self.variadic == other.variadic && self.output == other.output
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeGroup {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeGroup {
+ fn eq(&self, other: &Self) -> bool {
+ self.elem == other.elem
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeImplTrait {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeImplTrait {
+ fn eq(&self, other: &Self) -> bool {
+ self.bounds == other.bounds
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeInfer {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeInfer {
+ fn eq(&self, _other: &Self) -> bool {
+ true
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeMacro {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeMacro {
+ fn eq(&self, other: &Self) -> bool {
+ self.mac == other.mac
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeNever {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeNever {
+ fn eq(&self, _other: &Self) -> bool {
+ true
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeParam {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeParam {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.ident == other.ident
+ && self.colon_token == other.colon_token && self.bounds == other.bounds
+ && self.eq_token == other.eq_token && self.default == other.default
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeParamBound {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeParamBound {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (TypeParamBound::Trait(self0), TypeParamBound::Trait(other0)) => {
+ self0 == other0
+ }
+ (TypeParamBound::Lifetime(self0), TypeParamBound::Lifetime(other0)) => {
+ self0 == other0
+ }
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeParen {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeParen {
+ fn eq(&self, other: &Self) -> bool {
+ self.elem == other.elem
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypePath {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypePath {
+ fn eq(&self, other: &Self) -> bool {
+ self.qself == other.qself && self.path == other.path
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypePtr {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypePtr {
+ fn eq(&self, other: &Self) -> bool {
+ self.const_token == other.const_token && self.mutability == other.mutability
+ && self.elem == other.elem
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeReference {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeReference {
+ fn eq(&self, other: &Self) -> bool {
+ self.lifetime == other.lifetime && self.mutability == other.mutability
+ && self.elem == other.elem
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeSlice {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeSlice {
+ fn eq(&self, other: &Self) -> bool {
+ self.elem == other.elem
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeTraitObject {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeTraitObject {
+ fn eq(&self, other: &Self) -> bool {
+ self.dyn_token == other.dyn_token && self.bounds == other.bounds
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for TypeTuple {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for TypeTuple {
+ fn eq(&self, other: &Self) -> bool {
+ self.elems == other.elems
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for UnOp {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for UnOp {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (UnOp::Deref(_), UnOp::Deref(_)) => true,
+ (UnOp::Not(_), UnOp::Not(_)) => true,
+ (UnOp::Neg(_), UnOp::Neg(_)) => true,
+ _ => false,
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for UseGlob {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for UseGlob {
+ fn eq(&self, _other: &Self) -> bool {
+ true
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for UseGroup {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for UseGroup {
+ fn eq(&self, other: &Self) -> bool {
+ self.items == other.items
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for UseName {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for UseName {
+ fn eq(&self, other: &Self) -> bool {
+ self.ident == other.ident
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for UsePath {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for UsePath {
+ fn eq(&self, other: &Self) -> bool {
+ self.ident == other.ident && self.tree == other.tree
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for UseRename {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for UseRename {
+ fn eq(&self, other: &Self) -> bool {
+ self.ident == other.ident && self.rename == other.rename
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for UseTree {}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for UseTree {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (UseTree::Path(self0), UseTree::Path(other0)) => self0 == other0,
+ (UseTree::Name(self0), UseTree::Name(other0)) => self0 == other0,
+ (UseTree::Rename(self0), UseTree::Rename(other0)) => self0 == other0,
+ (UseTree::Glob(self0), UseTree::Glob(other0)) => self0 == other0,
+ (UseTree::Group(self0), UseTree::Group(other0)) => self0 == other0,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Variadic {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Variadic {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Variant {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Variant {
+ fn eq(&self, other: &Self) -> bool {
+ self.attrs == other.attrs && self.ident == other.ident
+ && self.fields == other.fields && self.discriminant == other.discriminant
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for VisCrate {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for VisCrate {
+ fn eq(&self, _other: &Self) -> bool {
+ true
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for VisPublic {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for VisPublic {
+ fn eq(&self, _other: &Self) -> bool {
+ true
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for VisRestricted {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for VisRestricted {
+ fn eq(&self, other: &Self) -> bool {
+ self.in_token == other.in_token && self.path == other.path
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Visibility {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Visibility {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (Visibility::Public(self0), Visibility::Public(other0)) => self0 == other0,
+ (Visibility::Crate(self0), Visibility::Crate(other0)) => self0 == other0,
+ (Visibility::Restricted(self0), Visibility::Restricted(other0)) => {
+ self0 == other0
+ }
+ (Visibility::Inherited, Visibility::Inherited) => true,
+ _ => false,
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for WhereClause {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for WhereClause {
+ fn eq(&self, other: &Self) -> bool {
+ self.predicates == other.predicates
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for WherePredicate {}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for WherePredicate {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (WherePredicate::Type(self0), WherePredicate::Type(other0)) => {
+ self0 == other0
+ }
+ (WherePredicate::Lifetime(self0), WherePredicate::Lifetime(other0)) => {
+ self0 == other0
+ }
+ (WherePredicate::Eq(self0), WherePredicate::Eq(other0)) => self0 == other0,
+ _ => false,
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/gen/fold.rs b/third_party/rust/syn/src/gen/fold.rs
new file mode 100644
index 0000000000..98bb5794aa
--- /dev/null
+++ b/third_party/rust/syn/src/gen/fold.rs
@@ -0,0 +1,3341 @@
+// This file is @generated by syn-internal-codegen.
+// It is not intended for manual editing.
+
+#![allow(unreachable_code, unused_variables)]
+#![allow(clippy::match_wildcard_for_single_variants)]
+#[cfg(any(feature = "full", feature = "derive"))]
+use crate::gen::helper::fold::*;
+#[cfg(any(feature = "full", feature = "derive"))]
+use crate::token::{Brace, Bracket, Group, Paren};
+use crate::*;
+use proc_macro2::Span;
+#[cfg(feature = "full")]
+macro_rules! full {
+ ($e:expr) => {
+ $e
+ };
+}
+#[cfg(all(feature = "derive", not(feature = "full")))]
+macro_rules! full {
+ ($e:expr) => {
+ unreachable!()
+ };
+}
+/// Syntax tree traversal to transform the nodes of an owned syntax tree.
+///
+/// See the [module documentation] for details.
+///
+/// [module documentation]: self
+///
+/// *This trait is available only if Syn is built with the `"fold"` feature.*
+pub trait Fold {
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_abi(&mut self, i: Abi) -> Abi {
+ fold_abi(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_angle_bracketed_generic_arguments(
+ &mut self,
+ i: AngleBracketedGenericArguments,
+ ) -> AngleBracketedGenericArguments {
+ fold_angle_bracketed_generic_arguments(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_arm(&mut self, i: Arm) -> Arm {
+ fold_arm(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_attr_style(&mut self, i: AttrStyle) -> AttrStyle {
+ fold_attr_style(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_attribute(&mut self, i: Attribute) -> Attribute {
+ fold_attribute(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_bare_fn_arg(&mut self, i: BareFnArg) -> BareFnArg {
+ fold_bare_fn_arg(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_bin_op(&mut self, i: BinOp) -> BinOp {
+ fold_bin_op(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_binding(&mut self, i: Binding) -> Binding {
+ fold_binding(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_block(&mut self, i: Block) -> Block {
+ fold_block(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_bound_lifetimes(&mut self, i: BoundLifetimes) -> BoundLifetimes {
+ fold_bound_lifetimes(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_const_param(&mut self, i: ConstParam) -> ConstParam {
+ fold_const_param(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_constraint(&mut self, i: Constraint) -> Constraint {
+ fold_constraint(self, i)
+ }
+ #[cfg(feature = "derive")]
+ fn fold_data(&mut self, i: Data) -> Data {
+ fold_data(self, i)
+ }
+ #[cfg(feature = "derive")]
+ fn fold_data_enum(&mut self, i: DataEnum) -> DataEnum {
+ fold_data_enum(self, i)
+ }
+ #[cfg(feature = "derive")]
+ fn fold_data_struct(&mut self, i: DataStruct) -> DataStruct {
+ fold_data_struct(self, i)
+ }
+ #[cfg(feature = "derive")]
+ fn fold_data_union(&mut self, i: DataUnion) -> DataUnion {
+ fold_data_union(self, i)
+ }
+ #[cfg(feature = "derive")]
+ fn fold_derive_input(&mut self, i: DeriveInput) -> DeriveInput {
+ fold_derive_input(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_expr(&mut self, i: Expr) -> Expr {
+ fold_expr(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_array(&mut self, i: ExprArray) -> ExprArray {
+ fold_expr_array(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_assign(&mut self, i: ExprAssign) -> ExprAssign {
+ fold_expr_assign(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_assign_op(&mut self, i: ExprAssignOp) -> ExprAssignOp {
+ fold_expr_assign_op(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_async(&mut self, i: ExprAsync) -> ExprAsync {
+ fold_expr_async(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_await(&mut self, i: ExprAwait) -> ExprAwait {
+ fold_expr_await(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_expr_binary(&mut self, i: ExprBinary) -> ExprBinary {
+ fold_expr_binary(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_block(&mut self, i: ExprBlock) -> ExprBlock {
+ fold_expr_block(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_box(&mut self, i: ExprBox) -> ExprBox {
+ fold_expr_box(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_break(&mut self, i: ExprBreak) -> ExprBreak {
+ fold_expr_break(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_expr_call(&mut self, i: ExprCall) -> ExprCall {
+ fold_expr_call(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_expr_cast(&mut self, i: ExprCast) -> ExprCast {
+ fold_expr_cast(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_closure(&mut self, i: ExprClosure) -> ExprClosure {
+ fold_expr_closure(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_continue(&mut self, i: ExprContinue) -> ExprContinue {
+ fold_expr_continue(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_expr_field(&mut self, i: ExprField) -> ExprField {
+ fold_expr_field(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_for_loop(&mut self, i: ExprForLoop) -> ExprForLoop {
+ fold_expr_for_loop(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_group(&mut self, i: ExprGroup) -> ExprGroup {
+ fold_expr_group(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_if(&mut self, i: ExprIf) -> ExprIf {
+ fold_expr_if(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_expr_index(&mut self, i: ExprIndex) -> ExprIndex {
+ fold_expr_index(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_let(&mut self, i: ExprLet) -> ExprLet {
+ fold_expr_let(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_expr_lit(&mut self, i: ExprLit) -> ExprLit {
+ fold_expr_lit(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_loop(&mut self, i: ExprLoop) -> ExprLoop {
+ fold_expr_loop(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_macro(&mut self, i: ExprMacro) -> ExprMacro {
+ fold_expr_macro(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_match(&mut self, i: ExprMatch) -> ExprMatch {
+ fold_expr_match(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_method_call(&mut self, i: ExprMethodCall) -> ExprMethodCall {
+ fold_expr_method_call(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_expr_paren(&mut self, i: ExprParen) -> ExprParen {
+ fold_expr_paren(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_expr_path(&mut self, i: ExprPath) -> ExprPath {
+ fold_expr_path(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_range(&mut self, i: ExprRange) -> ExprRange {
+ fold_expr_range(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_reference(&mut self, i: ExprReference) -> ExprReference {
+ fold_expr_reference(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_repeat(&mut self, i: ExprRepeat) -> ExprRepeat {
+ fold_expr_repeat(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_return(&mut self, i: ExprReturn) -> ExprReturn {
+ fold_expr_return(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_struct(&mut self, i: ExprStruct) -> ExprStruct {
+ fold_expr_struct(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_try(&mut self, i: ExprTry) -> ExprTry {
+ fold_expr_try(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_try_block(&mut self, i: ExprTryBlock) -> ExprTryBlock {
+ fold_expr_try_block(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_tuple(&mut self, i: ExprTuple) -> ExprTuple {
+ fold_expr_tuple(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_type(&mut self, i: ExprType) -> ExprType {
+ fold_expr_type(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_expr_unary(&mut self, i: ExprUnary) -> ExprUnary {
+ fold_expr_unary(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_unsafe(&mut self, i: ExprUnsafe) -> ExprUnsafe {
+ fold_expr_unsafe(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_while(&mut self, i: ExprWhile) -> ExprWhile {
+ fold_expr_while(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_expr_yield(&mut self, i: ExprYield) -> ExprYield {
+ fold_expr_yield(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_field(&mut self, i: Field) -> Field {
+ fold_field(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_field_pat(&mut self, i: FieldPat) -> FieldPat {
+ fold_field_pat(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_field_value(&mut self, i: FieldValue) -> FieldValue {
+ fold_field_value(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_fields(&mut self, i: Fields) -> Fields {
+ fold_fields(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_fields_named(&mut self, i: FieldsNamed) -> FieldsNamed {
+ fold_fields_named(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_fields_unnamed(&mut self, i: FieldsUnnamed) -> FieldsUnnamed {
+ fold_fields_unnamed(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_file(&mut self, i: File) -> File {
+ fold_file(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_fn_arg(&mut self, i: FnArg) -> FnArg {
+ fold_fn_arg(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_foreign_item(&mut self, i: ForeignItem) -> ForeignItem {
+ fold_foreign_item(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_foreign_item_fn(&mut self, i: ForeignItemFn) -> ForeignItemFn {
+ fold_foreign_item_fn(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_foreign_item_macro(&mut self, i: ForeignItemMacro) -> ForeignItemMacro {
+ fold_foreign_item_macro(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_foreign_item_static(&mut self, i: ForeignItemStatic) -> ForeignItemStatic {
+ fold_foreign_item_static(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_foreign_item_type(&mut self, i: ForeignItemType) -> ForeignItemType {
+ fold_foreign_item_type(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_generic_argument(&mut self, i: GenericArgument) -> GenericArgument {
+ fold_generic_argument(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_generic_method_argument(
+ &mut self,
+ i: GenericMethodArgument,
+ ) -> GenericMethodArgument {
+ fold_generic_method_argument(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_generic_param(&mut self, i: GenericParam) -> GenericParam {
+ fold_generic_param(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_generics(&mut self, i: Generics) -> Generics {
+ fold_generics(self, i)
+ }
+ fn fold_ident(&mut self, i: Ident) -> Ident {
+ fold_ident(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_impl_item(&mut self, i: ImplItem) -> ImplItem {
+ fold_impl_item(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_impl_item_const(&mut self, i: ImplItemConst) -> ImplItemConst {
+ fold_impl_item_const(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_impl_item_macro(&mut self, i: ImplItemMacro) -> ImplItemMacro {
+ fold_impl_item_macro(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_impl_item_method(&mut self, i: ImplItemMethod) -> ImplItemMethod {
+ fold_impl_item_method(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_impl_item_type(&mut self, i: ImplItemType) -> ImplItemType {
+ fold_impl_item_type(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_index(&mut self, i: Index) -> Index {
+ fold_index(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item(&mut self, i: Item) -> Item {
+ fold_item(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_const(&mut self, i: ItemConst) -> ItemConst {
+ fold_item_const(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_enum(&mut self, i: ItemEnum) -> ItemEnum {
+ fold_item_enum(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_extern_crate(&mut self, i: ItemExternCrate) -> ItemExternCrate {
+ fold_item_extern_crate(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_fn(&mut self, i: ItemFn) -> ItemFn {
+ fold_item_fn(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_foreign_mod(&mut self, i: ItemForeignMod) -> ItemForeignMod {
+ fold_item_foreign_mod(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_impl(&mut self, i: ItemImpl) -> ItemImpl {
+ fold_item_impl(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_macro(&mut self, i: ItemMacro) -> ItemMacro {
+ fold_item_macro(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_macro2(&mut self, i: ItemMacro2) -> ItemMacro2 {
+ fold_item_macro2(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_mod(&mut self, i: ItemMod) -> ItemMod {
+ fold_item_mod(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_static(&mut self, i: ItemStatic) -> ItemStatic {
+ fold_item_static(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_struct(&mut self, i: ItemStruct) -> ItemStruct {
+ fold_item_struct(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_trait(&mut self, i: ItemTrait) -> ItemTrait {
+ fold_item_trait(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_trait_alias(&mut self, i: ItemTraitAlias) -> ItemTraitAlias {
+ fold_item_trait_alias(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_type(&mut self, i: ItemType) -> ItemType {
+ fold_item_type(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_union(&mut self, i: ItemUnion) -> ItemUnion {
+ fold_item_union(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_item_use(&mut self, i: ItemUse) -> ItemUse {
+ fold_item_use(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_label(&mut self, i: Label) -> Label {
+ fold_label(self, i)
+ }
+ fn fold_lifetime(&mut self, i: Lifetime) -> Lifetime {
+ fold_lifetime(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_lifetime_def(&mut self, i: LifetimeDef) -> LifetimeDef {
+ fold_lifetime_def(self, i)
+ }
+ fn fold_lit(&mut self, i: Lit) -> Lit {
+ fold_lit(self, i)
+ }
+ fn fold_lit_bool(&mut self, i: LitBool) -> LitBool {
+ fold_lit_bool(self, i)
+ }
+ fn fold_lit_byte(&mut self, i: LitByte) -> LitByte {
+ fold_lit_byte(self, i)
+ }
+ fn fold_lit_byte_str(&mut self, i: LitByteStr) -> LitByteStr {
+ fold_lit_byte_str(self, i)
+ }
+ fn fold_lit_char(&mut self, i: LitChar) -> LitChar {
+ fold_lit_char(self, i)
+ }
+ fn fold_lit_float(&mut self, i: LitFloat) -> LitFloat {
+ fold_lit_float(self, i)
+ }
+ fn fold_lit_int(&mut self, i: LitInt) -> LitInt {
+ fold_lit_int(self, i)
+ }
+ fn fold_lit_str(&mut self, i: LitStr) -> LitStr {
+ fold_lit_str(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_local(&mut self, i: Local) -> Local {
+ fold_local(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_macro(&mut self, i: Macro) -> Macro {
+ fold_macro(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_macro_delimiter(&mut self, i: MacroDelimiter) -> MacroDelimiter {
+ fold_macro_delimiter(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_member(&mut self, i: Member) -> Member {
+ fold_member(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_meta(&mut self, i: Meta) -> Meta {
+ fold_meta(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_meta_list(&mut self, i: MetaList) -> MetaList {
+ fold_meta_list(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_meta_name_value(&mut self, i: MetaNameValue) -> MetaNameValue {
+ fold_meta_name_value(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_method_turbofish(&mut self, i: MethodTurbofish) -> MethodTurbofish {
+ fold_method_turbofish(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_nested_meta(&mut self, i: NestedMeta) -> NestedMeta {
+ fold_nested_meta(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_parenthesized_generic_arguments(
+ &mut self,
+ i: ParenthesizedGenericArguments,
+ ) -> ParenthesizedGenericArguments {
+ fold_parenthesized_generic_arguments(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat(&mut self, i: Pat) -> Pat {
+ fold_pat(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_box(&mut self, i: PatBox) -> PatBox {
+ fold_pat_box(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_ident(&mut self, i: PatIdent) -> PatIdent {
+ fold_pat_ident(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_lit(&mut self, i: PatLit) -> PatLit {
+ fold_pat_lit(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_macro(&mut self, i: PatMacro) -> PatMacro {
+ fold_pat_macro(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_or(&mut self, i: PatOr) -> PatOr {
+ fold_pat_or(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_path(&mut self, i: PatPath) -> PatPath {
+ fold_pat_path(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_range(&mut self, i: PatRange) -> PatRange {
+ fold_pat_range(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_reference(&mut self, i: PatReference) -> PatReference {
+ fold_pat_reference(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_rest(&mut self, i: PatRest) -> PatRest {
+ fold_pat_rest(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_slice(&mut self, i: PatSlice) -> PatSlice {
+ fold_pat_slice(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_struct(&mut self, i: PatStruct) -> PatStruct {
+ fold_pat_struct(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_tuple(&mut self, i: PatTuple) -> PatTuple {
+ fold_pat_tuple(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_tuple_struct(&mut self, i: PatTupleStruct) -> PatTupleStruct {
+ fold_pat_tuple_struct(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_type(&mut self, i: PatType) -> PatType {
+ fold_pat_type(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_pat_wild(&mut self, i: PatWild) -> PatWild {
+ fold_pat_wild(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_path(&mut self, i: Path) -> Path {
+ fold_path(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_path_arguments(&mut self, i: PathArguments) -> PathArguments {
+ fold_path_arguments(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_path_segment(&mut self, i: PathSegment) -> PathSegment {
+ fold_path_segment(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_predicate_eq(&mut self, i: PredicateEq) -> PredicateEq {
+ fold_predicate_eq(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_predicate_lifetime(&mut self, i: PredicateLifetime) -> PredicateLifetime {
+ fold_predicate_lifetime(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_predicate_type(&mut self, i: PredicateType) -> PredicateType {
+ fold_predicate_type(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_qself(&mut self, i: QSelf) -> QSelf {
+ fold_qself(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_range_limits(&mut self, i: RangeLimits) -> RangeLimits {
+ fold_range_limits(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_receiver(&mut self, i: Receiver) -> Receiver {
+ fold_receiver(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_return_type(&mut self, i: ReturnType) -> ReturnType {
+ fold_return_type(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_signature(&mut self, i: Signature) -> Signature {
+ fold_signature(self, i)
+ }
+ fn fold_span(&mut self, i: Span) -> Span {
+ fold_span(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_stmt(&mut self, i: Stmt) -> Stmt {
+ fold_stmt(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_trait_bound(&mut self, i: TraitBound) -> TraitBound {
+ fold_trait_bound(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_trait_bound_modifier(
+ &mut self,
+ i: TraitBoundModifier,
+ ) -> TraitBoundModifier {
+ fold_trait_bound_modifier(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_trait_item(&mut self, i: TraitItem) -> TraitItem {
+ fold_trait_item(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_trait_item_const(&mut self, i: TraitItemConst) -> TraitItemConst {
+ fold_trait_item_const(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_trait_item_macro(&mut self, i: TraitItemMacro) -> TraitItemMacro {
+ fold_trait_item_macro(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_trait_item_method(&mut self, i: TraitItemMethod) -> TraitItemMethod {
+ fold_trait_item_method(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_trait_item_type(&mut self, i: TraitItemType) -> TraitItemType {
+ fold_trait_item_type(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type(&mut self, i: Type) -> Type {
+ fold_type(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_array(&mut self, i: TypeArray) -> TypeArray {
+ fold_type_array(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_bare_fn(&mut self, i: TypeBareFn) -> TypeBareFn {
+ fold_type_bare_fn(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_group(&mut self, i: TypeGroup) -> TypeGroup {
+ fold_type_group(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_impl_trait(&mut self, i: TypeImplTrait) -> TypeImplTrait {
+ fold_type_impl_trait(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_infer(&mut self, i: TypeInfer) -> TypeInfer {
+ fold_type_infer(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_macro(&mut self, i: TypeMacro) -> TypeMacro {
+ fold_type_macro(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_never(&mut self, i: TypeNever) -> TypeNever {
+ fold_type_never(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_param(&mut self, i: TypeParam) -> TypeParam {
+ fold_type_param(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_param_bound(&mut self, i: TypeParamBound) -> TypeParamBound {
+ fold_type_param_bound(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_paren(&mut self, i: TypeParen) -> TypeParen {
+ fold_type_paren(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_path(&mut self, i: TypePath) -> TypePath {
+ fold_type_path(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_ptr(&mut self, i: TypePtr) -> TypePtr {
+ fold_type_ptr(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_reference(&mut self, i: TypeReference) -> TypeReference {
+ fold_type_reference(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_slice(&mut self, i: TypeSlice) -> TypeSlice {
+ fold_type_slice(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_trait_object(&mut self, i: TypeTraitObject) -> TypeTraitObject {
+ fold_type_trait_object(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_type_tuple(&mut self, i: TypeTuple) -> TypeTuple {
+ fold_type_tuple(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_un_op(&mut self, i: UnOp) -> UnOp {
+ fold_un_op(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_use_glob(&mut self, i: UseGlob) -> UseGlob {
+ fold_use_glob(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_use_group(&mut self, i: UseGroup) -> UseGroup {
+ fold_use_group(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_use_name(&mut self, i: UseName) -> UseName {
+ fold_use_name(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_use_path(&mut self, i: UsePath) -> UsePath {
+ fold_use_path(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_use_rename(&mut self, i: UseRename) -> UseRename {
+ fold_use_rename(self, i)
+ }
+ #[cfg(feature = "full")]
+ fn fold_use_tree(&mut self, i: UseTree) -> UseTree {
+ fold_use_tree(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_variadic(&mut self, i: Variadic) -> Variadic {
+ fold_variadic(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_variant(&mut self, i: Variant) -> Variant {
+ fold_variant(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_vis_crate(&mut self, i: VisCrate) -> VisCrate {
+ fold_vis_crate(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_vis_public(&mut self, i: VisPublic) -> VisPublic {
+ fold_vis_public(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_vis_restricted(&mut self, i: VisRestricted) -> VisRestricted {
+ fold_vis_restricted(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_visibility(&mut self, i: Visibility) -> Visibility {
+ fold_visibility(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_where_clause(&mut self, i: WhereClause) -> WhereClause {
+ fold_where_clause(self, i)
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn fold_where_predicate(&mut self, i: WherePredicate) -> WherePredicate {
+ fold_where_predicate(self, i)
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_abi<F>(f: &mut F, node: Abi) -> Abi
+where
+ F: Fold + ?Sized,
+{
+ Abi {
+ extern_token: Token![extern](tokens_helper(f, &node.extern_token.span)),
+ name: (node.name).map(|it| f.fold_lit_str(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_angle_bracketed_generic_arguments<F>(
+ f: &mut F,
+ node: AngleBracketedGenericArguments,
+) -> AngleBracketedGenericArguments
+where
+ F: Fold + ?Sized,
+{
+ AngleBracketedGenericArguments {
+ colon2_token: (node.colon2_token)
+ .map(|it| Token![::](tokens_helper(f, &it.spans))),
+ lt_token: Token![<](tokens_helper(f, &node.lt_token.spans)),
+ args: FoldHelper::lift(node.args, |it| f.fold_generic_argument(it)),
+ gt_token: Token![>](tokens_helper(f, &node.gt_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_arm<F>(f: &mut F, node: Arm) -> Arm
+where
+ F: Fold + ?Sized,
+{
+ Arm {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ pat: f.fold_pat(node.pat),
+ guard: (node.guard)
+ .map(|it| (
+ Token![if](tokens_helper(f, &(it).0.span)),
+ Box::new(f.fold_expr(*(it).1)),
+ )),
+ fat_arrow_token: Token![=>](tokens_helper(f, &node.fat_arrow_token.spans)),
+ body: Box::new(f.fold_expr(*node.body)),
+ comma: (node.comma).map(|it| Token![,](tokens_helper(f, &it.spans))),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_attr_style<F>(f: &mut F, node: AttrStyle) -> AttrStyle
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ AttrStyle::Outer => AttrStyle::Outer,
+ AttrStyle::Inner(_binding_0) => {
+ AttrStyle::Inner(Token![!](tokens_helper(f, &_binding_0.spans)))
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_attribute<F>(f: &mut F, node: Attribute) -> Attribute
+where
+ F: Fold + ?Sized,
+{
+ Attribute {
+ pound_token: Token![#](tokens_helper(f, &node.pound_token.spans)),
+ style: f.fold_attr_style(node.style),
+ bracket_token: Bracket(tokens_helper(f, &node.bracket_token.span)),
+ path: f.fold_path(node.path),
+ tokens: node.tokens,
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_bare_fn_arg<F>(f: &mut F, node: BareFnArg) -> BareFnArg
+where
+ F: Fold + ?Sized,
+{
+ BareFnArg {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ name: (node.name)
+ .map(|it| (
+ f.fold_ident((it).0),
+ Token![:](tokens_helper(f, &(it).1.spans)),
+ )),
+ ty: f.fold_type(node.ty),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_bin_op<F>(f: &mut F, node: BinOp) -> BinOp
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ BinOp::Add(_binding_0) => {
+ BinOp::Add(Token![+](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Sub(_binding_0) => {
+ BinOp::Sub(Token![-](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Mul(_binding_0) => {
+ BinOp::Mul(Token![*](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Div(_binding_0) => {
+ BinOp::Div(Token![/](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Rem(_binding_0) => {
+ BinOp::Rem(Token![%](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::And(_binding_0) => {
+ BinOp::And(Token![&&](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Or(_binding_0) => {
+ BinOp::Or(Token![||](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::BitXor(_binding_0) => {
+ BinOp::BitXor(Token![^](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::BitAnd(_binding_0) => {
+ BinOp::BitAnd(Token![&](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::BitOr(_binding_0) => {
+ BinOp::BitOr(Token![|](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Shl(_binding_0) => {
+ BinOp::Shl(Token![<<](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Shr(_binding_0) => {
+ BinOp::Shr(Token![>>](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Eq(_binding_0) => {
+ BinOp::Eq(Token![==](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Lt(_binding_0) => {
+ BinOp::Lt(Token![<](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Le(_binding_0) => {
+ BinOp::Le(Token![<=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Ne(_binding_0) => {
+ BinOp::Ne(Token![!=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Ge(_binding_0) => {
+ BinOp::Ge(Token![>=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::Gt(_binding_0) => {
+ BinOp::Gt(Token![>](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::AddEq(_binding_0) => {
+ BinOp::AddEq(Token![+=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::SubEq(_binding_0) => {
+ BinOp::SubEq(Token![-=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::MulEq(_binding_0) => {
+ BinOp::MulEq(Token![*=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::DivEq(_binding_0) => {
+ BinOp::DivEq(Token![/=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::RemEq(_binding_0) => {
+ BinOp::RemEq(Token![%=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::BitXorEq(_binding_0) => {
+ BinOp::BitXorEq(Token![^=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::BitAndEq(_binding_0) => {
+ BinOp::BitAndEq(Token![&=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::BitOrEq(_binding_0) => {
+ BinOp::BitOrEq(Token![|=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::ShlEq(_binding_0) => {
+ BinOp::ShlEq(Token![<<=](tokens_helper(f, &_binding_0.spans)))
+ }
+ BinOp::ShrEq(_binding_0) => {
+ BinOp::ShrEq(Token![>>=](tokens_helper(f, &_binding_0.spans)))
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_binding<F>(f: &mut F, node: Binding) -> Binding
+where
+ F: Fold + ?Sized,
+{
+ Binding {
+ ident: f.fold_ident(node.ident),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ ty: f.fold_type(node.ty),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_block<F>(f: &mut F, node: Block) -> Block
+where
+ F: Fold + ?Sized,
+{
+ Block {
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ stmts: FoldHelper::lift(node.stmts, |it| f.fold_stmt(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_bound_lifetimes<F>(f: &mut F, node: BoundLifetimes) -> BoundLifetimes
+where
+ F: Fold + ?Sized,
+{
+ BoundLifetimes {
+ for_token: Token![for](tokens_helper(f, &node.for_token.span)),
+ lt_token: Token![<](tokens_helper(f, &node.lt_token.spans)),
+ lifetimes: FoldHelper::lift(node.lifetimes, |it| f.fold_lifetime_def(it)),
+ gt_token: Token![>](tokens_helper(f, &node.gt_token.spans)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_const_param<F>(f: &mut F, node: ConstParam) -> ConstParam
+where
+ F: Fold + ?Sized,
+{
+ ConstParam {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ const_token: Token![const](tokens_helper(f, &node.const_token.span)),
+ ident: f.fold_ident(node.ident),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ ty: f.fold_type(node.ty),
+ eq_token: (node.eq_token).map(|it| Token![=](tokens_helper(f, &it.spans))),
+ default: (node.default).map(|it| f.fold_expr(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_constraint<F>(f: &mut F, node: Constraint) -> Constraint
+where
+ F: Fold + ?Sized,
+{
+ Constraint {
+ ident: f.fold_ident(node.ident),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ bounds: FoldHelper::lift(node.bounds, |it| f.fold_type_param_bound(it)),
+ }
+}
+#[cfg(feature = "derive")]
+pub fn fold_data<F>(f: &mut F, node: Data) -> Data
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Data::Struct(_binding_0) => Data::Struct(f.fold_data_struct(_binding_0)),
+ Data::Enum(_binding_0) => Data::Enum(f.fold_data_enum(_binding_0)),
+ Data::Union(_binding_0) => Data::Union(f.fold_data_union(_binding_0)),
+ }
+}
+#[cfg(feature = "derive")]
+pub fn fold_data_enum<F>(f: &mut F, node: DataEnum) -> DataEnum
+where
+ F: Fold + ?Sized,
+{
+ DataEnum {
+ enum_token: Token![enum](tokens_helper(f, &node.enum_token.span)),
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ variants: FoldHelper::lift(node.variants, |it| f.fold_variant(it)),
+ }
+}
+#[cfg(feature = "derive")]
+pub fn fold_data_struct<F>(f: &mut F, node: DataStruct) -> DataStruct
+where
+ F: Fold + ?Sized,
+{
+ DataStruct {
+ struct_token: Token![struct](tokens_helper(f, &node.struct_token.span)),
+ fields: f.fold_fields(node.fields),
+ semi_token: (node.semi_token).map(|it| Token![;](tokens_helper(f, &it.spans))),
+ }
+}
+#[cfg(feature = "derive")]
+pub fn fold_data_union<F>(f: &mut F, node: DataUnion) -> DataUnion
+where
+ F: Fold + ?Sized,
+{
+ DataUnion {
+ union_token: Token![union](tokens_helper(f, &node.union_token.span)),
+ fields: f.fold_fields_named(node.fields),
+ }
+}
+#[cfg(feature = "derive")]
+pub fn fold_derive_input<F>(f: &mut F, node: DeriveInput) -> DeriveInput
+where
+ F: Fold + ?Sized,
+{
+ DeriveInput {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ ident: f.fold_ident(node.ident),
+ generics: f.fold_generics(node.generics),
+ data: f.fold_data(node.data),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_expr<F>(f: &mut F, node: Expr) -> Expr
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Expr::Array(_binding_0) => Expr::Array(full!(f.fold_expr_array(_binding_0))),
+ Expr::Assign(_binding_0) => Expr::Assign(full!(f.fold_expr_assign(_binding_0))),
+ Expr::AssignOp(_binding_0) => {
+ Expr::AssignOp(full!(f.fold_expr_assign_op(_binding_0)))
+ }
+ Expr::Async(_binding_0) => Expr::Async(full!(f.fold_expr_async(_binding_0))),
+ Expr::Await(_binding_0) => Expr::Await(full!(f.fold_expr_await(_binding_0))),
+ Expr::Binary(_binding_0) => Expr::Binary(f.fold_expr_binary(_binding_0)),
+ Expr::Block(_binding_0) => Expr::Block(full!(f.fold_expr_block(_binding_0))),
+ Expr::Box(_binding_0) => Expr::Box(full!(f.fold_expr_box(_binding_0))),
+ Expr::Break(_binding_0) => Expr::Break(full!(f.fold_expr_break(_binding_0))),
+ Expr::Call(_binding_0) => Expr::Call(f.fold_expr_call(_binding_0)),
+ Expr::Cast(_binding_0) => Expr::Cast(f.fold_expr_cast(_binding_0)),
+ Expr::Closure(_binding_0) => {
+ Expr::Closure(full!(f.fold_expr_closure(_binding_0)))
+ }
+ Expr::Continue(_binding_0) => {
+ Expr::Continue(full!(f.fold_expr_continue(_binding_0)))
+ }
+ Expr::Field(_binding_0) => Expr::Field(f.fold_expr_field(_binding_0)),
+ Expr::ForLoop(_binding_0) => {
+ Expr::ForLoop(full!(f.fold_expr_for_loop(_binding_0)))
+ }
+ Expr::Group(_binding_0) => Expr::Group(full!(f.fold_expr_group(_binding_0))),
+ Expr::If(_binding_0) => Expr::If(full!(f.fold_expr_if(_binding_0))),
+ Expr::Index(_binding_0) => Expr::Index(f.fold_expr_index(_binding_0)),
+ Expr::Let(_binding_0) => Expr::Let(full!(f.fold_expr_let(_binding_0))),
+ Expr::Lit(_binding_0) => Expr::Lit(f.fold_expr_lit(_binding_0)),
+ Expr::Loop(_binding_0) => Expr::Loop(full!(f.fold_expr_loop(_binding_0))),
+ Expr::Macro(_binding_0) => Expr::Macro(full!(f.fold_expr_macro(_binding_0))),
+ Expr::Match(_binding_0) => Expr::Match(full!(f.fold_expr_match(_binding_0))),
+ Expr::MethodCall(_binding_0) => {
+ Expr::MethodCall(full!(f.fold_expr_method_call(_binding_0)))
+ }
+ Expr::Paren(_binding_0) => Expr::Paren(f.fold_expr_paren(_binding_0)),
+ Expr::Path(_binding_0) => Expr::Path(f.fold_expr_path(_binding_0)),
+ Expr::Range(_binding_0) => Expr::Range(full!(f.fold_expr_range(_binding_0))),
+ Expr::Reference(_binding_0) => {
+ Expr::Reference(full!(f.fold_expr_reference(_binding_0)))
+ }
+ Expr::Repeat(_binding_0) => Expr::Repeat(full!(f.fold_expr_repeat(_binding_0))),
+ Expr::Return(_binding_0) => Expr::Return(full!(f.fold_expr_return(_binding_0))),
+ Expr::Struct(_binding_0) => Expr::Struct(full!(f.fold_expr_struct(_binding_0))),
+ Expr::Try(_binding_0) => Expr::Try(full!(f.fold_expr_try(_binding_0))),
+ Expr::TryBlock(_binding_0) => {
+ Expr::TryBlock(full!(f.fold_expr_try_block(_binding_0)))
+ }
+ Expr::Tuple(_binding_0) => Expr::Tuple(full!(f.fold_expr_tuple(_binding_0))),
+ Expr::Type(_binding_0) => Expr::Type(full!(f.fold_expr_type(_binding_0))),
+ Expr::Unary(_binding_0) => Expr::Unary(f.fold_expr_unary(_binding_0)),
+ Expr::Unsafe(_binding_0) => Expr::Unsafe(full!(f.fold_expr_unsafe(_binding_0))),
+ Expr::Verbatim(_binding_0) => Expr::Verbatim(_binding_0),
+ Expr::While(_binding_0) => Expr::While(full!(f.fold_expr_while(_binding_0))),
+ Expr::Yield(_binding_0) => Expr::Yield(full!(f.fold_expr_yield(_binding_0))),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_array<F>(f: &mut F, node: ExprArray) -> ExprArray
+where
+ F: Fold + ?Sized,
+{
+ ExprArray {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ bracket_token: Bracket(tokens_helper(f, &node.bracket_token.span)),
+ elems: FoldHelper::lift(node.elems, |it| f.fold_expr(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_assign<F>(f: &mut F, node: ExprAssign) -> ExprAssign
+where
+ F: Fold + ?Sized,
+{
+ ExprAssign {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ left: Box::new(f.fold_expr(*node.left)),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ right: Box::new(f.fold_expr(*node.right)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_assign_op<F>(f: &mut F, node: ExprAssignOp) -> ExprAssignOp
+where
+ F: Fold + ?Sized,
+{
+ ExprAssignOp {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ left: Box::new(f.fold_expr(*node.left)),
+ op: f.fold_bin_op(node.op),
+ right: Box::new(f.fold_expr(*node.right)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_async<F>(f: &mut F, node: ExprAsync) -> ExprAsync
+where
+ F: Fold + ?Sized,
+{
+ ExprAsync {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ async_token: Token![async](tokens_helper(f, &node.async_token.span)),
+ capture: (node.capture).map(|it| Token![move](tokens_helper(f, &it.span))),
+ block: f.fold_block(node.block),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_await<F>(f: &mut F, node: ExprAwait) -> ExprAwait
+where
+ F: Fold + ?Sized,
+{
+ ExprAwait {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ base: Box::new(f.fold_expr(*node.base)),
+ dot_token: Token![.](tokens_helper(f, &node.dot_token.spans)),
+ await_token: crate::token::Await(tokens_helper(f, &node.await_token.span)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_expr_binary<F>(f: &mut F, node: ExprBinary) -> ExprBinary
+where
+ F: Fold + ?Sized,
+{
+ ExprBinary {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ left: Box::new(f.fold_expr(*node.left)),
+ op: f.fold_bin_op(node.op),
+ right: Box::new(f.fold_expr(*node.right)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_block<F>(f: &mut F, node: ExprBlock) -> ExprBlock
+where
+ F: Fold + ?Sized,
+{
+ ExprBlock {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ label: (node.label).map(|it| f.fold_label(it)),
+ block: f.fold_block(node.block),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_box<F>(f: &mut F, node: ExprBox) -> ExprBox
+where
+ F: Fold + ?Sized,
+{
+ ExprBox {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ box_token: Token![box](tokens_helper(f, &node.box_token.span)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_break<F>(f: &mut F, node: ExprBreak) -> ExprBreak
+where
+ F: Fold + ?Sized,
+{
+ ExprBreak {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ break_token: Token![break](tokens_helper(f, &node.break_token.span)),
+ label: (node.label).map(|it| f.fold_lifetime(it)),
+ expr: (node.expr).map(|it| Box::new(f.fold_expr(*it))),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_expr_call<F>(f: &mut F, node: ExprCall) -> ExprCall
+where
+ F: Fold + ?Sized,
+{
+ ExprCall {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ func: Box::new(f.fold_expr(*node.func)),
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ args: FoldHelper::lift(node.args, |it| f.fold_expr(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_expr_cast<F>(f: &mut F, node: ExprCast) -> ExprCast
+where
+ F: Fold + ?Sized,
+{
+ ExprCast {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ as_token: Token![as](tokens_helper(f, &node.as_token.span)),
+ ty: Box::new(f.fold_type(*node.ty)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_closure<F>(f: &mut F, node: ExprClosure) -> ExprClosure
+where
+ F: Fold + ?Sized,
+{
+ ExprClosure {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ movability: (node.movability)
+ .map(|it| Token![static](tokens_helper(f, &it.span))),
+ asyncness: (node.asyncness).map(|it| Token![async](tokens_helper(f, &it.span))),
+ capture: (node.capture).map(|it| Token![move](tokens_helper(f, &it.span))),
+ or1_token: Token![|](tokens_helper(f, &node.or1_token.spans)),
+ inputs: FoldHelper::lift(node.inputs, |it| f.fold_pat(it)),
+ or2_token: Token![|](tokens_helper(f, &node.or2_token.spans)),
+ output: f.fold_return_type(node.output),
+ body: Box::new(f.fold_expr(*node.body)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_continue<F>(f: &mut F, node: ExprContinue) -> ExprContinue
+where
+ F: Fold + ?Sized,
+{
+ ExprContinue {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ continue_token: Token![continue](tokens_helper(f, &node.continue_token.span)),
+ label: (node.label).map(|it| f.fold_lifetime(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_expr_field<F>(f: &mut F, node: ExprField) -> ExprField
+where
+ F: Fold + ?Sized,
+{
+ ExprField {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ base: Box::new(f.fold_expr(*node.base)),
+ dot_token: Token![.](tokens_helper(f, &node.dot_token.spans)),
+ member: f.fold_member(node.member),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_for_loop<F>(f: &mut F, node: ExprForLoop) -> ExprForLoop
+where
+ F: Fold + ?Sized,
+{
+ ExprForLoop {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ label: (node.label).map(|it| f.fold_label(it)),
+ for_token: Token![for](tokens_helper(f, &node.for_token.span)),
+ pat: f.fold_pat(node.pat),
+ in_token: Token![in](tokens_helper(f, &node.in_token.span)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ body: f.fold_block(node.body),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_group<F>(f: &mut F, node: ExprGroup) -> ExprGroup
+where
+ F: Fold + ?Sized,
+{
+ ExprGroup {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ group_token: Group(tokens_helper(f, &node.group_token.span)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_if<F>(f: &mut F, node: ExprIf) -> ExprIf
+where
+ F: Fold + ?Sized,
+{
+ ExprIf {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ if_token: Token![if](tokens_helper(f, &node.if_token.span)),
+ cond: Box::new(f.fold_expr(*node.cond)),
+ then_branch: f.fold_block(node.then_branch),
+ else_branch: (node.else_branch)
+ .map(|it| (
+ Token![else](tokens_helper(f, &(it).0.span)),
+ Box::new(f.fold_expr(*(it).1)),
+ )),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_expr_index<F>(f: &mut F, node: ExprIndex) -> ExprIndex
+where
+ F: Fold + ?Sized,
+{
+ ExprIndex {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ bracket_token: Bracket(tokens_helper(f, &node.bracket_token.span)),
+ index: Box::new(f.fold_expr(*node.index)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_let<F>(f: &mut F, node: ExprLet) -> ExprLet
+where
+ F: Fold + ?Sized,
+{
+ ExprLet {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ let_token: Token![let](tokens_helper(f, &node.let_token.span)),
+ pat: f.fold_pat(node.pat),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_expr_lit<F>(f: &mut F, node: ExprLit) -> ExprLit
+where
+ F: Fold + ?Sized,
+{
+ ExprLit {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ lit: f.fold_lit(node.lit),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_loop<F>(f: &mut F, node: ExprLoop) -> ExprLoop
+where
+ F: Fold + ?Sized,
+{
+ ExprLoop {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ label: (node.label).map(|it| f.fold_label(it)),
+ loop_token: Token![loop](tokens_helper(f, &node.loop_token.span)),
+ body: f.fold_block(node.body),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_macro<F>(f: &mut F, node: ExprMacro) -> ExprMacro
+where
+ F: Fold + ?Sized,
+{
+ ExprMacro {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ mac: f.fold_macro(node.mac),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_match<F>(f: &mut F, node: ExprMatch) -> ExprMatch
+where
+ F: Fold + ?Sized,
+{
+ ExprMatch {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ match_token: Token![match](tokens_helper(f, &node.match_token.span)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ arms: FoldHelper::lift(node.arms, |it| f.fold_arm(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_method_call<F>(f: &mut F, node: ExprMethodCall) -> ExprMethodCall
+where
+ F: Fold + ?Sized,
+{
+ ExprMethodCall {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ receiver: Box::new(f.fold_expr(*node.receiver)),
+ dot_token: Token![.](tokens_helper(f, &node.dot_token.spans)),
+ method: f.fold_ident(node.method),
+ turbofish: (node.turbofish).map(|it| f.fold_method_turbofish(it)),
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ args: FoldHelper::lift(node.args, |it| f.fold_expr(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_expr_paren<F>(f: &mut F, node: ExprParen) -> ExprParen
+where
+ F: Fold + ?Sized,
+{
+ ExprParen {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_expr_path<F>(f: &mut F, node: ExprPath) -> ExprPath
+where
+ F: Fold + ?Sized,
+{
+ ExprPath {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ qself: (node.qself).map(|it| f.fold_qself(it)),
+ path: f.fold_path(node.path),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_range<F>(f: &mut F, node: ExprRange) -> ExprRange
+where
+ F: Fold + ?Sized,
+{
+ ExprRange {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ from: (node.from).map(|it| Box::new(f.fold_expr(*it))),
+ limits: f.fold_range_limits(node.limits),
+ to: (node.to).map(|it| Box::new(f.fold_expr(*it))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_reference<F>(f: &mut F, node: ExprReference) -> ExprReference
+where
+ F: Fold + ?Sized,
+{
+ ExprReference {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ and_token: Token![&](tokens_helper(f, &node.and_token.spans)),
+ raw: node.raw,
+ mutability: (node.mutability).map(|it| Token![mut](tokens_helper(f, &it.span))),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_repeat<F>(f: &mut F, node: ExprRepeat) -> ExprRepeat
+where
+ F: Fold + ?Sized,
+{
+ ExprRepeat {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ bracket_token: Bracket(tokens_helper(f, &node.bracket_token.span)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ len: Box::new(f.fold_expr(*node.len)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_return<F>(f: &mut F, node: ExprReturn) -> ExprReturn
+where
+ F: Fold + ?Sized,
+{
+ ExprReturn {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ return_token: Token![return](tokens_helper(f, &node.return_token.span)),
+ expr: (node.expr).map(|it| Box::new(f.fold_expr(*it))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_struct<F>(f: &mut F, node: ExprStruct) -> ExprStruct
+where
+ F: Fold + ?Sized,
+{
+ ExprStruct {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ path: f.fold_path(node.path),
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ fields: FoldHelper::lift(node.fields, |it| f.fold_field_value(it)),
+ dot2_token: (node.dot2_token).map(|it| Token![..](tokens_helper(f, &it.spans))),
+ rest: (node.rest).map(|it| Box::new(f.fold_expr(*it))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_try<F>(f: &mut F, node: ExprTry) -> ExprTry
+where
+ F: Fold + ?Sized,
+{
+ ExprTry {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ question_token: Token![?](tokens_helper(f, &node.question_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_try_block<F>(f: &mut F, node: ExprTryBlock) -> ExprTryBlock
+where
+ F: Fold + ?Sized,
+{
+ ExprTryBlock {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ try_token: Token![try](tokens_helper(f, &node.try_token.span)),
+ block: f.fold_block(node.block),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_tuple<F>(f: &mut F, node: ExprTuple) -> ExprTuple
+where
+ F: Fold + ?Sized,
+{
+ ExprTuple {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ elems: FoldHelper::lift(node.elems, |it| f.fold_expr(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_type<F>(f: &mut F, node: ExprType) -> ExprType
+where
+ F: Fold + ?Sized,
+{
+ ExprType {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ ty: Box::new(f.fold_type(*node.ty)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_expr_unary<F>(f: &mut F, node: ExprUnary) -> ExprUnary
+where
+ F: Fold + ?Sized,
+{
+ ExprUnary {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ op: f.fold_un_op(node.op),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_unsafe<F>(f: &mut F, node: ExprUnsafe) -> ExprUnsafe
+where
+ F: Fold + ?Sized,
+{
+ ExprUnsafe {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ unsafe_token: Token![unsafe](tokens_helper(f, &node.unsafe_token.span)),
+ block: f.fold_block(node.block),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_while<F>(f: &mut F, node: ExprWhile) -> ExprWhile
+where
+ F: Fold + ?Sized,
+{
+ ExprWhile {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ label: (node.label).map(|it| f.fold_label(it)),
+ while_token: Token![while](tokens_helper(f, &node.while_token.span)),
+ cond: Box::new(f.fold_expr(*node.cond)),
+ body: f.fold_block(node.body),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_expr_yield<F>(f: &mut F, node: ExprYield) -> ExprYield
+where
+ F: Fold + ?Sized,
+{
+ ExprYield {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ yield_token: Token![yield](tokens_helper(f, &node.yield_token.span)),
+ expr: (node.expr).map(|it| Box::new(f.fold_expr(*it))),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_field<F>(f: &mut F, node: Field) -> Field
+where
+ F: Fold + ?Sized,
+{
+ Field {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ ident: (node.ident).map(|it| f.fold_ident(it)),
+ colon_token: (node.colon_token).map(|it| Token![:](tokens_helper(f, &it.spans))),
+ ty: f.fold_type(node.ty),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_field_pat<F>(f: &mut F, node: FieldPat) -> FieldPat
+where
+ F: Fold + ?Sized,
+{
+ FieldPat {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ member: f.fold_member(node.member),
+ colon_token: (node.colon_token).map(|it| Token![:](tokens_helper(f, &it.spans))),
+ pat: Box::new(f.fold_pat(*node.pat)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_field_value<F>(f: &mut F, node: FieldValue) -> FieldValue
+where
+ F: Fold + ?Sized,
+{
+ FieldValue {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ member: f.fold_member(node.member),
+ colon_token: (node.colon_token).map(|it| Token![:](tokens_helper(f, &it.spans))),
+ expr: f.fold_expr(node.expr),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_fields<F>(f: &mut F, node: Fields) -> Fields
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Fields::Named(_binding_0) => Fields::Named(f.fold_fields_named(_binding_0)),
+ Fields::Unnamed(_binding_0) => Fields::Unnamed(f.fold_fields_unnamed(_binding_0)),
+ Fields::Unit => Fields::Unit,
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_fields_named<F>(f: &mut F, node: FieldsNamed) -> FieldsNamed
+where
+ F: Fold + ?Sized,
+{
+ FieldsNamed {
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ named: FoldHelper::lift(node.named, |it| f.fold_field(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_fields_unnamed<F>(f: &mut F, node: FieldsUnnamed) -> FieldsUnnamed
+where
+ F: Fold + ?Sized,
+{
+ FieldsUnnamed {
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ unnamed: FoldHelper::lift(node.unnamed, |it| f.fold_field(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_file<F>(f: &mut F, node: File) -> File
+where
+ F: Fold + ?Sized,
+{
+ File {
+ shebang: node.shebang,
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ items: FoldHelper::lift(node.items, |it| f.fold_item(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_fn_arg<F>(f: &mut F, node: FnArg) -> FnArg
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ FnArg::Receiver(_binding_0) => FnArg::Receiver(f.fold_receiver(_binding_0)),
+ FnArg::Typed(_binding_0) => FnArg::Typed(f.fold_pat_type(_binding_0)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_foreign_item<F>(f: &mut F, node: ForeignItem) -> ForeignItem
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ ForeignItem::Fn(_binding_0) => {
+ ForeignItem::Fn(f.fold_foreign_item_fn(_binding_0))
+ }
+ ForeignItem::Static(_binding_0) => {
+ ForeignItem::Static(f.fold_foreign_item_static(_binding_0))
+ }
+ ForeignItem::Type(_binding_0) => {
+ ForeignItem::Type(f.fold_foreign_item_type(_binding_0))
+ }
+ ForeignItem::Macro(_binding_0) => {
+ ForeignItem::Macro(f.fold_foreign_item_macro(_binding_0))
+ }
+ ForeignItem::Verbatim(_binding_0) => ForeignItem::Verbatim(_binding_0),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_foreign_item_fn<F>(f: &mut F, node: ForeignItemFn) -> ForeignItemFn
+where
+ F: Fold + ?Sized,
+{
+ ForeignItemFn {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ sig: f.fold_signature(node.sig),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_foreign_item_macro<F>(f: &mut F, node: ForeignItemMacro) -> ForeignItemMacro
+where
+ F: Fold + ?Sized,
+{
+ ForeignItemMacro {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ mac: f.fold_macro(node.mac),
+ semi_token: (node.semi_token).map(|it| Token![;](tokens_helper(f, &it.spans))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_foreign_item_static<F>(
+ f: &mut F,
+ node: ForeignItemStatic,
+) -> ForeignItemStatic
+where
+ F: Fold + ?Sized,
+{
+ ForeignItemStatic {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ static_token: Token![static](tokens_helper(f, &node.static_token.span)),
+ mutability: (node.mutability).map(|it| Token![mut](tokens_helper(f, &it.span))),
+ ident: f.fold_ident(node.ident),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ ty: Box::new(f.fold_type(*node.ty)),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_foreign_item_type<F>(f: &mut F, node: ForeignItemType) -> ForeignItemType
+where
+ F: Fold + ?Sized,
+{
+ ForeignItemType {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ type_token: Token![type](tokens_helper(f, &node.type_token.span)),
+ ident: f.fold_ident(node.ident),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_generic_argument<F>(f: &mut F, node: GenericArgument) -> GenericArgument
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ GenericArgument::Lifetime(_binding_0) => {
+ GenericArgument::Lifetime(f.fold_lifetime(_binding_0))
+ }
+ GenericArgument::Type(_binding_0) => {
+ GenericArgument::Type(f.fold_type(_binding_0))
+ }
+ GenericArgument::Const(_binding_0) => {
+ GenericArgument::Const(f.fold_expr(_binding_0))
+ }
+ GenericArgument::Binding(_binding_0) => {
+ GenericArgument::Binding(f.fold_binding(_binding_0))
+ }
+ GenericArgument::Constraint(_binding_0) => {
+ GenericArgument::Constraint(f.fold_constraint(_binding_0))
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_generic_method_argument<F>(
+ f: &mut F,
+ node: GenericMethodArgument,
+) -> GenericMethodArgument
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ GenericMethodArgument::Type(_binding_0) => {
+ GenericMethodArgument::Type(f.fold_type(_binding_0))
+ }
+ GenericMethodArgument::Const(_binding_0) => {
+ GenericMethodArgument::Const(f.fold_expr(_binding_0))
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_generic_param<F>(f: &mut F, node: GenericParam) -> GenericParam
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ GenericParam::Type(_binding_0) => {
+ GenericParam::Type(f.fold_type_param(_binding_0))
+ }
+ GenericParam::Lifetime(_binding_0) => {
+ GenericParam::Lifetime(f.fold_lifetime_def(_binding_0))
+ }
+ GenericParam::Const(_binding_0) => {
+ GenericParam::Const(f.fold_const_param(_binding_0))
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_generics<F>(f: &mut F, node: Generics) -> Generics
+where
+ F: Fold + ?Sized,
+{
+ Generics {
+ lt_token: (node.lt_token).map(|it| Token![<](tokens_helper(f, &it.spans))),
+ params: FoldHelper::lift(node.params, |it| f.fold_generic_param(it)),
+ gt_token: (node.gt_token).map(|it| Token![>](tokens_helper(f, &it.spans))),
+ where_clause: (node.where_clause).map(|it| f.fold_where_clause(it)),
+ }
+}
+pub fn fold_ident<F>(f: &mut F, node: Ident) -> Ident
+where
+ F: Fold + ?Sized,
+{
+ let mut node = node;
+ let span = f.fold_span(node.span());
+ node.set_span(span);
+ node
+}
+#[cfg(feature = "full")]
+pub fn fold_impl_item<F>(f: &mut F, node: ImplItem) -> ImplItem
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ ImplItem::Const(_binding_0) => {
+ ImplItem::Const(f.fold_impl_item_const(_binding_0))
+ }
+ ImplItem::Method(_binding_0) => {
+ ImplItem::Method(f.fold_impl_item_method(_binding_0))
+ }
+ ImplItem::Type(_binding_0) => ImplItem::Type(f.fold_impl_item_type(_binding_0)),
+ ImplItem::Macro(_binding_0) => {
+ ImplItem::Macro(f.fold_impl_item_macro(_binding_0))
+ }
+ ImplItem::Verbatim(_binding_0) => ImplItem::Verbatim(_binding_0),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_impl_item_const<F>(f: &mut F, node: ImplItemConst) -> ImplItemConst
+where
+ F: Fold + ?Sized,
+{
+ ImplItemConst {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ defaultness: (node.defaultness)
+ .map(|it| Token![default](tokens_helper(f, &it.span))),
+ const_token: Token![const](tokens_helper(f, &node.const_token.span)),
+ ident: f.fold_ident(node.ident),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ ty: f.fold_type(node.ty),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ expr: f.fold_expr(node.expr),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_impl_item_macro<F>(f: &mut F, node: ImplItemMacro) -> ImplItemMacro
+where
+ F: Fold + ?Sized,
+{
+ ImplItemMacro {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ mac: f.fold_macro(node.mac),
+ semi_token: (node.semi_token).map(|it| Token![;](tokens_helper(f, &it.spans))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_impl_item_method<F>(f: &mut F, node: ImplItemMethod) -> ImplItemMethod
+where
+ F: Fold + ?Sized,
+{
+ ImplItemMethod {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ defaultness: (node.defaultness)
+ .map(|it| Token![default](tokens_helper(f, &it.span))),
+ sig: f.fold_signature(node.sig),
+ block: f.fold_block(node.block),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_impl_item_type<F>(f: &mut F, node: ImplItemType) -> ImplItemType
+where
+ F: Fold + ?Sized,
+{
+ ImplItemType {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ defaultness: (node.defaultness)
+ .map(|it| Token![default](tokens_helper(f, &it.span))),
+ type_token: Token![type](tokens_helper(f, &node.type_token.span)),
+ ident: f.fold_ident(node.ident),
+ generics: f.fold_generics(node.generics),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ ty: f.fold_type(node.ty),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_index<F>(f: &mut F, node: Index) -> Index
+where
+ F: Fold + ?Sized,
+{
+ Index {
+ index: node.index,
+ span: f.fold_span(node.span),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item<F>(f: &mut F, node: Item) -> Item
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Item::Const(_binding_0) => Item::Const(f.fold_item_const(_binding_0)),
+ Item::Enum(_binding_0) => Item::Enum(f.fold_item_enum(_binding_0)),
+ Item::ExternCrate(_binding_0) => {
+ Item::ExternCrate(f.fold_item_extern_crate(_binding_0))
+ }
+ Item::Fn(_binding_0) => Item::Fn(f.fold_item_fn(_binding_0)),
+ Item::ForeignMod(_binding_0) => {
+ Item::ForeignMod(f.fold_item_foreign_mod(_binding_0))
+ }
+ Item::Impl(_binding_0) => Item::Impl(f.fold_item_impl(_binding_0)),
+ Item::Macro(_binding_0) => Item::Macro(f.fold_item_macro(_binding_0)),
+ Item::Macro2(_binding_0) => Item::Macro2(f.fold_item_macro2(_binding_0)),
+ Item::Mod(_binding_0) => Item::Mod(f.fold_item_mod(_binding_0)),
+ Item::Static(_binding_0) => Item::Static(f.fold_item_static(_binding_0)),
+ Item::Struct(_binding_0) => Item::Struct(f.fold_item_struct(_binding_0)),
+ Item::Trait(_binding_0) => Item::Trait(f.fold_item_trait(_binding_0)),
+ Item::TraitAlias(_binding_0) => {
+ Item::TraitAlias(f.fold_item_trait_alias(_binding_0))
+ }
+ Item::Type(_binding_0) => Item::Type(f.fold_item_type(_binding_0)),
+ Item::Union(_binding_0) => Item::Union(f.fold_item_union(_binding_0)),
+ Item::Use(_binding_0) => Item::Use(f.fold_item_use(_binding_0)),
+ Item::Verbatim(_binding_0) => Item::Verbatim(_binding_0),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_const<F>(f: &mut F, node: ItemConst) -> ItemConst
+where
+ F: Fold + ?Sized,
+{
+ ItemConst {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ const_token: Token![const](tokens_helper(f, &node.const_token.span)),
+ ident: f.fold_ident(node.ident),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ ty: Box::new(f.fold_type(*node.ty)),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_enum<F>(f: &mut F, node: ItemEnum) -> ItemEnum
+where
+ F: Fold + ?Sized,
+{
+ ItemEnum {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ enum_token: Token![enum](tokens_helper(f, &node.enum_token.span)),
+ ident: f.fold_ident(node.ident),
+ generics: f.fold_generics(node.generics),
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ variants: FoldHelper::lift(node.variants, |it| f.fold_variant(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_extern_crate<F>(f: &mut F, node: ItemExternCrate) -> ItemExternCrate
+where
+ F: Fold + ?Sized,
+{
+ ItemExternCrate {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ extern_token: Token![extern](tokens_helper(f, &node.extern_token.span)),
+ crate_token: Token![crate](tokens_helper(f, &node.crate_token.span)),
+ ident: f.fold_ident(node.ident),
+ rename: (node.rename)
+ .map(|it| (
+ Token![as](tokens_helper(f, &(it).0.span)),
+ f.fold_ident((it).1),
+ )),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_fn<F>(f: &mut F, node: ItemFn) -> ItemFn
+where
+ F: Fold + ?Sized,
+{
+ ItemFn {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ sig: f.fold_signature(node.sig),
+ block: Box::new(f.fold_block(*node.block)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_foreign_mod<F>(f: &mut F, node: ItemForeignMod) -> ItemForeignMod
+where
+ F: Fold + ?Sized,
+{
+ ItemForeignMod {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ abi: f.fold_abi(node.abi),
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ items: FoldHelper::lift(node.items, |it| f.fold_foreign_item(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_impl<F>(f: &mut F, node: ItemImpl) -> ItemImpl
+where
+ F: Fold + ?Sized,
+{
+ ItemImpl {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ defaultness: (node.defaultness)
+ .map(|it| Token![default](tokens_helper(f, &it.span))),
+ unsafety: (node.unsafety).map(|it| Token![unsafe](tokens_helper(f, &it.span))),
+ impl_token: Token![impl](tokens_helper(f, &node.impl_token.span)),
+ generics: f.fold_generics(node.generics),
+ trait_: (node.trait_)
+ .map(|it| (
+ ((it).0).map(|it| Token![!](tokens_helper(f, &it.spans))),
+ f.fold_path((it).1),
+ Token![for](tokens_helper(f, &(it).2.span)),
+ )),
+ self_ty: Box::new(f.fold_type(*node.self_ty)),
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ items: FoldHelper::lift(node.items, |it| f.fold_impl_item(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_macro<F>(f: &mut F, node: ItemMacro) -> ItemMacro
+where
+ F: Fold + ?Sized,
+{
+ ItemMacro {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ ident: (node.ident).map(|it| f.fold_ident(it)),
+ mac: f.fold_macro(node.mac),
+ semi_token: (node.semi_token).map(|it| Token![;](tokens_helper(f, &it.spans))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_macro2<F>(f: &mut F, node: ItemMacro2) -> ItemMacro2
+where
+ F: Fold + ?Sized,
+{
+ ItemMacro2 {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ macro_token: Token![macro](tokens_helper(f, &node.macro_token.span)),
+ ident: f.fold_ident(node.ident),
+ rules: node.rules,
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_mod<F>(f: &mut F, node: ItemMod) -> ItemMod
+where
+ F: Fold + ?Sized,
+{
+ ItemMod {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ mod_token: Token![mod](tokens_helper(f, &node.mod_token.span)),
+ ident: f.fold_ident(node.ident),
+ content: (node.content)
+ .map(|it| (
+ Brace(tokens_helper(f, &(it).0.span)),
+ FoldHelper::lift((it).1, |it| f.fold_item(it)),
+ )),
+ semi: (node.semi).map(|it| Token![;](tokens_helper(f, &it.spans))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_static<F>(f: &mut F, node: ItemStatic) -> ItemStatic
+where
+ F: Fold + ?Sized,
+{
+ ItemStatic {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ static_token: Token![static](tokens_helper(f, &node.static_token.span)),
+ mutability: (node.mutability).map(|it| Token![mut](tokens_helper(f, &it.span))),
+ ident: f.fold_ident(node.ident),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ ty: Box::new(f.fold_type(*node.ty)),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_struct<F>(f: &mut F, node: ItemStruct) -> ItemStruct
+where
+ F: Fold + ?Sized,
+{
+ ItemStruct {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ struct_token: Token![struct](tokens_helper(f, &node.struct_token.span)),
+ ident: f.fold_ident(node.ident),
+ generics: f.fold_generics(node.generics),
+ fields: f.fold_fields(node.fields),
+ semi_token: (node.semi_token).map(|it| Token![;](tokens_helper(f, &it.spans))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_trait<F>(f: &mut F, node: ItemTrait) -> ItemTrait
+where
+ F: Fold + ?Sized,
+{
+ ItemTrait {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ unsafety: (node.unsafety).map(|it| Token![unsafe](tokens_helper(f, &it.span))),
+ auto_token: (node.auto_token).map(|it| Token![auto](tokens_helper(f, &it.span))),
+ trait_token: Token![trait](tokens_helper(f, &node.trait_token.span)),
+ ident: f.fold_ident(node.ident),
+ generics: f.fold_generics(node.generics),
+ colon_token: (node.colon_token).map(|it| Token![:](tokens_helper(f, &it.spans))),
+ supertraits: FoldHelper::lift(
+ node.supertraits,
+ |it| f.fold_type_param_bound(it),
+ ),
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ items: FoldHelper::lift(node.items, |it| f.fold_trait_item(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_trait_alias<F>(f: &mut F, node: ItemTraitAlias) -> ItemTraitAlias
+where
+ F: Fold + ?Sized,
+{
+ ItemTraitAlias {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ trait_token: Token![trait](tokens_helper(f, &node.trait_token.span)),
+ ident: f.fold_ident(node.ident),
+ generics: f.fold_generics(node.generics),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ bounds: FoldHelper::lift(node.bounds, |it| f.fold_type_param_bound(it)),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_type<F>(f: &mut F, node: ItemType) -> ItemType
+where
+ F: Fold + ?Sized,
+{
+ ItemType {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ type_token: Token![type](tokens_helper(f, &node.type_token.span)),
+ ident: f.fold_ident(node.ident),
+ generics: f.fold_generics(node.generics),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ ty: Box::new(f.fold_type(*node.ty)),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_union<F>(f: &mut F, node: ItemUnion) -> ItemUnion
+where
+ F: Fold + ?Sized,
+{
+ ItemUnion {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ union_token: Token![union](tokens_helper(f, &node.union_token.span)),
+ ident: f.fold_ident(node.ident),
+ generics: f.fold_generics(node.generics),
+ fields: f.fold_fields_named(node.fields),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_item_use<F>(f: &mut F, node: ItemUse) -> ItemUse
+where
+ F: Fold + ?Sized,
+{
+ ItemUse {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ vis: f.fold_visibility(node.vis),
+ use_token: Token![use](tokens_helper(f, &node.use_token.span)),
+ leading_colon: (node.leading_colon)
+ .map(|it| Token![::](tokens_helper(f, &it.spans))),
+ tree: f.fold_use_tree(node.tree),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_label<F>(f: &mut F, node: Label) -> Label
+where
+ F: Fold + ?Sized,
+{
+ Label {
+ name: f.fold_lifetime(node.name),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ }
+}
+pub fn fold_lifetime<F>(f: &mut F, node: Lifetime) -> Lifetime
+where
+ F: Fold + ?Sized,
+{
+ Lifetime {
+ apostrophe: f.fold_span(node.apostrophe),
+ ident: f.fold_ident(node.ident),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_lifetime_def<F>(f: &mut F, node: LifetimeDef) -> LifetimeDef
+where
+ F: Fold + ?Sized,
+{
+ LifetimeDef {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ lifetime: f.fold_lifetime(node.lifetime),
+ colon_token: (node.colon_token).map(|it| Token![:](tokens_helper(f, &it.spans))),
+ bounds: FoldHelper::lift(node.bounds, |it| f.fold_lifetime(it)),
+ }
+}
+pub fn fold_lit<F>(f: &mut F, node: Lit) -> Lit
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Lit::Str(_binding_0) => Lit::Str(f.fold_lit_str(_binding_0)),
+ Lit::ByteStr(_binding_0) => Lit::ByteStr(f.fold_lit_byte_str(_binding_0)),
+ Lit::Byte(_binding_0) => Lit::Byte(f.fold_lit_byte(_binding_0)),
+ Lit::Char(_binding_0) => Lit::Char(f.fold_lit_char(_binding_0)),
+ Lit::Int(_binding_0) => Lit::Int(f.fold_lit_int(_binding_0)),
+ Lit::Float(_binding_0) => Lit::Float(f.fold_lit_float(_binding_0)),
+ Lit::Bool(_binding_0) => Lit::Bool(f.fold_lit_bool(_binding_0)),
+ Lit::Verbatim(_binding_0) => Lit::Verbatim(_binding_0),
+ }
+}
+pub fn fold_lit_bool<F>(f: &mut F, node: LitBool) -> LitBool
+where
+ F: Fold + ?Sized,
+{
+ LitBool {
+ value: node.value,
+ span: f.fold_span(node.span),
+ }
+}
+pub fn fold_lit_byte<F>(f: &mut F, node: LitByte) -> LitByte
+where
+ F: Fold + ?Sized,
+{
+ let span = f.fold_span(node.span());
+ let mut node = node;
+ node.set_span(span);
+ node
+}
+pub fn fold_lit_byte_str<F>(f: &mut F, node: LitByteStr) -> LitByteStr
+where
+ F: Fold + ?Sized,
+{
+ let span = f.fold_span(node.span());
+ let mut node = node;
+ node.set_span(span);
+ node
+}
+pub fn fold_lit_char<F>(f: &mut F, node: LitChar) -> LitChar
+where
+ F: Fold + ?Sized,
+{
+ let span = f.fold_span(node.span());
+ let mut node = node;
+ node.set_span(span);
+ node
+}
+pub fn fold_lit_float<F>(f: &mut F, node: LitFloat) -> LitFloat
+where
+ F: Fold + ?Sized,
+{
+ let span = f.fold_span(node.span());
+ let mut node = node;
+ node.set_span(span);
+ node
+}
+pub fn fold_lit_int<F>(f: &mut F, node: LitInt) -> LitInt
+where
+ F: Fold + ?Sized,
+{
+ let span = f.fold_span(node.span());
+ let mut node = node;
+ node.set_span(span);
+ node
+}
+pub fn fold_lit_str<F>(f: &mut F, node: LitStr) -> LitStr
+where
+ F: Fold + ?Sized,
+{
+ let span = f.fold_span(node.span());
+ let mut node = node;
+ node.set_span(span);
+ node
+}
+#[cfg(feature = "full")]
+pub fn fold_local<F>(f: &mut F, node: Local) -> Local
+where
+ F: Fold + ?Sized,
+{
+ Local {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ let_token: Token![let](tokens_helper(f, &node.let_token.span)),
+ pat: f.fold_pat(node.pat),
+ init: (node.init)
+ .map(|it| (
+ Token![=](tokens_helper(f, &(it).0.spans)),
+ Box::new(f.fold_expr(*(it).1)),
+ )),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_macro<F>(f: &mut F, node: Macro) -> Macro
+where
+ F: Fold + ?Sized,
+{
+ Macro {
+ path: f.fold_path(node.path),
+ bang_token: Token![!](tokens_helper(f, &node.bang_token.spans)),
+ delimiter: f.fold_macro_delimiter(node.delimiter),
+ tokens: node.tokens,
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_macro_delimiter<F>(f: &mut F, node: MacroDelimiter) -> MacroDelimiter
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ MacroDelimiter::Paren(_binding_0) => {
+ MacroDelimiter::Paren(Paren(tokens_helper(f, &_binding_0.span)))
+ }
+ MacroDelimiter::Brace(_binding_0) => {
+ MacroDelimiter::Brace(Brace(tokens_helper(f, &_binding_0.span)))
+ }
+ MacroDelimiter::Bracket(_binding_0) => {
+ MacroDelimiter::Bracket(Bracket(tokens_helper(f, &_binding_0.span)))
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_member<F>(f: &mut F, node: Member) -> Member
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Member::Named(_binding_0) => Member::Named(f.fold_ident(_binding_0)),
+ Member::Unnamed(_binding_0) => Member::Unnamed(f.fold_index(_binding_0)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_meta<F>(f: &mut F, node: Meta) -> Meta
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Meta::Path(_binding_0) => Meta::Path(f.fold_path(_binding_0)),
+ Meta::List(_binding_0) => Meta::List(f.fold_meta_list(_binding_0)),
+ Meta::NameValue(_binding_0) => {
+ Meta::NameValue(f.fold_meta_name_value(_binding_0))
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_meta_list<F>(f: &mut F, node: MetaList) -> MetaList
+where
+ F: Fold + ?Sized,
+{
+ MetaList {
+ path: f.fold_path(node.path),
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ nested: FoldHelper::lift(node.nested, |it| f.fold_nested_meta(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_meta_name_value<F>(f: &mut F, node: MetaNameValue) -> MetaNameValue
+where
+ F: Fold + ?Sized,
+{
+ MetaNameValue {
+ path: f.fold_path(node.path),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ lit: f.fold_lit(node.lit),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_method_turbofish<F>(f: &mut F, node: MethodTurbofish) -> MethodTurbofish
+where
+ F: Fold + ?Sized,
+{
+ MethodTurbofish {
+ colon2_token: Token![::](tokens_helper(f, &node.colon2_token.spans)),
+ lt_token: Token![<](tokens_helper(f, &node.lt_token.spans)),
+ args: FoldHelper::lift(node.args, |it| f.fold_generic_method_argument(it)),
+ gt_token: Token![>](tokens_helper(f, &node.gt_token.spans)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_nested_meta<F>(f: &mut F, node: NestedMeta) -> NestedMeta
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ NestedMeta::Meta(_binding_0) => NestedMeta::Meta(f.fold_meta(_binding_0)),
+ NestedMeta::Lit(_binding_0) => NestedMeta::Lit(f.fold_lit(_binding_0)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_parenthesized_generic_arguments<F>(
+ f: &mut F,
+ node: ParenthesizedGenericArguments,
+) -> ParenthesizedGenericArguments
+where
+ F: Fold + ?Sized,
+{
+ ParenthesizedGenericArguments {
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ inputs: FoldHelper::lift(node.inputs, |it| f.fold_type(it)),
+ output: f.fold_return_type(node.output),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat<F>(f: &mut F, node: Pat) -> Pat
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Pat::Box(_binding_0) => Pat::Box(f.fold_pat_box(_binding_0)),
+ Pat::Ident(_binding_0) => Pat::Ident(f.fold_pat_ident(_binding_0)),
+ Pat::Lit(_binding_0) => Pat::Lit(f.fold_pat_lit(_binding_0)),
+ Pat::Macro(_binding_0) => Pat::Macro(f.fold_pat_macro(_binding_0)),
+ Pat::Or(_binding_0) => Pat::Or(f.fold_pat_or(_binding_0)),
+ Pat::Path(_binding_0) => Pat::Path(f.fold_pat_path(_binding_0)),
+ Pat::Range(_binding_0) => Pat::Range(f.fold_pat_range(_binding_0)),
+ Pat::Reference(_binding_0) => Pat::Reference(f.fold_pat_reference(_binding_0)),
+ Pat::Rest(_binding_0) => Pat::Rest(f.fold_pat_rest(_binding_0)),
+ Pat::Slice(_binding_0) => Pat::Slice(f.fold_pat_slice(_binding_0)),
+ Pat::Struct(_binding_0) => Pat::Struct(f.fold_pat_struct(_binding_0)),
+ Pat::Tuple(_binding_0) => Pat::Tuple(f.fold_pat_tuple(_binding_0)),
+ Pat::TupleStruct(_binding_0) => {
+ Pat::TupleStruct(f.fold_pat_tuple_struct(_binding_0))
+ }
+ Pat::Type(_binding_0) => Pat::Type(f.fold_pat_type(_binding_0)),
+ Pat::Verbatim(_binding_0) => Pat::Verbatim(_binding_0),
+ Pat::Wild(_binding_0) => Pat::Wild(f.fold_pat_wild(_binding_0)),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_box<F>(f: &mut F, node: PatBox) -> PatBox
+where
+ F: Fold + ?Sized,
+{
+ PatBox {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ box_token: Token![box](tokens_helper(f, &node.box_token.span)),
+ pat: Box::new(f.fold_pat(*node.pat)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_ident<F>(f: &mut F, node: PatIdent) -> PatIdent
+where
+ F: Fold + ?Sized,
+{
+ PatIdent {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ by_ref: (node.by_ref).map(|it| Token![ref](tokens_helper(f, &it.span))),
+ mutability: (node.mutability).map(|it| Token![mut](tokens_helper(f, &it.span))),
+ ident: f.fold_ident(node.ident),
+ subpat: (node.subpat)
+ .map(|it| (
+ Token![@](tokens_helper(f, &(it).0.spans)),
+ Box::new(f.fold_pat(*(it).1)),
+ )),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_lit<F>(f: &mut F, node: PatLit) -> PatLit
+where
+ F: Fold + ?Sized,
+{
+ PatLit {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ expr: Box::new(f.fold_expr(*node.expr)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_macro<F>(f: &mut F, node: PatMacro) -> PatMacro
+where
+ F: Fold + ?Sized,
+{
+ PatMacro {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ mac: f.fold_macro(node.mac),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_or<F>(f: &mut F, node: PatOr) -> PatOr
+where
+ F: Fold + ?Sized,
+{
+ PatOr {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ leading_vert: (node.leading_vert)
+ .map(|it| Token![|](tokens_helper(f, &it.spans))),
+ cases: FoldHelper::lift(node.cases, |it| f.fold_pat(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_path<F>(f: &mut F, node: PatPath) -> PatPath
+where
+ F: Fold + ?Sized,
+{
+ PatPath {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ qself: (node.qself).map(|it| f.fold_qself(it)),
+ path: f.fold_path(node.path),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_range<F>(f: &mut F, node: PatRange) -> PatRange
+where
+ F: Fold + ?Sized,
+{
+ PatRange {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ lo: Box::new(f.fold_expr(*node.lo)),
+ limits: f.fold_range_limits(node.limits),
+ hi: Box::new(f.fold_expr(*node.hi)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_reference<F>(f: &mut F, node: PatReference) -> PatReference
+where
+ F: Fold + ?Sized,
+{
+ PatReference {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ and_token: Token![&](tokens_helper(f, &node.and_token.spans)),
+ mutability: (node.mutability).map(|it| Token![mut](tokens_helper(f, &it.span))),
+ pat: Box::new(f.fold_pat(*node.pat)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_rest<F>(f: &mut F, node: PatRest) -> PatRest
+where
+ F: Fold + ?Sized,
+{
+ PatRest {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ dot2_token: Token![..](tokens_helper(f, &node.dot2_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_slice<F>(f: &mut F, node: PatSlice) -> PatSlice
+where
+ F: Fold + ?Sized,
+{
+ PatSlice {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ bracket_token: Bracket(tokens_helper(f, &node.bracket_token.span)),
+ elems: FoldHelper::lift(node.elems, |it| f.fold_pat(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_struct<F>(f: &mut F, node: PatStruct) -> PatStruct
+where
+ F: Fold + ?Sized,
+{
+ PatStruct {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ path: f.fold_path(node.path),
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ fields: FoldHelper::lift(node.fields, |it| f.fold_field_pat(it)),
+ dot2_token: (node.dot2_token).map(|it| Token![..](tokens_helper(f, &it.spans))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_tuple<F>(f: &mut F, node: PatTuple) -> PatTuple
+where
+ F: Fold + ?Sized,
+{
+ PatTuple {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ elems: FoldHelper::lift(node.elems, |it| f.fold_pat(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_tuple_struct<F>(f: &mut F, node: PatTupleStruct) -> PatTupleStruct
+where
+ F: Fold + ?Sized,
+{
+ PatTupleStruct {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ path: f.fold_path(node.path),
+ pat: f.fold_pat_tuple(node.pat),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_type<F>(f: &mut F, node: PatType) -> PatType
+where
+ F: Fold + ?Sized,
+{
+ PatType {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ pat: Box::new(f.fold_pat(*node.pat)),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ ty: Box::new(f.fold_type(*node.ty)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_pat_wild<F>(f: &mut F, node: PatWild) -> PatWild
+where
+ F: Fold + ?Sized,
+{
+ PatWild {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ underscore_token: Token![_](tokens_helper(f, &node.underscore_token.spans)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_path<F>(f: &mut F, node: Path) -> Path
+where
+ F: Fold + ?Sized,
+{
+ Path {
+ leading_colon: (node.leading_colon)
+ .map(|it| Token![::](tokens_helper(f, &it.spans))),
+ segments: FoldHelper::lift(node.segments, |it| f.fold_path_segment(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_path_arguments<F>(f: &mut F, node: PathArguments) -> PathArguments
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ PathArguments::None => PathArguments::None,
+ PathArguments::AngleBracketed(_binding_0) => {
+ PathArguments::AngleBracketed(
+ f.fold_angle_bracketed_generic_arguments(_binding_0),
+ )
+ }
+ PathArguments::Parenthesized(_binding_0) => {
+ PathArguments::Parenthesized(
+ f.fold_parenthesized_generic_arguments(_binding_0),
+ )
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_path_segment<F>(f: &mut F, node: PathSegment) -> PathSegment
+where
+ F: Fold + ?Sized,
+{
+ PathSegment {
+ ident: f.fold_ident(node.ident),
+ arguments: f.fold_path_arguments(node.arguments),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_predicate_eq<F>(f: &mut F, node: PredicateEq) -> PredicateEq
+where
+ F: Fold + ?Sized,
+{
+ PredicateEq {
+ lhs_ty: f.fold_type(node.lhs_ty),
+ eq_token: Token![=](tokens_helper(f, &node.eq_token.spans)),
+ rhs_ty: f.fold_type(node.rhs_ty),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_predicate_lifetime<F>(
+ f: &mut F,
+ node: PredicateLifetime,
+) -> PredicateLifetime
+where
+ F: Fold + ?Sized,
+{
+ PredicateLifetime {
+ lifetime: f.fold_lifetime(node.lifetime),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ bounds: FoldHelper::lift(node.bounds, |it| f.fold_lifetime(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_predicate_type<F>(f: &mut F, node: PredicateType) -> PredicateType
+where
+ F: Fold + ?Sized,
+{
+ PredicateType {
+ lifetimes: (node.lifetimes).map(|it| f.fold_bound_lifetimes(it)),
+ bounded_ty: f.fold_type(node.bounded_ty),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ bounds: FoldHelper::lift(node.bounds, |it| f.fold_type_param_bound(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_qself<F>(f: &mut F, node: QSelf) -> QSelf
+where
+ F: Fold + ?Sized,
+{
+ QSelf {
+ lt_token: Token![<](tokens_helper(f, &node.lt_token.spans)),
+ ty: Box::new(f.fold_type(*node.ty)),
+ position: node.position,
+ as_token: (node.as_token).map(|it| Token![as](tokens_helper(f, &it.span))),
+ gt_token: Token![>](tokens_helper(f, &node.gt_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_range_limits<F>(f: &mut F, node: RangeLimits) -> RangeLimits
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ RangeLimits::HalfOpen(_binding_0) => {
+ RangeLimits::HalfOpen(Token![..](tokens_helper(f, &_binding_0.spans)))
+ }
+ RangeLimits::Closed(_binding_0) => {
+ RangeLimits::Closed(Token![..=](tokens_helper(f, &_binding_0.spans)))
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_receiver<F>(f: &mut F, node: Receiver) -> Receiver
+where
+ F: Fold + ?Sized,
+{
+ Receiver {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ reference: (node.reference)
+ .map(|it| (
+ Token![&](tokens_helper(f, &(it).0.spans)),
+ ((it).1).map(|it| f.fold_lifetime(it)),
+ )),
+ mutability: (node.mutability).map(|it| Token![mut](tokens_helper(f, &it.span))),
+ self_token: Token![self](tokens_helper(f, &node.self_token.span)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_return_type<F>(f: &mut F, node: ReturnType) -> ReturnType
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ ReturnType::Default => ReturnType::Default,
+ ReturnType::Type(_binding_0, _binding_1) => {
+ ReturnType::Type(
+ Token![->](tokens_helper(f, &_binding_0.spans)),
+ Box::new(f.fold_type(*_binding_1)),
+ )
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_signature<F>(f: &mut F, node: Signature) -> Signature
+where
+ F: Fold + ?Sized,
+{
+ Signature {
+ constness: (node.constness).map(|it| Token![const](tokens_helper(f, &it.span))),
+ asyncness: (node.asyncness).map(|it| Token![async](tokens_helper(f, &it.span))),
+ unsafety: (node.unsafety).map(|it| Token![unsafe](tokens_helper(f, &it.span))),
+ abi: (node.abi).map(|it| f.fold_abi(it)),
+ fn_token: Token![fn](tokens_helper(f, &node.fn_token.span)),
+ ident: f.fold_ident(node.ident),
+ generics: f.fold_generics(node.generics),
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ inputs: FoldHelper::lift(node.inputs, |it| f.fold_fn_arg(it)),
+ variadic: (node.variadic).map(|it| f.fold_variadic(it)),
+ output: f.fold_return_type(node.output),
+ }
+}
+pub fn fold_span<F>(f: &mut F, node: Span) -> Span
+where
+ F: Fold + ?Sized,
+{
+ node
+}
+#[cfg(feature = "full")]
+pub fn fold_stmt<F>(f: &mut F, node: Stmt) -> Stmt
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Stmt::Local(_binding_0) => Stmt::Local(f.fold_local(_binding_0)),
+ Stmt::Item(_binding_0) => Stmt::Item(f.fold_item(_binding_0)),
+ Stmt::Expr(_binding_0) => Stmt::Expr(f.fold_expr(_binding_0)),
+ Stmt::Semi(_binding_0, _binding_1) => {
+ Stmt::Semi(
+ f.fold_expr(_binding_0),
+ Token![;](tokens_helper(f, &_binding_1.spans)),
+ )
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_trait_bound<F>(f: &mut F, node: TraitBound) -> TraitBound
+where
+ F: Fold + ?Sized,
+{
+ TraitBound {
+ paren_token: (node.paren_token).map(|it| Paren(tokens_helper(f, &it.span))),
+ modifier: f.fold_trait_bound_modifier(node.modifier),
+ lifetimes: (node.lifetimes).map(|it| f.fold_bound_lifetimes(it)),
+ path: f.fold_path(node.path),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_trait_bound_modifier<F>(
+ f: &mut F,
+ node: TraitBoundModifier,
+) -> TraitBoundModifier
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ TraitBoundModifier::None => TraitBoundModifier::None,
+ TraitBoundModifier::Maybe(_binding_0) => {
+ TraitBoundModifier::Maybe(Token![?](tokens_helper(f, &_binding_0.spans)))
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_trait_item<F>(f: &mut F, node: TraitItem) -> TraitItem
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ TraitItem::Const(_binding_0) => {
+ TraitItem::Const(f.fold_trait_item_const(_binding_0))
+ }
+ TraitItem::Method(_binding_0) => {
+ TraitItem::Method(f.fold_trait_item_method(_binding_0))
+ }
+ TraitItem::Type(_binding_0) => {
+ TraitItem::Type(f.fold_trait_item_type(_binding_0))
+ }
+ TraitItem::Macro(_binding_0) => {
+ TraitItem::Macro(f.fold_trait_item_macro(_binding_0))
+ }
+ TraitItem::Verbatim(_binding_0) => TraitItem::Verbatim(_binding_0),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_trait_item_const<F>(f: &mut F, node: TraitItemConst) -> TraitItemConst
+where
+ F: Fold + ?Sized,
+{
+ TraitItemConst {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ const_token: Token![const](tokens_helper(f, &node.const_token.span)),
+ ident: f.fold_ident(node.ident),
+ colon_token: Token![:](tokens_helper(f, &node.colon_token.spans)),
+ ty: f.fold_type(node.ty),
+ default: (node.default)
+ .map(|it| (Token![=](tokens_helper(f, &(it).0.spans)), f.fold_expr((it).1))),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_trait_item_macro<F>(f: &mut F, node: TraitItemMacro) -> TraitItemMacro
+where
+ F: Fold + ?Sized,
+{
+ TraitItemMacro {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ mac: f.fold_macro(node.mac),
+ semi_token: (node.semi_token).map(|it| Token![;](tokens_helper(f, &it.spans))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_trait_item_method<F>(f: &mut F, node: TraitItemMethod) -> TraitItemMethod
+where
+ F: Fold + ?Sized,
+{
+ TraitItemMethod {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ sig: f.fold_signature(node.sig),
+ default: (node.default).map(|it| f.fold_block(it)),
+ semi_token: (node.semi_token).map(|it| Token![;](tokens_helper(f, &it.spans))),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_trait_item_type<F>(f: &mut F, node: TraitItemType) -> TraitItemType
+where
+ F: Fold + ?Sized,
+{
+ TraitItemType {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ type_token: Token![type](tokens_helper(f, &node.type_token.span)),
+ ident: f.fold_ident(node.ident),
+ generics: f.fold_generics(node.generics),
+ colon_token: (node.colon_token).map(|it| Token![:](tokens_helper(f, &it.spans))),
+ bounds: FoldHelper::lift(node.bounds, |it| f.fold_type_param_bound(it)),
+ default: (node.default)
+ .map(|it| (Token![=](tokens_helper(f, &(it).0.spans)), f.fold_type((it).1))),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type<F>(f: &mut F, node: Type) -> Type
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Type::Array(_binding_0) => Type::Array(f.fold_type_array(_binding_0)),
+ Type::BareFn(_binding_0) => Type::BareFn(f.fold_type_bare_fn(_binding_0)),
+ Type::Group(_binding_0) => Type::Group(f.fold_type_group(_binding_0)),
+ Type::ImplTrait(_binding_0) => {
+ Type::ImplTrait(f.fold_type_impl_trait(_binding_0))
+ }
+ Type::Infer(_binding_0) => Type::Infer(f.fold_type_infer(_binding_0)),
+ Type::Macro(_binding_0) => Type::Macro(f.fold_type_macro(_binding_0)),
+ Type::Never(_binding_0) => Type::Never(f.fold_type_never(_binding_0)),
+ Type::Paren(_binding_0) => Type::Paren(f.fold_type_paren(_binding_0)),
+ Type::Path(_binding_0) => Type::Path(f.fold_type_path(_binding_0)),
+ Type::Ptr(_binding_0) => Type::Ptr(f.fold_type_ptr(_binding_0)),
+ Type::Reference(_binding_0) => Type::Reference(f.fold_type_reference(_binding_0)),
+ Type::Slice(_binding_0) => Type::Slice(f.fold_type_slice(_binding_0)),
+ Type::TraitObject(_binding_0) => {
+ Type::TraitObject(f.fold_type_trait_object(_binding_0))
+ }
+ Type::Tuple(_binding_0) => Type::Tuple(f.fold_type_tuple(_binding_0)),
+ Type::Verbatim(_binding_0) => Type::Verbatim(_binding_0),
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_array<F>(f: &mut F, node: TypeArray) -> TypeArray
+where
+ F: Fold + ?Sized,
+{
+ TypeArray {
+ bracket_token: Bracket(tokens_helper(f, &node.bracket_token.span)),
+ elem: Box::new(f.fold_type(*node.elem)),
+ semi_token: Token![;](tokens_helper(f, &node.semi_token.spans)),
+ len: f.fold_expr(node.len),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_bare_fn<F>(f: &mut F, node: TypeBareFn) -> TypeBareFn
+where
+ F: Fold + ?Sized,
+{
+ TypeBareFn {
+ lifetimes: (node.lifetimes).map(|it| f.fold_bound_lifetimes(it)),
+ unsafety: (node.unsafety).map(|it| Token![unsafe](tokens_helper(f, &it.span))),
+ abi: (node.abi).map(|it| f.fold_abi(it)),
+ fn_token: Token![fn](tokens_helper(f, &node.fn_token.span)),
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ inputs: FoldHelper::lift(node.inputs, |it| f.fold_bare_fn_arg(it)),
+ variadic: (node.variadic).map(|it| f.fold_variadic(it)),
+ output: f.fold_return_type(node.output),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_group<F>(f: &mut F, node: TypeGroup) -> TypeGroup
+where
+ F: Fold + ?Sized,
+{
+ TypeGroup {
+ group_token: Group(tokens_helper(f, &node.group_token.span)),
+ elem: Box::new(f.fold_type(*node.elem)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_impl_trait<F>(f: &mut F, node: TypeImplTrait) -> TypeImplTrait
+where
+ F: Fold + ?Sized,
+{
+ TypeImplTrait {
+ impl_token: Token![impl](tokens_helper(f, &node.impl_token.span)),
+ bounds: FoldHelper::lift(node.bounds, |it| f.fold_type_param_bound(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_infer<F>(f: &mut F, node: TypeInfer) -> TypeInfer
+where
+ F: Fold + ?Sized,
+{
+ TypeInfer {
+ underscore_token: Token![_](tokens_helper(f, &node.underscore_token.spans)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_macro<F>(f: &mut F, node: TypeMacro) -> TypeMacro
+where
+ F: Fold + ?Sized,
+{
+ TypeMacro {
+ mac: f.fold_macro(node.mac),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_never<F>(f: &mut F, node: TypeNever) -> TypeNever
+where
+ F: Fold + ?Sized,
+{
+ TypeNever {
+ bang_token: Token![!](tokens_helper(f, &node.bang_token.spans)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_param<F>(f: &mut F, node: TypeParam) -> TypeParam
+where
+ F: Fold + ?Sized,
+{
+ TypeParam {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ ident: f.fold_ident(node.ident),
+ colon_token: (node.colon_token).map(|it| Token![:](tokens_helper(f, &it.spans))),
+ bounds: FoldHelper::lift(node.bounds, |it| f.fold_type_param_bound(it)),
+ eq_token: (node.eq_token).map(|it| Token![=](tokens_helper(f, &it.spans))),
+ default: (node.default).map(|it| f.fold_type(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_param_bound<F>(f: &mut F, node: TypeParamBound) -> TypeParamBound
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ TypeParamBound::Trait(_binding_0) => {
+ TypeParamBound::Trait(f.fold_trait_bound(_binding_0))
+ }
+ TypeParamBound::Lifetime(_binding_0) => {
+ TypeParamBound::Lifetime(f.fold_lifetime(_binding_0))
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_paren<F>(f: &mut F, node: TypeParen) -> TypeParen
+where
+ F: Fold + ?Sized,
+{
+ TypeParen {
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ elem: Box::new(f.fold_type(*node.elem)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_path<F>(f: &mut F, node: TypePath) -> TypePath
+where
+ F: Fold + ?Sized,
+{
+ TypePath {
+ qself: (node.qself).map(|it| f.fold_qself(it)),
+ path: f.fold_path(node.path),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_ptr<F>(f: &mut F, node: TypePtr) -> TypePtr
+where
+ F: Fold + ?Sized,
+{
+ TypePtr {
+ star_token: Token![*](tokens_helper(f, &node.star_token.spans)),
+ const_token: (node.const_token)
+ .map(|it| Token![const](tokens_helper(f, &it.span))),
+ mutability: (node.mutability).map(|it| Token![mut](tokens_helper(f, &it.span))),
+ elem: Box::new(f.fold_type(*node.elem)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_reference<F>(f: &mut F, node: TypeReference) -> TypeReference
+where
+ F: Fold + ?Sized,
+{
+ TypeReference {
+ and_token: Token![&](tokens_helper(f, &node.and_token.spans)),
+ lifetime: (node.lifetime).map(|it| f.fold_lifetime(it)),
+ mutability: (node.mutability).map(|it| Token![mut](tokens_helper(f, &it.span))),
+ elem: Box::new(f.fold_type(*node.elem)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_slice<F>(f: &mut F, node: TypeSlice) -> TypeSlice
+where
+ F: Fold + ?Sized,
+{
+ TypeSlice {
+ bracket_token: Bracket(tokens_helper(f, &node.bracket_token.span)),
+ elem: Box::new(f.fold_type(*node.elem)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_trait_object<F>(f: &mut F, node: TypeTraitObject) -> TypeTraitObject
+where
+ F: Fold + ?Sized,
+{
+ TypeTraitObject {
+ dyn_token: (node.dyn_token).map(|it| Token![dyn](tokens_helper(f, &it.span))),
+ bounds: FoldHelper::lift(node.bounds, |it| f.fold_type_param_bound(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_type_tuple<F>(f: &mut F, node: TypeTuple) -> TypeTuple
+where
+ F: Fold + ?Sized,
+{
+ TypeTuple {
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ elems: FoldHelper::lift(node.elems, |it| f.fold_type(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_un_op<F>(f: &mut F, node: UnOp) -> UnOp
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ UnOp::Deref(_binding_0) => {
+ UnOp::Deref(Token![*](tokens_helper(f, &_binding_0.spans)))
+ }
+ UnOp::Not(_binding_0) => {
+ UnOp::Not(Token![!](tokens_helper(f, &_binding_0.spans)))
+ }
+ UnOp::Neg(_binding_0) => {
+ UnOp::Neg(Token![-](tokens_helper(f, &_binding_0.spans)))
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_use_glob<F>(f: &mut F, node: UseGlob) -> UseGlob
+where
+ F: Fold + ?Sized,
+{
+ UseGlob {
+ star_token: Token![*](tokens_helper(f, &node.star_token.spans)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_use_group<F>(f: &mut F, node: UseGroup) -> UseGroup
+where
+ F: Fold + ?Sized,
+{
+ UseGroup {
+ brace_token: Brace(tokens_helper(f, &node.brace_token.span)),
+ items: FoldHelper::lift(node.items, |it| f.fold_use_tree(it)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_use_name<F>(f: &mut F, node: UseName) -> UseName
+where
+ F: Fold + ?Sized,
+{
+ UseName {
+ ident: f.fold_ident(node.ident),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_use_path<F>(f: &mut F, node: UsePath) -> UsePath
+where
+ F: Fold + ?Sized,
+{
+ UsePath {
+ ident: f.fold_ident(node.ident),
+ colon2_token: Token![::](tokens_helper(f, &node.colon2_token.spans)),
+ tree: Box::new(f.fold_use_tree(*node.tree)),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_use_rename<F>(f: &mut F, node: UseRename) -> UseRename
+where
+ F: Fold + ?Sized,
+{
+ UseRename {
+ ident: f.fold_ident(node.ident),
+ as_token: Token![as](tokens_helper(f, &node.as_token.span)),
+ rename: f.fold_ident(node.rename),
+ }
+}
+#[cfg(feature = "full")]
+pub fn fold_use_tree<F>(f: &mut F, node: UseTree) -> UseTree
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ UseTree::Path(_binding_0) => UseTree::Path(f.fold_use_path(_binding_0)),
+ UseTree::Name(_binding_0) => UseTree::Name(f.fold_use_name(_binding_0)),
+ UseTree::Rename(_binding_0) => UseTree::Rename(f.fold_use_rename(_binding_0)),
+ UseTree::Glob(_binding_0) => UseTree::Glob(f.fold_use_glob(_binding_0)),
+ UseTree::Group(_binding_0) => UseTree::Group(f.fold_use_group(_binding_0)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_variadic<F>(f: &mut F, node: Variadic) -> Variadic
+where
+ F: Fold + ?Sized,
+{
+ Variadic {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ dots: Token![...](tokens_helper(f, &node.dots.spans)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_variant<F>(f: &mut F, node: Variant) -> Variant
+where
+ F: Fold + ?Sized,
+{
+ Variant {
+ attrs: FoldHelper::lift(node.attrs, |it| f.fold_attribute(it)),
+ ident: f.fold_ident(node.ident),
+ fields: f.fold_fields(node.fields),
+ discriminant: (node.discriminant)
+ .map(|it| (Token![=](tokens_helper(f, &(it).0.spans)), f.fold_expr((it).1))),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_vis_crate<F>(f: &mut F, node: VisCrate) -> VisCrate
+where
+ F: Fold + ?Sized,
+{
+ VisCrate {
+ crate_token: Token![crate](tokens_helper(f, &node.crate_token.span)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_vis_public<F>(f: &mut F, node: VisPublic) -> VisPublic
+where
+ F: Fold + ?Sized,
+{
+ VisPublic {
+ pub_token: Token![pub](tokens_helper(f, &node.pub_token.span)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_vis_restricted<F>(f: &mut F, node: VisRestricted) -> VisRestricted
+where
+ F: Fold + ?Sized,
+{
+ VisRestricted {
+ pub_token: Token![pub](tokens_helper(f, &node.pub_token.span)),
+ paren_token: Paren(tokens_helper(f, &node.paren_token.span)),
+ in_token: (node.in_token).map(|it| Token![in](tokens_helper(f, &it.span))),
+ path: Box::new(f.fold_path(*node.path)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_visibility<F>(f: &mut F, node: Visibility) -> Visibility
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ Visibility::Public(_binding_0) => {
+ Visibility::Public(f.fold_vis_public(_binding_0))
+ }
+ Visibility::Crate(_binding_0) => Visibility::Crate(f.fold_vis_crate(_binding_0)),
+ Visibility::Restricted(_binding_0) => {
+ Visibility::Restricted(f.fold_vis_restricted(_binding_0))
+ }
+ Visibility::Inherited => Visibility::Inherited,
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_where_clause<F>(f: &mut F, node: WhereClause) -> WhereClause
+where
+ F: Fold + ?Sized,
+{
+ WhereClause {
+ where_token: Token![where](tokens_helper(f, &node.where_token.span)),
+ predicates: FoldHelper::lift(node.predicates, |it| f.fold_where_predicate(it)),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn fold_where_predicate<F>(f: &mut F, node: WherePredicate) -> WherePredicate
+where
+ F: Fold + ?Sized,
+{
+ match node {
+ WherePredicate::Type(_binding_0) => {
+ WherePredicate::Type(f.fold_predicate_type(_binding_0))
+ }
+ WherePredicate::Lifetime(_binding_0) => {
+ WherePredicate::Lifetime(f.fold_predicate_lifetime(_binding_0))
+ }
+ WherePredicate::Eq(_binding_0) => {
+ WherePredicate::Eq(f.fold_predicate_eq(_binding_0))
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/gen/hash.rs b/third_party/rust/syn/src/gen/hash.rs
new file mode 100644
index 0000000000..d0400e19d6
--- /dev/null
+++ b/third_party/rust/syn/src/gen/hash.rs
@@ -0,0 +1,2869 @@
+// This file is @generated by syn-internal-codegen.
+// It is not intended for manual editing.
+
+#[cfg(any(feature = "derive", feature = "full"))]
+use crate::tt::TokenStreamHelper;
+use crate::*;
+use std::hash::{Hash, Hasher};
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Abi {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.name.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for AngleBracketedGenericArguments {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.colon2_token.hash(state);
+ self.args.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Arm {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.pat.hash(state);
+ self.guard.hash(state);
+ self.body.hash(state);
+ self.comma.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for AttrStyle {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ AttrStyle::Outer => {
+ state.write_u8(0u8);
+ }
+ AttrStyle::Inner(_) => {
+ state.write_u8(1u8);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Attribute {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.style.hash(state);
+ self.path.hash(state);
+ TokenStreamHelper(&self.tokens).hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for BareFnArg {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.name.hash(state);
+ self.ty.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for BinOp {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ BinOp::Add(_) => {
+ state.write_u8(0u8);
+ }
+ BinOp::Sub(_) => {
+ state.write_u8(1u8);
+ }
+ BinOp::Mul(_) => {
+ state.write_u8(2u8);
+ }
+ BinOp::Div(_) => {
+ state.write_u8(3u8);
+ }
+ BinOp::Rem(_) => {
+ state.write_u8(4u8);
+ }
+ BinOp::And(_) => {
+ state.write_u8(5u8);
+ }
+ BinOp::Or(_) => {
+ state.write_u8(6u8);
+ }
+ BinOp::BitXor(_) => {
+ state.write_u8(7u8);
+ }
+ BinOp::BitAnd(_) => {
+ state.write_u8(8u8);
+ }
+ BinOp::BitOr(_) => {
+ state.write_u8(9u8);
+ }
+ BinOp::Shl(_) => {
+ state.write_u8(10u8);
+ }
+ BinOp::Shr(_) => {
+ state.write_u8(11u8);
+ }
+ BinOp::Eq(_) => {
+ state.write_u8(12u8);
+ }
+ BinOp::Lt(_) => {
+ state.write_u8(13u8);
+ }
+ BinOp::Le(_) => {
+ state.write_u8(14u8);
+ }
+ BinOp::Ne(_) => {
+ state.write_u8(15u8);
+ }
+ BinOp::Ge(_) => {
+ state.write_u8(16u8);
+ }
+ BinOp::Gt(_) => {
+ state.write_u8(17u8);
+ }
+ BinOp::AddEq(_) => {
+ state.write_u8(18u8);
+ }
+ BinOp::SubEq(_) => {
+ state.write_u8(19u8);
+ }
+ BinOp::MulEq(_) => {
+ state.write_u8(20u8);
+ }
+ BinOp::DivEq(_) => {
+ state.write_u8(21u8);
+ }
+ BinOp::RemEq(_) => {
+ state.write_u8(22u8);
+ }
+ BinOp::BitXorEq(_) => {
+ state.write_u8(23u8);
+ }
+ BinOp::BitAndEq(_) => {
+ state.write_u8(24u8);
+ }
+ BinOp::BitOrEq(_) => {
+ state.write_u8(25u8);
+ }
+ BinOp::ShlEq(_) => {
+ state.write_u8(26u8);
+ }
+ BinOp::ShrEq(_) => {
+ state.write_u8(27u8);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Binding {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.ident.hash(state);
+ self.ty.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Block {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.stmts.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for BoundLifetimes {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.lifetimes.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ConstParam {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.ident.hash(state);
+ self.ty.hash(state);
+ self.eq_token.hash(state);
+ self.default.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Constraint {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.ident.hash(state);
+ self.bounds.hash(state);
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Data {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ Data::Struct(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ Data::Enum(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ Data::Union(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for DataEnum {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.variants.hash(state);
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for DataStruct {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.fields.hash(state);
+ self.semi_token.hash(state);
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for DataUnion {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.fields.hash(state);
+ }
+}
+#[cfg(feature = "derive")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for DeriveInput {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ self.generics.hash(state);
+ self.data.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Expr {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ #[cfg(feature = "full")]
+ Expr::Array(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Assign(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::AssignOp(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Async(v0) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Await(v0) => {
+ state.write_u8(4u8);
+ v0.hash(state);
+ }
+ Expr::Binary(v0) => {
+ state.write_u8(5u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Block(v0) => {
+ state.write_u8(6u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Box(v0) => {
+ state.write_u8(7u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Break(v0) => {
+ state.write_u8(8u8);
+ v0.hash(state);
+ }
+ Expr::Call(v0) => {
+ state.write_u8(9u8);
+ v0.hash(state);
+ }
+ Expr::Cast(v0) => {
+ state.write_u8(10u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Closure(v0) => {
+ state.write_u8(11u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Continue(v0) => {
+ state.write_u8(12u8);
+ v0.hash(state);
+ }
+ Expr::Field(v0) => {
+ state.write_u8(13u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::ForLoop(v0) => {
+ state.write_u8(14u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Group(v0) => {
+ state.write_u8(15u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::If(v0) => {
+ state.write_u8(16u8);
+ v0.hash(state);
+ }
+ Expr::Index(v0) => {
+ state.write_u8(17u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Let(v0) => {
+ state.write_u8(18u8);
+ v0.hash(state);
+ }
+ Expr::Lit(v0) => {
+ state.write_u8(19u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Loop(v0) => {
+ state.write_u8(20u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Macro(v0) => {
+ state.write_u8(21u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Match(v0) => {
+ state.write_u8(22u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::MethodCall(v0) => {
+ state.write_u8(23u8);
+ v0.hash(state);
+ }
+ Expr::Paren(v0) => {
+ state.write_u8(24u8);
+ v0.hash(state);
+ }
+ Expr::Path(v0) => {
+ state.write_u8(25u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Range(v0) => {
+ state.write_u8(26u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Reference(v0) => {
+ state.write_u8(27u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Repeat(v0) => {
+ state.write_u8(28u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Return(v0) => {
+ state.write_u8(29u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Struct(v0) => {
+ state.write_u8(30u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Try(v0) => {
+ state.write_u8(31u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::TryBlock(v0) => {
+ state.write_u8(32u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Tuple(v0) => {
+ state.write_u8(33u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Type(v0) => {
+ state.write_u8(34u8);
+ v0.hash(state);
+ }
+ Expr::Unary(v0) => {
+ state.write_u8(35u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Unsafe(v0) => {
+ state.write_u8(36u8);
+ v0.hash(state);
+ }
+ Expr::Verbatim(v0) => {
+ state.write_u8(37u8);
+ TokenStreamHelper(v0).hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::While(v0) => {
+ state.write_u8(38u8);
+ v0.hash(state);
+ }
+ #[cfg(feature = "full")]
+ Expr::Yield(v0) => {
+ state.write_u8(39u8);
+ v0.hash(state);
+ }
+ #[cfg(any(syn_no_non_exhaustive, not(feature = "full")))]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprArray {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.elems.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprAssign {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.left.hash(state);
+ self.right.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprAssignOp {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.left.hash(state);
+ self.op.hash(state);
+ self.right.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprAsync {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.capture.hash(state);
+ self.block.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprAwait {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.base.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprBinary {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.left.hash(state);
+ self.op.hash(state);
+ self.right.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprBlock {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.label.hash(state);
+ self.block.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprBox {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprBreak {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.label.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprCall {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.func.hash(state);
+ self.args.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprCast {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ self.ty.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprClosure {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.movability.hash(state);
+ self.asyncness.hash(state);
+ self.capture.hash(state);
+ self.inputs.hash(state);
+ self.output.hash(state);
+ self.body.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprContinue {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.label.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprField {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.base.hash(state);
+ self.member.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprForLoop {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.label.hash(state);
+ self.pat.hash(state);
+ self.expr.hash(state);
+ self.body.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprGroup {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprIf {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.cond.hash(state);
+ self.then_branch.hash(state);
+ self.else_branch.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprIndex {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ self.index.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprLet {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.pat.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprLit {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.lit.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprLoop {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.label.hash(state);
+ self.body.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprMacro {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.mac.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprMatch {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ self.arms.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprMethodCall {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.receiver.hash(state);
+ self.method.hash(state);
+ self.turbofish.hash(state);
+ self.args.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprParen {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprPath {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.qself.hash(state);
+ self.path.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprRange {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.from.hash(state);
+ self.limits.hash(state);
+ self.to.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprReference {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.mutability.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprRepeat {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ self.len.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprReturn {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprStruct {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.path.hash(state);
+ self.fields.hash(state);
+ self.dot2_token.hash(state);
+ self.rest.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprTry {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprTryBlock {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.block.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprTuple {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.elems.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprType {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ self.ty.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprUnary {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.op.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprUnsafe {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.block.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprWhile {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.label.hash(state);
+ self.cond.hash(state);
+ self.body.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ExprYield {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Field {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ self.colon_token.hash(state);
+ self.ty.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for FieldPat {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.member.hash(state);
+ self.colon_token.hash(state);
+ self.pat.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for FieldValue {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.member.hash(state);
+ self.colon_token.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Fields {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ Fields::Named(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ Fields::Unnamed(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ Fields::Unit => {
+ state.write_u8(2u8);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for FieldsNamed {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.named.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for FieldsUnnamed {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.unnamed.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for File {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.shebang.hash(state);
+ self.attrs.hash(state);
+ self.items.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for FnArg {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ FnArg::Receiver(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ FnArg::Typed(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ForeignItem {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ ForeignItem::Fn(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ ForeignItem::Static(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ ForeignItem::Type(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ ForeignItem::Macro(v0) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ ForeignItem::Verbatim(v0) => {
+ state.write_u8(4u8);
+ TokenStreamHelper(v0).hash(state);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ForeignItemFn {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.sig.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ForeignItemMacro {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.mac.hash(state);
+ self.semi_token.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ForeignItemStatic {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.mutability.hash(state);
+ self.ident.hash(state);
+ self.ty.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ForeignItemType {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for GenericArgument {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ GenericArgument::Lifetime(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ GenericArgument::Type(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ GenericArgument::Const(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ GenericArgument::Binding(v0) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ GenericArgument::Constraint(v0) => {
+ state.write_u8(4u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for GenericMethodArgument {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ GenericMethodArgument::Type(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ GenericMethodArgument::Const(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for GenericParam {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ GenericParam::Type(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ GenericParam::Lifetime(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ GenericParam::Const(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Generics {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.lt_token.hash(state);
+ self.params.hash(state);
+ self.gt_token.hash(state);
+ self.where_clause.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ImplItem {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ ImplItem::Const(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ ImplItem::Method(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ ImplItem::Type(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ ImplItem::Macro(v0) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ ImplItem::Verbatim(v0) => {
+ state.write_u8(4u8);
+ TokenStreamHelper(v0).hash(state);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ImplItemConst {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.defaultness.hash(state);
+ self.ident.hash(state);
+ self.ty.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ImplItemMacro {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.mac.hash(state);
+ self.semi_token.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ImplItemMethod {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.defaultness.hash(state);
+ self.sig.hash(state);
+ self.block.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ImplItemType {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.defaultness.hash(state);
+ self.ident.hash(state);
+ self.generics.hash(state);
+ self.ty.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Item {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ Item::Const(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ Item::Enum(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ Item::ExternCrate(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ Item::Fn(v0) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ Item::ForeignMod(v0) => {
+ state.write_u8(4u8);
+ v0.hash(state);
+ }
+ Item::Impl(v0) => {
+ state.write_u8(5u8);
+ v0.hash(state);
+ }
+ Item::Macro(v0) => {
+ state.write_u8(6u8);
+ v0.hash(state);
+ }
+ Item::Macro2(v0) => {
+ state.write_u8(7u8);
+ v0.hash(state);
+ }
+ Item::Mod(v0) => {
+ state.write_u8(8u8);
+ v0.hash(state);
+ }
+ Item::Static(v0) => {
+ state.write_u8(9u8);
+ v0.hash(state);
+ }
+ Item::Struct(v0) => {
+ state.write_u8(10u8);
+ v0.hash(state);
+ }
+ Item::Trait(v0) => {
+ state.write_u8(11u8);
+ v0.hash(state);
+ }
+ Item::TraitAlias(v0) => {
+ state.write_u8(12u8);
+ v0.hash(state);
+ }
+ Item::Type(v0) => {
+ state.write_u8(13u8);
+ v0.hash(state);
+ }
+ Item::Union(v0) => {
+ state.write_u8(14u8);
+ v0.hash(state);
+ }
+ Item::Use(v0) => {
+ state.write_u8(15u8);
+ v0.hash(state);
+ }
+ Item::Verbatim(v0) => {
+ state.write_u8(16u8);
+ TokenStreamHelper(v0).hash(state);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemConst {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ self.ty.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemEnum {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ self.generics.hash(state);
+ self.variants.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemExternCrate {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ self.rename.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemFn {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.sig.hash(state);
+ self.block.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemForeignMod {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.abi.hash(state);
+ self.items.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemImpl {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.defaultness.hash(state);
+ self.unsafety.hash(state);
+ self.generics.hash(state);
+ self.trait_.hash(state);
+ self.self_ty.hash(state);
+ self.items.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemMacro {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.ident.hash(state);
+ self.mac.hash(state);
+ self.semi_token.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemMacro2 {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ TokenStreamHelper(&self.rules).hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemMod {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ self.content.hash(state);
+ self.semi.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemStatic {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.mutability.hash(state);
+ self.ident.hash(state);
+ self.ty.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemStruct {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ self.generics.hash(state);
+ self.fields.hash(state);
+ self.semi_token.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemTrait {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.unsafety.hash(state);
+ self.auto_token.hash(state);
+ self.ident.hash(state);
+ self.generics.hash(state);
+ self.colon_token.hash(state);
+ self.supertraits.hash(state);
+ self.items.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemTraitAlias {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ self.generics.hash(state);
+ self.bounds.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemType {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ self.generics.hash(state);
+ self.ty.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemUnion {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.ident.hash(state);
+ self.generics.hash(state);
+ self.fields.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ItemUse {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.vis.hash(state);
+ self.leading_colon.hash(state);
+ self.tree.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Label {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.name.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for LifetimeDef {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.lifetime.hash(state);
+ self.colon_token.hash(state);
+ self.bounds.hash(state);
+ }
+}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Lit {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ Lit::Str(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ Lit::ByteStr(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ Lit::Byte(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ Lit::Char(v0) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ Lit::Int(v0) => {
+ state.write_u8(4u8);
+ v0.hash(state);
+ }
+ Lit::Float(v0) => {
+ state.write_u8(5u8);
+ v0.hash(state);
+ }
+ Lit::Bool(v0) => {
+ state.write_u8(6u8);
+ v0.hash(state);
+ }
+ Lit::Verbatim(v0) => {
+ state.write_u8(7u8);
+ v0.to_string().hash(state);
+ }
+ }
+ }
+}
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for LitBool {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.value.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Local {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.pat.hash(state);
+ self.init.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Macro {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.path.hash(state);
+ self.delimiter.hash(state);
+ TokenStreamHelper(&self.tokens).hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for MacroDelimiter {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ MacroDelimiter::Paren(_) => {
+ state.write_u8(0u8);
+ }
+ MacroDelimiter::Brace(_) => {
+ state.write_u8(1u8);
+ }
+ MacroDelimiter::Bracket(_) => {
+ state.write_u8(2u8);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Meta {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ Meta::Path(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ Meta::List(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ Meta::NameValue(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for MetaList {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.path.hash(state);
+ self.nested.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for MetaNameValue {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.path.hash(state);
+ self.lit.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for MethodTurbofish {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.args.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for NestedMeta {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ NestedMeta::Meta(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ NestedMeta::Lit(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ParenthesizedGenericArguments {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.inputs.hash(state);
+ self.output.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Pat {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ Pat::Box(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ Pat::Ident(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ Pat::Lit(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ Pat::Macro(v0) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ Pat::Or(v0) => {
+ state.write_u8(4u8);
+ v0.hash(state);
+ }
+ Pat::Path(v0) => {
+ state.write_u8(5u8);
+ v0.hash(state);
+ }
+ Pat::Range(v0) => {
+ state.write_u8(6u8);
+ v0.hash(state);
+ }
+ Pat::Reference(v0) => {
+ state.write_u8(7u8);
+ v0.hash(state);
+ }
+ Pat::Rest(v0) => {
+ state.write_u8(8u8);
+ v0.hash(state);
+ }
+ Pat::Slice(v0) => {
+ state.write_u8(9u8);
+ v0.hash(state);
+ }
+ Pat::Struct(v0) => {
+ state.write_u8(10u8);
+ v0.hash(state);
+ }
+ Pat::Tuple(v0) => {
+ state.write_u8(11u8);
+ v0.hash(state);
+ }
+ Pat::TupleStruct(v0) => {
+ state.write_u8(12u8);
+ v0.hash(state);
+ }
+ Pat::Type(v0) => {
+ state.write_u8(13u8);
+ v0.hash(state);
+ }
+ Pat::Verbatim(v0) => {
+ state.write_u8(14u8);
+ TokenStreamHelper(v0).hash(state);
+ }
+ Pat::Wild(v0) => {
+ state.write_u8(15u8);
+ v0.hash(state);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatBox {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.pat.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatIdent {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.by_ref.hash(state);
+ self.mutability.hash(state);
+ self.ident.hash(state);
+ self.subpat.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatLit {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.expr.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatMacro {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.mac.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatOr {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.leading_vert.hash(state);
+ self.cases.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatPath {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.qself.hash(state);
+ self.path.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatRange {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.lo.hash(state);
+ self.limits.hash(state);
+ self.hi.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatReference {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.mutability.hash(state);
+ self.pat.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatRest {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatSlice {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.elems.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatStruct {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.path.hash(state);
+ self.fields.hash(state);
+ self.dot2_token.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatTuple {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.elems.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatTupleStruct {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.path.hash(state);
+ self.pat.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatType {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.pat.hash(state);
+ self.ty.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PatWild {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Path {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.leading_colon.hash(state);
+ self.segments.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PathArguments {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ PathArguments::None => {
+ state.write_u8(0u8);
+ }
+ PathArguments::AngleBracketed(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ PathArguments::Parenthesized(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PathSegment {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.ident.hash(state);
+ self.arguments.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PredicateEq {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.lhs_ty.hash(state);
+ self.rhs_ty.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PredicateLifetime {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.lifetime.hash(state);
+ self.bounds.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for PredicateType {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.lifetimes.hash(state);
+ self.bounded_ty.hash(state);
+ self.bounds.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for QSelf {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.ty.hash(state);
+ self.position.hash(state);
+ self.as_token.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for RangeLimits {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ RangeLimits::HalfOpen(_) => {
+ state.write_u8(0u8);
+ }
+ RangeLimits::Closed(_) => {
+ state.write_u8(1u8);
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Receiver {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.reference.hash(state);
+ self.mutability.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for ReturnType {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ ReturnType::Default => {
+ state.write_u8(0u8);
+ }
+ ReturnType::Type(_, v1) => {
+ state.write_u8(1u8);
+ v1.hash(state);
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Signature {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.constness.hash(state);
+ self.asyncness.hash(state);
+ self.unsafety.hash(state);
+ self.abi.hash(state);
+ self.ident.hash(state);
+ self.generics.hash(state);
+ self.inputs.hash(state);
+ self.variadic.hash(state);
+ self.output.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Stmt {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ Stmt::Local(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ Stmt::Item(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ Stmt::Expr(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ Stmt::Semi(v0, _) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TraitBound {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.paren_token.hash(state);
+ self.modifier.hash(state);
+ self.lifetimes.hash(state);
+ self.path.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TraitBoundModifier {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ TraitBoundModifier::None => {
+ state.write_u8(0u8);
+ }
+ TraitBoundModifier::Maybe(_) => {
+ state.write_u8(1u8);
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TraitItem {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ TraitItem::Const(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ TraitItem::Method(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ TraitItem::Type(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ TraitItem::Macro(v0) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ TraitItem::Verbatim(v0) => {
+ state.write_u8(4u8);
+ TokenStreamHelper(v0).hash(state);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TraitItemConst {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.ident.hash(state);
+ self.ty.hash(state);
+ self.default.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TraitItemMacro {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.mac.hash(state);
+ self.semi_token.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TraitItemMethod {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.sig.hash(state);
+ self.default.hash(state);
+ self.semi_token.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TraitItemType {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.ident.hash(state);
+ self.generics.hash(state);
+ self.colon_token.hash(state);
+ self.bounds.hash(state);
+ self.default.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Type {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ Type::Array(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ Type::BareFn(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ Type::Group(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ Type::ImplTrait(v0) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ Type::Infer(v0) => {
+ state.write_u8(4u8);
+ v0.hash(state);
+ }
+ Type::Macro(v0) => {
+ state.write_u8(5u8);
+ v0.hash(state);
+ }
+ Type::Never(v0) => {
+ state.write_u8(6u8);
+ v0.hash(state);
+ }
+ Type::Paren(v0) => {
+ state.write_u8(7u8);
+ v0.hash(state);
+ }
+ Type::Path(v0) => {
+ state.write_u8(8u8);
+ v0.hash(state);
+ }
+ Type::Ptr(v0) => {
+ state.write_u8(9u8);
+ v0.hash(state);
+ }
+ Type::Reference(v0) => {
+ state.write_u8(10u8);
+ v0.hash(state);
+ }
+ Type::Slice(v0) => {
+ state.write_u8(11u8);
+ v0.hash(state);
+ }
+ Type::TraitObject(v0) => {
+ state.write_u8(12u8);
+ v0.hash(state);
+ }
+ Type::Tuple(v0) => {
+ state.write_u8(13u8);
+ v0.hash(state);
+ }
+ Type::Verbatim(v0) => {
+ state.write_u8(14u8);
+ TokenStreamHelper(v0).hash(state);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeArray {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.elem.hash(state);
+ self.len.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeBareFn {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.lifetimes.hash(state);
+ self.unsafety.hash(state);
+ self.abi.hash(state);
+ self.inputs.hash(state);
+ self.variadic.hash(state);
+ self.output.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeGroup {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.elem.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeImplTrait {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.bounds.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeInfer {
+ fn hash<H>(&self, _state: &mut H)
+ where
+ H: Hasher,
+ {}
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeMacro {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.mac.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeNever {
+ fn hash<H>(&self, _state: &mut H)
+ where
+ H: Hasher,
+ {}
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeParam {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.ident.hash(state);
+ self.colon_token.hash(state);
+ self.bounds.hash(state);
+ self.eq_token.hash(state);
+ self.default.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeParamBound {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ TypeParamBound::Trait(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ TypeParamBound::Lifetime(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeParen {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.elem.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypePath {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.qself.hash(state);
+ self.path.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypePtr {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.const_token.hash(state);
+ self.mutability.hash(state);
+ self.elem.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeReference {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.lifetime.hash(state);
+ self.mutability.hash(state);
+ self.elem.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeSlice {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.elem.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeTraitObject {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.dyn_token.hash(state);
+ self.bounds.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for TypeTuple {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.elems.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for UnOp {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ UnOp::Deref(_) => {
+ state.write_u8(0u8);
+ }
+ UnOp::Not(_) => {
+ state.write_u8(1u8);
+ }
+ UnOp::Neg(_) => {
+ state.write_u8(2u8);
+ }
+ }
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for UseGlob {
+ fn hash<H>(&self, _state: &mut H)
+ where
+ H: Hasher,
+ {}
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for UseGroup {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.items.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for UseName {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.ident.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for UsePath {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.ident.hash(state);
+ self.tree.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for UseRename {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.ident.hash(state);
+ self.rename.hash(state);
+ }
+}
+#[cfg(feature = "full")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for UseTree {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ UseTree::Path(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ UseTree::Name(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ UseTree::Rename(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ UseTree::Glob(v0) => {
+ state.write_u8(3u8);
+ v0.hash(state);
+ }
+ UseTree::Group(v0) => {
+ state.write_u8(4u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Variadic {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Variant {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.attrs.hash(state);
+ self.ident.hash(state);
+ self.fields.hash(state);
+ self.discriminant.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for VisCrate {
+ fn hash<H>(&self, _state: &mut H)
+ where
+ H: Hasher,
+ {}
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for VisPublic {
+ fn hash<H>(&self, _state: &mut H)
+ where
+ H: Hasher,
+ {}
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for VisRestricted {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.in_token.hash(state);
+ self.path.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Visibility {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ Visibility::Public(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ Visibility::Crate(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ Visibility::Restricted(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ Visibility::Inherited => {
+ state.write_u8(3u8);
+ }
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for WhereClause {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.predicates.hash(state);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for WherePredicate {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ match self {
+ WherePredicate::Type(v0) => {
+ state.write_u8(0u8);
+ v0.hash(state);
+ }
+ WherePredicate::Lifetime(v0) => {
+ state.write_u8(1u8);
+ v0.hash(state);
+ }
+ WherePredicate::Eq(v0) => {
+ state.write_u8(2u8);
+ v0.hash(state);
+ }
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/gen/visit.rs b/third_party/rust/syn/src/gen/visit.rs
new file mode 100644
index 0000000000..19ddd2e726
--- /dev/null
+++ b/third_party/rust/syn/src/gen/visit.rs
@@ -0,0 +1,3786 @@
+// This file is @generated by syn-internal-codegen.
+// It is not intended for manual editing.
+
+#![allow(unused_variables)]
+#[cfg(any(feature = "full", feature = "derive"))]
+use crate::gen::helper::visit::*;
+#[cfg(any(feature = "full", feature = "derive"))]
+use crate::punctuated::Punctuated;
+use crate::*;
+use proc_macro2::Span;
+#[cfg(feature = "full")]
+macro_rules! full {
+ ($e:expr) => {
+ $e
+ };
+}
+#[cfg(all(feature = "derive", not(feature = "full")))]
+macro_rules! full {
+ ($e:expr) => {
+ unreachable!()
+ };
+}
+macro_rules! skip {
+ ($($tt:tt)*) => {};
+}
+/// Syntax tree traversal to walk a shared borrow of a syntax tree.
+///
+/// See the [module documentation] for details.
+///
+/// [module documentation]: self
+///
+/// *This trait is available only if Syn is built with the `"visit"` feature.*
+pub trait Visit<'ast> {
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_abi(&mut self, i: &'ast Abi) {
+ visit_abi(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_angle_bracketed_generic_arguments(
+ &mut self,
+ i: &'ast AngleBracketedGenericArguments,
+ ) {
+ visit_angle_bracketed_generic_arguments(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_arm(&mut self, i: &'ast Arm) {
+ visit_arm(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_attr_style(&mut self, i: &'ast AttrStyle) {
+ visit_attr_style(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_attribute(&mut self, i: &'ast Attribute) {
+ visit_attribute(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_bare_fn_arg(&mut self, i: &'ast BareFnArg) {
+ visit_bare_fn_arg(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_bin_op(&mut self, i: &'ast BinOp) {
+ visit_bin_op(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_binding(&mut self, i: &'ast Binding) {
+ visit_binding(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_block(&mut self, i: &'ast Block) {
+ visit_block(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_bound_lifetimes(&mut self, i: &'ast BoundLifetimes) {
+ visit_bound_lifetimes(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_const_param(&mut self, i: &'ast ConstParam) {
+ visit_const_param(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_constraint(&mut self, i: &'ast Constraint) {
+ visit_constraint(self, i);
+ }
+ #[cfg(feature = "derive")]
+ fn visit_data(&mut self, i: &'ast Data) {
+ visit_data(self, i);
+ }
+ #[cfg(feature = "derive")]
+ fn visit_data_enum(&mut self, i: &'ast DataEnum) {
+ visit_data_enum(self, i);
+ }
+ #[cfg(feature = "derive")]
+ fn visit_data_struct(&mut self, i: &'ast DataStruct) {
+ visit_data_struct(self, i);
+ }
+ #[cfg(feature = "derive")]
+ fn visit_data_union(&mut self, i: &'ast DataUnion) {
+ visit_data_union(self, i);
+ }
+ #[cfg(feature = "derive")]
+ fn visit_derive_input(&mut self, i: &'ast DeriveInput) {
+ visit_derive_input(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr(&mut self, i: &'ast Expr) {
+ visit_expr(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_array(&mut self, i: &'ast ExprArray) {
+ visit_expr_array(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_assign(&mut self, i: &'ast ExprAssign) {
+ visit_expr_assign(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_assign_op(&mut self, i: &'ast ExprAssignOp) {
+ visit_expr_assign_op(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_async(&mut self, i: &'ast ExprAsync) {
+ visit_expr_async(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_await(&mut self, i: &'ast ExprAwait) {
+ visit_expr_await(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_binary(&mut self, i: &'ast ExprBinary) {
+ visit_expr_binary(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_block(&mut self, i: &'ast ExprBlock) {
+ visit_expr_block(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_box(&mut self, i: &'ast ExprBox) {
+ visit_expr_box(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_break(&mut self, i: &'ast ExprBreak) {
+ visit_expr_break(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_call(&mut self, i: &'ast ExprCall) {
+ visit_expr_call(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_cast(&mut self, i: &'ast ExprCast) {
+ visit_expr_cast(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_closure(&mut self, i: &'ast ExprClosure) {
+ visit_expr_closure(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_continue(&mut self, i: &'ast ExprContinue) {
+ visit_expr_continue(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_field(&mut self, i: &'ast ExprField) {
+ visit_expr_field(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_for_loop(&mut self, i: &'ast ExprForLoop) {
+ visit_expr_for_loop(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_group(&mut self, i: &'ast ExprGroup) {
+ visit_expr_group(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_if(&mut self, i: &'ast ExprIf) {
+ visit_expr_if(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_index(&mut self, i: &'ast ExprIndex) {
+ visit_expr_index(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_let(&mut self, i: &'ast ExprLet) {
+ visit_expr_let(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_lit(&mut self, i: &'ast ExprLit) {
+ visit_expr_lit(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_loop(&mut self, i: &'ast ExprLoop) {
+ visit_expr_loop(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_macro(&mut self, i: &'ast ExprMacro) {
+ visit_expr_macro(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_match(&mut self, i: &'ast ExprMatch) {
+ visit_expr_match(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_method_call(&mut self, i: &'ast ExprMethodCall) {
+ visit_expr_method_call(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_paren(&mut self, i: &'ast ExprParen) {
+ visit_expr_paren(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_path(&mut self, i: &'ast ExprPath) {
+ visit_expr_path(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_range(&mut self, i: &'ast ExprRange) {
+ visit_expr_range(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_reference(&mut self, i: &'ast ExprReference) {
+ visit_expr_reference(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_repeat(&mut self, i: &'ast ExprRepeat) {
+ visit_expr_repeat(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_return(&mut self, i: &'ast ExprReturn) {
+ visit_expr_return(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_struct(&mut self, i: &'ast ExprStruct) {
+ visit_expr_struct(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_try(&mut self, i: &'ast ExprTry) {
+ visit_expr_try(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_try_block(&mut self, i: &'ast ExprTryBlock) {
+ visit_expr_try_block(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_tuple(&mut self, i: &'ast ExprTuple) {
+ visit_expr_tuple(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_type(&mut self, i: &'ast ExprType) {
+ visit_expr_type(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_unary(&mut self, i: &'ast ExprUnary) {
+ visit_expr_unary(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_unsafe(&mut self, i: &'ast ExprUnsafe) {
+ visit_expr_unsafe(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_while(&mut self, i: &'ast ExprWhile) {
+ visit_expr_while(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_yield(&mut self, i: &'ast ExprYield) {
+ visit_expr_yield(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_field(&mut self, i: &'ast Field) {
+ visit_field(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_field_pat(&mut self, i: &'ast FieldPat) {
+ visit_field_pat(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_field_value(&mut self, i: &'ast FieldValue) {
+ visit_field_value(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_fields(&mut self, i: &'ast Fields) {
+ visit_fields(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_fields_named(&mut self, i: &'ast FieldsNamed) {
+ visit_fields_named(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_fields_unnamed(&mut self, i: &'ast FieldsUnnamed) {
+ visit_fields_unnamed(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_file(&mut self, i: &'ast File) {
+ visit_file(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_fn_arg(&mut self, i: &'ast FnArg) {
+ visit_fn_arg(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_foreign_item(&mut self, i: &'ast ForeignItem) {
+ visit_foreign_item(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_foreign_item_fn(&mut self, i: &'ast ForeignItemFn) {
+ visit_foreign_item_fn(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_foreign_item_macro(&mut self, i: &'ast ForeignItemMacro) {
+ visit_foreign_item_macro(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_foreign_item_static(&mut self, i: &'ast ForeignItemStatic) {
+ visit_foreign_item_static(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_foreign_item_type(&mut self, i: &'ast ForeignItemType) {
+ visit_foreign_item_type(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_generic_argument(&mut self, i: &'ast GenericArgument) {
+ visit_generic_argument(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_generic_method_argument(&mut self, i: &'ast GenericMethodArgument) {
+ visit_generic_method_argument(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_generic_param(&mut self, i: &'ast GenericParam) {
+ visit_generic_param(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_generics(&mut self, i: &'ast Generics) {
+ visit_generics(self, i);
+ }
+ fn visit_ident(&mut self, i: &'ast Ident) {
+ visit_ident(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_impl_item(&mut self, i: &'ast ImplItem) {
+ visit_impl_item(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_impl_item_const(&mut self, i: &'ast ImplItemConst) {
+ visit_impl_item_const(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_impl_item_macro(&mut self, i: &'ast ImplItemMacro) {
+ visit_impl_item_macro(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_impl_item_method(&mut self, i: &'ast ImplItemMethod) {
+ visit_impl_item_method(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_impl_item_type(&mut self, i: &'ast ImplItemType) {
+ visit_impl_item_type(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_index(&mut self, i: &'ast Index) {
+ visit_index(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item(&mut self, i: &'ast Item) {
+ visit_item(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_const(&mut self, i: &'ast ItemConst) {
+ visit_item_const(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_enum(&mut self, i: &'ast ItemEnum) {
+ visit_item_enum(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_extern_crate(&mut self, i: &'ast ItemExternCrate) {
+ visit_item_extern_crate(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_fn(&mut self, i: &'ast ItemFn) {
+ visit_item_fn(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_foreign_mod(&mut self, i: &'ast ItemForeignMod) {
+ visit_item_foreign_mod(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_impl(&mut self, i: &'ast ItemImpl) {
+ visit_item_impl(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_macro(&mut self, i: &'ast ItemMacro) {
+ visit_item_macro(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_macro2(&mut self, i: &'ast ItemMacro2) {
+ visit_item_macro2(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_mod(&mut self, i: &'ast ItemMod) {
+ visit_item_mod(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_static(&mut self, i: &'ast ItemStatic) {
+ visit_item_static(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_struct(&mut self, i: &'ast ItemStruct) {
+ visit_item_struct(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_trait(&mut self, i: &'ast ItemTrait) {
+ visit_item_trait(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_trait_alias(&mut self, i: &'ast ItemTraitAlias) {
+ visit_item_trait_alias(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_type(&mut self, i: &'ast ItemType) {
+ visit_item_type(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_union(&mut self, i: &'ast ItemUnion) {
+ visit_item_union(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_use(&mut self, i: &'ast ItemUse) {
+ visit_item_use(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_label(&mut self, i: &'ast Label) {
+ visit_label(self, i);
+ }
+ fn visit_lifetime(&mut self, i: &'ast Lifetime) {
+ visit_lifetime(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_lifetime_def(&mut self, i: &'ast LifetimeDef) {
+ visit_lifetime_def(self, i);
+ }
+ fn visit_lit(&mut self, i: &'ast Lit) {
+ visit_lit(self, i);
+ }
+ fn visit_lit_bool(&mut self, i: &'ast LitBool) {
+ visit_lit_bool(self, i);
+ }
+ fn visit_lit_byte(&mut self, i: &'ast LitByte) {
+ visit_lit_byte(self, i);
+ }
+ fn visit_lit_byte_str(&mut self, i: &'ast LitByteStr) {
+ visit_lit_byte_str(self, i);
+ }
+ fn visit_lit_char(&mut self, i: &'ast LitChar) {
+ visit_lit_char(self, i);
+ }
+ fn visit_lit_float(&mut self, i: &'ast LitFloat) {
+ visit_lit_float(self, i);
+ }
+ fn visit_lit_int(&mut self, i: &'ast LitInt) {
+ visit_lit_int(self, i);
+ }
+ fn visit_lit_str(&mut self, i: &'ast LitStr) {
+ visit_lit_str(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_local(&mut self, i: &'ast Local) {
+ visit_local(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_macro(&mut self, i: &'ast Macro) {
+ visit_macro(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_macro_delimiter(&mut self, i: &'ast MacroDelimiter) {
+ visit_macro_delimiter(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_member(&mut self, i: &'ast Member) {
+ visit_member(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_meta(&mut self, i: &'ast Meta) {
+ visit_meta(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_meta_list(&mut self, i: &'ast MetaList) {
+ visit_meta_list(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_meta_name_value(&mut self, i: &'ast MetaNameValue) {
+ visit_meta_name_value(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_method_turbofish(&mut self, i: &'ast MethodTurbofish) {
+ visit_method_turbofish(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_nested_meta(&mut self, i: &'ast NestedMeta) {
+ visit_nested_meta(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_parenthesized_generic_arguments(
+ &mut self,
+ i: &'ast ParenthesizedGenericArguments,
+ ) {
+ visit_parenthesized_generic_arguments(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat(&mut self, i: &'ast Pat) {
+ visit_pat(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_box(&mut self, i: &'ast PatBox) {
+ visit_pat_box(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_ident(&mut self, i: &'ast PatIdent) {
+ visit_pat_ident(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_lit(&mut self, i: &'ast PatLit) {
+ visit_pat_lit(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_macro(&mut self, i: &'ast PatMacro) {
+ visit_pat_macro(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_or(&mut self, i: &'ast PatOr) {
+ visit_pat_or(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_path(&mut self, i: &'ast PatPath) {
+ visit_pat_path(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_range(&mut self, i: &'ast PatRange) {
+ visit_pat_range(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_reference(&mut self, i: &'ast PatReference) {
+ visit_pat_reference(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_rest(&mut self, i: &'ast PatRest) {
+ visit_pat_rest(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_slice(&mut self, i: &'ast PatSlice) {
+ visit_pat_slice(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_struct(&mut self, i: &'ast PatStruct) {
+ visit_pat_struct(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_tuple(&mut self, i: &'ast PatTuple) {
+ visit_pat_tuple(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_tuple_struct(&mut self, i: &'ast PatTupleStruct) {
+ visit_pat_tuple_struct(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_type(&mut self, i: &'ast PatType) {
+ visit_pat_type(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_wild(&mut self, i: &'ast PatWild) {
+ visit_pat_wild(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_path(&mut self, i: &'ast Path) {
+ visit_path(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_path_arguments(&mut self, i: &'ast PathArguments) {
+ visit_path_arguments(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_path_segment(&mut self, i: &'ast PathSegment) {
+ visit_path_segment(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_predicate_eq(&mut self, i: &'ast PredicateEq) {
+ visit_predicate_eq(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_predicate_lifetime(&mut self, i: &'ast PredicateLifetime) {
+ visit_predicate_lifetime(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_predicate_type(&mut self, i: &'ast PredicateType) {
+ visit_predicate_type(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_qself(&mut self, i: &'ast QSelf) {
+ visit_qself(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_range_limits(&mut self, i: &'ast RangeLimits) {
+ visit_range_limits(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_receiver(&mut self, i: &'ast Receiver) {
+ visit_receiver(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_return_type(&mut self, i: &'ast ReturnType) {
+ visit_return_type(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_signature(&mut self, i: &'ast Signature) {
+ visit_signature(self, i);
+ }
+ fn visit_span(&mut self, i: &Span) {
+ visit_span(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_stmt(&mut self, i: &'ast Stmt) {
+ visit_stmt(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_trait_bound(&mut self, i: &'ast TraitBound) {
+ visit_trait_bound(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_trait_bound_modifier(&mut self, i: &'ast TraitBoundModifier) {
+ visit_trait_bound_modifier(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_trait_item(&mut self, i: &'ast TraitItem) {
+ visit_trait_item(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_trait_item_const(&mut self, i: &'ast TraitItemConst) {
+ visit_trait_item_const(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_trait_item_macro(&mut self, i: &'ast TraitItemMacro) {
+ visit_trait_item_macro(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_trait_item_method(&mut self, i: &'ast TraitItemMethod) {
+ visit_trait_item_method(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_trait_item_type(&mut self, i: &'ast TraitItemType) {
+ visit_trait_item_type(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type(&mut self, i: &'ast Type) {
+ visit_type(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_array(&mut self, i: &'ast TypeArray) {
+ visit_type_array(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_bare_fn(&mut self, i: &'ast TypeBareFn) {
+ visit_type_bare_fn(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_group(&mut self, i: &'ast TypeGroup) {
+ visit_type_group(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_impl_trait(&mut self, i: &'ast TypeImplTrait) {
+ visit_type_impl_trait(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_infer(&mut self, i: &'ast TypeInfer) {
+ visit_type_infer(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_macro(&mut self, i: &'ast TypeMacro) {
+ visit_type_macro(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_never(&mut self, i: &'ast TypeNever) {
+ visit_type_never(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_param(&mut self, i: &'ast TypeParam) {
+ visit_type_param(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_param_bound(&mut self, i: &'ast TypeParamBound) {
+ visit_type_param_bound(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_paren(&mut self, i: &'ast TypeParen) {
+ visit_type_paren(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_path(&mut self, i: &'ast TypePath) {
+ visit_type_path(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_ptr(&mut self, i: &'ast TypePtr) {
+ visit_type_ptr(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_reference(&mut self, i: &'ast TypeReference) {
+ visit_type_reference(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_slice(&mut self, i: &'ast TypeSlice) {
+ visit_type_slice(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_trait_object(&mut self, i: &'ast TypeTraitObject) {
+ visit_type_trait_object(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_tuple(&mut self, i: &'ast TypeTuple) {
+ visit_type_tuple(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_un_op(&mut self, i: &'ast UnOp) {
+ visit_un_op(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_glob(&mut self, i: &'ast UseGlob) {
+ visit_use_glob(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_group(&mut self, i: &'ast UseGroup) {
+ visit_use_group(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_name(&mut self, i: &'ast UseName) {
+ visit_use_name(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_path(&mut self, i: &'ast UsePath) {
+ visit_use_path(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_rename(&mut self, i: &'ast UseRename) {
+ visit_use_rename(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_tree(&mut self, i: &'ast UseTree) {
+ visit_use_tree(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_variadic(&mut self, i: &'ast Variadic) {
+ visit_variadic(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_variant(&mut self, i: &'ast Variant) {
+ visit_variant(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_vis_crate(&mut self, i: &'ast VisCrate) {
+ visit_vis_crate(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_vis_public(&mut self, i: &'ast VisPublic) {
+ visit_vis_public(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_vis_restricted(&mut self, i: &'ast VisRestricted) {
+ visit_vis_restricted(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_visibility(&mut self, i: &'ast Visibility) {
+ visit_visibility(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_where_clause(&mut self, i: &'ast WhereClause) {
+ visit_where_clause(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_where_predicate(&mut self, i: &'ast WherePredicate) {
+ visit_where_predicate(self, i);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_abi<'ast, V>(v: &mut V, node: &'ast Abi)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.extern_token.span);
+ if let Some(it) = &node.name {
+ v.visit_lit_str(it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_angle_bracketed_generic_arguments<'ast, V>(
+ v: &mut V,
+ node: &'ast AngleBracketedGenericArguments,
+)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ if let Some(it) = &node.colon2_token {
+ tokens_helper(v, &it.spans);
+ }
+ tokens_helper(v, &node.lt_token.spans);
+ for el in Punctuated::pairs(&node.args) {
+ let (it, p) = el.into_tuple();
+ v.visit_generic_argument(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ tokens_helper(v, &node.gt_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_arm<'ast, V>(v: &mut V, node: &'ast Arm)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_pat(&node.pat);
+ if let Some(it) = &node.guard {
+ tokens_helper(v, &(it).0.span);
+ v.visit_expr(&*(it).1);
+ }
+ tokens_helper(v, &node.fat_arrow_token.spans);
+ v.visit_expr(&*node.body);
+ if let Some(it) = &node.comma {
+ tokens_helper(v, &it.spans);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_attr_style<'ast, V>(v: &mut V, node: &'ast AttrStyle)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ AttrStyle::Outer => {}
+ AttrStyle::Inner(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_attribute<'ast, V>(v: &mut V, node: &'ast Attribute)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.pound_token.spans);
+ v.visit_attr_style(&node.style);
+ tokens_helper(v, &node.bracket_token.span);
+ v.visit_path(&node.path);
+ skip!(node.tokens);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_bare_fn_arg<'ast, V>(v: &mut V, node: &'ast BareFnArg)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.name {
+ v.visit_ident(&(it).0);
+ tokens_helper(v, &(it).1.spans);
+ }
+ v.visit_type(&node.ty);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_bin_op<'ast, V>(v: &mut V, node: &'ast BinOp)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ BinOp::Add(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Sub(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Mul(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Div(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Rem(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::And(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Or(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::BitXor(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::BitAnd(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::BitOr(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Shl(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Shr(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Eq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Lt(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Le(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Ne(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Ge(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::Gt(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::AddEq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::SubEq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::MulEq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::DivEq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::RemEq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::BitXorEq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::BitAndEq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::BitOrEq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::ShlEq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ BinOp::ShrEq(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_binding<'ast, V>(v: &mut V, node: &'ast Binding)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.eq_token.spans);
+ v.visit_type(&node.ty);
+}
+#[cfg(feature = "full")]
+pub fn visit_block<'ast, V>(v: &mut V, node: &'ast Block)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.brace_token.span);
+ for it in &node.stmts {
+ v.visit_stmt(it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_bound_lifetimes<'ast, V>(v: &mut V, node: &'ast BoundLifetimes)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.for_token.span);
+ tokens_helper(v, &node.lt_token.spans);
+ for el in Punctuated::pairs(&node.lifetimes) {
+ let (it, p) = el.into_tuple();
+ v.visit_lifetime_def(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ tokens_helper(v, &node.gt_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_const_param<'ast, V>(v: &mut V, node: &'ast ConstParam)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.const_token.span);
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.colon_token.spans);
+ v.visit_type(&node.ty);
+ if let Some(it) = &node.eq_token {
+ tokens_helper(v, &it.spans);
+ }
+ if let Some(it) = &node.default {
+ v.visit_expr(it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_constraint<'ast, V>(v: &mut V, node: &'ast Constraint)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.colon_token.spans);
+ for el in Punctuated::pairs(&node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(feature = "derive")]
+pub fn visit_data<'ast, V>(v: &mut V, node: &'ast Data)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Data::Struct(_binding_0) => {
+ v.visit_data_struct(_binding_0);
+ }
+ Data::Enum(_binding_0) => {
+ v.visit_data_enum(_binding_0);
+ }
+ Data::Union(_binding_0) => {
+ v.visit_data_union(_binding_0);
+ }
+ }
+}
+#[cfg(feature = "derive")]
+pub fn visit_data_enum<'ast, V>(v: &mut V, node: &'ast DataEnum)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.enum_token.span);
+ tokens_helper(v, &node.brace_token.span);
+ for el in Punctuated::pairs(&node.variants) {
+ let (it, p) = el.into_tuple();
+ v.visit_variant(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(feature = "derive")]
+pub fn visit_data_struct<'ast, V>(v: &mut V, node: &'ast DataStruct)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.struct_token.span);
+ v.visit_fields(&node.fields);
+ if let Some(it) = &node.semi_token {
+ tokens_helper(v, &it.spans);
+ }
+}
+#[cfg(feature = "derive")]
+pub fn visit_data_union<'ast, V>(v: &mut V, node: &'ast DataUnion)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.union_token.span);
+ v.visit_fields_named(&node.fields);
+}
+#[cfg(feature = "derive")]
+pub fn visit_derive_input<'ast, V>(v: &mut V, node: &'ast DeriveInput)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ v.visit_ident(&node.ident);
+ v.visit_generics(&node.generics);
+ v.visit_data(&node.data);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr<'ast, V>(v: &mut V, node: &'ast Expr)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Expr::Array(_binding_0) => {
+ full!(v.visit_expr_array(_binding_0));
+ }
+ Expr::Assign(_binding_0) => {
+ full!(v.visit_expr_assign(_binding_0));
+ }
+ Expr::AssignOp(_binding_0) => {
+ full!(v.visit_expr_assign_op(_binding_0));
+ }
+ Expr::Async(_binding_0) => {
+ full!(v.visit_expr_async(_binding_0));
+ }
+ Expr::Await(_binding_0) => {
+ full!(v.visit_expr_await(_binding_0));
+ }
+ Expr::Binary(_binding_0) => {
+ v.visit_expr_binary(_binding_0);
+ }
+ Expr::Block(_binding_0) => {
+ full!(v.visit_expr_block(_binding_0));
+ }
+ Expr::Box(_binding_0) => {
+ full!(v.visit_expr_box(_binding_0));
+ }
+ Expr::Break(_binding_0) => {
+ full!(v.visit_expr_break(_binding_0));
+ }
+ Expr::Call(_binding_0) => {
+ v.visit_expr_call(_binding_0);
+ }
+ Expr::Cast(_binding_0) => {
+ v.visit_expr_cast(_binding_0);
+ }
+ Expr::Closure(_binding_0) => {
+ full!(v.visit_expr_closure(_binding_0));
+ }
+ Expr::Continue(_binding_0) => {
+ full!(v.visit_expr_continue(_binding_0));
+ }
+ Expr::Field(_binding_0) => {
+ v.visit_expr_field(_binding_0);
+ }
+ Expr::ForLoop(_binding_0) => {
+ full!(v.visit_expr_for_loop(_binding_0));
+ }
+ Expr::Group(_binding_0) => {
+ full!(v.visit_expr_group(_binding_0));
+ }
+ Expr::If(_binding_0) => {
+ full!(v.visit_expr_if(_binding_0));
+ }
+ Expr::Index(_binding_0) => {
+ v.visit_expr_index(_binding_0);
+ }
+ Expr::Let(_binding_0) => {
+ full!(v.visit_expr_let(_binding_0));
+ }
+ Expr::Lit(_binding_0) => {
+ v.visit_expr_lit(_binding_0);
+ }
+ Expr::Loop(_binding_0) => {
+ full!(v.visit_expr_loop(_binding_0));
+ }
+ Expr::Macro(_binding_0) => {
+ full!(v.visit_expr_macro(_binding_0));
+ }
+ Expr::Match(_binding_0) => {
+ full!(v.visit_expr_match(_binding_0));
+ }
+ Expr::MethodCall(_binding_0) => {
+ full!(v.visit_expr_method_call(_binding_0));
+ }
+ Expr::Paren(_binding_0) => {
+ v.visit_expr_paren(_binding_0);
+ }
+ Expr::Path(_binding_0) => {
+ v.visit_expr_path(_binding_0);
+ }
+ Expr::Range(_binding_0) => {
+ full!(v.visit_expr_range(_binding_0));
+ }
+ Expr::Reference(_binding_0) => {
+ full!(v.visit_expr_reference(_binding_0));
+ }
+ Expr::Repeat(_binding_0) => {
+ full!(v.visit_expr_repeat(_binding_0));
+ }
+ Expr::Return(_binding_0) => {
+ full!(v.visit_expr_return(_binding_0));
+ }
+ Expr::Struct(_binding_0) => {
+ full!(v.visit_expr_struct(_binding_0));
+ }
+ Expr::Try(_binding_0) => {
+ full!(v.visit_expr_try(_binding_0));
+ }
+ Expr::TryBlock(_binding_0) => {
+ full!(v.visit_expr_try_block(_binding_0));
+ }
+ Expr::Tuple(_binding_0) => {
+ full!(v.visit_expr_tuple(_binding_0));
+ }
+ Expr::Type(_binding_0) => {
+ full!(v.visit_expr_type(_binding_0));
+ }
+ Expr::Unary(_binding_0) => {
+ v.visit_expr_unary(_binding_0);
+ }
+ Expr::Unsafe(_binding_0) => {
+ full!(v.visit_expr_unsafe(_binding_0));
+ }
+ Expr::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ Expr::While(_binding_0) => {
+ full!(v.visit_expr_while(_binding_0));
+ }
+ Expr::Yield(_binding_0) => {
+ full!(v.visit_expr_yield(_binding_0));
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_array<'ast, V>(v: &mut V, node: &'ast ExprArray)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.bracket_token.span);
+ for el in Punctuated::pairs(&node.elems) {
+ let (it, p) = el.into_tuple();
+ v.visit_expr(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_assign<'ast, V>(v: &mut V, node: &'ast ExprAssign)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.left);
+ tokens_helper(v, &node.eq_token.spans);
+ v.visit_expr(&*node.right);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_assign_op<'ast, V>(v: &mut V, node: &'ast ExprAssignOp)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.left);
+ v.visit_bin_op(&node.op);
+ v.visit_expr(&*node.right);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_async<'ast, V>(v: &mut V, node: &'ast ExprAsync)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.async_token.span);
+ if let Some(it) = &node.capture {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_block(&node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_await<'ast, V>(v: &mut V, node: &'ast ExprAwait)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.base);
+ tokens_helper(v, &node.dot_token.spans);
+ tokens_helper(v, &node.await_token.span);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_binary<'ast, V>(v: &mut V, node: &'ast ExprBinary)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.left);
+ v.visit_bin_op(&node.op);
+ v.visit_expr(&*node.right);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_block<'ast, V>(v: &mut V, node: &'ast ExprBlock)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.label {
+ v.visit_label(it);
+ }
+ v.visit_block(&node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_box<'ast, V>(v: &mut V, node: &'ast ExprBox)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.box_token.span);
+ v.visit_expr(&*node.expr);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_break<'ast, V>(v: &mut V, node: &'ast ExprBreak)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.break_token.span);
+ if let Some(it) = &node.label {
+ v.visit_lifetime(it);
+ }
+ if let Some(it) = &node.expr {
+ v.visit_expr(&**it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_call<'ast, V>(v: &mut V, node: &'ast ExprCall)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.func);
+ tokens_helper(v, &node.paren_token.span);
+ for el in Punctuated::pairs(&node.args) {
+ let (it, p) = el.into_tuple();
+ v.visit_expr(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_cast<'ast, V>(v: &mut V, node: &'ast ExprCast)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.expr);
+ tokens_helper(v, &node.as_token.span);
+ v.visit_type(&*node.ty);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_closure<'ast, V>(v: &mut V, node: &'ast ExprClosure)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.movability {
+ tokens_helper(v, &it.span);
+ }
+ if let Some(it) = &node.asyncness {
+ tokens_helper(v, &it.span);
+ }
+ if let Some(it) = &node.capture {
+ tokens_helper(v, &it.span);
+ }
+ tokens_helper(v, &node.or1_token.spans);
+ for el in Punctuated::pairs(&node.inputs) {
+ let (it, p) = el.into_tuple();
+ v.visit_pat(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ tokens_helper(v, &node.or2_token.spans);
+ v.visit_return_type(&node.output);
+ v.visit_expr(&*node.body);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_continue<'ast, V>(v: &mut V, node: &'ast ExprContinue)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.continue_token.span);
+ if let Some(it) = &node.label {
+ v.visit_lifetime(it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_field<'ast, V>(v: &mut V, node: &'ast ExprField)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.base);
+ tokens_helper(v, &node.dot_token.spans);
+ v.visit_member(&node.member);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_for_loop<'ast, V>(v: &mut V, node: &'ast ExprForLoop)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.label {
+ v.visit_label(it);
+ }
+ tokens_helper(v, &node.for_token.span);
+ v.visit_pat(&node.pat);
+ tokens_helper(v, &node.in_token.span);
+ v.visit_expr(&*node.expr);
+ v.visit_block(&node.body);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_group<'ast, V>(v: &mut V, node: &'ast ExprGroup)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.group_token.span);
+ v.visit_expr(&*node.expr);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_if<'ast, V>(v: &mut V, node: &'ast ExprIf)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.if_token.span);
+ v.visit_expr(&*node.cond);
+ v.visit_block(&node.then_branch);
+ if let Some(it) = &node.else_branch {
+ tokens_helper(v, &(it).0.span);
+ v.visit_expr(&*(it).1);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_index<'ast, V>(v: &mut V, node: &'ast ExprIndex)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.expr);
+ tokens_helper(v, &node.bracket_token.span);
+ v.visit_expr(&*node.index);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_let<'ast, V>(v: &mut V, node: &'ast ExprLet)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.let_token.span);
+ v.visit_pat(&node.pat);
+ tokens_helper(v, &node.eq_token.spans);
+ v.visit_expr(&*node.expr);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_lit<'ast, V>(v: &mut V, node: &'ast ExprLit)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_lit(&node.lit);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_loop<'ast, V>(v: &mut V, node: &'ast ExprLoop)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.label {
+ v.visit_label(it);
+ }
+ tokens_helper(v, &node.loop_token.span);
+ v.visit_block(&node.body);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_macro<'ast, V>(v: &mut V, node: &'ast ExprMacro)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_macro(&node.mac);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_match<'ast, V>(v: &mut V, node: &'ast ExprMatch)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.match_token.span);
+ v.visit_expr(&*node.expr);
+ tokens_helper(v, &node.brace_token.span);
+ for it in &node.arms {
+ v.visit_arm(it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_method_call<'ast, V>(v: &mut V, node: &'ast ExprMethodCall)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.receiver);
+ tokens_helper(v, &node.dot_token.spans);
+ v.visit_ident(&node.method);
+ if let Some(it) = &node.turbofish {
+ v.visit_method_turbofish(it);
+ }
+ tokens_helper(v, &node.paren_token.span);
+ for el in Punctuated::pairs(&node.args) {
+ let (it, p) = el.into_tuple();
+ v.visit_expr(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_paren<'ast, V>(v: &mut V, node: &'ast ExprParen)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.paren_token.span);
+ v.visit_expr(&*node.expr);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_path<'ast, V>(v: &mut V, node: &'ast ExprPath)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.qself {
+ v.visit_qself(it);
+ }
+ v.visit_path(&node.path);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_range<'ast, V>(v: &mut V, node: &'ast ExprRange)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.from {
+ v.visit_expr(&**it);
+ }
+ v.visit_range_limits(&node.limits);
+ if let Some(it) = &node.to {
+ v.visit_expr(&**it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_reference<'ast, V>(v: &mut V, node: &'ast ExprReference)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.and_token.spans);
+ if let Some(it) = &node.mutability {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_expr(&*node.expr);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_repeat<'ast, V>(v: &mut V, node: &'ast ExprRepeat)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.bracket_token.span);
+ v.visit_expr(&*node.expr);
+ tokens_helper(v, &node.semi_token.spans);
+ v.visit_expr(&*node.len);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_return<'ast, V>(v: &mut V, node: &'ast ExprReturn)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.return_token.span);
+ if let Some(it) = &node.expr {
+ v.visit_expr(&**it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_struct<'ast, V>(v: &mut V, node: &'ast ExprStruct)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_path(&node.path);
+ tokens_helper(v, &node.brace_token.span);
+ for el in Punctuated::pairs(&node.fields) {
+ let (it, p) = el.into_tuple();
+ v.visit_field_value(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ if let Some(it) = &node.dot2_token {
+ tokens_helper(v, &it.spans);
+ }
+ if let Some(it) = &node.rest {
+ v.visit_expr(&**it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_try<'ast, V>(v: &mut V, node: &'ast ExprTry)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.expr);
+ tokens_helper(v, &node.question_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_try_block<'ast, V>(v: &mut V, node: &'ast ExprTryBlock)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.try_token.span);
+ v.visit_block(&node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_tuple<'ast, V>(v: &mut V, node: &'ast ExprTuple)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.paren_token.span);
+ for el in Punctuated::pairs(&node.elems) {
+ let (it, p) = el.into_tuple();
+ v.visit_expr(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_type<'ast, V>(v: &mut V, node: &'ast ExprType)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.expr);
+ tokens_helper(v, &node.colon_token.spans);
+ v.visit_type(&*node.ty);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_unary<'ast, V>(v: &mut V, node: &'ast ExprUnary)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_un_op(&node.op);
+ v.visit_expr(&*node.expr);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_unsafe<'ast, V>(v: &mut V, node: &'ast ExprUnsafe)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.unsafe_token.span);
+ v.visit_block(&node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_while<'ast, V>(v: &mut V, node: &'ast ExprWhile)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.label {
+ v.visit_label(it);
+ }
+ tokens_helper(v, &node.while_token.span);
+ v.visit_expr(&*node.cond);
+ v.visit_block(&node.body);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_yield<'ast, V>(v: &mut V, node: &'ast ExprYield)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.yield_token.span);
+ if let Some(it) = &node.expr {
+ v.visit_expr(&**it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_field<'ast, V>(v: &mut V, node: &'ast Field)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ if let Some(it) = &node.ident {
+ v.visit_ident(it);
+ }
+ if let Some(it) = &node.colon_token {
+ tokens_helper(v, &it.spans);
+ }
+ v.visit_type(&node.ty);
+}
+#[cfg(feature = "full")]
+pub fn visit_field_pat<'ast, V>(v: &mut V, node: &'ast FieldPat)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_member(&node.member);
+ if let Some(it) = &node.colon_token {
+ tokens_helper(v, &it.spans);
+ }
+ v.visit_pat(&*node.pat);
+}
+#[cfg(feature = "full")]
+pub fn visit_field_value<'ast, V>(v: &mut V, node: &'ast FieldValue)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_member(&node.member);
+ if let Some(it) = &node.colon_token {
+ tokens_helper(v, &it.spans);
+ }
+ v.visit_expr(&node.expr);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_fields<'ast, V>(v: &mut V, node: &'ast Fields)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Fields::Named(_binding_0) => {
+ v.visit_fields_named(_binding_0);
+ }
+ Fields::Unnamed(_binding_0) => {
+ v.visit_fields_unnamed(_binding_0);
+ }
+ Fields::Unit => {}
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_fields_named<'ast, V>(v: &mut V, node: &'ast FieldsNamed)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.brace_token.span);
+ for el in Punctuated::pairs(&node.named) {
+ let (it, p) = el.into_tuple();
+ v.visit_field(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_fields_unnamed<'ast, V>(v: &mut V, node: &'ast FieldsUnnamed)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.paren_token.span);
+ for el in Punctuated::pairs(&node.unnamed) {
+ let (it, p) = el.into_tuple();
+ v.visit_field(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_file<'ast, V>(v: &mut V, node: &'ast File)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ skip!(node.shebang);
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ for it in &node.items {
+ v.visit_item(it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_fn_arg<'ast, V>(v: &mut V, node: &'ast FnArg)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ FnArg::Receiver(_binding_0) => {
+ v.visit_receiver(_binding_0);
+ }
+ FnArg::Typed(_binding_0) => {
+ v.visit_pat_type(_binding_0);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_foreign_item<'ast, V>(v: &mut V, node: &'ast ForeignItem)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ ForeignItem::Fn(_binding_0) => {
+ v.visit_foreign_item_fn(_binding_0);
+ }
+ ForeignItem::Static(_binding_0) => {
+ v.visit_foreign_item_static(_binding_0);
+ }
+ ForeignItem::Type(_binding_0) => {
+ v.visit_foreign_item_type(_binding_0);
+ }
+ ForeignItem::Macro(_binding_0) => {
+ v.visit_foreign_item_macro(_binding_0);
+ }
+ ForeignItem::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_foreign_item_fn<'ast, V>(v: &mut V, node: &'ast ForeignItemFn)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ v.visit_signature(&node.sig);
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_foreign_item_macro<'ast, V>(v: &mut V, node: &'ast ForeignItemMacro)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_macro(&node.mac);
+ if let Some(it) = &node.semi_token {
+ tokens_helper(v, &it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_foreign_item_static<'ast, V>(v: &mut V, node: &'ast ForeignItemStatic)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.static_token.span);
+ if let Some(it) = &node.mutability {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.colon_token.spans);
+ v.visit_type(&*node.ty);
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_foreign_item_type<'ast, V>(v: &mut V, node: &'ast ForeignItemType)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.type_token.span);
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_generic_argument<'ast, V>(v: &mut V, node: &'ast GenericArgument)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ GenericArgument::Lifetime(_binding_0) => {
+ v.visit_lifetime(_binding_0);
+ }
+ GenericArgument::Type(_binding_0) => {
+ v.visit_type(_binding_0);
+ }
+ GenericArgument::Const(_binding_0) => {
+ v.visit_expr(_binding_0);
+ }
+ GenericArgument::Binding(_binding_0) => {
+ v.visit_binding(_binding_0);
+ }
+ GenericArgument::Constraint(_binding_0) => {
+ v.visit_constraint(_binding_0);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_generic_method_argument<'ast, V>(
+ v: &mut V,
+ node: &'ast GenericMethodArgument,
+)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ GenericMethodArgument::Type(_binding_0) => {
+ v.visit_type(_binding_0);
+ }
+ GenericMethodArgument::Const(_binding_0) => {
+ v.visit_expr(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_generic_param<'ast, V>(v: &mut V, node: &'ast GenericParam)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ GenericParam::Type(_binding_0) => {
+ v.visit_type_param(_binding_0);
+ }
+ GenericParam::Lifetime(_binding_0) => {
+ v.visit_lifetime_def(_binding_0);
+ }
+ GenericParam::Const(_binding_0) => {
+ v.visit_const_param(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_generics<'ast, V>(v: &mut V, node: &'ast Generics)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ if let Some(it) = &node.lt_token {
+ tokens_helper(v, &it.spans);
+ }
+ for el in Punctuated::pairs(&node.params) {
+ let (it, p) = el.into_tuple();
+ v.visit_generic_param(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ if let Some(it) = &node.gt_token {
+ tokens_helper(v, &it.spans);
+ }
+ if let Some(it) = &node.where_clause {
+ v.visit_where_clause(it);
+ }
+}
+pub fn visit_ident<'ast, V>(v: &mut V, node: &'ast Ident)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_span(&node.span());
+}
+#[cfg(feature = "full")]
+pub fn visit_impl_item<'ast, V>(v: &mut V, node: &'ast ImplItem)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ ImplItem::Const(_binding_0) => {
+ v.visit_impl_item_const(_binding_0);
+ }
+ ImplItem::Method(_binding_0) => {
+ v.visit_impl_item_method(_binding_0);
+ }
+ ImplItem::Type(_binding_0) => {
+ v.visit_impl_item_type(_binding_0);
+ }
+ ImplItem::Macro(_binding_0) => {
+ v.visit_impl_item_macro(_binding_0);
+ }
+ ImplItem::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_impl_item_const<'ast, V>(v: &mut V, node: &'ast ImplItemConst)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ if let Some(it) = &node.defaultness {
+ tokens_helper(v, &it.span);
+ }
+ tokens_helper(v, &node.const_token.span);
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.colon_token.spans);
+ v.visit_type(&node.ty);
+ tokens_helper(v, &node.eq_token.spans);
+ v.visit_expr(&node.expr);
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_impl_item_macro<'ast, V>(v: &mut V, node: &'ast ImplItemMacro)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_macro(&node.mac);
+ if let Some(it) = &node.semi_token {
+ tokens_helper(v, &it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_impl_item_method<'ast, V>(v: &mut V, node: &'ast ImplItemMethod)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ if let Some(it) = &node.defaultness {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_signature(&node.sig);
+ v.visit_block(&node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_impl_item_type<'ast, V>(v: &mut V, node: &'ast ImplItemType)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ if let Some(it) = &node.defaultness {
+ tokens_helper(v, &it.span);
+ }
+ tokens_helper(v, &node.type_token.span);
+ v.visit_ident(&node.ident);
+ v.visit_generics(&node.generics);
+ tokens_helper(v, &node.eq_token.spans);
+ v.visit_type(&node.ty);
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_index<'ast, V>(v: &mut V, node: &'ast Index)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ skip!(node.index);
+ v.visit_span(&node.span);
+}
+#[cfg(feature = "full")]
+pub fn visit_item<'ast, V>(v: &mut V, node: &'ast Item)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Item::Const(_binding_0) => {
+ v.visit_item_const(_binding_0);
+ }
+ Item::Enum(_binding_0) => {
+ v.visit_item_enum(_binding_0);
+ }
+ Item::ExternCrate(_binding_0) => {
+ v.visit_item_extern_crate(_binding_0);
+ }
+ Item::Fn(_binding_0) => {
+ v.visit_item_fn(_binding_0);
+ }
+ Item::ForeignMod(_binding_0) => {
+ v.visit_item_foreign_mod(_binding_0);
+ }
+ Item::Impl(_binding_0) => {
+ v.visit_item_impl(_binding_0);
+ }
+ Item::Macro(_binding_0) => {
+ v.visit_item_macro(_binding_0);
+ }
+ Item::Macro2(_binding_0) => {
+ v.visit_item_macro2(_binding_0);
+ }
+ Item::Mod(_binding_0) => {
+ v.visit_item_mod(_binding_0);
+ }
+ Item::Static(_binding_0) => {
+ v.visit_item_static(_binding_0);
+ }
+ Item::Struct(_binding_0) => {
+ v.visit_item_struct(_binding_0);
+ }
+ Item::Trait(_binding_0) => {
+ v.visit_item_trait(_binding_0);
+ }
+ Item::TraitAlias(_binding_0) => {
+ v.visit_item_trait_alias(_binding_0);
+ }
+ Item::Type(_binding_0) => {
+ v.visit_item_type(_binding_0);
+ }
+ Item::Union(_binding_0) => {
+ v.visit_item_union(_binding_0);
+ }
+ Item::Use(_binding_0) => {
+ v.visit_item_use(_binding_0);
+ }
+ Item::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_const<'ast, V>(v: &mut V, node: &'ast ItemConst)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.const_token.span);
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.colon_token.spans);
+ v.visit_type(&*node.ty);
+ tokens_helper(v, &node.eq_token.spans);
+ v.visit_expr(&*node.expr);
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_enum<'ast, V>(v: &mut V, node: &'ast ItemEnum)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.enum_token.span);
+ v.visit_ident(&node.ident);
+ v.visit_generics(&node.generics);
+ tokens_helper(v, &node.brace_token.span);
+ for el in Punctuated::pairs(&node.variants) {
+ let (it, p) = el.into_tuple();
+ v.visit_variant(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_extern_crate<'ast, V>(v: &mut V, node: &'ast ItemExternCrate)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.extern_token.span);
+ tokens_helper(v, &node.crate_token.span);
+ v.visit_ident(&node.ident);
+ if let Some(it) = &node.rename {
+ tokens_helper(v, &(it).0.span);
+ v.visit_ident(&(it).1);
+ }
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_fn<'ast, V>(v: &mut V, node: &'ast ItemFn)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ v.visit_signature(&node.sig);
+ v.visit_block(&*node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_foreign_mod<'ast, V>(v: &mut V, node: &'ast ItemForeignMod)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_abi(&node.abi);
+ tokens_helper(v, &node.brace_token.span);
+ for it in &node.items {
+ v.visit_foreign_item(it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_impl<'ast, V>(v: &mut V, node: &'ast ItemImpl)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.defaultness {
+ tokens_helper(v, &it.span);
+ }
+ if let Some(it) = &node.unsafety {
+ tokens_helper(v, &it.span);
+ }
+ tokens_helper(v, &node.impl_token.span);
+ v.visit_generics(&node.generics);
+ if let Some(it) = &node.trait_ {
+ if let Some(it) = &(it).0 {
+ tokens_helper(v, &it.spans);
+ }
+ v.visit_path(&(it).1);
+ tokens_helper(v, &(it).2.span);
+ }
+ v.visit_type(&*node.self_ty);
+ tokens_helper(v, &node.brace_token.span);
+ for it in &node.items {
+ v.visit_impl_item(it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_macro<'ast, V>(v: &mut V, node: &'ast ItemMacro)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.ident {
+ v.visit_ident(it);
+ }
+ v.visit_macro(&node.mac);
+ if let Some(it) = &node.semi_token {
+ tokens_helper(v, &it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_macro2<'ast, V>(v: &mut V, node: &'ast ItemMacro2)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.macro_token.span);
+ v.visit_ident(&node.ident);
+ skip!(node.rules);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_mod<'ast, V>(v: &mut V, node: &'ast ItemMod)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.mod_token.span);
+ v.visit_ident(&node.ident);
+ if let Some(it) = &node.content {
+ tokens_helper(v, &(it).0.span);
+ for it in &(it).1 {
+ v.visit_item(it);
+ }
+ }
+ if let Some(it) = &node.semi {
+ tokens_helper(v, &it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_static<'ast, V>(v: &mut V, node: &'ast ItemStatic)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.static_token.span);
+ if let Some(it) = &node.mutability {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.colon_token.spans);
+ v.visit_type(&*node.ty);
+ tokens_helper(v, &node.eq_token.spans);
+ v.visit_expr(&*node.expr);
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_struct<'ast, V>(v: &mut V, node: &'ast ItemStruct)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.struct_token.span);
+ v.visit_ident(&node.ident);
+ v.visit_generics(&node.generics);
+ v.visit_fields(&node.fields);
+ if let Some(it) = &node.semi_token {
+ tokens_helper(v, &it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_trait<'ast, V>(v: &mut V, node: &'ast ItemTrait)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ if let Some(it) = &node.unsafety {
+ tokens_helper(v, &it.span);
+ }
+ if let Some(it) = &node.auto_token {
+ tokens_helper(v, &it.span);
+ }
+ tokens_helper(v, &node.trait_token.span);
+ v.visit_ident(&node.ident);
+ v.visit_generics(&node.generics);
+ if let Some(it) = &node.colon_token {
+ tokens_helper(v, &it.spans);
+ }
+ for el in Punctuated::pairs(&node.supertraits) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ tokens_helper(v, &node.brace_token.span);
+ for it in &node.items {
+ v.visit_trait_item(it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_trait_alias<'ast, V>(v: &mut V, node: &'ast ItemTraitAlias)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.trait_token.span);
+ v.visit_ident(&node.ident);
+ v.visit_generics(&node.generics);
+ tokens_helper(v, &node.eq_token.spans);
+ for el in Punctuated::pairs(&node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_type<'ast, V>(v: &mut V, node: &'ast ItemType)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.type_token.span);
+ v.visit_ident(&node.ident);
+ v.visit_generics(&node.generics);
+ tokens_helper(v, &node.eq_token.spans);
+ v.visit_type(&*node.ty);
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_union<'ast, V>(v: &mut V, node: &'ast ItemUnion)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.union_token.span);
+ v.visit_ident(&node.ident);
+ v.visit_generics(&node.generics);
+ v.visit_fields_named(&node.fields);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_use<'ast, V>(v: &mut V, node: &'ast ItemUse)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_visibility(&node.vis);
+ tokens_helper(v, &node.use_token.span);
+ if let Some(it) = &node.leading_colon {
+ tokens_helper(v, &it.spans);
+ }
+ v.visit_use_tree(&node.tree);
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_label<'ast, V>(v: &mut V, node: &'ast Label)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_lifetime(&node.name);
+ tokens_helper(v, &node.colon_token.spans);
+}
+pub fn visit_lifetime<'ast, V>(v: &mut V, node: &'ast Lifetime)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_span(&node.apostrophe);
+ v.visit_ident(&node.ident);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_lifetime_def<'ast, V>(v: &mut V, node: &'ast LifetimeDef)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_lifetime(&node.lifetime);
+ if let Some(it) = &node.colon_token {
+ tokens_helper(v, &it.spans);
+ }
+ for el in Punctuated::pairs(&node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_lifetime(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+pub fn visit_lit<'ast, V>(v: &mut V, node: &'ast Lit)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Lit::Str(_binding_0) => {
+ v.visit_lit_str(_binding_0);
+ }
+ Lit::ByteStr(_binding_0) => {
+ v.visit_lit_byte_str(_binding_0);
+ }
+ Lit::Byte(_binding_0) => {
+ v.visit_lit_byte(_binding_0);
+ }
+ Lit::Char(_binding_0) => {
+ v.visit_lit_char(_binding_0);
+ }
+ Lit::Int(_binding_0) => {
+ v.visit_lit_int(_binding_0);
+ }
+ Lit::Float(_binding_0) => {
+ v.visit_lit_float(_binding_0);
+ }
+ Lit::Bool(_binding_0) => {
+ v.visit_lit_bool(_binding_0);
+ }
+ Lit::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ }
+}
+pub fn visit_lit_bool<'ast, V>(v: &mut V, node: &'ast LitBool)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ skip!(node.value);
+ v.visit_span(&node.span);
+}
+pub fn visit_lit_byte<'ast, V>(v: &mut V, node: &'ast LitByte)
+where
+ V: Visit<'ast> + ?Sized,
+{}
+pub fn visit_lit_byte_str<'ast, V>(v: &mut V, node: &'ast LitByteStr)
+where
+ V: Visit<'ast> + ?Sized,
+{}
+pub fn visit_lit_char<'ast, V>(v: &mut V, node: &'ast LitChar)
+where
+ V: Visit<'ast> + ?Sized,
+{}
+pub fn visit_lit_float<'ast, V>(v: &mut V, node: &'ast LitFloat)
+where
+ V: Visit<'ast> + ?Sized,
+{}
+pub fn visit_lit_int<'ast, V>(v: &mut V, node: &'ast LitInt)
+where
+ V: Visit<'ast> + ?Sized,
+{}
+pub fn visit_lit_str<'ast, V>(v: &mut V, node: &'ast LitStr)
+where
+ V: Visit<'ast> + ?Sized,
+{}
+#[cfg(feature = "full")]
+pub fn visit_local<'ast, V>(v: &mut V, node: &'ast Local)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.let_token.span);
+ v.visit_pat(&node.pat);
+ if let Some(it) = &node.init {
+ tokens_helper(v, &(it).0.spans);
+ v.visit_expr(&*(it).1);
+ }
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_macro<'ast, V>(v: &mut V, node: &'ast Macro)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_path(&node.path);
+ tokens_helper(v, &node.bang_token.spans);
+ v.visit_macro_delimiter(&node.delimiter);
+ skip!(node.tokens);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_macro_delimiter<'ast, V>(v: &mut V, node: &'ast MacroDelimiter)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ MacroDelimiter::Paren(_binding_0) => {
+ tokens_helper(v, &_binding_0.span);
+ }
+ MacroDelimiter::Brace(_binding_0) => {
+ tokens_helper(v, &_binding_0.span);
+ }
+ MacroDelimiter::Bracket(_binding_0) => {
+ tokens_helper(v, &_binding_0.span);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_member<'ast, V>(v: &mut V, node: &'ast Member)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Member::Named(_binding_0) => {
+ v.visit_ident(_binding_0);
+ }
+ Member::Unnamed(_binding_0) => {
+ v.visit_index(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_meta<'ast, V>(v: &mut V, node: &'ast Meta)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Meta::Path(_binding_0) => {
+ v.visit_path(_binding_0);
+ }
+ Meta::List(_binding_0) => {
+ v.visit_meta_list(_binding_0);
+ }
+ Meta::NameValue(_binding_0) => {
+ v.visit_meta_name_value(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_meta_list<'ast, V>(v: &mut V, node: &'ast MetaList)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_path(&node.path);
+ tokens_helper(v, &node.paren_token.span);
+ for el in Punctuated::pairs(&node.nested) {
+ let (it, p) = el.into_tuple();
+ v.visit_nested_meta(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_meta_name_value<'ast, V>(v: &mut V, node: &'ast MetaNameValue)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_path(&node.path);
+ tokens_helper(v, &node.eq_token.spans);
+ v.visit_lit(&node.lit);
+}
+#[cfg(feature = "full")]
+pub fn visit_method_turbofish<'ast, V>(v: &mut V, node: &'ast MethodTurbofish)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.colon2_token.spans);
+ tokens_helper(v, &node.lt_token.spans);
+ for el in Punctuated::pairs(&node.args) {
+ let (it, p) = el.into_tuple();
+ v.visit_generic_method_argument(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ tokens_helper(v, &node.gt_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_nested_meta<'ast, V>(v: &mut V, node: &'ast NestedMeta)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ NestedMeta::Meta(_binding_0) => {
+ v.visit_meta(_binding_0);
+ }
+ NestedMeta::Lit(_binding_0) => {
+ v.visit_lit(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_parenthesized_generic_arguments<'ast, V>(
+ v: &mut V,
+ node: &'ast ParenthesizedGenericArguments,
+)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.paren_token.span);
+ for el in Punctuated::pairs(&node.inputs) {
+ let (it, p) = el.into_tuple();
+ v.visit_type(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ v.visit_return_type(&node.output);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat<'ast, V>(v: &mut V, node: &'ast Pat)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Pat::Box(_binding_0) => {
+ v.visit_pat_box(_binding_0);
+ }
+ Pat::Ident(_binding_0) => {
+ v.visit_pat_ident(_binding_0);
+ }
+ Pat::Lit(_binding_0) => {
+ v.visit_pat_lit(_binding_0);
+ }
+ Pat::Macro(_binding_0) => {
+ v.visit_pat_macro(_binding_0);
+ }
+ Pat::Or(_binding_0) => {
+ v.visit_pat_or(_binding_0);
+ }
+ Pat::Path(_binding_0) => {
+ v.visit_pat_path(_binding_0);
+ }
+ Pat::Range(_binding_0) => {
+ v.visit_pat_range(_binding_0);
+ }
+ Pat::Reference(_binding_0) => {
+ v.visit_pat_reference(_binding_0);
+ }
+ Pat::Rest(_binding_0) => {
+ v.visit_pat_rest(_binding_0);
+ }
+ Pat::Slice(_binding_0) => {
+ v.visit_pat_slice(_binding_0);
+ }
+ Pat::Struct(_binding_0) => {
+ v.visit_pat_struct(_binding_0);
+ }
+ Pat::Tuple(_binding_0) => {
+ v.visit_pat_tuple(_binding_0);
+ }
+ Pat::TupleStruct(_binding_0) => {
+ v.visit_pat_tuple_struct(_binding_0);
+ }
+ Pat::Type(_binding_0) => {
+ v.visit_pat_type(_binding_0);
+ }
+ Pat::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ Pat::Wild(_binding_0) => {
+ v.visit_pat_wild(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_box<'ast, V>(v: &mut V, node: &'ast PatBox)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.box_token.span);
+ v.visit_pat(&*node.pat);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_ident<'ast, V>(v: &mut V, node: &'ast PatIdent)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.by_ref {
+ tokens_helper(v, &it.span);
+ }
+ if let Some(it) = &node.mutability {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_ident(&node.ident);
+ if let Some(it) = &node.subpat {
+ tokens_helper(v, &(it).0.spans);
+ v.visit_pat(&*(it).1);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_lit<'ast, V>(v: &mut V, node: &'ast PatLit)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.expr);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_macro<'ast, V>(v: &mut V, node: &'ast PatMacro)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_macro(&node.mac);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_or<'ast, V>(v: &mut V, node: &'ast PatOr)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.leading_vert {
+ tokens_helper(v, &it.spans);
+ }
+ for el in Punctuated::pairs(&node.cases) {
+ let (it, p) = el.into_tuple();
+ v.visit_pat(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_path<'ast, V>(v: &mut V, node: &'ast PatPath)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.qself {
+ v.visit_qself(it);
+ }
+ v.visit_path(&node.path);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_range<'ast, V>(v: &mut V, node: &'ast PatRange)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_expr(&*node.lo);
+ v.visit_range_limits(&node.limits);
+ v.visit_expr(&*node.hi);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_reference<'ast, V>(v: &mut V, node: &'ast PatReference)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.and_token.spans);
+ if let Some(it) = &node.mutability {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_pat(&*node.pat);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_rest<'ast, V>(v: &mut V, node: &'ast PatRest)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.dot2_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_slice<'ast, V>(v: &mut V, node: &'ast PatSlice)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.bracket_token.span);
+ for el in Punctuated::pairs(&node.elems) {
+ let (it, p) = el.into_tuple();
+ v.visit_pat(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_struct<'ast, V>(v: &mut V, node: &'ast PatStruct)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_path(&node.path);
+ tokens_helper(v, &node.brace_token.span);
+ for el in Punctuated::pairs(&node.fields) {
+ let (it, p) = el.into_tuple();
+ v.visit_field_pat(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ if let Some(it) = &node.dot2_token {
+ tokens_helper(v, &it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_tuple<'ast, V>(v: &mut V, node: &'ast PatTuple)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.paren_token.span);
+ for el in Punctuated::pairs(&node.elems) {
+ let (it, p) = el.into_tuple();
+ v.visit_pat(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_tuple_struct<'ast, V>(v: &mut V, node: &'ast PatTupleStruct)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_path(&node.path);
+ v.visit_pat_tuple(&node.pat);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_type<'ast, V>(v: &mut V, node: &'ast PatType)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_pat(&*node.pat);
+ tokens_helper(v, &node.colon_token.spans);
+ v.visit_type(&*node.ty);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_wild<'ast, V>(v: &mut V, node: &'ast PatWild)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.underscore_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_path<'ast, V>(v: &mut V, node: &'ast Path)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ if let Some(it) = &node.leading_colon {
+ tokens_helper(v, &it.spans);
+ }
+ for el in Punctuated::pairs(&node.segments) {
+ let (it, p) = el.into_tuple();
+ v.visit_path_segment(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_path_arguments<'ast, V>(v: &mut V, node: &'ast PathArguments)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ PathArguments::None => {}
+ PathArguments::AngleBracketed(_binding_0) => {
+ v.visit_angle_bracketed_generic_arguments(_binding_0);
+ }
+ PathArguments::Parenthesized(_binding_0) => {
+ v.visit_parenthesized_generic_arguments(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_path_segment<'ast, V>(v: &mut V, node: &'ast PathSegment)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_ident(&node.ident);
+ v.visit_path_arguments(&node.arguments);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_predicate_eq<'ast, V>(v: &mut V, node: &'ast PredicateEq)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_type(&node.lhs_ty);
+ tokens_helper(v, &node.eq_token.spans);
+ v.visit_type(&node.rhs_ty);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_predicate_lifetime<'ast, V>(v: &mut V, node: &'ast PredicateLifetime)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_lifetime(&node.lifetime);
+ tokens_helper(v, &node.colon_token.spans);
+ for el in Punctuated::pairs(&node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_lifetime(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_predicate_type<'ast, V>(v: &mut V, node: &'ast PredicateType)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ if let Some(it) = &node.lifetimes {
+ v.visit_bound_lifetimes(it);
+ }
+ v.visit_type(&node.bounded_ty);
+ tokens_helper(v, &node.colon_token.spans);
+ for el in Punctuated::pairs(&node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_qself<'ast, V>(v: &mut V, node: &'ast QSelf)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.lt_token.spans);
+ v.visit_type(&*node.ty);
+ skip!(node.position);
+ if let Some(it) = &node.as_token {
+ tokens_helper(v, &it.span);
+ }
+ tokens_helper(v, &node.gt_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_range_limits<'ast, V>(v: &mut V, node: &'ast RangeLimits)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ RangeLimits::HalfOpen(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ RangeLimits::Closed(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_receiver<'ast, V>(v: &mut V, node: &'ast Receiver)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ if let Some(it) = &node.reference {
+ tokens_helper(v, &(it).0.spans);
+ if let Some(it) = &(it).1 {
+ v.visit_lifetime(it);
+ }
+ }
+ if let Some(it) = &node.mutability {
+ tokens_helper(v, &it.span);
+ }
+ tokens_helper(v, &node.self_token.span);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_return_type<'ast, V>(v: &mut V, node: &'ast ReturnType)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ ReturnType::Default => {}
+ ReturnType::Type(_binding_0, _binding_1) => {
+ tokens_helper(v, &_binding_0.spans);
+ v.visit_type(&**_binding_1);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_signature<'ast, V>(v: &mut V, node: &'ast Signature)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ if let Some(it) = &node.constness {
+ tokens_helper(v, &it.span);
+ }
+ if let Some(it) = &node.asyncness {
+ tokens_helper(v, &it.span);
+ }
+ if let Some(it) = &node.unsafety {
+ tokens_helper(v, &it.span);
+ }
+ if let Some(it) = &node.abi {
+ v.visit_abi(it);
+ }
+ tokens_helper(v, &node.fn_token.span);
+ v.visit_ident(&node.ident);
+ v.visit_generics(&node.generics);
+ tokens_helper(v, &node.paren_token.span);
+ for el in Punctuated::pairs(&node.inputs) {
+ let (it, p) = el.into_tuple();
+ v.visit_fn_arg(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ if let Some(it) = &node.variadic {
+ v.visit_variadic(it);
+ }
+ v.visit_return_type(&node.output);
+}
+pub fn visit_span<'ast, V>(v: &mut V, node: &Span)
+where
+ V: Visit<'ast> + ?Sized,
+{}
+#[cfg(feature = "full")]
+pub fn visit_stmt<'ast, V>(v: &mut V, node: &'ast Stmt)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Stmt::Local(_binding_0) => {
+ v.visit_local(_binding_0);
+ }
+ Stmt::Item(_binding_0) => {
+ v.visit_item(_binding_0);
+ }
+ Stmt::Expr(_binding_0) => {
+ v.visit_expr(_binding_0);
+ }
+ Stmt::Semi(_binding_0, _binding_1) => {
+ v.visit_expr(_binding_0);
+ tokens_helper(v, &_binding_1.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_trait_bound<'ast, V>(v: &mut V, node: &'ast TraitBound)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ if let Some(it) = &node.paren_token {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_trait_bound_modifier(&node.modifier);
+ if let Some(it) = &node.lifetimes {
+ v.visit_bound_lifetimes(it);
+ }
+ v.visit_path(&node.path);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_trait_bound_modifier<'ast, V>(v: &mut V, node: &'ast TraitBoundModifier)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ TraitBoundModifier::None => {}
+ TraitBoundModifier::Maybe(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_trait_item<'ast, V>(v: &mut V, node: &'ast TraitItem)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ TraitItem::Const(_binding_0) => {
+ v.visit_trait_item_const(_binding_0);
+ }
+ TraitItem::Method(_binding_0) => {
+ v.visit_trait_item_method(_binding_0);
+ }
+ TraitItem::Type(_binding_0) => {
+ v.visit_trait_item_type(_binding_0);
+ }
+ TraitItem::Macro(_binding_0) => {
+ v.visit_trait_item_macro(_binding_0);
+ }
+ TraitItem::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_trait_item_const<'ast, V>(v: &mut V, node: &'ast TraitItemConst)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.const_token.span);
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.colon_token.spans);
+ v.visit_type(&node.ty);
+ if let Some(it) = &node.default {
+ tokens_helper(v, &(it).0.spans);
+ v.visit_expr(&(it).1);
+ }
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_trait_item_macro<'ast, V>(v: &mut V, node: &'ast TraitItemMacro)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_macro(&node.mac);
+ if let Some(it) = &node.semi_token {
+ tokens_helper(v, &it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_trait_item_method<'ast, V>(v: &mut V, node: &'ast TraitItemMethod)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_signature(&node.sig);
+ if let Some(it) = &node.default {
+ v.visit_block(it);
+ }
+ if let Some(it) = &node.semi_token {
+ tokens_helper(v, &it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_trait_item_type<'ast, V>(v: &mut V, node: &'ast TraitItemType)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.type_token.span);
+ v.visit_ident(&node.ident);
+ v.visit_generics(&node.generics);
+ if let Some(it) = &node.colon_token {
+ tokens_helper(v, &it.spans);
+ }
+ for el in Punctuated::pairs(&node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ if let Some(it) = &node.default {
+ tokens_helper(v, &(it).0.spans);
+ v.visit_type(&(it).1);
+ }
+ tokens_helper(v, &node.semi_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type<'ast, V>(v: &mut V, node: &'ast Type)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Type::Array(_binding_0) => {
+ v.visit_type_array(_binding_0);
+ }
+ Type::BareFn(_binding_0) => {
+ v.visit_type_bare_fn(_binding_0);
+ }
+ Type::Group(_binding_0) => {
+ v.visit_type_group(_binding_0);
+ }
+ Type::ImplTrait(_binding_0) => {
+ v.visit_type_impl_trait(_binding_0);
+ }
+ Type::Infer(_binding_0) => {
+ v.visit_type_infer(_binding_0);
+ }
+ Type::Macro(_binding_0) => {
+ v.visit_type_macro(_binding_0);
+ }
+ Type::Never(_binding_0) => {
+ v.visit_type_never(_binding_0);
+ }
+ Type::Paren(_binding_0) => {
+ v.visit_type_paren(_binding_0);
+ }
+ Type::Path(_binding_0) => {
+ v.visit_type_path(_binding_0);
+ }
+ Type::Ptr(_binding_0) => {
+ v.visit_type_ptr(_binding_0);
+ }
+ Type::Reference(_binding_0) => {
+ v.visit_type_reference(_binding_0);
+ }
+ Type::Slice(_binding_0) => {
+ v.visit_type_slice(_binding_0);
+ }
+ Type::TraitObject(_binding_0) => {
+ v.visit_type_trait_object(_binding_0);
+ }
+ Type::Tuple(_binding_0) => {
+ v.visit_type_tuple(_binding_0);
+ }
+ Type::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_array<'ast, V>(v: &mut V, node: &'ast TypeArray)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.bracket_token.span);
+ v.visit_type(&*node.elem);
+ tokens_helper(v, &node.semi_token.spans);
+ v.visit_expr(&node.len);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_bare_fn<'ast, V>(v: &mut V, node: &'ast TypeBareFn)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ if let Some(it) = &node.lifetimes {
+ v.visit_bound_lifetimes(it);
+ }
+ if let Some(it) = &node.unsafety {
+ tokens_helper(v, &it.span);
+ }
+ if let Some(it) = &node.abi {
+ v.visit_abi(it);
+ }
+ tokens_helper(v, &node.fn_token.span);
+ tokens_helper(v, &node.paren_token.span);
+ for el in Punctuated::pairs(&node.inputs) {
+ let (it, p) = el.into_tuple();
+ v.visit_bare_fn_arg(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ if let Some(it) = &node.variadic {
+ v.visit_variadic(it);
+ }
+ v.visit_return_type(&node.output);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_group<'ast, V>(v: &mut V, node: &'ast TypeGroup)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.group_token.span);
+ v.visit_type(&*node.elem);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_impl_trait<'ast, V>(v: &mut V, node: &'ast TypeImplTrait)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.impl_token.span);
+ for el in Punctuated::pairs(&node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_infer<'ast, V>(v: &mut V, node: &'ast TypeInfer)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.underscore_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_macro<'ast, V>(v: &mut V, node: &'ast TypeMacro)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_macro(&node.mac);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_never<'ast, V>(v: &mut V, node: &'ast TypeNever)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.bang_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_param<'ast, V>(v: &mut V, node: &'ast TypeParam)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_ident(&node.ident);
+ if let Some(it) = &node.colon_token {
+ tokens_helper(v, &it.spans);
+ }
+ for el in Punctuated::pairs(&node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+ if let Some(it) = &node.eq_token {
+ tokens_helper(v, &it.spans);
+ }
+ if let Some(it) = &node.default {
+ v.visit_type(it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_param_bound<'ast, V>(v: &mut V, node: &'ast TypeParamBound)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ TypeParamBound::Trait(_binding_0) => {
+ v.visit_trait_bound(_binding_0);
+ }
+ TypeParamBound::Lifetime(_binding_0) => {
+ v.visit_lifetime(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_paren<'ast, V>(v: &mut V, node: &'ast TypeParen)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.paren_token.span);
+ v.visit_type(&*node.elem);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_path<'ast, V>(v: &mut V, node: &'ast TypePath)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ if let Some(it) = &node.qself {
+ v.visit_qself(it);
+ }
+ v.visit_path(&node.path);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_ptr<'ast, V>(v: &mut V, node: &'ast TypePtr)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.star_token.spans);
+ if let Some(it) = &node.const_token {
+ tokens_helper(v, &it.span);
+ }
+ if let Some(it) = &node.mutability {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_type(&*node.elem);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_reference<'ast, V>(v: &mut V, node: &'ast TypeReference)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.and_token.spans);
+ if let Some(it) = &node.lifetime {
+ v.visit_lifetime(it);
+ }
+ if let Some(it) = &node.mutability {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_type(&*node.elem);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_slice<'ast, V>(v: &mut V, node: &'ast TypeSlice)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.bracket_token.span);
+ v.visit_type(&*node.elem);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_trait_object<'ast, V>(v: &mut V, node: &'ast TypeTraitObject)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ if let Some(it) = &node.dyn_token {
+ tokens_helper(v, &it.span);
+ }
+ for el in Punctuated::pairs(&node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_tuple<'ast, V>(v: &mut V, node: &'ast TypeTuple)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.paren_token.span);
+ for el in Punctuated::pairs(&node.elems) {
+ let (it, p) = el.into_tuple();
+ v.visit_type(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_un_op<'ast, V>(v: &mut V, node: &'ast UnOp)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ UnOp::Deref(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ UnOp::Not(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ UnOp::Neg(_binding_0) => {
+ tokens_helper(v, &_binding_0.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_use_glob<'ast, V>(v: &mut V, node: &'ast UseGlob)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.star_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_use_group<'ast, V>(v: &mut V, node: &'ast UseGroup)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.brace_token.span);
+ for el in Punctuated::pairs(&node.items) {
+ let (it, p) = el.into_tuple();
+ v.visit_use_tree(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_use_name<'ast, V>(v: &mut V, node: &'ast UseName)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_ident(&node.ident);
+}
+#[cfg(feature = "full")]
+pub fn visit_use_path<'ast, V>(v: &mut V, node: &'ast UsePath)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.colon2_token.spans);
+ v.visit_use_tree(&*node.tree);
+}
+#[cfg(feature = "full")]
+pub fn visit_use_rename<'ast, V>(v: &mut V, node: &'ast UseRename)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ v.visit_ident(&node.ident);
+ tokens_helper(v, &node.as_token.span);
+ v.visit_ident(&node.rename);
+}
+#[cfg(feature = "full")]
+pub fn visit_use_tree<'ast, V>(v: &mut V, node: &'ast UseTree)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ UseTree::Path(_binding_0) => {
+ v.visit_use_path(_binding_0);
+ }
+ UseTree::Name(_binding_0) => {
+ v.visit_use_name(_binding_0);
+ }
+ UseTree::Rename(_binding_0) => {
+ v.visit_use_rename(_binding_0);
+ }
+ UseTree::Glob(_binding_0) => {
+ v.visit_use_glob(_binding_0);
+ }
+ UseTree::Group(_binding_0) => {
+ v.visit_use_group(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_variadic<'ast, V>(v: &mut V, node: &'ast Variadic)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ tokens_helper(v, &node.dots.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_variant<'ast, V>(v: &mut V, node: &'ast Variant)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ for it in &node.attrs {
+ v.visit_attribute(it);
+ }
+ v.visit_ident(&node.ident);
+ v.visit_fields(&node.fields);
+ if let Some(it) = &node.discriminant {
+ tokens_helper(v, &(it).0.spans);
+ v.visit_expr(&(it).1);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_vis_crate<'ast, V>(v: &mut V, node: &'ast VisCrate)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.crate_token.span);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_vis_public<'ast, V>(v: &mut V, node: &'ast VisPublic)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.pub_token.span);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_vis_restricted<'ast, V>(v: &mut V, node: &'ast VisRestricted)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.pub_token.span);
+ tokens_helper(v, &node.paren_token.span);
+ if let Some(it) = &node.in_token {
+ tokens_helper(v, &it.span);
+ }
+ v.visit_path(&*node.path);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_visibility<'ast, V>(v: &mut V, node: &'ast Visibility)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ Visibility::Public(_binding_0) => {
+ v.visit_vis_public(_binding_0);
+ }
+ Visibility::Crate(_binding_0) => {
+ v.visit_vis_crate(_binding_0);
+ }
+ Visibility::Restricted(_binding_0) => {
+ v.visit_vis_restricted(_binding_0);
+ }
+ Visibility::Inherited => {}
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_where_clause<'ast, V>(v: &mut V, node: &'ast WhereClause)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ tokens_helper(v, &node.where_token.span);
+ for el in Punctuated::pairs(&node.predicates) {
+ let (it, p) = el.into_tuple();
+ v.visit_where_predicate(it);
+ if let Some(p) = p {
+ tokens_helper(v, &p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_where_predicate<'ast, V>(v: &mut V, node: &'ast WherePredicate)
+where
+ V: Visit<'ast> + ?Sized,
+{
+ match node {
+ WherePredicate::Type(_binding_0) => {
+ v.visit_predicate_type(_binding_0);
+ }
+ WherePredicate::Lifetime(_binding_0) => {
+ v.visit_predicate_lifetime(_binding_0);
+ }
+ WherePredicate::Eq(_binding_0) => {
+ v.visit_predicate_eq(_binding_0);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/gen/visit_mut.rs b/third_party/rust/syn/src/gen/visit_mut.rs
new file mode 100644
index 0000000000..239709d194
--- /dev/null
+++ b/third_party/rust/syn/src/gen/visit_mut.rs
@@ -0,0 +1,3786 @@
+// This file is @generated by syn-internal-codegen.
+// It is not intended for manual editing.
+
+#![allow(unused_variables)]
+#[cfg(any(feature = "full", feature = "derive"))]
+use crate::gen::helper::visit_mut::*;
+#[cfg(any(feature = "full", feature = "derive"))]
+use crate::punctuated::Punctuated;
+use crate::*;
+use proc_macro2::Span;
+#[cfg(feature = "full")]
+macro_rules! full {
+ ($e:expr) => {
+ $e
+ };
+}
+#[cfg(all(feature = "derive", not(feature = "full")))]
+macro_rules! full {
+ ($e:expr) => {
+ unreachable!()
+ };
+}
+macro_rules! skip {
+ ($($tt:tt)*) => {};
+}
+/// Syntax tree traversal to mutate an exclusive borrow of a syntax tree in
+/// place.
+///
+/// See the [module documentation] for details.
+///
+/// [module documentation]: self
+///
+/// *This trait is available only if Syn is built with the `"visit-mut"` feature.*
+pub trait VisitMut {
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_abi_mut(&mut self, i: &mut Abi) {
+ visit_abi_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_angle_bracketed_generic_arguments_mut(
+ &mut self,
+ i: &mut AngleBracketedGenericArguments,
+ ) {
+ visit_angle_bracketed_generic_arguments_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_arm_mut(&mut self, i: &mut Arm) {
+ visit_arm_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_attr_style_mut(&mut self, i: &mut AttrStyle) {
+ visit_attr_style_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_attribute_mut(&mut self, i: &mut Attribute) {
+ visit_attribute_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_bare_fn_arg_mut(&mut self, i: &mut BareFnArg) {
+ visit_bare_fn_arg_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_bin_op_mut(&mut self, i: &mut BinOp) {
+ visit_bin_op_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_binding_mut(&mut self, i: &mut Binding) {
+ visit_binding_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_block_mut(&mut self, i: &mut Block) {
+ visit_block_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_bound_lifetimes_mut(&mut self, i: &mut BoundLifetimes) {
+ visit_bound_lifetimes_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_const_param_mut(&mut self, i: &mut ConstParam) {
+ visit_const_param_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_constraint_mut(&mut self, i: &mut Constraint) {
+ visit_constraint_mut(self, i);
+ }
+ #[cfg(feature = "derive")]
+ fn visit_data_mut(&mut self, i: &mut Data) {
+ visit_data_mut(self, i);
+ }
+ #[cfg(feature = "derive")]
+ fn visit_data_enum_mut(&mut self, i: &mut DataEnum) {
+ visit_data_enum_mut(self, i);
+ }
+ #[cfg(feature = "derive")]
+ fn visit_data_struct_mut(&mut self, i: &mut DataStruct) {
+ visit_data_struct_mut(self, i);
+ }
+ #[cfg(feature = "derive")]
+ fn visit_data_union_mut(&mut self, i: &mut DataUnion) {
+ visit_data_union_mut(self, i);
+ }
+ #[cfg(feature = "derive")]
+ fn visit_derive_input_mut(&mut self, i: &mut DeriveInput) {
+ visit_derive_input_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_mut(&mut self, i: &mut Expr) {
+ visit_expr_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_array_mut(&mut self, i: &mut ExprArray) {
+ visit_expr_array_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_assign_mut(&mut self, i: &mut ExprAssign) {
+ visit_expr_assign_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_assign_op_mut(&mut self, i: &mut ExprAssignOp) {
+ visit_expr_assign_op_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_async_mut(&mut self, i: &mut ExprAsync) {
+ visit_expr_async_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_await_mut(&mut self, i: &mut ExprAwait) {
+ visit_expr_await_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_binary_mut(&mut self, i: &mut ExprBinary) {
+ visit_expr_binary_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_block_mut(&mut self, i: &mut ExprBlock) {
+ visit_expr_block_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_box_mut(&mut self, i: &mut ExprBox) {
+ visit_expr_box_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_break_mut(&mut self, i: &mut ExprBreak) {
+ visit_expr_break_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_call_mut(&mut self, i: &mut ExprCall) {
+ visit_expr_call_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_cast_mut(&mut self, i: &mut ExprCast) {
+ visit_expr_cast_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_closure_mut(&mut self, i: &mut ExprClosure) {
+ visit_expr_closure_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_continue_mut(&mut self, i: &mut ExprContinue) {
+ visit_expr_continue_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_field_mut(&mut self, i: &mut ExprField) {
+ visit_expr_field_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_for_loop_mut(&mut self, i: &mut ExprForLoop) {
+ visit_expr_for_loop_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_group_mut(&mut self, i: &mut ExprGroup) {
+ visit_expr_group_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_if_mut(&mut self, i: &mut ExprIf) {
+ visit_expr_if_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_index_mut(&mut self, i: &mut ExprIndex) {
+ visit_expr_index_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_let_mut(&mut self, i: &mut ExprLet) {
+ visit_expr_let_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_lit_mut(&mut self, i: &mut ExprLit) {
+ visit_expr_lit_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_loop_mut(&mut self, i: &mut ExprLoop) {
+ visit_expr_loop_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_macro_mut(&mut self, i: &mut ExprMacro) {
+ visit_expr_macro_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_match_mut(&mut self, i: &mut ExprMatch) {
+ visit_expr_match_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_method_call_mut(&mut self, i: &mut ExprMethodCall) {
+ visit_expr_method_call_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_paren_mut(&mut self, i: &mut ExprParen) {
+ visit_expr_paren_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_path_mut(&mut self, i: &mut ExprPath) {
+ visit_expr_path_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_range_mut(&mut self, i: &mut ExprRange) {
+ visit_expr_range_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_reference_mut(&mut self, i: &mut ExprReference) {
+ visit_expr_reference_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_repeat_mut(&mut self, i: &mut ExprRepeat) {
+ visit_expr_repeat_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_return_mut(&mut self, i: &mut ExprReturn) {
+ visit_expr_return_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_struct_mut(&mut self, i: &mut ExprStruct) {
+ visit_expr_struct_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_try_mut(&mut self, i: &mut ExprTry) {
+ visit_expr_try_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_try_block_mut(&mut self, i: &mut ExprTryBlock) {
+ visit_expr_try_block_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_tuple_mut(&mut self, i: &mut ExprTuple) {
+ visit_expr_tuple_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_type_mut(&mut self, i: &mut ExprType) {
+ visit_expr_type_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_expr_unary_mut(&mut self, i: &mut ExprUnary) {
+ visit_expr_unary_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_unsafe_mut(&mut self, i: &mut ExprUnsafe) {
+ visit_expr_unsafe_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_while_mut(&mut self, i: &mut ExprWhile) {
+ visit_expr_while_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_expr_yield_mut(&mut self, i: &mut ExprYield) {
+ visit_expr_yield_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_field_mut(&mut self, i: &mut Field) {
+ visit_field_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_field_pat_mut(&mut self, i: &mut FieldPat) {
+ visit_field_pat_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_field_value_mut(&mut self, i: &mut FieldValue) {
+ visit_field_value_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_fields_mut(&mut self, i: &mut Fields) {
+ visit_fields_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_fields_named_mut(&mut self, i: &mut FieldsNamed) {
+ visit_fields_named_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_fields_unnamed_mut(&mut self, i: &mut FieldsUnnamed) {
+ visit_fields_unnamed_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_file_mut(&mut self, i: &mut File) {
+ visit_file_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_fn_arg_mut(&mut self, i: &mut FnArg) {
+ visit_fn_arg_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_foreign_item_mut(&mut self, i: &mut ForeignItem) {
+ visit_foreign_item_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_foreign_item_fn_mut(&mut self, i: &mut ForeignItemFn) {
+ visit_foreign_item_fn_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_foreign_item_macro_mut(&mut self, i: &mut ForeignItemMacro) {
+ visit_foreign_item_macro_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_foreign_item_static_mut(&mut self, i: &mut ForeignItemStatic) {
+ visit_foreign_item_static_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_foreign_item_type_mut(&mut self, i: &mut ForeignItemType) {
+ visit_foreign_item_type_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_generic_argument_mut(&mut self, i: &mut GenericArgument) {
+ visit_generic_argument_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_generic_method_argument_mut(&mut self, i: &mut GenericMethodArgument) {
+ visit_generic_method_argument_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_generic_param_mut(&mut self, i: &mut GenericParam) {
+ visit_generic_param_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_generics_mut(&mut self, i: &mut Generics) {
+ visit_generics_mut(self, i);
+ }
+ fn visit_ident_mut(&mut self, i: &mut Ident) {
+ visit_ident_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_impl_item_mut(&mut self, i: &mut ImplItem) {
+ visit_impl_item_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_impl_item_const_mut(&mut self, i: &mut ImplItemConst) {
+ visit_impl_item_const_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_impl_item_macro_mut(&mut self, i: &mut ImplItemMacro) {
+ visit_impl_item_macro_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_impl_item_method_mut(&mut self, i: &mut ImplItemMethod) {
+ visit_impl_item_method_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_impl_item_type_mut(&mut self, i: &mut ImplItemType) {
+ visit_impl_item_type_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_index_mut(&mut self, i: &mut Index) {
+ visit_index_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_mut(&mut self, i: &mut Item) {
+ visit_item_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_const_mut(&mut self, i: &mut ItemConst) {
+ visit_item_const_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_enum_mut(&mut self, i: &mut ItemEnum) {
+ visit_item_enum_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_extern_crate_mut(&mut self, i: &mut ItemExternCrate) {
+ visit_item_extern_crate_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_fn_mut(&mut self, i: &mut ItemFn) {
+ visit_item_fn_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_foreign_mod_mut(&mut self, i: &mut ItemForeignMod) {
+ visit_item_foreign_mod_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_impl_mut(&mut self, i: &mut ItemImpl) {
+ visit_item_impl_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_macro_mut(&mut self, i: &mut ItemMacro) {
+ visit_item_macro_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_macro2_mut(&mut self, i: &mut ItemMacro2) {
+ visit_item_macro2_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_mod_mut(&mut self, i: &mut ItemMod) {
+ visit_item_mod_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_static_mut(&mut self, i: &mut ItemStatic) {
+ visit_item_static_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_struct_mut(&mut self, i: &mut ItemStruct) {
+ visit_item_struct_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_trait_mut(&mut self, i: &mut ItemTrait) {
+ visit_item_trait_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_trait_alias_mut(&mut self, i: &mut ItemTraitAlias) {
+ visit_item_trait_alias_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_type_mut(&mut self, i: &mut ItemType) {
+ visit_item_type_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_union_mut(&mut self, i: &mut ItemUnion) {
+ visit_item_union_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_item_use_mut(&mut self, i: &mut ItemUse) {
+ visit_item_use_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_label_mut(&mut self, i: &mut Label) {
+ visit_label_mut(self, i);
+ }
+ fn visit_lifetime_mut(&mut self, i: &mut Lifetime) {
+ visit_lifetime_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_lifetime_def_mut(&mut self, i: &mut LifetimeDef) {
+ visit_lifetime_def_mut(self, i);
+ }
+ fn visit_lit_mut(&mut self, i: &mut Lit) {
+ visit_lit_mut(self, i);
+ }
+ fn visit_lit_bool_mut(&mut self, i: &mut LitBool) {
+ visit_lit_bool_mut(self, i);
+ }
+ fn visit_lit_byte_mut(&mut self, i: &mut LitByte) {
+ visit_lit_byte_mut(self, i);
+ }
+ fn visit_lit_byte_str_mut(&mut self, i: &mut LitByteStr) {
+ visit_lit_byte_str_mut(self, i);
+ }
+ fn visit_lit_char_mut(&mut self, i: &mut LitChar) {
+ visit_lit_char_mut(self, i);
+ }
+ fn visit_lit_float_mut(&mut self, i: &mut LitFloat) {
+ visit_lit_float_mut(self, i);
+ }
+ fn visit_lit_int_mut(&mut self, i: &mut LitInt) {
+ visit_lit_int_mut(self, i);
+ }
+ fn visit_lit_str_mut(&mut self, i: &mut LitStr) {
+ visit_lit_str_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_local_mut(&mut self, i: &mut Local) {
+ visit_local_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_macro_mut(&mut self, i: &mut Macro) {
+ visit_macro_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_macro_delimiter_mut(&mut self, i: &mut MacroDelimiter) {
+ visit_macro_delimiter_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_member_mut(&mut self, i: &mut Member) {
+ visit_member_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_meta_mut(&mut self, i: &mut Meta) {
+ visit_meta_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_meta_list_mut(&mut self, i: &mut MetaList) {
+ visit_meta_list_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_meta_name_value_mut(&mut self, i: &mut MetaNameValue) {
+ visit_meta_name_value_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_method_turbofish_mut(&mut self, i: &mut MethodTurbofish) {
+ visit_method_turbofish_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_nested_meta_mut(&mut self, i: &mut NestedMeta) {
+ visit_nested_meta_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_parenthesized_generic_arguments_mut(
+ &mut self,
+ i: &mut ParenthesizedGenericArguments,
+ ) {
+ visit_parenthesized_generic_arguments_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_mut(&mut self, i: &mut Pat) {
+ visit_pat_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_box_mut(&mut self, i: &mut PatBox) {
+ visit_pat_box_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_ident_mut(&mut self, i: &mut PatIdent) {
+ visit_pat_ident_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_lit_mut(&mut self, i: &mut PatLit) {
+ visit_pat_lit_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_macro_mut(&mut self, i: &mut PatMacro) {
+ visit_pat_macro_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_or_mut(&mut self, i: &mut PatOr) {
+ visit_pat_or_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_path_mut(&mut self, i: &mut PatPath) {
+ visit_pat_path_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_range_mut(&mut self, i: &mut PatRange) {
+ visit_pat_range_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_reference_mut(&mut self, i: &mut PatReference) {
+ visit_pat_reference_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_rest_mut(&mut self, i: &mut PatRest) {
+ visit_pat_rest_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_slice_mut(&mut self, i: &mut PatSlice) {
+ visit_pat_slice_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_struct_mut(&mut self, i: &mut PatStruct) {
+ visit_pat_struct_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_tuple_mut(&mut self, i: &mut PatTuple) {
+ visit_pat_tuple_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_tuple_struct_mut(&mut self, i: &mut PatTupleStruct) {
+ visit_pat_tuple_struct_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_type_mut(&mut self, i: &mut PatType) {
+ visit_pat_type_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_pat_wild_mut(&mut self, i: &mut PatWild) {
+ visit_pat_wild_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_path_mut(&mut self, i: &mut Path) {
+ visit_path_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_path_arguments_mut(&mut self, i: &mut PathArguments) {
+ visit_path_arguments_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_path_segment_mut(&mut self, i: &mut PathSegment) {
+ visit_path_segment_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_predicate_eq_mut(&mut self, i: &mut PredicateEq) {
+ visit_predicate_eq_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_predicate_lifetime_mut(&mut self, i: &mut PredicateLifetime) {
+ visit_predicate_lifetime_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_predicate_type_mut(&mut self, i: &mut PredicateType) {
+ visit_predicate_type_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_qself_mut(&mut self, i: &mut QSelf) {
+ visit_qself_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_range_limits_mut(&mut self, i: &mut RangeLimits) {
+ visit_range_limits_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_receiver_mut(&mut self, i: &mut Receiver) {
+ visit_receiver_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_return_type_mut(&mut self, i: &mut ReturnType) {
+ visit_return_type_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_signature_mut(&mut self, i: &mut Signature) {
+ visit_signature_mut(self, i);
+ }
+ fn visit_span_mut(&mut self, i: &mut Span) {
+ visit_span_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_stmt_mut(&mut self, i: &mut Stmt) {
+ visit_stmt_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_trait_bound_mut(&mut self, i: &mut TraitBound) {
+ visit_trait_bound_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_trait_bound_modifier_mut(&mut self, i: &mut TraitBoundModifier) {
+ visit_trait_bound_modifier_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_trait_item_mut(&mut self, i: &mut TraitItem) {
+ visit_trait_item_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_trait_item_const_mut(&mut self, i: &mut TraitItemConst) {
+ visit_trait_item_const_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_trait_item_macro_mut(&mut self, i: &mut TraitItemMacro) {
+ visit_trait_item_macro_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_trait_item_method_mut(&mut self, i: &mut TraitItemMethod) {
+ visit_trait_item_method_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_trait_item_type_mut(&mut self, i: &mut TraitItemType) {
+ visit_trait_item_type_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_mut(&mut self, i: &mut Type) {
+ visit_type_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_array_mut(&mut self, i: &mut TypeArray) {
+ visit_type_array_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_bare_fn_mut(&mut self, i: &mut TypeBareFn) {
+ visit_type_bare_fn_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_group_mut(&mut self, i: &mut TypeGroup) {
+ visit_type_group_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_impl_trait_mut(&mut self, i: &mut TypeImplTrait) {
+ visit_type_impl_trait_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_infer_mut(&mut self, i: &mut TypeInfer) {
+ visit_type_infer_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_macro_mut(&mut self, i: &mut TypeMacro) {
+ visit_type_macro_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_never_mut(&mut self, i: &mut TypeNever) {
+ visit_type_never_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_param_mut(&mut self, i: &mut TypeParam) {
+ visit_type_param_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_param_bound_mut(&mut self, i: &mut TypeParamBound) {
+ visit_type_param_bound_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_paren_mut(&mut self, i: &mut TypeParen) {
+ visit_type_paren_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_path_mut(&mut self, i: &mut TypePath) {
+ visit_type_path_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_ptr_mut(&mut self, i: &mut TypePtr) {
+ visit_type_ptr_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_reference_mut(&mut self, i: &mut TypeReference) {
+ visit_type_reference_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_slice_mut(&mut self, i: &mut TypeSlice) {
+ visit_type_slice_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_trait_object_mut(&mut self, i: &mut TypeTraitObject) {
+ visit_type_trait_object_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_type_tuple_mut(&mut self, i: &mut TypeTuple) {
+ visit_type_tuple_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_un_op_mut(&mut self, i: &mut UnOp) {
+ visit_un_op_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_glob_mut(&mut self, i: &mut UseGlob) {
+ visit_use_glob_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_group_mut(&mut self, i: &mut UseGroup) {
+ visit_use_group_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_name_mut(&mut self, i: &mut UseName) {
+ visit_use_name_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_path_mut(&mut self, i: &mut UsePath) {
+ visit_use_path_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_rename_mut(&mut self, i: &mut UseRename) {
+ visit_use_rename_mut(self, i);
+ }
+ #[cfg(feature = "full")]
+ fn visit_use_tree_mut(&mut self, i: &mut UseTree) {
+ visit_use_tree_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_variadic_mut(&mut self, i: &mut Variadic) {
+ visit_variadic_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_variant_mut(&mut self, i: &mut Variant) {
+ visit_variant_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_vis_crate_mut(&mut self, i: &mut VisCrate) {
+ visit_vis_crate_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_vis_public_mut(&mut self, i: &mut VisPublic) {
+ visit_vis_public_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_vis_restricted_mut(&mut self, i: &mut VisRestricted) {
+ visit_vis_restricted_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_visibility_mut(&mut self, i: &mut Visibility) {
+ visit_visibility_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_where_clause_mut(&mut self, i: &mut WhereClause) {
+ visit_where_clause_mut(self, i);
+ }
+ #[cfg(any(feature = "derive", feature = "full"))]
+ fn visit_where_predicate_mut(&mut self, i: &mut WherePredicate) {
+ visit_where_predicate_mut(self, i);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_abi_mut<V>(v: &mut V, node: &mut Abi)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.extern_token.span);
+ if let Some(it) = &mut node.name {
+ v.visit_lit_str_mut(it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_angle_bracketed_generic_arguments_mut<V>(
+ v: &mut V,
+ node: &mut AngleBracketedGenericArguments,
+)
+where
+ V: VisitMut + ?Sized,
+{
+ if let Some(it) = &mut node.colon2_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ tokens_helper(v, &mut node.lt_token.spans);
+ for el in Punctuated::pairs_mut(&mut node.args) {
+ let (it, p) = el.into_tuple();
+ v.visit_generic_argument_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ tokens_helper(v, &mut node.gt_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_arm_mut<V>(v: &mut V, node: &mut Arm)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_pat_mut(&mut node.pat);
+ if let Some(it) = &mut node.guard {
+ tokens_helper(v, &mut (it).0.span);
+ v.visit_expr_mut(&mut *(it).1);
+ }
+ tokens_helper(v, &mut node.fat_arrow_token.spans);
+ v.visit_expr_mut(&mut *node.body);
+ if let Some(it) = &mut node.comma {
+ tokens_helper(v, &mut it.spans);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_attr_style_mut<V>(v: &mut V, node: &mut AttrStyle)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ AttrStyle::Outer => {}
+ AttrStyle::Inner(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_attribute_mut<V>(v: &mut V, node: &mut Attribute)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.pound_token.spans);
+ v.visit_attr_style_mut(&mut node.style);
+ tokens_helper(v, &mut node.bracket_token.span);
+ v.visit_path_mut(&mut node.path);
+ skip!(node.tokens);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_bare_fn_arg_mut<V>(v: &mut V, node: &mut BareFnArg)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.name {
+ v.visit_ident_mut(&mut (it).0);
+ tokens_helper(v, &mut (it).1.spans);
+ }
+ v.visit_type_mut(&mut node.ty);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_bin_op_mut<V>(v: &mut V, node: &mut BinOp)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ BinOp::Add(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Sub(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Mul(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Div(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Rem(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::And(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Or(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::BitXor(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::BitAnd(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::BitOr(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Shl(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Shr(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Eq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Lt(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Le(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Ne(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Ge(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::Gt(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::AddEq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::SubEq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::MulEq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::DivEq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::RemEq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::BitXorEq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::BitAndEq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::BitOrEq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::ShlEq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ BinOp::ShrEq(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_binding_mut<V>(v: &mut V, node: &mut Binding)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.eq_token.spans);
+ v.visit_type_mut(&mut node.ty);
+}
+#[cfg(feature = "full")]
+pub fn visit_block_mut<V>(v: &mut V, node: &mut Block)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.brace_token.span);
+ for it in &mut node.stmts {
+ v.visit_stmt_mut(it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_bound_lifetimes_mut<V>(v: &mut V, node: &mut BoundLifetimes)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.for_token.span);
+ tokens_helper(v, &mut node.lt_token.spans);
+ for el in Punctuated::pairs_mut(&mut node.lifetimes) {
+ let (it, p) = el.into_tuple();
+ v.visit_lifetime_def_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ tokens_helper(v, &mut node.gt_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_const_param_mut<V>(v: &mut V, node: &mut ConstParam)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.const_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.colon_token.spans);
+ v.visit_type_mut(&mut node.ty);
+ if let Some(it) = &mut node.eq_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ if let Some(it) = &mut node.default {
+ v.visit_expr_mut(it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_constraint_mut<V>(v: &mut V, node: &mut Constraint)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.colon_token.spans);
+ for el in Punctuated::pairs_mut(&mut node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(feature = "derive")]
+pub fn visit_data_mut<V>(v: &mut V, node: &mut Data)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Data::Struct(_binding_0) => {
+ v.visit_data_struct_mut(_binding_0);
+ }
+ Data::Enum(_binding_0) => {
+ v.visit_data_enum_mut(_binding_0);
+ }
+ Data::Union(_binding_0) => {
+ v.visit_data_union_mut(_binding_0);
+ }
+ }
+}
+#[cfg(feature = "derive")]
+pub fn visit_data_enum_mut<V>(v: &mut V, node: &mut DataEnum)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.enum_token.span);
+ tokens_helper(v, &mut node.brace_token.span);
+ for el in Punctuated::pairs_mut(&mut node.variants) {
+ let (it, p) = el.into_tuple();
+ v.visit_variant_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(feature = "derive")]
+pub fn visit_data_struct_mut<V>(v: &mut V, node: &mut DataStruct)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.struct_token.span);
+ v.visit_fields_mut(&mut node.fields);
+ if let Some(it) = &mut node.semi_token {
+ tokens_helper(v, &mut it.spans);
+ }
+}
+#[cfg(feature = "derive")]
+pub fn visit_data_union_mut<V>(v: &mut V, node: &mut DataUnion)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.union_token.span);
+ v.visit_fields_named_mut(&mut node.fields);
+}
+#[cfg(feature = "derive")]
+pub fn visit_derive_input_mut<V>(v: &mut V, node: &mut DeriveInput)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_generics_mut(&mut node.generics);
+ v.visit_data_mut(&mut node.data);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_mut<V>(v: &mut V, node: &mut Expr)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Expr::Array(_binding_0) => {
+ full!(v.visit_expr_array_mut(_binding_0));
+ }
+ Expr::Assign(_binding_0) => {
+ full!(v.visit_expr_assign_mut(_binding_0));
+ }
+ Expr::AssignOp(_binding_0) => {
+ full!(v.visit_expr_assign_op_mut(_binding_0));
+ }
+ Expr::Async(_binding_0) => {
+ full!(v.visit_expr_async_mut(_binding_0));
+ }
+ Expr::Await(_binding_0) => {
+ full!(v.visit_expr_await_mut(_binding_0));
+ }
+ Expr::Binary(_binding_0) => {
+ v.visit_expr_binary_mut(_binding_0);
+ }
+ Expr::Block(_binding_0) => {
+ full!(v.visit_expr_block_mut(_binding_0));
+ }
+ Expr::Box(_binding_0) => {
+ full!(v.visit_expr_box_mut(_binding_0));
+ }
+ Expr::Break(_binding_0) => {
+ full!(v.visit_expr_break_mut(_binding_0));
+ }
+ Expr::Call(_binding_0) => {
+ v.visit_expr_call_mut(_binding_0);
+ }
+ Expr::Cast(_binding_0) => {
+ v.visit_expr_cast_mut(_binding_0);
+ }
+ Expr::Closure(_binding_0) => {
+ full!(v.visit_expr_closure_mut(_binding_0));
+ }
+ Expr::Continue(_binding_0) => {
+ full!(v.visit_expr_continue_mut(_binding_0));
+ }
+ Expr::Field(_binding_0) => {
+ v.visit_expr_field_mut(_binding_0);
+ }
+ Expr::ForLoop(_binding_0) => {
+ full!(v.visit_expr_for_loop_mut(_binding_0));
+ }
+ Expr::Group(_binding_0) => {
+ full!(v.visit_expr_group_mut(_binding_0));
+ }
+ Expr::If(_binding_0) => {
+ full!(v.visit_expr_if_mut(_binding_0));
+ }
+ Expr::Index(_binding_0) => {
+ v.visit_expr_index_mut(_binding_0);
+ }
+ Expr::Let(_binding_0) => {
+ full!(v.visit_expr_let_mut(_binding_0));
+ }
+ Expr::Lit(_binding_0) => {
+ v.visit_expr_lit_mut(_binding_0);
+ }
+ Expr::Loop(_binding_0) => {
+ full!(v.visit_expr_loop_mut(_binding_0));
+ }
+ Expr::Macro(_binding_0) => {
+ full!(v.visit_expr_macro_mut(_binding_0));
+ }
+ Expr::Match(_binding_0) => {
+ full!(v.visit_expr_match_mut(_binding_0));
+ }
+ Expr::MethodCall(_binding_0) => {
+ full!(v.visit_expr_method_call_mut(_binding_0));
+ }
+ Expr::Paren(_binding_0) => {
+ v.visit_expr_paren_mut(_binding_0);
+ }
+ Expr::Path(_binding_0) => {
+ v.visit_expr_path_mut(_binding_0);
+ }
+ Expr::Range(_binding_0) => {
+ full!(v.visit_expr_range_mut(_binding_0));
+ }
+ Expr::Reference(_binding_0) => {
+ full!(v.visit_expr_reference_mut(_binding_0));
+ }
+ Expr::Repeat(_binding_0) => {
+ full!(v.visit_expr_repeat_mut(_binding_0));
+ }
+ Expr::Return(_binding_0) => {
+ full!(v.visit_expr_return_mut(_binding_0));
+ }
+ Expr::Struct(_binding_0) => {
+ full!(v.visit_expr_struct_mut(_binding_0));
+ }
+ Expr::Try(_binding_0) => {
+ full!(v.visit_expr_try_mut(_binding_0));
+ }
+ Expr::TryBlock(_binding_0) => {
+ full!(v.visit_expr_try_block_mut(_binding_0));
+ }
+ Expr::Tuple(_binding_0) => {
+ full!(v.visit_expr_tuple_mut(_binding_0));
+ }
+ Expr::Type(_binding_0) => {
+ full!(v.visit_expr_type_mut(_binding_0));
+ }
+ Expr::Unary(_binding_0) => {
+ v.visit_expr_unary_mut(_binding_0);
+ }
+ Expr::Unsafe(_binding_0) => {
+ full!(v.visit_expr_unsafe_mut(_binding_0));
+ }
+ Expr::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ Expr::While(_binding_0) => {
+ full!(v.visit_expr_while_mut(_binding_0));
+ }
+ Expr::Yield(_binding_0) => {
+ full!(v.visit_expr_yield_mut(_binding_0));
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_array_mut<V>(v: &mut V, node: &mut ExprArray)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.bracket_token.span);
+ for el in Punctuated::pairs_mut(&mut node.elems) {
+ let (it, p) = el.into_tuple();
+ v.visit_expr_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_assign_mut<V>(v: &mut V, node: &mut ExprAssign)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.left);
+ tokens_helper(v, &mut node.eq_token.spans);
+ v.visit_expr_mut(&mut *node.right);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_assign_op_mut<V>(v: &mut V, node: &mut ExprAssignOp)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.left);
+ v.visit_bin_op_mut(&mut node.op);
+ v.visit_expr_mut(&mut *node.right);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_async_mut<V>(v: &mut V, node: &mut ExprAsync)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.async_token.span);
+ if let Some(it) = &mut node.capture {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_block_mut(&mut node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_await_mut<V>(v: &mut V, node: &mut ExprAwait)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.base);
+ tokens_helper(v, &mut node.dot_token.spans);
+ tokens_helper(v, &mut node.await_token.span);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_binary_mut<V>(v: &mut V, node: &mut ExprBinary)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.left);
+ v.visit_bin_op_mut(&mut node.op);
+ v.visit_expr_mut(&mut *node.right);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_block_mut<V>(v: &mut V, node: &mut ExprBlock)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.label {
+ v.visit_label_mut(it);
+ }
+ v.visit_block_mut(&mut node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_box_mut<V>(v: &mut V, node: &mut ExprBox)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.box_token.span);
+ v.visit_expr_mut(&mut *node.expr);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_break_mut<V>(v: &mut V, node: &mut ExprBreak)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.break_token.span);
+ if let Some(it) = &mut node.label {
+ v.visit_lifetime_mut(it);
+ }
+ if let Some(it) = &mut node.expr {
+ v.visit_expr_mut(&mut **it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_call_mut<V>(v: &mut V, node: &mut ExprCall)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.func);
+ tokens_helper(v, &mut node.paren_token.span);
+ for el in Punctuated::pairs_mut(&mut node.args) {
+ let (it, p) = el.into_tuple();
+ v.visit_expr_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_cast_mut<V>(v: &mut V, node: &mut ExprCast)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.expr);
+ tokens_helper(v, &mut node.as_token.span);
+ v.visit_type_mut(&mut *node.ty);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_closure_mut<V>(v: &mut V, node: &mut ExprClosure)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.movability {
+ tokens_helper(v, &mut it.span);
+ }
+ if let Some(it) = &mut node.asyncness {
+ tokens_helper(v, &mut it.span);
+ }
+ if let Some(it) = &mut node.capture {
+ tokens_helper(v, &mut it.span);
+ }
+ tokens_helper(v, &mut node.or1_token.spans);
+ for el in Punctuated::pairs_mut(&mut node.inputs) {
+ let (it, p) = el.into_tuple();
+ v.visit_pat_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ tokens_helper(v, &mut node.or2_token.spans);
+ v.visit_return_type_mut(&mut node.output);
+ v.visit_expr_mut(&mut *node.body);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_continue_mut<V>(v: &mut V, node: &mut ExprContinue)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.continue_token.span);
+ if let Some(it) = &mut node.label {
+ v.visit_lifetime_mut(it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_field_mut<V>(v: &mut V, node: &mut ExprField)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.base);
+ tokens_helper(v, &mut node.dot_token.spans);
+ v.visit_member_mut(&mut node.member);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_for_loop_mut<V>(v: &mut V, node: &mut ExprForLoop)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.label {
+ v.visit_label_mut(it);
+ }
+ tokens_helper(v, &mut node.for_token.span);
+ v.visit_pat_mut(&mut node.pat);
+ tokens_helper(v, &mut node.in_token.span);
+ v.visit_expr_mut(&mut *node.expr);
+ v.visit_block_mut(&mut node.body);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_group_mut<V>(v: &mut V, node: &mut ExprGroup)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.group_token.span);
+ v.visit_expr_mut(&mut *node.expr);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_if_mut<V>(v: &mut V, node: &mut ExprIf)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.if_token.span);
+ v.visit_expr_mut(&mut *node.cond);
+ v.visit_block_mut(&mut node.then_branch);
+ if let Some(it) = &mut node.else_branch {
+ tokens_helper(v, &mut (it).0.span);
+ v.visit_expr_mut(&mut *(it).1);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_index_mut<V>(v: &mut V, node: &mut ExprIndex)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.expr);
+ tokens_helper(v, &mut node.bracket_token.span);
+ v.visit_expr_mut(&mut *node.index);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_let_mut<V>(v: &mut V, node: &mut ExprLet)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.let_token.span);
+ v.visit_pat_mut(&mut node.pat);
+ tokens_helper(v, &mut node.eq_token.spans);
+ v.visit_expr_mut(&mut *node.expr);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_lit_mut<V>(v: &mut V, node: &mut ExprLit)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_lit_mut(&mut node.lit);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_loop_mut<V>(v: &mut V, node: &mut ExprLoop)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.label {
+ v.visit_label_mut(it);
+ }
+ tokens_helper(v, &mut node.loop_token.span);
+ v.visit_block_mut(&mut node.body);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_macro_mut<V>(v: &mut V, node: &mut ExprMacro)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_macro_mut(&mut node.mac);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_match_mut<V>(v: &mut V, node: &mut ExprMatch)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.match_token.span);
+ v.visit_expr_mut(&mut *node.expr);
+ tokens_helper(v, &mut node.brace_token.span);
+ for it in &mut node.arms {
+ v.visit_arm_mut(it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_method_call_mut<V>(v: &mut V, node: &mut ExprMethodCall)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.receiver);
+ tokens_helper(v, &mut node.dot_token.spans);
+ v.visit_ident_mut(&mut node.method);
+ if let Some(it) = &mut node.turbofish {
+ v.visit_method_turbofish_mut(it);
+ }
+ tokens_helper(v, &mut node.paren_token.span);
+ for el in Punctuated::pairs_mut(&mut node.args) {
+ let (it, p) = el.into_tuple();
+ v.visit_expr_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_paren_mut<V>(v: &mut V, node: &mut ExprParen)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.paren_token.span);
+ v.visit_expr_mut(&mut *node.expr);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_path_mut<V>(v: &mut V, node: &mut ExprPath)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.qself {
+ v.visit_qself_mut(it);
+ }
+ v.visit_path_mut(&mut node.path);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_range_mut<V>(v: &mut V, node: &mut ExprRange)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.from {
+ v.visit_expr_mut(&mut **it);
+ }
+ v.visit_range_limits_mut(&mut node.limits);
+ if let Some(it) = &mut node.to {
+ v.visit_expr_mut(&mut **it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_reference_mut<V>(v: &mut V, node: &mut ExprReference)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.and_token.spans);
+ if let Some(it) = &mut node.mutability {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_expr_mut(&mut *node.expr);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_repeat_mut<V>(v: &mut V, node: &mut ExprRepeat)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.bracket_token.span);
+ v.visit_expr_mut(&mut *node.expr);
+ tokens_helper(v, &mut node.semi_token.spans);
+ v.visit_expr_mut(&mut *node.len);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_return_mut<V>(v: &mut V, node: &mut ExprReturn)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.return_token.span);
+ if let Some(it) = &mut node.expr {
+ v.visit_expr_mut(&mut **it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_struct_mut<V>(v: &mut V, node: &mut ExprStruct)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_path_mut(&mut node.path);
+ tokens_helper(v, &mut node.brace_token.span);
+ for el in Punctuated::pairs_mut(&mut node.fields) {
+ let (it, p) = el.into_tuple();
+ v.visit_field_value_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ if let Some(it) = &mut node.dot2_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ if let Some(it) = &mut node.rest {
+ v.visit_expr_mut(&mut **it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_try_mut<V>(v: &mut V, node: &mut ExprTry)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.expr);
+ tokens_helper(v, &mut node.question_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_try_block_mut<V>(v: &mut V, node: &mut ExprTryBlock)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.try_token.span);
+ v.visit_block_mut(&mut node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_tuple_mut<V>(v: &mut V, node: &mut ExprTuple)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.paren_token.span);
+ for el in Punctuated::pairs_mut(&mut node.elems) {
+ let (it, p) = el.into_tuple();
+ v.visit_expr_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_type_mut<V>(v: &mut V, node: &mut ExprType)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.expr);
+ tokens_helper(v, &mut node.colon_token.spans);
+ v.visit_type_mut(&mut *node.ty);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_expr_unary_mut<V>(v: &mut V, node: &mut ExprUnary)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_un_op_mut(&mut node.op);
+ v.visit_expr_mut(&mut *node.expr);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_unsafe_mut<V>(v: &mut V, node: &mut ExprUnsafe)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.unsafe_token.span);
+ v.visit_block_mut(&mut node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_while_mut<V>(v: &mut V, node: &mut ExprWhile)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.label {
+ v.visit_label_mut(it);
+ }
+ tokens_helper(v, &mut node.while_token.span);
+ v.visit_expr_mut(&mut *node.cond);
+ v.visit_block_mut(&mut node.body);
+}
+#[cfg(feature = "full")]
+pub fn visit_expr_yield_mut<V>(v: &mut V, node: &mut ExprYield)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.yield_token.span);
+ if let Some(it) = &mut node.expr {
+ v.visit_expr_mut(&mut **it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_field_mut<V>(v: &mut V, node: &mut Field)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ if let Some(it) = &mut node.ident {
+ v.visit_ident_mut(it);
+ }
+ if let Some(it) = &mut node.colon_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ v.visit_type_mut(&mut node.ty);
+}
+#[cfg(feature = "full")]
+pub fn visit_field_pat_mut<V>(v: &mut V, node: &mut FieldPat)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_member_mut(&mut node.member);
+ if let Some(it) = &mut node.colon_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ v.visit_pat_mut(&mut *node.pat);
+}
+#[cfg(feature = "full")]
+pub fn visit_field_value_mut<V>(v: &mut V, node: &mut FieldValue)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_member_mut(&mut node.member);
+ if let Some(it) = &mut node.colon_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ v.visit_expr_mut(&mut node.expr);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_fields_mut<V>(v: &mut V, node: &mut Fields)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Fields::Named(_binding_0) => {
+ v.visit_fields_named_mut(_binding_0);
+ }
+ Fields::Unnamed(_binding_0) => {
+ v.visit_fields_unnamed_mut(_binding_0);
+ }
+ Fields::Unit => {}
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_fields_named_mut<V>(v: &mut V, node: &mut FieldsNamed)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.brace_token.span);
+ for el in Punctuated::pairs_mut(&mut node.named) {
+ let (it, p) = el.into_tuple();
+ v.visit_field_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_fields_unnamed_mut<V>(v: &mut V, node: &mut FieldsUnnamed)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.paren_token.span);
+ for el in Punctuated::pairs_mut(&mut node.unnamed) {
+ let (it, p) = el.into_tuple();
+ v.visit_field_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_file_mut<V>(v: &mut V, node: &mut File)
+where
+ V: VisitMut + ?Sized,
+{
+ skip!(node.shebang);
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ for it in &mut node.items {
+ v.visit_item_mut(it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_fn_arg_mut<V>(v: &mut V, node: &mut FnArg)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ FnArg::Receiver(_binding_0) => {
+ v.visit_receiver_mut(_binding_0);
+ }
+ FnArg::Typed(_binding_0) => {
+ v.visit_pat_type_mut(_binding_0);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_foreign_item_mut<V>(v: &mut V, node: &mut ForeignItem)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ ForeignItem::Fn(_binding_0) => {
+ v.visit_foreign_item_fn_mut(_binding_0);
+ }
+ ForeignItem::Static(_binding_0) => {
+ v.visit_foreign_item_static_mut(_binding_0);
+ }
+ ForeignItem::Type(_binding_0) => {
+ v.visit_foreign_item_type_mut(_binding_0);
+ }
+ ForeignItem::Macro(_binding_0) => {
+ v.visit_foreign_item_macro_mut(_binding_0);
+ }
+ ForeignItem::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_foreign_item_fn_mut<V>(v: &mut V, node: &mut ForeignItemFn)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ v.visit_signature_mut(&mut node.sig);
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_foreign_item_macro_mut<V>(v: &mut V, node: &mut ForeignItemMacro)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_macro_mut(&mut node.mac);
+ if let Some(it) = &mut node.semi_token {
+ tokens_helper(v, &mut it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_foreign_item_static_mut<V>(v: &mut V, node: &mut ForeignItemStatic)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.static_token.span);
+ if let Some(it) = &mut node.mutability {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.colon_token.spans);
+ v.visit_type_mut(&mut *node.ty);
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_foreign_item_type_mut<V>(v: &mut V, node: &mut ForeignItemType)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.type_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_generic_argument_mut<V>(v: &mut V, node: &mut GenericArgument)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ GenericArgument::Lifetime(_binding_0) => {
+ v.visit_lifetime_mut(_binding_0);
+ }
+ GenericArgument::Type(_binding_0) => {
+ v.visit_type_mut(_binding_0);
+ }
+ GenericArgument::Const(_binding_0) => {
+ v.visit_expr_mut(_binding_0);
+ }
+ GenericArgument::Binding(_binding_0) => {
+ v.visit_binding_mut(_binding_0);
+ }
+ GenericArgument::Constraint(_binding_0) => {
+ v.visit_constraint_mut(_binding_0);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_generic_method_argument_mut<V>(v: &mut V, node: &mut GenericMethodArgument)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ GenericMethodArgument::Type(_binding_0) => {
+ v.visit_type_mut(_binding_0);
+ }
+ GenericMethodArgument::Const(_binding_0) => {
+ v.visit_expr_mut(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_generic_param_mut<V>(v: &mut V, node: &mut GenericParam)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ GenericParam::Type(_binding_0) => {
+ v.visit_type_param_mut(_binding_0);
+ }
+ GenericParam::Lifetime(_binding_0) => {
+ v.visit_lifetime_def_mut(_binding_0);
+ }
+ GenericParam::Const(_binding_0) => {
+ v.visit_const_param_mut(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_generics_mut<V>(v: &mut V, node: &mut Generics)
+where
+ V: VisitMut + ?Sized,
+{
+ if let Some(it) = &mut node.lt_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ for el in Punctuated::pairs_mut(&mut node.params) {
+ let (it, p) = el.into_tuple();
+ v.visit_generic_param_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ if let Some(it) = &mut node.gt_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ if let Some(it) = &mut node.where_clause {
+ v.visit_where_clause_mut(it);
+ }
+}
+pub fn visit_ident_mut<V>(v: &mut V, node: &mut Ident)
+where
+ V: VisitMut + ?Sized,
+{
+ let mut span = node.span();
+ v.visit_span_mut(&mut span);
+ node.set_span(span);
+}
+#[cfg(feature = "full")]
+pub fn visit_impl_item_mut<V>(v: &mut V, node: &mut ImplItem)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ ImplItem::Const(_binding_0) => {
+ v.visit_impl_item_const_mut(_binding_0);
+ }
+ ImplItem::Method(_binding_0) => {
+ v.visit_impl_item_method_mut(_binding_0);
+ }
+ ImplItem::Type(_binding_0) => {
+ v.visit_impl_item_type_mut(_binding_0);
+ }
+ ImplItem::Macro(_binding_0) => {
+ v.visit_impl_item_macro_mut(_binding_0);
+ }
+ ImplItem::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_impl_item_const_mut<V>(v: &mut V, node: &mut ImplItemConst)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ if let Some(it) = &mut node.defaultness {
+ tokens_helper(v, &mut it.span);
+ }
+ tokens_helper(v, &mut node.const_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.colon_token.spans);
+ v.visit_type_mut(&mut node.ty);
+ tokens_helper(v, &mut node.eq_token.spans);
+ v.visit_expr_mut(&mut node.expr);
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_impl_item_macro_mut<V>(v: &mut V, node: &mut ImplItemMacro)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_macro_mut(&mut node.mac);
+ if let Some(it) = &mut node.semi_token {
+ tokens_helper(v, &mut it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_impl_item_method_mut<V>(v: &mut V, node: &mut ImplItemMethod)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ if let Some(it) = &mut node.defaultness {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_signature_mut(&mut node.sig);
+ v.visit_block_mut(&mut node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_impl_item_type_mut<V>(v: &mut V, node: &mut ImplItemType)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ if let Some(it) = &mut node.defaultness {
+ tokens_helper(v, &mut it.span);
+ }
+ tokens_helper(v, &mut node.type_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_generics_mut(&mut node.generics);
+ tokens_helper(v, &mut node.eq_token.spans);
+ v.visit_type_mut(&mut node.ty);
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_index_mut<V>(v: &mut V, node: &mut Index)
+where
+ V: VisitMut + ?Sized,
+{
+ skip!(node.index);
+ v.visit_span_mut(&mut node.span);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_mut<V>(v: &mut V, node: &mut Item)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Item::Const(_binding_0) => {
+ v.visit_item_const_mut(_binding_0);
+ }
+ Item::Enum(_binding_0) => {
+ v.visit_item_enum_mut(_binding_0);
+ }
+ Item::ExternCrate(_binding_0) => {
+ v.visit_item_extern_crate_mut(_binding_0);
+ }
+ Item::Fn(_binding_0) => {
+ v.visit_item_fn_mut(_binding_0);
+ }
+ Item::ForeignMod(_binding_0) => {
+ v.visit_item_foreign_mod_mut(_binding_0);
+ }
+ Item::Impl(_binding_0) => {
+ v.visit_item_impl_mut(_binding_0);
+ }
+ Item::Macro(_binding_0) => {
+ v.visit_item_macro_mut(_binding_0);
+ }
+ Item::Macro2(_binding_0) => {
+ v.visit_item_macro2_mut(_binding_0);
+ }
+ Item::Mod(_binding_0) => {
+ v.visit_item_mod_mut(_binding_0);
+ }
+ Item::Static(_binding_0) => {
+ v.visit_item_static_mut(_binding_0);
+ }
+ Item::Struct(_binding_0) => {
+ v.visit_item_struct_mut(_binding_0);
+ }
+ Item::Trait(_binding_0) => {
+ v.visit_item_trait_mut(_binding_0);
+ }
+ Item::TraitAlias(_binding_0) => {
+ v.visit_item_trait_alias_mut(_binding_0);
+ }
+ Item::Type(_binding_0) => {
+ v.visit_item_type_mut(_binding_0);
+ }
+ Item::Union(_binding_0) => {
+ v.visit_item_union_mut(_binding_0);
+ }
+ Item::Use(_binding_0) => {
+ v.visit_item_use_mut(_binding_0);
+ }
+ Item::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_const_mut<V>(v: &mut V, node: &mut ItemConst)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.const_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.colon_token.spans);
+ v.visit_type_mut(&mut *node.ty);
+ tokens_helper(v, &mut node.eq_token.spans);
+ v.visit_expr_mut(&mut *node.expr);
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_enum_mut<V>(v: &mut V, node: &mut ItemEnum)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.enum_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_generics_mut(&mut node.generics);
+ tokens_helper(v, &mut node.brace_token.span);
+ for el in Punctuated::pairs_mut(&mut node.variants) {
+ let (it, p) = el.into_tuple();
+ v.visit_variant_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_extern_crate_mut<V>(v: &mut V, node: &mut ItemExternCrate)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.extern_token.span);
+ tokens_helper(v, &mut node.crate_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ if let Some(it) = &mut node.rename {
+ tokens_helper(v, &mut (it).0.span);
+ v.visit_ident_mut(&mut (it).1);
+ }
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_fn_mut<V>(v: &mut V, node: &mut ItemFn)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ v.visit_signature_mut(&mut node.sig);
+ v.visit_block_mut(&mut *node.block);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_foreign_mod_mut<V>(v: &mut V, node: &mut ItemForeignMod)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_abi_mut(&mut node.abi);
+ tokens_helper(v, &mut node.brace_token.span);
+ for it in &mut node.items {
+ v.visit_foreign_item_mut(it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_impl_mut<V>(v: &mut V, node: &mut ItemImpl)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.defaultness {
+ tokens_helper(v, &mut it.span);
+ }
+ if let Some(it) = &mut node.unsafety {
+ tokens_helper(v, &mut it.span);
+ }
+ tokens_helper(v, &mut node.impl_token.span);
+ v.visit_generics_mut(&mut node.generics);
+ if let Some(it) = &mut node.trait_ {
+ if let Some(it) = &mut (it).0 {
+ tokens_helper(v, &mut it.spans);
+ }
+ v.visit_path_mut(&mut (it).1);
+ tokens_helper(v, &mut (it).2.span);
+ }
+ v.visit_type_mut(&mut *node.self_ty);
+ tokens_helper(v, &mut node.brace_token.span);
+ for it in &mut node.items {
+ v.visit_impl_item_mut(it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_macro_mut<V>(v: &mut V, node: &mut ItemMacro)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.ident {
+ v.visit_ident_mut(it);
+ }
+ v.visit_macro_mut(&mut node.mac);
+ if let Some(it) = &mut node.semi_token {
+ tokens_helper(v, &mut it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_macro2_mut<V>(v: &mut V, node: &mut ItemMacro2)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.macro_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ skip!(node.rules);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_mod_mut<V>(v: &mut V, node: &mut ItemMod)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.mod_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ if let Some(it) = &mut node.content {
+ tokens_helper(v, &mut (it).0.span);
+ for it in &mut (it).1 {
+ v.visit_item_mut(it);
+ }
+ }
+ if let Some(it) = &mut node.semi {
+ tokens_helper(v, &mut it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_static_mut<V>(v: &mut V, node: &mut ItemStatic)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.static_token.span);
+ if let Some(it) = &mut node.mutability {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.colon_token.spans);
+ v.visit_type_mut(&mut *node.ty);
+ tokens_helper(v, &mut node.eq_token.spans);
+ v.visit_expr_mut(&mut *node.expr);
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_struct_mut<V>(v: &mut V, node: &mut ItemStruct)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.struct_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_generics_mut(&mut node.generics);
+ v.visit_fields_mut(&mut node.fields);
+ if let Some(it) = &mut node.semi_token {
+ tokens_helper(v, &mut it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_trait_mut<V>(v: &mut V, node: &mut ItemTrait)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ if let Some(it) = &mut node.unsafety {
+ tokens_helper(v, &mut it.span);
+ }
+ if let Some(it) = &mut node.auto_token {
+ tokens_helper(v, &mut it.span);
+ }
+ tokens_helper(v, &mut node.trait_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_generics_mut(&mut node.generics);
+ if let Some(it) = &mut node.colon_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ for el in Punctuated::pairs_mut(&mut node.supertraits) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ tokens_helper(v, &mut node.brace_token.span);
+ for it in &mut node.items {
+ v.visit_trait_item_mut(it);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_item_trait_alias_mut<V>(v: &mut V, node: &mut ItemTraitAlias)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.trait_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_generics_mut(&mut node.generics);
+ tokens_helper(v, &mut node.eq_token.spans);
+ for el in Punctuated::pairs_mut(&mut node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_type_mut<V>(v: &mut V, node: &mut ItemType)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.type_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_generics_mut(&mut node.generics);
+ tokens_helper(v, &mut node.eq_token.spans);
+ v.visit_type_mut(&mut *node.ty);
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_union_mut<V>(v: &mut V, node: &mut ItemUnion)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.union_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_generics_mut(&mut node.generics);
+ v.visit_fields_named_mut(&mut node.fields);
+}
+#[cfg(feature = "full")]
+pub fn visit_item_use_mut<V>(v: &mut V, node: &mut ItemUse)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_visibility_mut(&mut node.vis);
+ tokens_helper(v, &mut node.use_token.span);
+ if let Some(it) = &mut node.leading_colon {
+ tokens_helper(v, &mut it.spans);
+ }
+ v.visit_use_tree_mut(&mut node.tree);
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_label_mut<V>(v: &mut V, node: &mut Label)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_lifetime_mut(&mut node.name);
+ tokens_helper(v, &mut node.colon_token.spans);
+}
+pub fn visit_lifetime_mut<V>(v: &mut V, node: &mut Lifetime)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_span_mut(&mut node.apostrophe);
+ v.visit_ident_mut(&mut node.ident);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_lifetime_def_mut<V>(v: &mut V, node: &mut LifetimeDef)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_lifetime_mut(&mut node.lifetime);
+ if let Some(it) = &mut node.colon_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ for el in Punctuated::pairs_mut(&mut node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_lifetime_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+pub fn visit_lit_mut<V>(v: &mut V, node: &mut Lit)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Lit::Str(_binding_0) => {
+ v.visit_lit_str_mut(_binding_0);
+ }
+ Lit::ByteStr(_binding_0) => {
+ v.visit_lit_byte_str_mut(_binding_0);
+ }
+ Lit::Byte(_binding_0) => {
+ v.visit_lit_byte_mut(_binding_0);
+ }
+ Lit::Char(_binding_0) => {
+ v.visit_lit_char_mut(_binding_0);
+ }
+ Lit::Int(_binding_0) => {
+ v.visit_lit_int_mut(_binding_0);
+ }
+ Lit::Float(_binding_0) => {
+ v.visit_lit_float_mut(_binding_0);
+ }
+ Lit::Bool(_binding_0) => {
+ v.visit_lit_bool_mut(_binding_0);
+ }
+ Lit::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ }
+}
+pub fn visit_lit_bool_mut<V>(v: &mut V, node: &mut LitBool)
+where
+ V: VisitMut + ?Sized,
+{
+ skip!(node.value);
+ v.visit_span_mut(&mut node.span);
+}
+pub fn visit_lit_byte_mut<V>(v: &mut V, node: &mut LitByte)
+where
+ V: VisitMut + ?Sized,
+{}
+pub fn visit_lit_byte_str_mut<V>(v: &mut V, node: &mut LitByteStr)
+where
+ V: VisitMut + ?Sized,
+{}
+pub fn visit_lit_char_mut<V>(v: &mut V, node: &mut LitChar)
+where
+ V: VisitMut + ?Sized,
+{}
+pub fn visit_lit_float_mut<V>(v: &mut V, node: &mut LitFloat)
+where
+ V: VisitMut + ?Sized,
+{}
+pub fn visit_lit_int_mut<V>(v: &mut V, node: &mut LitInt)
+where
+ V: VisitMut + ?Sized,
+{}
+pub fn visit_lit_str_mut<V>(v: &mut V, node: &mut LitStr)
+where
+ V: VisitMut + ?Sized,
+{}
+#[cfg(feature = "full")]
+pub fn visit_local_mut<V>(v: &mut V, node: &mut Local)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.let_token.span);
+ v.visit_pat_mut(&mut node.pat);
+ if let Some(it) = &mut node.init {
+ tokens_helper(v, &mut (it).0.spans);
+ v.visit_expr_mut(&mut *(it).1);
+ }
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_macro_mut<V>(v: &mut V, node: &mut Macro)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_path_mut(&mut node.path);
+ tokens_helper(v, &mut node.bang_token.spans);
+ v.visit_macro_delimiter_mut(&mut node.delimiter);
+ skip!(node.tokens);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_macro_delimiter_mut<V>(v: &mut V, node: &mut MacroDelimiter)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ MacroDelimiter::Paren(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.span);
+ }
+ MacroDelimiter::Brace(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.span);
+ }
+ MacroDelimiter::Bracket(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.span);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_member_mut<V>(v: &mut V, node: &mut Member)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Member::Named(_binding_0) => {
+ v.visit_ident_mut(_binding_0);
+ }
+ Member::Unnamed(_binding_0) => {
+ v.visit_index_mut(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_meta_mut<V>(v: &mut V, node: &mut Meta)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Meta::Path(_binding_0) => {
+ v.visit_path_mut(_binding_0);
+ }
+ Meta::List(_binding_0) => {
+ v.visit_meta_list_mut(_binding_0);
+ }
+ Meta::NameValue(_binding_0) => {
+ v.visit_meta_name_value_mut(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_meta_list_mut<V>(v: &mut V, node: &mut MetaList)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_path_mut(&mut node.path);
+ tokens_helper(v, &mut node.paren_token.span);
+ for el in Punctuated::pairs_mut(&mut node.nested) {
+ let (it, p) = el.into_tuple();
+ v.visit_nested_meta_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_meta_name_value_mut<V>(v: &mut V, node: &mut MetaNameValue)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_path_mut(&mut node.path);
+ tokens_helper(v, &mut node.eq_token.spans);
+ v.visit_lit_mut(&mut node.lit);
+}
+#[cfg(feature = "full")]
+pub fn visit_method_turbofish_mut<V>(v: &mut V, node: &mut MethodTurbofish)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.colon2_token.spans);
+ tokens_helper(v, &mut node.lt_token.spans);
+ for el in Punctuated::pairs_mut(&mut node.args) {
+ let (it, p) = el.into_tuple();
+ v.visit_generic_method_argument_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ tokens_helper(v, &mut node.gt_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_nested_meta_mut<V>(v: &mut V, node: &mut NestedMeta)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ NestedMeta::Meta(_binding_0) => {
+ v.visit_meta_mut(_binding_0);
+ }
+ NestedMeta::Lit(_binding_0) => {
+ v.visit_lit_mut(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_parenthesized_generic_arguments_mut<V>(
+ v: &mut V,
+ node: &mut ParenthesizedGenericArguments,
+)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.paren_token.span);
+ for el in Punctuated::pairs_mut(&mut node.inputs) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ v.visit_return_type_mut(&mut node.output);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_mut<V>(v: &mut V, node: &mut Pat)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Pat::Box(_binding_0) => {
+ v.visit_pat_box_mut(_binding_0);
+ }
+ Pat::Ident(_binding_0) => {
+ v.visit_pat_ident_mut(_binding_0);
+ }
+ Pat::Lit(_binding_0) => {
+ v.visit_pat_lit_mut(_binding_0);
+ }
+ Pat::Macro(_binding_0) => {
+ v.visit_pat_macro_mut(_binding_0);
+ }
+ Pat::Or(_binding_0) => {
+ v.visit_pat_or_mut(_binding_0);
+ }
+ Pat::Path(_binding_0) => {
+ v.visit_pat_path_mut(_binding_0);
+ }
+ Pat::Range(_binding_0) => {
+ v.visit_pat_range_mut(_binding_0);
+ }
+ Pat::Reference(_binding_0) => {
+ v.visit_pat_reference_mut(_binding_0);
+ }
+ Pat::Rest(_binding_0) => {
+ v.visit_pat_rest_mut(_binding_0);
+ }
+ Pat::Slice(_binding_0) => {
+ v.visit_pat_slice_mut(_binding_0);
+ }
+ Pat::Struct(_binding_0) => {
+ v.visit_pat_struct_mut(_binding_0);
+ }
+ Pat::Tuple(_binding_0) => {
+ v.visit_pat_tuple_mut(_binding_0);
+ }
+ Pat::TupleStruct(_binding_0) => {
+ v.visit_pat_tuple_struct_mut(_binding_0);
+ }
+ Pat::Type(_binding_0) => {
+ v.visit_pat_type_mut(_binding_0);
+ }
+ Pat::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ Pat::Wild(_binding_0) => {
+ v.visit_pat_wild_mut(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_box_mut<V>(v: &mut V, node: &mut PatBox)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.box_token.span);
+ v.visit_pat_mut(&mut *node.pat);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_ident_mut<V>(v: &mut V, node: &mut PatIdent)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.by_ref {
+ tokens_helper(v, &mut it.span);
+ }
+ if let Some(it) = &mut node.mutability {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_ident_mut(&mut node.ident);
+ if let Some(it) = &mut node.subpat {
+ tokens_helper(v, &mut (it).0.spans);
+ v.visit_pat_mut(&mut *(it).1);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_lit_mut<V>(v: &mut V, node: &mut PatLit)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.expr);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_macro_mut<V>(v: &mut V, node: &mut PatMacro)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_macro_mut(&mut node.mac);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_or_mut<V>(v: &mut V, node: &mut PatOr)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.leading_vert {
+ tokens_helper(v, &mut it.spans);
+ }
+ for el in Punctuated::pairs_mut(&mut node.cases) {
+ let (it, p) = el.into_tuple();
+ v.visit_pat_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_path_mut<V>(v: &mut V, node: &mut PatPath)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.qself {
+ v.visit_qself_mut(it);
+ }
+ v.visit_path_mut(&mut node.path);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_range_mut<V>(v: &mut V, node: &mut PatRange)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_expr_mut(&mut *node.lo);
+ v.visit_range_limits_mut(&mut node.limits);
+ v.visit_expr_mut(&mut *node.hi);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_reference_mut<V>(v: &mut V, node: &mut PatReference)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.and_token.spans);
+ if let Some(it) = &mut node.mutability {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_pat_mut(&mut *node.pat);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_rest_mut<V>(v: &mut V, node: &mut PatRest)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.dot2_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_slice_mut<V>(v: &mut V, node: &mut PatSlice)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.bracket_token.span);
+ for el in Punctuated::pairs_mut(&mut node.elems) {
+ let (it, p) = el.into_tuple();
+ v.visit_pat_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_struct_mut<V>(v: &mut V, node: &mut PatStruct)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_path_mut(&mut node.path);
+ tokens_helper(v, &mut node.brace_token.span);
+ for el in Punctuated::pairs_mut(&mut node.fields) {
+ let (it, p) = el.into_tuple();
+ v.visit_field_pat_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ if let Some(it) = &mut node.dot2_token {
+ tokens_helper(v, &mut it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_tuple_mut<V>(v: &mut V, node: &mut PatTuple)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.paren_token.span);
+ for el in Punctuated::pairs_mut(&mut node.elems) {
+ let (it, p) = el.into_tuple();
+ v.visit_pat_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_tuple_struct_mut<V>(v: &mut V, node: &mut PatTupleStruct)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_path_mut(&mut node.path);
+ v.visit_pat_tuple_mut(&mut node.pat);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_type_mut<V>(v: &mut V, node: &mut PatType)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_pat_mut(&mut *node.pat);
+ tokens_helper(v, &mut node.colon_token.spans);
+ v.visit_type_mut(&mut *node.ty);
+}
+#[cfg(feature = "full")]
+pub fn visit_pat_wild_mut<V>(v: &mut V, node: &mut PatWild)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.underscore_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_path_mut<V>(v: &mut V, node: &mut Path)
+where
+ V: VisitMut + ?Sized,
+{
+ if let Some(it) = &mut node.leading_colon {
+ tokens_helper(v, &mut it.spans);
+ }
+ for el in Punctuated::pairs_mut(&mut node.segments) {
+ let (it, p) = el.into_tuple();
+ v.visit_path_segment_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_path_arguments_mut<V>(v: &mut V, node: &mut PathArguments)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ PathArguments::None => {}
+ PathArguments::AngleBracketed(_binding_0) => {
+ v.visit_angle_bracketed_generic_arguments_mut(_binding_0);
+ }
+ PathArguments::Parenthesized(_binding_0) => {
+ v.visit_parenthesized_generic_arguments_mut(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_path_segment_mut<V>(v: &mut V, node: &mut PathSegment)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_path_arguments_mut(&mut node.arguments);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_predicate_eq_mut<V>(v: &mut V, node: &mut PredicateEq)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_type_mut(&mut node.lhs_ty);
+ tokens_helper(v, &mut node.eq_token.spans);
+ v.visit_type_mut(&mut node.rhs_ty);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_predicate_lifetime_mut<V>(v: &mut V, node: &mut PredicateLifetime)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_lifetime_mut(&mut node.lifetime);
+ tokens_helper(v, &mut node.colon_token.spans);
+ for el in Punctuated::pairs_mut(&mut node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_lifetime_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_predicate_type_mut<V>(v: &mut V, node: &mut PredicateType)
+where
+ V: VisitMut + ?Sized,
+{
+ if let Some(it) = &mut node.lifetimes {
+ v.visit_bound_lifetimes_mut(it);
+ }
+ v.visit_type_mut(&mut node.bounded_ty);
+ tokens_helper(v, &mut node.colon_token.spans);
+ for el in Punctuated::pairs_mut(&mut node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_qself_mut<V>(v: &mut V, node: &mut QSelf)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.lt_token.spans);
+ v.visit_type_mut(&mut *node.ty);
+ skip!(node.position);
+ if let Some(it) = &mut node.as_token {
+ tokens_helper(v, &mut it.span);
+ }
+ tokens_helper(v, &mut node.gt_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_range_limits_mut<V>(v: &mut V, node: &mut RangeLimits)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ RangeLimits::HalfOpen(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ RangeLimits::Closed(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_receiver_mut<V>(v: &mut V, node: &mut Receiver)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ if let Some(it) = &mut node.reference {
+ tokens_helper(v, &mut (it).0.spans);
+ if let Some(it) = &mut (it).1 {
+ v.visit_lifetime_mut(it);
+ }
+ }
+ if let Some(it) = &mut node.mutability {
+ tokens_helper(v, &mut it.span);
+ }
+ tokens_helper(v, &mut node.self_token.span);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_return_type_mut<V>(v: &mut V, node: &mut ReturnType)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ ReturnType::Default => {}
+ ReturnType::Type(_binding_0, _binding_1) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ v.visit_type_mut(&mut **_binding_1);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_signature_mut<V>(v: &mut V, node: &mut Signature)
+where
+ V: VisitMut + ?Sized,
+{
+ if let Some(it) = &mut node.constness {
+ tokens_helper(v, &mut it.span);
+ }
+ if let Some(it) = &mut node.asyncness {
+ tokens_helper(v, &mut it.span);
+ }
+ if let Some(it) = &mut node.unsafety {
+ tokens_helper(v, &mut it.span);
+ }
+ if let Some(it) = &mut node.abi {
+ v.visit_abi_mut(it);
+ }
+ tokens_helper(v, &mut node.fn_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_generics_mut(&mut node.generics);
+ tokens_helper(v, &mut node.paren_token.span);
+ for el in Punctuated::pairs_mut(&mut node.inputs) {
+ let (it, p) = el.into_tuple();
+ v.visit_fn_arg_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ if let Some(it) = &mut node.variadic {
+ v.visit_variadic_mut(it);
+ }
+ v.visit_return_type_mut(&mut node.output);
+}
+pub fn visit_span_mut<V>(v: &mut V, node: &mut Span)
+where
+ V: VisitMut + ?Sized,
+{}
+#[cfg(feature = "full")]
+pub fn visit_stmt_mut<V>(v: &mut V, node: &mut Stmt)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Stmt::Local(_binding_0) => {
+ v.visit_local_mut(_binding_0);
+ }
+ Stmt::Item(_binding_0) => {
+ v.visit_item_mut(_binding_0);
+ }
+ Stmt::Expr(_binding_0) => {
+ v.visit_expr_mut(_binding_0);
+ }
+ Stmt::Semi(_binding_0, _binding_1) => {
+ v.visit_expr_mut(_binding_0);
+ tokens_helper(v, &mut _binding_1.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_trait_bound_mut<V>(v: &mut V, node: &mut TraitBound)
+where
+ V: VisitMut + ?Sized,
+{
+ if let Some(it) = &mut node.paren_token {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_trait_bound_modifier_mut(&mut node.modifier);
+ if let Some(it) = &mut node.lifetimes {
+ v.visit_bound_lifetimes_mut(it);
+ }
+ v.visit_path_mut(&mut node.path);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_trait_bound_modifier_mut<V>(v: &mut V, node: &mut TraitBoundModifier)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ TraitBoundModifier::None => {}
+ TraitBoundModifier::Maybe(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_trait_item_mut<V>(v: &mut V, node: &mut TraitItem)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ TraitItem::Const(_binding_0) => {
+ v.visit_trait_item_const_mut(_binding_0);
+ }
+ TraitItem::Method(_binding_0) => {
+ v.visit_trait_item_method_mut(_binding_0);
+ }
+ TraitItem::Type(_binding_0) => {
+ v.visit_trait_item_type_mut(_binding_0);
+ }
+ TraitItem::Macro(_binding_0) => {
+ v.visit_trait_item_macro_mut(_binding_0);
+ }
+ TraitItem::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_trait_item_const_mut<V>(v: &mut V, node: &mut TraitItemConst)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.const_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.colon_token.spans);
+ v.visit_type_mut(&mut node.ty);
+ if let Some(it) = &mut node.default {
+ tokens_helper(v, &mut (it).0.spans);
+ v.visit_expr_mut(&mut (it).1);
+ }
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_trait_item_macro_mut<V>(v: &mut V, node: &mut TraitItemMacro)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_macro_mut(&mut node.mac);
+ if let Some(it) = &mut node.semi_token {
+ tokens_helper(v, &mut it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_trait_item_method_mut<V>(v: &mut V, node: &mut TraitItemMethod)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_signature_mut(&mut node.sig);
+ if let Some(it) = &mut node.default {
+ v.visit_block_mut(it);
+ }
+ if let Some(it) = &mut node.semi_token {
+ tokens_helper(v, &mut it.spans);
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_trait_item_type_mut<V>(v: &mut V, node: &mut TraitItemType)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.type_token.span);
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_generics_mut(&mut node.generics);
+ if let Some(it) = &mut node.colon_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ for el in Punctuated::pairs_mut(&mut node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ if let Some(it) = &mut node.default {
+ tokens_helper(v, &mut (it).0.spans);
+ v.visit_type_mut(&mut (it).1);
+ }
+ tokens_helper(v, &mut node.semi_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_mut<V>(v: &mut V, node: &mut Type)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Type::Array(_binding_0) => {
+ v.visit_type_array_mut(_binding_0);
+ }
+ Type::BareFn(_binding_0) => {
+ v.visit_type_bare_fn_mut(_binding_0);
+ }
+ Type::Group(_binding_0) => {
+ v.visit_type_group_mut(_binding_0);
+ }
+ Type::ImplTrait(_binding_0) => {
+ v.visit_type_impl_trait_mut(_binding_0);
+ }
+ Type::Infer(_binding_0) => {
+ v.visit_type_infer_mut(_binding_0);
+ }
+ Type::Macro(_binding_0) => {
+ v.visit_type_macro_mut(_binding_0);
+ }
+ Type::Never(_binding_0) => {
+ v.visit_type_never_mut(_binding_0);
+ }
+ Type::Paren(_binding_0) => {
+ v.visit_type_paren_mut(_binding_0);
+ }
+ Type::Path(_binding_0) => {
+ v.visit_type_path_mut(_binding_0);
+ }
+ Type::Ptr(_binding_0) => {
+ v.visit_type_ptr_mut(_binding_0);
+ }
+ Type::Reference(_binding_0) => {
+ v.visit_type_reference_mut(_binding_0);
+ }
+ Type::Slice(_binding_0) => {
+ v.visit_type_slice_mut(_binding_0);
+ }
+ Type::TraitObject(_binding_0) => {
+ v.visit_type_trait_object_mut(_binding_0);
+ }
+ Type::Tuple(_binding_0) => {
+ v.visit_type_tuple_mut(_binding_0);
+ }
+ Type::Verbatim(_binding_0) => {
+ skip!(_binding_0);
+ }
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_array_mut<V>(v: &mut V, node: &mut TypeArray)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.bracket_token.span);
+ v.visit_type_mut(&mut *node.elem);
+ tokens_helper(v, &mut node.semi_token.spans);
+ v.visit_expr_mut(&mut node.len);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_bare_fn_mut<V>(v: &mut V, node: &mut TypeBareFn)
+where
+ V: VisitMut + ?Sized,
+{
+ if let Some(it) = &mut node.lifetimes {
+ v.visit_bound_lifetimes_mut(it);
+ }
+ if let Some(it) = &mut node.unsafety {
+ tokens_helper(v, &mut it.span);
+ }
+ if let Some(it) = &mut node.abi {
+ v.visit_abi_mut(it);
+ }
+ tokens_helper(v, &mut node.fn_token.span);
+ tokens_helper(v, &mut node.paren_token.span);
+ for el in Punctuated::pairs_mut(&mut node.inputs) {
+ let (it, p) = el.into_tuple();
+ v.visit_bare_fn_arg_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ if let Some(it) = &mut node.variadic {
+ v.visit_variadic_mut(it);
+ }
+ v.visit_return_type_mut(&mut node.output);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_group_mut<V>(v: &mut V, node: &mut TypeGroup)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.group_token.span);
+ v.visit_type_mut(&mut *node.elem);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_impl_trait_mut<V>(v: &mut V, node: &mut TypeImplTrait)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.impl_token.span);
+ for el in Punctuated::pairs_mut(&mut node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_infer_mut<V>(v: &mut V, node: &mut TypeInfer)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.underscore_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_macro_mut<V>(v: &mut V, node: &mut TypeMacro)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_macro_mut(&mut node.mac);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_never_mut<V>(v: &mut V, node: &mut TypeNever)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.bang_token.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_param_mut<V>(v: &mut V, node: &mut TypeParam)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_ident_mut(&mut node.ident);
+ if let Some(it) = &mut node.colon_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ for el in Punctuated::pairs_mut(&mut node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+ if let Some(it) = &mut node.eq_token {
+ tokens_helper(v, &mut it.spans);
+ }
+ if let Some(it) = &mut node.default {
+ v.visit_type_mut(it);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_param_bound_mut<V>(v: &mut V, node: &mut TypeParamBound)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ TypeParamBound::Trait(_binding_0) => {
+ v.visit_trait_bound_mut(_binding_0);
+ }
+ TypeParamBound::Lifetime(_binding_0) => {
+ v.visit_lifetime_mut(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_paren_mut<V>(v: &mut V, node: &mut TypeParen)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.paren_token.span);
+ v.visit_type_mut(&mut *node.elem);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_path_mut<V>(v: &mut V, node: &mut TypePath)
+where
+ V: VisitMut + ?Sized,
+{
+ if let Some(it) = &mut node.qself {
+ v.visit_qself_mut(it);
+ }
+ v.visit_path_mut(&mut node.path);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_ptr_mut<V>(v: &mut V, node: &mut TypePtr)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.star_token.spans);
+ if let Some(it) = &mut node.const_token {
+ tokens_helper(v, &mut it.span);
+ }
+ if let Some(it) = &mut node.mutability {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_type_mut(&mut *node.elem);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_reference_mut<V>(v: &mut V, node: &mut TypeReference)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.and_token.spans);
+ if let Some(it) = &mut node.lifetime {
+ v.visit_lifetime_mut(it);
+ }
+ if let Some(it) = &mut node.mutability {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_type_mut(&mut *node.elem);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_slice_mut<V>(v: &mut V, node: &mut TypeSlice)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.bracket_token.span);
+ v.visit_type_mut(&mut *node.elem);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_trait_object_mut<V>(v: &mut V, node: &mut TypeTraitObject)
+where
+ V: VisitMut + ?Sized,
+{
+ if let Some(it) = &mut node.dyn_token {
+ tokens_helper(v, &mut it.span);
+ }
+ for el in Punctuated::pairs_mut(&mut node.bounds) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_param_bound_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_type_tuple_mut<V>(v: &mut V, node: &mut TypeTuple)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.paren_token.span);
+ for el in Punctuated::pairs_mut(&mut node.elems) {
+ let (it, p) = el.into_tuple();
+ v.visit_type_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_un_op_mut<V>(v: &mut V, node: &mut UnOp)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ UnOp::Deref(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ UnOp::Not(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ UnOp::Neg(_binding_0) => {
+ tokens_helper(v, &mut _binding_0.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_use_glob_mut<V>(v: &mut V, node: &mut UseGlob)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.star_token.spans);
+}
+#[cfg(feature = "full")]
+pub fn visit_use_group_mut<V>(v: &mut V, node: &mut UseGroup)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.brace_token.span);
+ for el in Punctuated::pairs_mut(&mut node.items) {
+ let (it, p) = el.into_tuple();
+ v.visit_use_tree_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(feature = "full")]
+pub fn visit_use_name_mut<V>(v: &mut V, node: &mut UseName)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_ident_mut(&mut node.ident);
+}
+#[cfg(feature = "full")]
+pub fn visit_use_path_mut<V>(v: &mut V, node: &mut UsePath)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.colon2_token.spans);
+ v.visit_use_tree_mut(&mut *node.tree);
+}
+#[cfg(feature = "full")]
+pub fn visit_use_rename_mut<V>(v: &mut V, node: &mut UseRename)
+where
+ V: VisitMut + ?Sized,
+{
+ v.visit_ident_mut(&mut node.ident);
+ tokens_helper(v, &mut node.as_token.span);
+ v.visit_ident_mut(&mut node.rename);
+}
+#[cfg(feature = "full")]
+pub fn visit_use_tree_mut<V>(v: &mut V, node: &mut UseTree)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ UseTree::Path(_binding_0) => {
+ v.visit_use_path_mut(_binding_0);
+ }
+ UseTree::Name(_binding_0) => {
+ v.visit_use_name_mut(_binding_0);
+ }
+ UseTree::Rename(_binding_0) => {
+ v.visit_use_rename_mut(_binding_0);
+ }
+ UseTree::Glob(_binding_0) => {
+ v.visit_use_glob_mut(_binding_0);
+ }
+ UseTree::Group(_binding_0) => {
+ v.visit_use_group_mut(_binding_0);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_variadic_mut<V>(v: &mut V, node: &mut Variadic)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ tokens_helper(v, &mut node.dots.spans);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_variant_mut<V>(v: &mut V, node: &mut Variant)
+where
+ V: VisitMut + ?Sized,
+{
+ for it in &mut node.attrs {
+ v.visit_attribute_mut(it);
+ }
+ v.visit_ident_mut(&mut node.ident);
+ v.visit_fields_mut(&mut node.fields);
+ if let Some(it) = &mut node.discriminant {
+ tokens_helper(v, &mut (it).0.spans);
+ v.visit_expr_mut(&mut (it).1);
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_vis_crate_mut<V>(v: &mut V, node: &mut VisCrate)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.crate_token.span);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_vis_public_mut<V>(v: &mut V, node: &mut VisPublic)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.pub_token.span);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_vis_restricted_mut<V>(v: &mut V, node: &mut VisRestricted)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.pub_token.span);
+ tokens_helper(v, &mut node.paren_token.span);
+ if let Some(it) = &mut node.in_token {
+ tokens_helper(v, &mut it.span);
+ }
+ v.visit_path_mut(&mut *node.path);
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_visibility_mut<V>(v: &mut V, node: &mut Visibility)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ Visibility::Public(_binding_0) => {
+ v.visit_vis_public_mut(_binding_0);
+ }
+ Visibility::Crate(_binding_0) => {
+ v.visit_vis_crate_mut(_binding_0);
+ }
+ Visibility::Restricted(_binding_0) => {
+ v.visit_vis_restricted_mut(_binding_0);
+ }
+ Visibility::Inherited => {}
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_where_clause_mut<V>(v: &mut V, node: &mut WhereClause)
+where
+ V: VisitMut + ?Sized,
+{
+ tokens_helper(v, &mut node.where_token.span);
+ for el in Punctuated::pairs_mut(&mut node.predicates) {
+ let (it, p) = el.into_tuple();
+ v.visit_where_predicate_mut(it);
+ if let Some(p) = p {
+ tokens_helper(v, &mut p.spans);
+ }
+ }
+}
+#[cfg(any(feature = "derive", feature = "full"))]
+pub fn visit_where_predicate_mut<V>(v: &mut V, node: &mut WherePredicate)
+where
+ V: VisitMut + ?Sized,
+{
+ match node {
+ WherePredicate::Type(_binding_0) => {
+ v.visit_predicate_type_mut(_binding_0);
+ }
+ WherePredicate::Lifetime(_binding_0) => {
+ v.visit_predicate_lifetime_mut(_binding_0);
+ }
+ WherePredicate::Eq(_binding_0) => {
+ v.visit_predicate_eq_mut(_binding_0);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/gen_helper.rs b/third_party/rust/syn/src/gen_helper.rs
new file mode 100644
index 0000000000..b2796126a3
--- /dev/null
+++ b/third_party/rust/syn/src/gen_helper.rs
@@ -0,0 +1,154 @@
+#[cfg(feature = "fold")]
+pub mod fold {
+ use crate::fold::Fold;
+ use crate::punctuated::{Pair, Punctuated};
+ use proc_macro2::Span;
+
+ pub trait FoldHelper {
+ type Item;
+ fn lift<F>(self, f: F) -> Self
+ where
+ F: FnMut(Self::Item) -> Self::Item;
+ }
+
+ impl<T> FoldHelper for Vec<T> {
+ type Item = T;
+ fn lift<F>(self, f: F) -> Self
+ where
+ F: FnMut(Self::Item) -> Self::Item,
+ {
+ self.into_iter().map(f).collect()
+ }
+ }
+
+ impl<T, U> FoldHelper for Punctuated<T, U> {
+ type Item = T;
+ fn lift<F>(self, mut f: F) -> Self
+ where
+ F: FnMut(Self::Item) -> Self::Item,
+ {
+ self.into_pairs()
+ .map(Pair::into_tuple)
+ .map(|(t, u)| Pair::new(f(t), u))
+ .collect()
+ }
+ }
+
+ pub fn tokens_helper<F: Fold + ?Sized, S: Spans>(folder: &mut F, spans: &S) -> S {
+ spans.fold(folder)
+ }
+
+ pub trait Spans {
+ fn fold<F: Fold + ?Sized>(&self, folder: &mut F) -> Self;
+ }
+
+ impl Spans for Span {
+ fn fold<F: Fold + ?Sized>(&self, folder: &mut F) -> Self {
+ folder.fold_span(*self)
+ }
+ }
+
+ impl Spans for [Span; 1] {
+ fn fold<F: Fold + ?Sized>(&self, folder: &mut F) -> Self {
+ [folder.fold_span(self[0])]
+ }
+ }
+
+ impl Spans for [Span; 2] {
+ fn fold<F: Fold + ?Sized>(&self, folder: &mut F) -> Self {
+ [folder.fold_span(self[0]), folder.fold_span(self[1])]
+ }
+ }
+
+ impl Spans for [Span; 3] {
+ fn fold<F: Fold + ?Sized>(&self, folder: &mut F) -> Self {
+ [
+ folder.fold_span(self[0]),
+ folder.fold_span(self[1]),
+ folder.fold_span(self[2]),
+ ]
+ }
+ }
+}
+
+#[cfg(feature = "visit")]
+pub mod visit {
+ use crate::visit::Visit;
+ use proc_macro2::Span;
+
+ pub fn tokens_helper<'ast, V: Visit<'ast> + ?Sized, S: Spans>(visitor: &mut V, spans: &S) {
+ spans.visit(visitor);
+ }
+
+ pub trait Spans {
+ fn visit<'ast, V: Visit<'ast> + ?Sized>(&self, visitor: &mut V);
+ }
+
+ impl Spans for Span {
+ fn visit<'ast, V: Visit<'ast> + ?Sized>(&self, visitor: &mut V) {
+ visitor.visit_span(self);
+ }
+ }
+
+ impl Spans for [Span; 1] {
+ fn visit<'ast, V: Visit<'ast> + ?Sized>(&self, visitor: &mut V) {
+ visitor.visit_span(&self[0]);
+ }
+ }
+
+ impl Spans for [Span; 2] {
+ fn visit<'ast, V: Visit<'ast> + ?Sized>(&self, visitor: &mut V) {
+ visitor.visit_span(&self[0]);
+ visitor.visit_span(&self[1]);
+ }
+ }
+
+ impl Spans for [Span; 3] {
+ fn visit<'ast, V: Visit<'ast> + ?Sized>(&self, visitor: &mut V) {
+ visitor.visit_span(&self[0]);
+ visitor.visit_span(&self[1]);
+ visitor.visit_span(&self[2]);
+ }
+ }
+}
+
+#[cfg(feature = "visit-mut")]
+pub mod visit_mut {
+ use crate::visit_mut::VisitMut;
+ use proc_macro2::Span;
+
+ pub fn tokens_helper<V: VisitMut + ?Sized, S: Spans>(visitor: &mut V, spans: &mut S) {
+ spans.visit_mut(visitor);
+ }
+
+ pub trait Spans {
+ fn visit_mut<V: VisitMut + ?Sized>(&mut self, visitor: &mut V);
+ }
+
+ impl Spans for Span {
+ fn visit_mut<V: VisitMut + ?Sized>(&mut self, visitor: &mut V) {
+ visitor.visit_span_mut(self);
+ }
+ }
+
+ impl Spans for [Span; 1] {
+ fn visit_mut<V: VisitMut + ?Sized>(&mut self, visitor: &mut V) {
+ visitor.visit_span_mut(&mut self[0]);
+ }
+ }
+
+ impl Spans for [Span; 2] {
+ fn visit_mut<V: VisitMut + ?Sized>(&mut self, visitor: &mut V) {
+ visitor.visit_span_mut(&mut self[0]);
+ visitor.visit_span_mut(&mut self[1]);
+ }
+ }
+
+ impl Spans for [Span; 3] {
+ fn visit_mut<V: VisitMut + ?Sized>(&mut self, visitor: &mut V) {
+ visitor.visit_span_mut(&mut self[0]);
+ visitor.visit_span_mut(&mut self[1]);
+ visitor.visit_span_mut(&mut self[2]);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/generics.rs b/third_party/rust/syn/src/generics.rs
new file mode 100644
index 0000000000..6d4fe847ed
--- /dev/null
+++ b/third_party/rust/syn/src/generics.rs
@@ -0,0 +1,1362 @@
+use super::*;
+use crate::punctuated::{Iter, IterMut, Punctuated};
+#[cfg(all(feature = "printing", feature = "extra-traits"))]
+use std::fmt::{self, Debug};
+#[cfg(all(feature = "printing", feature = "extra-traits"))]
+use std::hash::{Hash, Hasher};
+
+ast_struct! {
+ /// Lifetimes and type parameters attached to a declaration of a function,
+ /// enum, trait, etc.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Generics {
+ pub lt_token: Option<Token![<]>,
+ pub params: Punctuated<GenericParam, Token![,]>,
+ pub gt_token: Option<Token![>]>,
+ pub where_clause: Option<WhereClause>,
+ }
+}
+
+ast_enum_of_structs! {
+ /// A generic type parameter, lifetime, or const generic: `T: Into<String>`,
+ /// `'a: 'b`, `const LEN: usize`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum GenericParam {
+ /// A generic type parameter: `T: Into<String>`.
+ Type(TypeParam),
+
+ /// A lifetime definition: `'a: 'b + 'c + 'd`.
+ Lifetime(LifetimeDef),
+
+ /// A const generic parameter: `const LENGTH: usize`.
+ Const(ConstParam),
+ }
+}
+
+ast_struct! {
+ /// A generic type parameter: `T: Into<String>`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeParam {
+ pub attrs: Vec<Attribute>,
+ pub ident: Ident,
+ pub colon_token: Option<Token![:]>,
+ pub bounds: Punctuated<TypeParamBound, Token![+]>,
+ pub eq_token: Option<Token![=]>,
+ pub default: Option<Type>,
+ }
+}
+
+ast_struct! {
+ /// A lifetime definition: `'a: 'b + 'c + 'd`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct LifetimeDef {
+ pub attrs: Vec<Attribute>,
+ pub lifetime: Lifetime,
+ pub colon_token: Option<Token![:]>,
+ pub bounds: Punctuated<Lifetime, Token![+]>,
+ }
+}
+
+ast_struct! {
+ /// A const generic parameter: `const LENGTH: usize`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ConstParam {
+ pub attrs: Vec<Attribute>,
+ pub const_token: Token![const],
+ pub ident: Ident,
+ pub colon_token: Token![:],
+ pub ty: Type,
+ pub eq_token: Option<Token![=]>,
+ pub default: Option<Expr>,
+ }
+}
+
+impl Default for Generics {
+ fn default() -> Self {
+ Generics {
+ lt_token: None,
+ params: Punctuated::new(),
+ gt_token: None,
+ where_clause: None,
+ }
+ }
+}
+
+impl Generics {
+ /// Returns an
+ /// <code
+ /// style="padding-right:0;">Iterator&lt;Item = &amp;</code><a
+ /// href="struct.TypeParam.html"><code
+ /// style="padding-left:0;padding-right:0;">TypeParam</code></a><code
+ /// style="padding-left:0;">&gt;</code>
+ /// over the type parameters in `self.params`.
+ pub fn type_params(&self) -> TypeParams {
+ TypeParams(self.params.iter())
+ }
+
+ /// Returns an
+ /// <code
+ /// style="padding-right:0;">Iterator&lt;Item = &amp;mut </code><a
+ /// href="struct.TypeParam.html"><code
+ /// style="padding-left:0;padding-right:0;">TypeParam</code></a><code
+ /// style="padding-left:0;">&gt;</code>
+ /// over the type parameters in `self.params`.
+ pub fn type_params_mut(&mut self) -> TypeParamsMut {
+ TypeParamsMut(self.params.iter_mut())
+ }
+
+ /// Returns an
+ /// <code
+ /// style="padding-right:0;">Iterator&lt;Item = &amp;</code><a
+ /// href="struct.LifetimeDef.html"><code
+ /// style="padding-left:0;padding-right:0;">LifetimeDef</code></a><code
+ /// style="padding-left:0;">&gt;</code>
+ /// over the lifetime parameters in `self.params`.
+ pub fn lifetimes(&self) -> Lifetimes {
+ Lifetimes(self.params.iter())
+ }
+
+ /// Returns an
+ /// <code
+ /// style="padding-right:0;">Iterator&lt;Item = &amp;mut </code><a
+ /// href="struct.LifetimeDef.html"><code
+ /// style="padding-left:0;padding-right:0;">LifetimeDef</code></a><code
+ /// style="padding-left:0;">&gt;</code>
+ /// over the lifetime parameters in `self.params`.
+ pub fn lifetimes_mut(&mut self) -> LifetimesMut {
+ LifetimesMut(self.params.iter_mut())
+ }
+
+ /// Returns an
+ /// <code
+ /// style="padding-right:0;">Iterator&lt;Item = &amp;</code><a
+ /// href="struct.ConstParam.html"><code
+ /// style="padding-left:0;padding-right:0;">ConstParam</code></a><code
+ /// style="padding-left:0;">&gt;</code>
+ /// over the constant parameters in `self.params`.
+ pub fn const_params(&self) -> ConstParams {
+ ConstParams(self.params.iter())
+ }
+
+ /// Returns an
+ /// <code
+ /// style="padding-right:0;">Iterator&lt;Item = &amp;mut </code><a
+ /// href="struct.ConstParam.html"><code
+ /// style="padding-left:0;padding-right:0;">ConstParam</code></a><code
+ /// style="padding-left:0;">&gt;</code>
+ /// over the constant parameters in `self.params`.
+ pub fn const_params_mut(&mut self) -> ConstParamsMut {
+ ConstParamsMut(self.params.iter_mut())
+ }
+
+ /// Initializes an empty `where`-clause if there is not one present already.
+ pub fn make_where_clause(&mut self) -> &mut WhereClause {
+ self.where_clause.get_or_insert_with(|| WhereClause {
+ where_token: <Token![where]>::default(),
+ predicates: Punctuated::new(),
+ })
+ }
+}
+
+pub struct TypeParams<'a>(Iter<'a, GenericParam>);
+
+impl<'a> Iterator for TypeParams<'a> {
+ type Item = &'a TypeParam;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ let next = match self.0.next() {
+ Some(item) => item,
+ None => return None,
+ };
+ if let GenericParam::Type(type_param) = next {
+ Some(type_param)
+ } else {
+ self.next()
+ }
+ }
+}
+
+pub struct TypeParamsMut<'a>(IterMut<'a, GenericParam>);
+
+impl<'a> Iterator for TypeParamsMut<'a> {
+ type Item = &'a mut TypeParam;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ let next = match self.0.next() {
+ Some(item) => item,
+ None => return None,
+ };
+ if let GenericParam::Type(type_param) = next {
+ Some(type_param)
+ } else {
+ self.next()
+ }
+ }
+}
+
+pub struct Lifetimes<'a>(Iter<'a, GenericParam>);
+
+impl<'a> Iterator for Lifetimes<'a> {
+ type Item = &'a LifetimeDef;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ let next = match self.0.next() {
+ Some(item) => item,
+ None => return None,
+ };
+ if let GenericParam::Lifetime(lifetime) = next {
+ Some(lifetime)
+ } else {
+ self.next()
+ }
+ }
+}
+
+pub struct LifetimesMut<'a>(IterMut<'a, GenericParam>);
+
+impl<'a> Iterator for LifetimesMut<'a> {
+ type Item = &'a mut LifetimeDef;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ let next = match self.0.next() {
+ Some(item) => item,
+ None => return None,
+ };
+ if let GenericParam::Lifetime(lifetime) = next {
+ Some(lifetime)
+ } else {
+ self.next()
+ }
+ }
+}
+
+pub struct ConstParams<'a>(Iter<'a, GenericParam>);
+
+impl<'a> Iterator for ConstParams<'a> {
+ type Item = &'a ConstParam;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ let next = match self.0.next() {
+ Some(item) => item,
+ None => return None,
+ };
+ if let GenericParam::Const(const_param) = next {
+ Some(const_param)
+ } else {
+ self.next()
+ }
+ }
+}
+
+pub struct ConstParamsMut<'a>(IterMut<'a, GenericParam>);
+
+impl<'a> Iterator for ConstParamsMut<'a> {
+ type Item = &'a mut ConstParam;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ let next = match self.0.next() {
+ Some(item) => item,
+ None => return None,
+ };
+ if let GenericParam::Const(const_param) = next {
+ Some(const_param)
+ } else {
+ self.next()
+ }
+ }
+}
+
+/// Returned by `Generics::split_for_impl`.
+///
+/// *This type is available only if Syn is built with the `"derive"` or `"full"`
+/// feature and the `"printing"` feature.*
+#[cfg(feature = "printing")]
+#[cfg_attr(
+ doc_cfg,
+ doc(cfg(all(any(feature = "full", feature = "derive"), feature = "printing")))
+)]
+pub struct ImplGenerics<'a>(&'a Generics);
+
+/// Returned by `Generics::split_for_impl`.
+///
+/// *This type is available only if Syn is built with the `"derive"` or `"full"`
+/// feature and the `"printing"` feature.*
+#[cfg(feature = "printing")]
+#[cfg_attr(
+ doc_cfg,
+ doc(cfg(all(any(feature = "full", feature = "derive"), feature = "printing")))
+)]
+pub struct TypeGenerics<'a>(&'a Generics);
+
+/// Returned by `TypeGenerics::as_turbofish`.
+///
+/// *This type is available only if Syn is built with the `"derive"` or `"full"`
+/// feature and the `"printing"` feature.*
+#[cfg(feature = "printing")]
+#[cfg_attr(
+ doc_cfg,
+ doc(cfg(all(any(feature = "full", feature = "derive"), feature = "printing")))
+)]
+pub struct Turbofish<'a>(&'a Generics);
+
+#[cfg(feature = "printing")]
+impl Generics {
+ /// Split a type's generics into the pieces required for impl'ing a trait
+ /// for that type.
+ ///
+ /// ```
+ /// # use proc_macro2::{Span, Ident};
+ /// # use quote::quote;
+ /// #
+ /// # let generics: syn::Generics = Default::default();
+ /// # let name = Ident::new("MyType", Span::call_site());
+ /// #
+ /// let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
+ /// quote! {
+ /// impl #impl_generics MyTrait for #name #ty_generics #where_clause {
+ /// // ...
+ /// }
+ /// }
+ /// # ;
+ /// ```
+ ///
+ /// *This method is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature and the `"printing"` feature.*
+ #[cfg_attr(
+ doc_cfg,
+ doc(cfg(all(any(feature = "full", feature = "derive"), feature = "printing")))
+ )]
+ pub fn split_for_impl(&self) -> (ImplGenerics, TypeGenerics, Option<&WhereClause>) {
+ (
+ ImplGenerics(self),
+ TypeGenerics(self),
+ self.where_clause.as_ref(),
+ )
+ }
+}
+
+#[cfg(feature = "printing")]
+macro_rules! generics_wrapper_impls {
+ ($ty:ident) => {
+ #[cfg(feature = "clone-impls")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+ impl<'a> Clone for $ty<'a> {
+ fn clone(&self) -> Self {
+ $ty(self.0)
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl<'a> Debug for $ty<'a> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter
+ .debug_tuple(stringify!($ty))
+ .field(self.0)
+ .finish()
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl<'a> Eq for $ty<'a> {}
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl<'a> PartialEq for $ty<'a> {
+ fn eq(&self, other: &Self) -> bool {
+ self.0 == other.0
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl<'a> Hash for $ty<'a> {
+ fn hash<H: Hasher>(&self, state: &mut H) {
+ self.0.hash(state);
+ }
+ }
+ };
+}
+
+#[cfg(feature = "printing")]
+generics_wrapper_impls!(ImplGenerics);
+#[cfg(feature = "printing")]
+generics_wrapper_impls!(TypeGenerics);
+#[cfg(feature = "printing")]
+generics_wrapper_impls!(Turbofish);
+
+#[cfg(feature = "printing")]
+impl<'a> TypeGenerics<'a> {
+ /// Turn a type's generics like `<X, Y>` into a turbofish like `::<X, Y>`.
+ ///
+ /// *This method is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature and the `"printing"` feature.*
+ pub fn as_turbofish(&self) -> Turbofish {
+ Turbofish(self.0)
+ }
+}
+
+ast_struct! {
+ /// A set of bound lifetimes: `for<'a, 'b, 'c>`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct BoundLifetimes {
+ pub for_token: Token![for],
+ pub lt_token: Token![<],
+ pub lifetimes: Punctuated<LifetimeDef, Token![,]>,
+ pub gt_token: Token![>],
+ }
+}
+
+impl Default for BoundLifetimes {
+ fn default() -> Self {
+ BoundLifetimes {
+ for_token: Default::default(),
+ lt_token: Default::default(),
+ lifetimes: Punctuated::new(),
+ gt_token: Default::default(),
+ }
+ }
+}
+
+impl LifetimeDef {
+ pub fn new(lifetime: Lifetime) -> Self {
+ LifetimeDef {
+ attrs: Vec::new(),
+ lifetime,
+ colon_token: None,
+ bounds: Punctuated::new(),
+ }
+ }
+}
+
+impl From<Ident> for TypeParam {
+ fn from(ident: Ident) -> Self {
+ TypeParam {
+ attrs: vec![],
+ ident,
+ colon_token: None,
+ bounds: Punctuated::new(),
+ eq_token: None,
+ default: None,
+ }
+ }
+}
+
+ast_enum_of_structs! {
+ /// A trait or lifetime used as a bound on a type parameter.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum TypeParamBound {
+ Trait(TraitBound),
+ Lifetime(Lifetime),
+ }
+}
+
+ast_struct! {
+ /// A trait used as a bound on a type parameter.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TraitBound {
+ pub paren_token: Option<token::Paren>,
+ pub modifier: TraitBoundModifier,
+ /// The `for<'a>` in `for<'a> Foo<&'a T>`
+ pub lifetimes: Option<BoundLifetimes>,
+ /// The `Foo<&'a T>` in `for<'a> Foo<&'a T>`
+ pub path: Path,
+ }
+}
+
+ast_enum! {
+ /// A modifier on a trait bound, currently only used for the `?` in
+ /// `?Sized`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum TraitBoundModifier {
+ None,
+ Maybe(Token![?]),
+ }
+}
+
+ast_struct! {
+ /// A `where` clause in a definition: `where T: Deserialize<'de>, D:
+ /// 'static`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct WhereClause {
+ pub where_token: Token![where],
+ pub predicates: Punctuated<WherePredicate, Token![,]>,
+ }
+}
+
+ast_enum_of_structs! {
+ /// A single predicate in a `where` clause: `T: Deserialize<'de>`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum WherePredicate {
+ /// A type predicate in a `where` clause: `for<'c> Foo<'c>: Trait<'c>`.
+ Type(PredicateType),
+
+ /// A lifetime predicate in a `where` clause: `'a: 'b + 'c`.
+ Lifetime(PredicateLifetime),
+
+ /// An equality predicate in a `where` clause (unsupported).
+ Eq(PredicateEq),
+ }
+}
+
+ast_struct! {
+ /// A type predicate in a `where` clause: `for<'c> Foo<'c>: Trait<'c>`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct PredicateType {
+ /// Any lifetimes from a `for` binding
+ pub lifetimes: Option<BoundLifetimes>,
+ /// The type being bounded
+ pub bounded_ty: Type,
+ pub colon_token: Token![:],
+ /// Trait and lifetime bounds (`Clone+Send+'static`)
+ pub bounds: Punctuated<TypeParamBound, Token![+]>,
+ }
+}
+
+ast_struct! {
+ /// A lifetime predicate in a `where` clause: `'a: 'b + 'c`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct PredicateLifetime {
+ pub lifetime: Lifetime,
+ pub colon_token: Token![:],
+ pub bounds: Punctuated<Lifetime, Token![+]>,
+ }
+}
+
+ast_struct! {
+ /// An equality predicate in a `where` clause (unsupported).
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct PredicateEq {
+ pub lhs_ty: Type,
+ pub eq_token: Token![=],
+ pub rhs_ty: Type,
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::ext::IdentExt;
+ use crate::parse::{Parse, ParseStream, Result};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Generics {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if !input.peek(Token![<]) {
+ return Ok(Generics::default());
+ }
+
+ let lt_token: Token![<] = input.parse()?;
+
+ let mut params = Punctuated::new();
+ loop {
+ if input.peek(Token![>]) {
+ break;
+ }
+
+ let attrs = input.call(Attribute::parse_outer)?;
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Lifetime) {
+ params.push_value(GenericParam::Lifetime(LifetimeDef {
+ attrs,
+ ..input.parse()?
+ }));
+ } else if lookahead.peek(Ident) {
+ params.push_value(GenericParam::Type(TypeParam {
+ attrs,
+ ..input.parse()?
+ }));
+ } else if lookahead.peek(Token![const]) {
+ params.push_value(GenericParam::Const(ConstParam {
+ attrs,
+ ..input.parse()?
+ }));
+ } else if input.peek(Token![_]) {
+ params.push_value(GenericParam::Type(TypeParam {
+ attrs,
+ ident: input.call(Ident::parse_any)?,
+ colon_token: None,
+ bounds: Punctuated::new(),
+ eq_token: None,
+ default: None,
+ }));
+ } else {
+ return Err(lookahead.error());
+ }
+
+ if input.peek(Token![>]) {
+ break;
+ }
+ let punct = input.parse()?;
+ params.push_punct(punct);
+ }
+
+ let gt_token: Token![>] = input.parse()?;
+
+ Ok(Generics {
+ lt_token: Some(lt_token),
+ params,
+ gt_token: Some(gt_token),
+ where_clause: None,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for GenericParam {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Ident) {
+ Ok(GenericParam::Type(TypeParam {
+ attrs,
+ ..input.parse()?
+ }))
+ } else if lookahead.peek(Lifetime) {
+ Ok(GenericParam::Lifetime(LifetimeDef {
+ attrs,
+ ..input.parse()?
+ }))
+ } else if lookahead.peek(Token![const]) {
+ Ok(GenericParam::Const(ConstParam {
+ attrs,
+ ..input.parse()?
+ }))
+ } else {
+ Err(lookahead.error())
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for LifetimeDef {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let has_colon;
+ Ok(LifetimeDef {
+ attrs: input.call(Attribute::parse_outer)?,
+ lifetime: input.parse()?,
+ colon_token: {
+ if input.peek(Token![:]) {
+ has_colon = true;
+ Some(input.parse()?)
+ } else {
+ has_colon = false;
+ None
+ }
+ },
+ bounds: {
+ let mut bounds = Punctuated::new();
+ if has_colon {
+ loop {
+ if input.peek(Token![,]) || input.peek(Token![>]) {
+ break;
+ }
+ let value = input.parse()?;
+ bounds.push_value(value);
+ if !input.peek(Token![+]) {
+ break;
+ }
+ let punct = input.parse()?;
+ bounds.push_punct(punct);
+ }
+ }
+ bounds
+ },
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for BoundLifetimes {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(BoundLifetimes {
+ for_token: input.parse()?,
+ lt_token: input.parse()?,
+ lifetimes: {
+ let mut lifetimes = Punctuated::new();
+ while !input.peek(Token![>]) {
+ lifetimes.push_value(input.parse()?);
+ if input.peek(Token![>]) {
+ break;
+ }
+ lifetimes.push_punct(input.parse()?);
+ }
+ lifetimes
+ },
+ gt_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Option<BoundLifetimes> {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Token![for]) {
+ input.parse().map(Some)
+ } else {
+ Ok(None)
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeParam {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let ident: Ident = input.parse()?;
+ let colon_token: Option<Token![:]> = input.parse()?;
+
+ let begin_bound = input.fork();
+ let mut is_maybe_const = false;
+ let mut bounds = Punctuated::new();
+ if colon_token.is_some() {
+ loop {
+ if input.peek(Token![,]) || input.peek(Token![>]) || input.peek(Token![=]) {
+ break;
+ }
+ if input.peek(Token![~]) && input.peek2(Token![const]) {
+ input.parse::<Token![~]>()?;
+ input.parse::<Token![const]>()?;
+ is_maybe_const = true;
+ }
+ let value: TypeParamBound = input.parse()?;
+ bounds.push_value(value);
+ if !input.peek(Token![+]) {
+ break;
+ }
+ let punct: Token![+] = input.parse()?;
+ bounds.push_punct(punct);
+ }
+ }
+
+ let mut eq_token: Option<Token![=]> = input.parse()?;
+ let mut default = if eq_token.is_some() {
+ Some(input.parse::<Type>()?)
+ } else {
+ None
+ };
+
+ if is_maybe_const {
+ bounds.clear();
+ eq_token = None;
+ default = Some(Type::Verbatim(verbatim::between(begin_bound, input)));
+ }
+
+ Ok(TypeParam {
+ attrs,
+ ident,
+ colon_token,
+ bounds,
+ eq_token,
+ default,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeParamBound {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Lifetime) {
+ return input.parse().map(TypeParamBound::Lifetime);
+ }
+
+ if input.peek(token::Paren) {
+ let content;
+ let paren_token = parenthesized!(content in input);
+ let mut bound: TraitBound = content.parse()?;
+ bound.paren_token = Some(paren_token);
+ return Ok(TypeParamBound::Trait(bound));
+ }
+
+ input.parse().map(TypeParamBound::Trait)
+ }
+ }
+
+ impl TypeParamBound {
+ pub(crate) fn parse_multiple(
+ input: ParseStream,
+ allow_plus: bool,
+ ) -> Result<Punctuated<Self, Token![+]>> {
+ let mut bounds = Punctuated::new();
+ loop {
+ bounds.push_value(input.parse()?);
+ if !(allow_plus && input.peek(Token![+])) {
+ break;
+ }
+ bounds.push_punct(input.parse()?);
+ if !(input.peek(Ident::peek_any)
+ || input.peek(Token![::])
+ || input.peek(Token![?])
+ || input.peek(Lifetime)
+ || input.peek(token::Paren))
+ {
+ break;
+ }
+ }
+ Ok(bounds)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TraitBound {
+ fn parse(input: ParseStream) -> Result<Self> {
+ #[cfg(feature = "full")]
+ let tilde_const = if input.peek(Token![~]) && input.peek2(Token![const]) {
+ let tilde_token = input.parse::<Token![~]>()?;
+ let const_token = input.parse::<Token![const]>()?;
+ Some((tilde_token, const_token))
+ } else {
+ None
+ };
+
+ let modifier: TraitBoundModifier = input.parse()?;
+ let lifetimes: Option<BoundLifetimes> = input.parse()?;
+
+ let mut path: Path = input.parse()?;
+ if path.segments.last().unwrap().arguments.is_empty()
+ && (input.peek(token::Paren) || input.peek(Token![::]) && input.peek3(token::Paren))
+ {
+ input.parse::<Option<Token![::]>>()?;
+ let args: ParenthesizedGenericArguments = input.parse()?;
+ let parenthesized = PathArguments::Parenthesized(args);
+ path.segments.last_mut().unwrap().arguments = parenthesized;
+ }
+
+ #[cfg(feature = "full")]
+ {
+ if let Some((tilde_token, const_token)) = tilde_const {
+ path.segments.insert(
+ 0,
+ PathSegment {
+ ident: Ident::new("const", const_token.span),
+ arguments: PathArguments::None,
+ },
+ );
+ let (_const, punct) = path.segments.pairs_mut().next().unwrap().into_tuple();
+ *punct.unwrap() = Token![::](tilde_token.span);
+ }
+ }
+
+ Ok(TraitBound {
+ paren_token: None,
+ modifier,
+ lifetimes,
+ path,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TraitBoundModifier {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Token![?]) {
+ input.parse().map(TraitBoundModifier::Maybe)
+ } else {
+ Ok(TraitBoundModifier::None)
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ConstParam {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut default = None;
+ Ok(ConstParam {
+ attrs: input.call(Attribute::parse_outer)?,
+ const_token: input.parse()?,
+ ident: input.parse()?,
+ colon_token: input.parse()?,
+ ty: input.parse()?,
+ eq_token: {
+ if input.peek(Token![=]) {
+ let eq_token = input.parse()?;
+ default = Some(path::parsing::const_argument(input)?);
+ Some(eq_token)
+ } else {
+ None
+ }
+ },
+ default,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for WhereClause {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(WhereClause {
+ where_token: input.parse()?,
+ predicates: {
+ let mut predicates = Punctuated::new();
+ loop {
+ if input.is_empty()
+ || input.peek(token::Brace)
+ || input.peek(Token![,])
+ || input.peek(Token![;])
+ || input.peek(Token![:]) && !input.peek(Token![::])
+ || input.peek(Token![=])
+ {
+ break;
+ }
+ let value = input.parse()?;
+ predicates.push_value(value);
+ if !input.peek(Token![,]) {
+ break;
+ }
+ let punct = input.parse()?;
+ predicates.push_punct(punct);
+ }
+ predicates
+ },
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Option<WhereClause> {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Token![where]) {
+ input.parse().map(Some)
+ } else {
+ Ok(None)
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for WherePredicate {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Lifetime) && input.peek2(Token![:]) {
+ Ok(WherePredicate::Lifetime(PredicateLifetime {
+ lifetime: input.parse()?,
+ colon_token: input.parse()?,
+ bounds: {
+ let mut bounds = Punctuated::new();
+ loop {
+ if input.is_empty()
+ || input.peek(token::Brace)
+ || input.peek(Token![,])
+ || input.peek(Token![;])
+ || input.peek(Token![:])
+ || input.peek(Token![=])
+ {
+ break;
+ }
+ let value = input.parse()?;
+ bounds.push_value(value);
+ if !input.peek(Token![+]) {
+ break;
+ }
+ let punct = input.parse()?;
+ bounds.push_punct(punct);
+ }
+ bounds
+ },
+ }))
+ } else {
+ Ok(WherePredicate::Type(PredicateType {
+ lifetimes: input.parse()?,
+ bounded_ty: input.parse()?,
+ colon_token: input.parse()?,
+ bounds: {
+ let mut bounds = Punctuated::new();
+ loop {
+ if input.is_empty()
+ || input.peek(token::Brace)
+ || input.peek(Token![,])
+ || input.peek(Token![;])
+ || input.peek(Token![:]) && !input.peek(Token![::])
+ || input.peek(Token![=])
+ {
+ break;
+ }
+ let value = input.parse()?;
+ bounds.push_value(value);
+ if !input.peek(Token![+]) {
+ break;
+ }
+ let punct = input.parse()?;
+ bounds.push_punct(punct);
+ }
+ bounds
+ },
+ }))
+ }
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use crate::attr::FilterAttrs;
+ use crate::print::TokensOrDefault;
+ #[cfg(feature = "full")]
+ use crate::punctuated::Pair;
+ use proc_macro2::TokenStream;
+ #[cfg(feature = "full")]
+ use proc_macro2::TokenTree;
+ use quote::{ToTokens, TokenStreamExt};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Generics {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ if self.params.is_empty() {
+ return;
+ }
+
+ TokensOrDefault(&self.lt_token).to_tokens(tokens);
+
+ // Print lifetimes before types and consts, regardless of their
+ // order in self.params.
+ //
+ // TODO: ordering rules for const parameters vs type parameters have
+ // not been settled yet. https://github.com/rust-lang/rust/issues/44580
+ let mut trailing_or_empty = true;
+ for param in self.params.pairs() {
+ if let GenericParam::Lifetime(_) = **param.value() {
+ param.to_tokens(tokens);
+ trailing_or_empty = param.punct().is_some();
+ }
+ }
+ for param in self.params.pairs() {
+ match **param.value() {
+ GenericParam::Type(_) | GenericParam::Const(_) => {
+ if !trailing_or_empty {
+ <Token![,]>::default().to_tokens(tokens);
+ trailing_or_empty = true;
+ }
+ param.to_tokens(tokens);
+ }
+ GenericParam::Lifetime(_) => {}
+ }
+ }
+
+ TokensOrDefault(&self.gt_token).to_tokens(tokens);
+ }
+ }
+
+ impl<'a> ToTokens for ImplGenerics<'a> {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ if self.0.params.is_empty() {
+ return;
+ }
+
+ TokensOrDefault(&self.0.lt_token).to_tokens(tokens);
+
+ // Print lifetimes before types and consts, regardless of their
+ // order in self.params.
+ //
+ // TODO: ordering rules for const parameters vs type parameters have
+ // not been settled yet. https://github.com/rust-lang/rust/issues/44580
+ let mut trailing_or_empty = true;
+ for param in self.0.params.pairs() {
+ if let GenericParam::Lifetime(_) = **param.value() {
+ param.to_tokens(tokens);
+ trailing_or_empty = param.punct().is_some();
+ }
+ }
+ for param in self.0.params.pairs() {
+ if let GenericParam::Lifetime(_) = **param.value() {
+ continue;
+ }
+ if !trailing_or_empty {
+ <Token![,]>::default().to_tokens(tokens);
+ trailing_or_empty = true;
+ }
+ match *param.value() {
+ GenericParam::Lifetime(_) => unreachable!(),
+ GenericParam::Type(param) => {
+ // Leave off the type parameter defaults
+ tokens.append_all(param.attrs.outer());
+ param.ident.to_tokens(tokens);
+ if !param.bounds.is_empty() {
+ TokensOrDefault(&param.colon_token).to_tokens(tokens);
+ param.bounds.to_tokens(tokens);
+ }
+ }
+ GenericParam::Const(param) => {
+ // Leave off the const parameter defaults
+ tokens.append_all(param.attrs.outer());
+ param.const_token.to_tokens(tokens);
+ param.ident.to_tokens(tokens);
+ param.colon_token.to_tokens(tokens);
+ param.ty.to_tokens(tokens);
+ }
+ }
+ param.punct().to_tokens(tokens);
+ }
+
+ TokensOrDefault(&self.0.gt_token).to_tokens(tokens);
+ }
+ }
+
+ impl<'a> ToTokens for TypeGenerics<'a> {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ if self.0.params.is_empty() {
+ return;
+ }
+
+ TokensOrDefault(&self.0.lt_token).to_tokens(tokens);
+
+ // Print lifetimes before types and consts, regardless of their
+ // order in self.params.
+ //
+ // TODO: ordering rules for const parameters vs type parameters have
+ // not been settled yet. https://github.com/rust-lang/rust/issues/44580
+ let mut trailing_or_empty = true;
+ for param in self.0.params.pairs() {
+ if let GenericParam::Lifetime(def) = *param.value() {
+ // Leave off the lifetime bounds and attributes
+ def.lifetime.to_tokens(tokens);
+ param.punct().to_tokens(tokens);
+ trailing_or_empty = param.punct().is_some();
+ }
+ }
+ for param in self.0.params.pairs() {
+ if let GenericParam::Lifetime(_) = **param.value() {
+ continue;
+ }
+ if !trailing_or_empty {
+ <Token![,]>::default().to_tokens(tokens);
+ trailing_or_empty = true;
+ }
+ match *param.value() {
+ GenericParam::Lifetime(_) => unreachable!(),
+ GenericParam::Type(param) => {
+ // Leave off the type parameter defaults
+ param.ident.to_tokens(tokens);
+ }
+ GenericParam::Const(param) => {
+ // Leave off the const parameter defaults
+ param.ident.to_tokens(tokens);
+ }
+ }
+ param.punct().to_tokens(tokens);
+ }
+
+ TokensOrDefault(&self.0.gt_token).to_tokens(tokens);
+ }
+ }
+
+ impl<'a> ToTokens for Turbofish<'a> {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ if !self.0.params.is_empty() {
+ <Token![::]>::default().to_tokens(tokens);
+ TypeGenerics(self.0).to_tokens(tokens);
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for BoundLifetimes {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.for_token.to_tokens(tokens);
+ self.lt_token.to_tokens(tokens);
+ self.lifetimes.to_tokens(tokens);
+ self.gt_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for LifetimeDef {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.lifetime.to_tokens(tokens);
+ if !self.bounds.is_empty() {
+ TokensOrDefault(&self.colon_token).to_tokens(tokens);
+ self.bounds.to_tokens(tokens);
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeParam {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.ident.to_tokens(tokens);
+ if !self.bounds.is_empty() {
+ TokensOrDefault(&self.colon_token).to_tokens(tokens);
+ self.bounds.to_tokens(tokens);
+ }
+ if let Some(default) = &self.default {
+ #[cfg(feature = "full")]
+ {
+ if self.eq_token.is_none() {
+ if let Type::Verbatim(default) = default {
+ let mut iter = default.clone().into_iter().peekable();
+ while let Some(token) = iter.next() {
+ if let TokenTree::Punct(q) = token {
+ if q.as_char() == '~' {
+ if let Some(TokenTree::Ident(c)) = iter.peek() {
+ if c == "const" {
+ if self.bounds.is_empty() {
+ TokensOrDefault(&self.colon_token)
+ .to_tokens(tokens);
+ }
+ return default.to_tokens(tokens);
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ TokensOrDefault(&self.eq_token).to_tokens(tokens);
+ default.to_tokens(tokens);
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TraitBound {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ let to_tokens = |tokens: &mut TokenStream| {
+ #[cfg(feature = "full")]
+ let skip = match self.path.segments.pairs().next() {
+ Some(Pair::Punctuated(t, p)) if t.ident == "const" => {
+ Token![~](p.spans[0]).to_tokens(tokens);
+ t.to_tokens(tokens);
+ 1
+ }
+ _ => 0,
+ };
+ self.modifier.to_tokens(tokens);
+ self.lifetimes.to_tokens(tokens);
+ #[cfg(feature = "full")]
+ {
+ self.path.leading_colon.to_tokens(tokens);
+ tokens.append_all(self.path.segments.pairs().skip(skip));
+ }
+ #[cfg(not(feature = "full"))]
+ {
+ self.path.to_tokens(tokens);
+ }
+ };
+ match &self.paren_token {
+ Some(paren) => paren.surround(tokens, to_tokens),
+ None => to_tokens(tokens),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TraitBoundModifier {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ TraitBoundModifier::None => {}
+ TraitBoundModifier::Maybe(t) => t.to_tokens(tokens),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ConstParam {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.const_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ if let Some(default) = &self.default {
+ TokensOrDefault(&self.eq_token).to_tokens(tokens);
+ default.to_tokens(tokens);
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for WhereClause {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ if !self.predicates.is_empty() {
+ self.where_token.to_tokens(tokens);
+ self.predicates.to_tokens(tokens);
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PredicateType {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.lifetimes.to_tokens(tokens);
+ self.bounded_ty.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.bounds.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PredicateLifetime {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.lifetime.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.bounds.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PredicateEq {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.lhs_ty.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ self.rhs_ty.to_tokens(tokens);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/group.rs b/third_party/rust/syn/src/group.rs
new file mode 100644
index 0000000000..7fd273c1de
--- /dev/null
+++ b/third_party/rust/syn/src/group.rs
@@ -0,0 +1,282 @@
+use crate::error::Result;
+use crate::parse::ParseBuffer;
+use crate::token;
+use proc_macro2::{Delimiter, Span};
+
+// Not public API.
+#[doc(hidden)]
+pub struct Parens<'a> {
+ pub token: token::Paren,
+ pub content: ParseBuffer<'a>,
+}
+
+// Not public API.
+#[doc(hidden)]
+pub struct Braces<'a> {
+ pub token: token::Brace,
+ pub content: ParseBuffer<'a>,
+}
+
+// Not public API.
+#[doc(hidden)]
+pub struct Brackets<'a> {
+ pub token: token::Bracket,
+ pub content: ParseBuffer<'a>,
+}
+
+// Not public API.
+#[cfg(any(feature = "full", feature = "derive"))]
+#[doc(hidden)]
+pub struct Group<'a> {
+ pub token: token::Group,
+ pub content: ParseBuffer<'a>,
+}
+
+// Not public API.
+#[doc(hidden)]
+pub fn parse_parens<'a>(input: &ParseBuffer<'a>) -> Result<Parens<'a>> {
+ parse_delimited(input, Delimiter::Parenthesis).map(|(span, content)| Parens {
+ token: token::Paren(span),
+ content,
+ })
+}
+
+// Not public API.
+#[doc(hidden)]
+pub fn parse_braces<'a>(input: &ParseBuffer<'a>) -> Result<Braces<'a>> {
+ parse_delimited(input, Delimiter::Brace).map(|(span, content)| Braces {
+ token: token::Brace(span),
+ content,
+ })
+}
+
+// Not public API.
+#[doc(hidden)]
+pub fn parse_brackets<'a>(input: &ParseBuffer<'a>) -> Result<Brackets<'a>> {
+ parse_delimited(input, Delimiter::Bracket).map(|(span, content)| Brackets {
+ token: token::Bracket(span),
+ content,
+ })
+}
+
+#[cfg(any(feature = "full", feature = "derive"))]
+pub(crate) fn parse_group<'a>(input: &ParseBuffer<'a>) -> Result<Group<'a>> {
+ parse_delimited(input, Delimiter::None).map(|(span, content)| Group {
+ token: token::Group(span),
+ content,
+ })
+}
+
+fn parse_delimited<'a>(
+ input: &ParseBuffer<'a>,
+ delimiter: Delimiter,
+) -> Result<(Span, ParseBuffer<'a>)> {
+ input.step(|cursor| {
+ if let Some((content, span, rest)) = cursor.group(delimiter) {
+ let scope = crate::buffer::close_span_of_group(*cursor);
+ let nested = crate::parse::advance_step_cursor(cursor, content);
+ let unexpected = crate::parse::get_unexpected(input);
+ let content = crate::parse::new_parse_buffer(scope, nested, unexpected);
+ Ok(((span, content), rest))
+ } else {
+ let message = match delimiter {
+ Delimiter::Parenthesis => "expected parentheses",
+ Delimiter::Brace => "expected curly braces",
+ Delimiter::Bracket => "expected square brackets",
+ Delimiter::None => "expected invisible group",
+ };
+ Err(cursor.error(message))
+ }
+ })
+}
+
+/// Parse a set of parentheses and expose their content to subsequent parsers.
+///
+/// # Example
+///
+/// ```
+/// # use quote::quote;
+/// #
+/// use syn::{parenthesized, token, Ident, Result, Token, Type};
+/// use syn::parse::{Parse, ParseStream};
+/// use syn::punctuated::Punctuated;
+///
+/// // Parse a simplified tuple struct syntax like:
+/// //
+/// // struct S(A, B);
+/// struct TupleStruct {
+/// struct_token: Token![struct],
+/// ident: Ident,
+/// paren_token: token::Paren,
+/// fields: Punctuated<Type, Token![,]>,
+/// semi_token: Token![;],
+/// }
+///
+/// impl Parse for TupleStruct {
+/// fn parse(input: ParseStream) -> Result<Self> {
+/// let content;
+/// Ok(TupleStruct {
+/// struct_token: input.parse()?,
+/// ident: input.parse()?,
+/// paren_token: parenthesized!(content in input),
+/// fields: content.parse_terminated(Type::parse)?,
+/// semi_token: input.parse()?,
+/// })
+/// }
+/// }
+/// #
+/// # fn main() {
+/// # let input = quote! {
+/// # struct S(A, B);
+/// # };
+/// # syn::parse2::<TupleStruct>(input).unwrap();
+/// # }
+/// ```
+#[macro_export]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+macro_rules! parenthesized {
+ ($content:ident in $cursor:expr) => {
+ match $crate::__private::parse_parens(&$cursor) {
+ $crate::__private::Ok(parens) => {
+ $content = parens.content;
+ parens.token
+ }
+ $crate::__private::Err(error) => {
+ return $crate::__private::Err(error);
+ }
+ }
+ };
+}
+
+/// Parse a set of curly braces and expose their content to subsequent parsers.
+///
+/// # Example
+///
+/// ```
+/// # use quote::quote;
+/// #
+/// use syn::{braced, token, Ident, Result, Token, Type};
+/// use syn::parse::{Parse, ParseStream};
+/// use syn::punctuated::Punctuated;
+///
+/// // Parse a simplified struct syntax like:
+/// //
+/// // struct S {
+/// // a: A,
+/// // b: B,
+/// // }
+/// struct Struct {
+/// struct_token: Token![struct],
+/// ident: Ident,
+/// brace_token: token::Brace,
+/// fields: Punctuated<Field, Token![,]>,
+/// }
+///
+/// struct Field {
+/// name: Ident,
+/// colon_token: Token![:],
+/// ty: Type,
+/// }
+///
+/// impl Parse for Struct {
+/// fn parse(input: ParseStream) -> Result<Self> {
+/// let content;
+/// Ok(Struct {
+/// struct_token: input.parse()?,
+/// ident: input.parse()?,
+/// brace_token: braced!(content in input),
+/// fields: content.parse_terminated(Field::parse)?,
+/// })
+/// }
+/// }
+///
+/// impl Parse for Field {
+/// fn parse(input: ParseStream) -> Result<Self> {
+/// Ok(Field {
+/// name: input.parse()?,
+/// colon_token: input.parse()?,
+/// ty: input.parse()?,
+/// })
+/// }
+/// }
+/// #
+/// # fn main() {
+/// # let input = quote! {
+/// # struct S {
+/// # a: A,
+/// # b: B,
+/// # }
+/// # };
+/// # syn::parse2::<Struct>(input).unwrap();
+/// # }
+/// ```
+#[macro_export]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+macro_rules! braced {
+ ($content:ident in $cursor:expr) => {
+ match $crate::__private::parse_braces(&$cursor) {
+ $crate::__private::Ok(braces) => {
+ $content = braces.content;
+ braces.token
+ }
+ $crate::__private::Err(error) => {
+ return $crate::__private::Err(error);
+ }
+ }
+ };
+}
+
+/// Parse a set of square brackets and expose their content to subsequent
+/// parsers.
+///
+/// # Example
+///
+/// ```
+/// # use quote::quote;
+/// #
+/// use proc_macro2::TokenStream;
+/// use syn::{bracketed, token, Result, Token};
+/// use syn::parse::{Parse, ParseStream};
+///
+/// // Parse an outer attribute like:
+/// //
+/// // #[repr(C, packed)]
+/// struct OuterAttribute {
+/// pound_token: Token![#],
+/// bracket_token: token::Bracket,
+/// content: TokenStream,
+/// }
+///
+/// impl Parse for OuterAttribute {
+/// fn parse(input: ParseStream) -> Result<Self> {
+/// let content;
+/// Ok(OuterAttribute {
+/// pound_token: input.parse()?,
+/// bracket_token: bracketed!(content in input),
+/// content: content.parse()?,
+/// })
+/// }
+/// }
+/// #
+/// # fn main() {
+/// # let input = quote! {
+/// # #[repr(C, packed)]
+/// # };
+/// # syn::parse2::<OuterAttribute>(input).unwrap();
+/// # }
+/// ```
+#[macro_export]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+macro_rules! bracketed {
+ ($content:ident in $cursor:expr) => {
+ match $crate::__private::parse_brackets(&$cursor) {
+ $crate::__private::Ok(brackets) => {
+ $content = brackets.content;
+ brackets.token
+ }
+ $crate::__private::Err(error) => {
+ return $crate::__private::Err(error);
+ }
+ }
+ };
+}
diff --git a/third_party/rust/syn/src/ident.rs b/third_party/rust/syn/src/ident.rs
new file mode 100644
index 0000000000..8e3d8bda97
--- /dev/null
+++ b/third_party/rust/syn/src/ident.rs
@@ -0,0 +1,101 @@
+#[cfg(feature = "parsing")]
+use crate::buffer::Cursor;
+#[cfg(feature = "parsing")]
+use crate::lookahead;
+#[cfg(feature = "parsing")]
+use crate::parse::{Parse, ParseStream, Result};
+#[cfg(feature = "parsing")]
+use crate::token::Token;
+
+pub use proc_macro2::Ident;
+
+#[cfg(feature = "parsing")]
+#[doc(hidden)]
+#[allow(non_snake_case)]
+pub fn Ident(marker: lookahead::TokenMarker) -> Ident {
+ match marker {}
+}
+
+#[cfg(feature = "parsing")]
+fn accept_as_ident(ident: &Ident) -> bool {
+ match ident.to_string().as_str() {
+ "_" |
+ // Based on https://doc.rust-lang.org/grammar.html#keywords
+ // and https://github.com/rust-lang/rfcs/blob/master/text/2421-unreservations-2018.md
+ // and https://github.com/rust-lang/rfcs/blob/master/text/2420-unreserve-proc.md
+ "abstract" | "as" | "become" | "box" | "break" | "const" | "continue" |
+ "crate" | "do" | "else" | "enum" | "extern" | "false" | "final" | "fn" |
+ "for" | "if" | "impl" | "in" | "let" | "loop" | "macro" | "match" |
+ "mod" | "move" | "mut" | "override" | "priv" | "pub" | "ref" |
+ "return" | "Self" | "self" | "static" | "struct" | "super" | "trait" |
+ "true" | "type" | "typeof" | "unsafe" | "unsized" | "use" | "virtual" |
+ "where" | "while" | "yield" => false,
+ _ => true,
+ }
+}
+
+#[cfg(feature = "parsing")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+impl Parse for Ident {
+ fn parse(input: ParseStream) -> Result<Self> {
+ input.step(|cursor| {
+ if let Some((ident, rest)) = cursor.ident() {
+ if accept_as_ident(&ident) {
+ return Ok((ident, rest));
+ }
+ }
+ Err(cursor.error("expected identifier"))
+ })
+ }
+}
+
+#[cfg(feature = "parsing")]
+impl Token for Ident {
+ fn peek(cursor: Cursor) -> bool {
+ if let Some((ident, _rest)) = cursor.ident() {
+ accept_as_ident(&ident)
+ } else {
+ false
+ }
+ }
+
+ fn display() -> &'static str {
+ "identifier"
+ }
+}
+
+macro_rules! ident_from_token {
+ ($token:ident) => {
+ impl From<Token![$token]> for Ident {
+ fn from(token: Token![$token]) -> Ident {
+ Ident::new(stringify!($token), token.span)
+ }
+ }
+ };
+}
+
+ident_from_token!(self);
+ident_from_token!(Self);
+ident_from_token!(super);
+ident_from_token!(crate);
+ident_from_token!(extern);
+
+impl From<Token![_]> for Ident {
+ fn from(token: Token![_]) -> Ident {
+ Ident::new("_", token.span)
+ }
+}
+
+pub fn xid_ok(symbol: &str) -> bool {
+ let mut chars = symbol.chars();
+ let first = chars.next().unwrap();
+ if !(first == '_' || unicode_ident::is_xid_start(first)) {
+ return false;
+ }
+ for ch in chars {
+ if !unicode_ident::is_xid_continue(ch) {
+ return false;
+ }
+ }
+ true
+}
diff --git a/third_party/rust/syn/src/item.rs b/third_party/rust/syn/src/item.rs
new file mode 100644
index 0000000000..a1ef7ab43e
--- /dev/null
+++ b/third_party/rust/syn/src/item.rs
@@ -0,0 +1,3313 @@
+use super::*;
+use crate::derive::{Data, DataEnum, DataStruct, DataUnion, DeriveInput};
+use crate::punctuated::Punctuated;
+use proc_macro2::TokenStream;
+
+#[cfg(feature = "parsing")]
+use std::mem;
+
+ast_enum_of_structs! {
+ /// Things that can appear directly inside of a module or scope.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ #[cfg_attr(not(syn_no_non_exhaustive), non_exhaustive)]
+ pub enum Item {
+ /// A constant item: `const MAX: u16 = 65535`.
+ Const(ItemConst),
+
+ /// An enum definition: `enum Foo<A, B> { A(A), B(B) }`.
+ Enum(ItemEnum),
+
+ /// An `extern crate` item: `extern crate serde`.
+ ExternCrate(ItemExternCrate),
+
+ /// A free-standing function: `fn process(n: usize) -> Result<()> { ...
+ /// }`.
+ Fn(ItemFn),
+
+ /// A block of foreign items: `extern "C" { ... }`.
+ ForeignMod(ItemForeignMod),
+
+ /// An impl block providing trait or associated items: `impl<A> Trait
+ /// for Data<A> { ... }`.
+ Impl(ItemImpl),
+
+ /// A macro invocation, which includes `macro_rules!` definitions.
+ Macro(ItemMacro),
+
+ /// A 2.0-style declarative macro introduced by the `macro` keyword.
+ Macro2(ItemMacro2),
+
+ /// A module or module declaration: `mod m` or `mod m { ... }`.
+ Mod(ItemMod),
+
+ /// A static item: `static BIKE: Shed = Shed(42)`.
+ Static(ItemStatic),
+
+ /// A struct definition: `struct Foo<A> { x: A }`.
+ Struct(ItemStruct),
+
+ /// A trait definition: `pub trait Iterator { ... }`.
+ Trait(ItemTrait),
+
+ /// A trait alias: `pub trait SharableIterator = Iterator + Sync`.
+ TraitAlias(ItemTraitAlias),
+
+ /// A type alias: `type Result<T> = std::result::Result<T, MyError>`.
+ Type(ItemType),
+
+ /// A union definition: `union Foo<A, B> { x: A, y: B }`.
+ Union(ItemUnion),
+
+ /// A use declaration: `use std::collections::HashMap`.
+ Use(ItemUse),
+
+ /// Tokens forming an item not interpreted by Syn.
+ Verbatim(TokenStream),
+
+ // Not public API.
+ //
+ // For testing exhaustiveness in downstream code, use the following idiom:
+ //
+ // match item {
+ // Item::Const(item) => {...}
+ // Item::Enum(item) => {...}
+ // ...
+ // Item::Verbatim(item) => {...}
+ //
+ // #[cfg_attr(test, deny(non_exhaustive_omitted_patterns))]
+ // _ => { /* some sane fallback */ }
+ // }
+ //
+ // This way we fail your tests but don't break your library when adding
+ // a variant. You will be notified by a test failure when a variant is
+ // added, so that you can add code to handle it, but your library will
+ // continue to compile and work for downstream users in the interim.
+ #[cfg(syn_no_non_exhaustive)]
+ #[doc(hidden)]
+ __NonExhaustive,
+ }
+}
+
+ast_struct! {
+ /// A constant item: `const MAX: u16 = 65535`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemConst {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub const_token: Token![const],
+ pub ident: Ident,
+ pub colon_token: Token![:],
+ pub ty: Box<Type>,
+ pub eq_token: Token![=],
+ pub expr: Box<Expr>,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// An enum definition: `enum Foo<A, B> { A(A), B(B) }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemEnum {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub enum_token: Token![enum],
+ pub ident: Ident,
+ pub generics: Generics,
+ pub brace_token: token::Brace,
+ pub variants: Punctuated<Variant, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// An `extern crate` item: `extern crate serde`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemExternCrate {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub extern_token: Token![extern],
+ pub crate_token: Token![crate],
+ pub ident: Ident,
+ pub rename: Option<(Token![as], Ident)>,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A free-standing function: `fn process(n: usize) -> Result<()> { ...
+ /// }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemFn {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub sig: Signature,
+ pub block: Box<Block>,
+ }
+}
+
+ast_struct! {
+ /// A block of foreign items: `extern "C" { ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemForeignMod {
+ pub attrs: Vec<Attribute>,
+ pub abi: Abi,
+ pub brace_token: token::Brace,
+ pub items: Vec<ForeignItem>,
+ }
+}
+
+ast_struct! {
+ /// An impl block providing trait or associated items: `impl<A> Trait
+ /// for Data<A> { ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemImpl {
+ pub attrs: Vec<Attribute>,
+ pub defaultness: Option<Token![default]>,
+ pub unsafety: Option<Token![unsafe]>,
+ pub impl_token: Token![impl],
+ pub generics: Generics,
+ /// Trait this impl implements.
+ pub trait_: Option<(Option<Token![!]>, Path, Token![for])>,
+ /// The Self type of the impl.
+ pub self_ty: Box<Type>,
+ pub brace_token: token::Brace,
+ pub items: Vec<ImplItem>,
+ }
+}
+
+ast_struct! {
+ /// A macro invocation, which includes `macro_rules!` definitions.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemMacro {
+ pub attrs: Vec<Attribute>,
+ /// The `example` in `macro_rules! example { ... }`.
+ pub ident: Option<Ident>,
+ pub mac: Macro,
+ pub semi_token: Option<Token![;]>,
+ }
+}
+
+ast_struct! {
+ /// A 2.0-style declarative macro introduced by the `macro` keyword.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemMacro2 {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub macro_token: Token![macro],
+ pub ident: Ident,
+ pub rules: TokenStream,
+ }
+}
+
+ast_struct! {
+ /// A module or module declaration: `mod m` or `mod m { ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemMod {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub mod_token: Token![mod],
+ pub ident: Ident,
+ pub content: Option<(token::Brace, Vec<Item>)>,
+ pub semi: Option<Token![;]>,
+ }
+}
+
+ast_struct! {
+ /// A static item: `static BIKE: Shed = Shed(42)`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemStatic {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub static_token: Token![static],
+ pub mutability: Option<Token![mut]>,
+ pub ident: Ident,
+ pub colon_token: Token![:],
+ pub ty: Box<Type>,
+ pub eq_token: Token![=],
+ pub expr: Box<Expr>,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A struct definition: `struct Foo<A> { x: A }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemStruct {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub struct_token: Token![struct],
+ pub ident: Ident,
+ pub generics: Generics,
+ pub fields: Fields,
+ pub semi_token: Option<Token![;]>,
+ }
+}
+
+ast_struct! {
+ /// A trait definition: `pub trait Iterator { ... }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemTrait {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub unsafety: Option<Token![unsafe]>,
+ pub auto_token: Option<Token![auto]>,
+ pub trait_token: Token![trait],
+ pub ident: Ident,
+ pub generics: Generics,
+ pub colon_token: Option<Token![:]>,
+ pub supertraits: Punctuated<TypeParamBound, Token![+]>,
+ pub brace_token: token::Brace,
+ pub items: Vec<TraitItem>,
+ }
+}
+
+ast_struct! {
+ /// A trait alias: `pub trait SharableIterator = Iterator + Sync`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemTraitAlias {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub trait_token: Token![trait],
+ pub ident: Ident,
+ pub generics: Generics,
+ pub eq_token: Token![=],
+ pub bounds: Punctuated<TypeParamBound, Token![+]>,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A type alias: `type Result<T> = std::result::Result<T, MyError>`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemType {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub type_token: Token![type],
+ pub ident: Ident,
+ pub generics: Generics,
+ pub eq_token: Token![=],
+ pub ty: Box<Type>,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A union definition: `union Foo<A, B> { x: A, y: B }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemUnion {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub union_token: Token![union],
+ pub ident: Ident,
+ pub generics: Generics,
+ pub fields: FieldsNamed,
+ }
+}
+
+ast_struct! {
+ /// A use declaration: `use std::collections::HashMap`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ItemUse {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub use_token: Token![use],
+ pub leading_colon: Option<Token![::]>,
+ pub tree: UseTree,
+ pub semi_token: Token![;],
+ }
+}
+
+impl Item {
+ #[cfg(feature = "parsing")]
+ pub(crate) fn replace_attrs(&mut self, new: Vec<Attribute>) -> Vec<Attribute> {
+ match self {
+ Item::ExternCrate(ItemExternCrate { attrs, .. })
+ | Item::Use(ItemUse { attrs, .. })
+ | Item::Static(ItemStatic { attrs, .. })
+ | Item::Const(ItemConst { attrs, .. })
+ | Item::Fn(ItemFn { attrs, .. })
+ | Item::Mod(ItemMod { attrs, .. })
+ | Item::ForeignMod(ItemForeignMod { attrs, .. })
+ | Item::Type(ItemType { attrs, .. })
+ | Item::Struct(ItemStruct { attrs, .. })
+ | Item::Enum(ItemEnum { attrs, .. })
+ | Item::Union(ItemUnion { attrs, .. })
+ | Item::Trait(ItemTrait { attrs, .. })
+ | Item::TraitAlias(ItemTraitAlias { attrs, .. })
+ | Item::Impl(ItemImpl { attrs, .. })
+ | Item::Macro(ItemMacro { attrs, .. })
+ | Item::Macro2(ItemMacro2 { attrs, .. }) => mem::replace(attrs, new),
+ Item::Verbatim(_) => Vec::new(),
+
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ }
+ }
+}
+
+impl From<DeriveInput> for Item {
+ fn from(input: DeriveInput) -> Item {
+ match input.data {
+ Data::Struct(data) => Item::Struct(ItemStruct {
+ attrs: input.attrs,
+ vis: input.vis,
+ struct_token: data.struct_token,
+ ident: input.ident,
+ generics: input.generics,
+ fields: data.fields,
+ semi_token: data.semi_token,
+ }),
+ Data::Enum(data) => Item::Enum(ItemEnum {
+ attrs: input.attrs,
+ vis: input.vis,
+ enum_token: data.enum_token,
+ ident: input.ident,
+ generics: input.generics,
+ brace_token: data.brace_token,
+ variants: data.variants,
+ }),
+ Data::Union(data) => Item::Union(ItemUnion {
+ attrs: input.attrs,
+ vis: input.vis,
+ union_token: data.union_token,
+ ident: input.ident,
+ generics: input.generics,
+ fields: data.fields,
+ }),
+ }
+ }
+}
+
+impl From<ItemStruct> for DeriveInput {
+ fn from(input: ItemStruct) -> DeriveInput {
+ DeriveInput {
+ attrs: input.attrs,
+ vis: input.vis,
+ ident: input.ident,
+ generics: input.generics,
+ data: Data::Struct(DataStruct {
+ struct_token: input.struct_token,
+ fields: input.fields,
+ semi_token: input.semi_token,
+ }),
+ }
+ }
+}
+
+impl From<ItemEnum> for DeriveInput {
+ fn from(input: ItemEnum) -> DeriveInput {
+ DeriveInput {
+ attrs: input.attrs,
+ vis: input.vis,
+ ident: input.ident,
+ generics: input.generics,
+ data: Data::Enum(DataEnum {
+ enum_token: input.enum_token,
+ brace_token: input.brace_token,
+ variants: input.variants,
+ }),
+ }
+ }
+}
+
+impl From<ItemUnion> for DeriveInput {
+ fn from(input: ItemUnion) -> DeriveInput {
+ DeriveInput {
+ attrs: input.attrs,
+ vis: input.vis,
+ ident: input.ident,
+ generics: input.generics,
+ data: Data::Union(DataUnion {
+ union_token: input.union_token,
+ fields: input.fields,
+ }),
+ }
+ }
+}
+
+ast_enum_of_structs! {
+ /// A suffix of an import tree in a `use` item: `Type as Renamed` or `*`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub enum UseTree {
+ /// A path prefix of imports in a `use` item: `std::...`.
+ Path(UsePath),
+
+ /// An identifier imported by a `use` item: `HashMap`.
+ Name(UseName),
+
+ /// An renamed identifier imported by a `use` item: `HashMap as Map`.
+ Rename(UseRename),
+
+ /// A glob import in a `use` item: `*`.
+ Glob(UseGlob),
+
+ /// A braced group of imports in a `use` item: `{A, B, C}`.
+ Group(UseGroup),
+ }
+}
+
+ast_struct! {
+ /// A path prefix of imports in a `use` item: `std::...`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct UsePath {
+ pub ident: Ident,
+ pub colon2_token: Token![::],
+ pub tree: Box<UseTree>,
+ }
+}
+
+ast_struct! {
+ /// An identifier imported by a `use` item: `HashMap`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct UseName {
+ pub ident: Ident,
+ }
+}
+
+ast_struct! {
+ /// An renamed identifier imported by a `use` item: `HashMap as Map`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct UseRename {
+ pub ident: Ident,
+ pub as_token: Token![as],
+ pub rename: Ident,
+ }
+}
+
+ast_struct! {
+ /// A glob import in a `use` item: `*`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct UseGlob {
+ pub star_token: Token![*],
+ }
+}
+
+ast_struct! {
+ /// A braced group of imports in a `use` item: `{A, B, C}`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct UseGroup {
+ pub brace_token: token::Brace,
+ pub items: Punctuated<UseTree, Token![,]>,
+ }
+}
+
+ast_enum_of_structs! {
+ /// An item within an `extern` block.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ #[cfg_attr(not(syn_no_non_exhaustive), non_exhaustive)]
+ pub enum ForeignItem {
+ /// A foreign function in an `extern` block.
+ Fn(ForeignItemFn),
+
+ /// A foreign static item in an `extern` block: `static ext: u8`.
+ Static(ForeignItemStatic),
+
+ /// A foreign type in an `extern` block: `type void`.
+ Type(ForeignItemType),
+
+ /// A macro invocation within an extern block.
+ Macro(ForeignItemMacro),
+
+ /// Tokens in an `extern` block not interpreted by Syn.
+ Verbatim(TokenStream),
+
+ // Not public API.
+ //
+ // For testing exhaustiveness in downstream code, use the following idiom:
+ //
+ // match item {
+ // ForeignItem::Fn(item) => {...}
+ // ForeignItem::Static(item) => {...}
+ // ...
+ // ForeignItem::Verbatim(item) => {...}
+ //
+ // #[cfg_attr(test, deny(non_exhaustive_omitted_patterns))]
+ // _ => { /* some sane fallback */ }
+ // }
+ //
+ // This way we fail your tests but don't break your library when adding
+ // a variant. You will be notified by a test failure when a variant is
+ // added, so that you can add code to handle it, but your library will
+ // continue to compile and work for downstream users in the interim.
+ #[cfg(syn_no_non_exhaustive)]
+ #[doc(hidden)]
+ __NonExhaustive,
+ }
+}
+
+ast_struct! {
+ /// A foreign function in an `extern` block.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ForeignItemFn {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub sig: Signature,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A foreign static item in an `extern` block: `static ext: u8`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ForeignItemStatic {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub static_token: Token![static],
+ pub mutability: Option<Token![mut]>,
+ pub ident: Ident,
+ pub colon_token: Token![:],
+ pub ty: Box<Type>,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A foreign type in an `extern` block: `type void`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ForeignItemType {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub type_token: Token![type],
+ pub ident: Ident,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A macro invocation within an extern block.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ForeignItemMacro {
+ pub attrs: Vec<Attribute>,
+ pub mac: Macro,
+ pub semi_token: Option<Token![;]>,
+ }
+}
+
+ast_enum_of_structs! {
+ /// An item declaration within the definition of a trait.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ #[cfg_attr(not(syn_no_non_exhaustive), non_exhaustive)]
+ pub enum TraitItem {
+ /// An associated constant within the definition of a trait.
+ Const(TraitItemConst),
+
+ /// A trait method within the definition of a trait.
+ Method(TraitItemMethod),
+
+ /// An associated type within the definition of a trait.
+ Type(TraitItemType),
+
+ /// A macro invocation within the definition of a trait.
+ Macro(TraitItemMacro),
+
+ /// Tokens within the definition of a trait not interpreted by Syn.
+ Verbatim(TokenStream),
+
+ // Not public API.
+ //
+ // For testing exhaustiveness in downstream code, use the following idiom:
+ //
+ // match item {
+ // TraitItem::Const(item) => {...}
+ // TraitItem::Method(item) => {...}
+ // ...
+ // TraitItem::Verbatim(item) => {...}
+ //
+ // #[cfg_attr(test, deny(non_exhaustive_omitted_patterns))]
+ // _ => { /* some sane fallback */ }
+ // }
+ //
+ // This way we fail your tests but don't break your library when adding
+ // a variant. You will be notified by a test failure when a variant is
+ // added, so that you can add code to handle it, but your library will
+ // continue to compile and work for downstream users in the interim.
+ #[cfg(syn_no_non_exhaustive)]
+ #[doc(hidden)]
+ __NonExhaustive,
+ }
+}
+
+ast_struct! {
+ /// An associated constant within the definition of a trait.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct TraitItemConst {
+ pub attrs: Vec<Attribute>,
+ pub const_token: Token![const],
+ pub ident: Ident,
+ pub colon_token: Token![:],
+ pub ty: Type,
+ pub default: Option<(Token![=], Expr)>,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A trait method within the definition of a trait.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct TraitItemMethod {
+ pub attrs: Vec<Attribute>,
+ pub sig: Signature,
+ pub default: Option<Block>,
+ pub semi_token: Option<Token![;]>,
+ }
+}
+
+ast_struct! {
+ /// An associated type within the definition of a trait.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct TraitItemType {
+ pub attrs: Vec<Attribute>,
+ pub type_token: Token![type],
+ pub ident: Ident,
+ pub generics: Generics,
+ pub colon_token: Option<Token![:]>,
+ pub bounds: Punctuated<TypeParamBound, Token![+]>,
+ pub default: Option<(Token![=], Type)>,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A macro invocation within the definition of a trait.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct TraitItemMacro {
+ pub attrs: Vec<Attribute>,
+ pub mac: Macro,
+ pub semi_token: Option<Token![;]>,
+ }
+}
+
+ast_enum_of_structs! {
+ /// An item within an impl block.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ #[cfg_attr(not(syn_no_non_exhaustive), non_exhaustive)]
+ pub enum ImplItem {
+ /// An associated constant within an impl block.
+ Const(ImplItemConst),
+
+ /// A method within an impl block.
+ Method(ImplItemMethod),
+
+ /// An associated type within an impl block.
+ Type(ImplItemType),
+
+ /// A macro invocation within an impl block.
+ Macro(ImplItemMacro),
+
+ /// Tokens within an impl block not interpreted by Syn.
+ Verbatim(TokenStream),
+
+ // Not public API.
+ //
+ // For testing exhaustiveness in downstream code, use the following idiom:
+ //
+ // match item {
+ // ImplItem::Const(item) => {...}
+ // ImplItem::Method(item) => {...}
+ // ...
+ // ImplItem::Verbatim(item) => {...}
+ //
+ // #[cfg_attr(test, deny(non_exhaustive_omitted_patterns))]
+ // _ => { /* some sane fallback */ }
+ // }
+ //
+ // This way we fail your tests but don't break your library when adding
+ // a variant. You will be notified by a test failure when a variant is
+ // added, so that you can add code to handle it, but your library will
+ // continue to compile and work for downstream users in the interim.
+ #[cfg(syn_no_non_exhaustive)]
+ #[doc(hidden)]
+ __NonExhaustive,
+ }
+}
+
+ast_struct! {
+ /// An associated constant within an impl block.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ImplItemConst {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub defaultness: Option<Token![default]>,
+ pub const_token: Token![const],
+ pub ident: Ident,
+ pub colon_token: Token![:],
+ pub ty: Type,
+ pub eq_token: Token![=],
+ pub expr: Expr,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A method within an impl block.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ImplItemMethod {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub defaultness: Option<Token![default]>,
+ pub sig: Signature,
+ pub block: Block,
+ }
+}
+
+ast_struct! {
+ /// An associated type within an impl block.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ImplItemType {
+ pub attrs: Vec<Attribute>,
+ pub vis: Visibility,
+ pub defaultness: Option<Token![default]>,
+ pub type_token: Token![type],
+ pub ident: Ident,
+ pub generics: Generics,
+ pub eq_token: Token![=],
+ pub ty: Type,
+ pub semi_token: Token![;],
+ }
+}
+
+ast_struct! {
+ /// A macro invocation within an impl block.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct ImplItemMacro {
+ pub attrs: Vec<Attribute>,
+ pub mac: Macro,
+ pub semi_token: Option<Token![;]>,
+ }
+}
+
+ast_struct! {
+ /// A function signature in a trait or implementation: `unsafe fn
+ /// initialize(&self)`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct Signature {
+ pub constness: Option<Token![const]>,
+ pub asyncness: Option<Token![async]>,
+ pub unsafety: Option<Token![unsafe]>,
+ pub abi: Option<Abi>,
+ pub fn_token: Token![fn],
+ pub ident: Ident,
+ pub generics: Generics,
+ pub paren_token: token::Paren,
+ pub inputs: Punctuated<FnArg, Token![,]>,
+ pub variadic: Option<Variadic>,
+ pub output: ReturnType,
+ }
+}
+
+impl Signature {
+ /// A method's `self` receiver, such as `&self` or `self: Box<Self>`.
+ pub fn receiver(&self) -> Option<&FnArg> {
+ let arg = self.inputs.first()?;
+ match arg {
+ FnArg::Receiver(_) => Some(arg),
+ FnArg::Typed(PatType { pat, .. }) => {
+ if let Pat::Ident(PatIdent { ident, .. }) = &**pat {
+ if ident == "self" {
+ return Some(arg);
+ }
+ }
+ None
+ }
+ }
+ }
+}
+
+ast_enum_of_structs! {
+ /// An argument in a function signature: the `n: usize` in `fn f(n: usize)`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub enum FnArg {
+ /// The `self` argument of an associated method, whether taken by value
+ /// or by reference.
+ ///
+ /// Note that `self` receivers with a specified type, such as `self:
+ /// Box<Self>`, are parsed as a `FnArg::Typed`.
+ Receiver(Receiver),
+
+ /// A function argument accepted by pattern and type.
+ Typed(PatType),
+ }
+}
+
+ast_struct! {
+ /// The `self` argument of an associated method, whether taken by value
+ /// or by reference.
+ ///
+ /// Note that `self` receivers with a specified type, such as `self:
+ /// Box<Self>`, are parsed as a `FnArg::Typed`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct Receiver {
+ pub attrs: Vec<Attribute>,
+ pub reference: Option<(Token![&], Option<Lifetime>)>,
+ pub mutability: Option<Token![mut]>,
+ pub self_token: Token![self],
+ }
+}
+
+impl Receiver {
+ pub fn lifetime(&self) -> Option<&Lifetime> {
+ self.reference.as_ref()?.1.as_ref()
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::ext::IdentExt;
+ use crate::parse::discouraged::Speculative;
+ use crate::parse::{Parse, ParseBuffer, ParseStream, Result};
+ use crate::token::Brace;
+ use proc_macro2::{Delimiter, Group, Punct, Spacing, TokenTree};
+ use std::iter::{self, FromIterator};
+
+ crate::custom_keyword!(macro_rules);
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Item {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let begin = input.fork();
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let ahead = input.fork();
+ let vis: Visibility = ahead.parse()?;
+
+ let lookahead = ahead.lookahead1();
+ let mut item = if lookahead.peek(Token![fn]) || peek_signature(&ahead) {
+ let vis: Visibility = input.parse()?;
+ let sig: Signature = input.parse()?;
+ if input.peek(Token![;]) {
+ input.parse::<Token![;]>()?;
+ Ok(Item::Verbatim(verbatim::between(begin, input)))
+ } else {
+ parse_rest_of_fn(input, Vec::new(), vis, sig).map(Item::Fn)
+ }
+ } else if lookahead.peek(Token![extern]) {
+ ahead.parse::<Token![extern]>()?;
+ let lookahead = ahead.lookahead1();
+ if lookahead.peek(Token![crate]) {
+ input.parse().map(Item::ExternCrate)
+ } else if lookahead.peek(token::Brace) {
+ input.parse().map(Item::ForeignMod)
+ } else if lookahead.peek(LitStr) {
+ ahead.parse::<LitStr>()?;
+ let lookahead = ahead.lookahead1();
+ if lookahead.peek(token::Brace) {
+ input.parse().map(Item::ForeignMod)
+ } else {
+ Err(lookahead.error())
+ }
+ } else {
+ Err(lookahead.error())
+ }
+ } else if lookahead.peek(Token![use]) {
+ input.parse().map(Item::Use)
+ } else if lookahead.peek(Token![static]) {
+ let vis = input.parse()?;
+ let static_token = input.parse()?;
+ let mutability = input.parse()?;
+ let ident = input.parse()?;
+ if input.peek(Token![=]) {
+ input.parse::<Token![=]>()?;
+ input.parse::<Expr>()?;
+ input.parse::<Token![;]>()?;
+ Ok(Item::Verbatim(verbatim::between(begin, input)))
+ } else {
+ let colon_token = input.parse()?;
+ let ty = input.parse()?;
+ if input.peek(Token![;]) {
+ input.parse::<Token![;]>()?;
+ Ok(Item::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Ok(Item::Static(ItemStatic {
+ attrs: Vec::new(),
+ vis,
+ static_token,
+ mutability,
+ ident,
+ colon_token,
+ ty,
+ eq_token: input.parse()?,
+ expr: input.parse()?,
+ semi_token: input.parse()?,
+ }))
+ }
+ }
+ } else if lookahead.peek(Token![const]) {
+ ahead.parse::<Token![const]>()?;
+ let lookahead = ahead.lookahead1();
+ if lookahead.peek(Ident) || lookahead.peek(Token![_]) {
+ let vis = input.parse()?;
+ let const_token = input.parse()?;
+ let ident = {
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Ident) || lookahead.peek(Token![_]) {
+ input.call(Ident::parse_any)?
+ } else {
+ return Err(lookahead.error());
+ }
+ };
+ let colon_token = input.parse()?;
+ let ty = input.parse()?;
+ if input.peek(Token![;]) {
+ input.parse::<Token![;]>()?;
+ Ok(Item::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Ok(Item::Const(ItemConst {
+ attrs: Vec::new(),
+ vis,
+ const_token,
+ ident,
+ colon_token,
+ ty,
+ eq_token: input.parse()?,
+ expr: input.parse()?,
+ semi_token: input.parse()?,
+ }))
+ }
+ } else {
+ Err(lookahead.error())
+ }
+ } else if lookahead.peek(Token![unsafe]) {
+ ahead.parse::<Token![unsafe]>()?;
+ let lookahead = ahead.lookahead1();
+ if lookahead.peek(Token![trait])
+ || lookahead.peek(Token![auto]) && ahead.peek2(Token![trait])
+ {
+ input.parse().map(Item::Trait)
+ } else if lookahead.peek(Token![impl]) {
+ let allow_verbatim_impl = true;
+ if let Some(item) = parse_impl(input, allow_verbatim_impl)? {
+ Ok(Item::Impl(item))
+ } else {
+ Ok(Item::Verbatim(verbatim::between(begin, input)))
+ }
+ } else if lookahead.peek(Token![extern]) {
+ input.parse::<Visibility>()?;
+ input.parse::<Token![unsafe]>()?;
+ input.parse::<ItemForeignMod>()?;
+ Ok(Item::Verbatim(verbatim::between(begin, input)))
+ } else if lookahead.peek(Token![mod]) {
+ input.parse::<Visibility>()?;
+ input.parse::<Token![unsafe]>()?;
+ input.parse::<ItemMod>()?;
+ Ok(Item::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Err(lookahead.error())
+ }
+ } else if lookahead.peek(Token![mod]) {
+ input.parse().map(Item::Mod)
+ } else if lookahead.peek(Token![type]) {
+ parse_item_type(begin, input)
+ } else if lookahead.peek(Token![struct]) {
+ input.parse().map(Item::Struct)
+ } else if lookahead.peek(Token![enum]) {
+ input.parse().map(Item::Enum)
+ } else if lookahead.peek(Token![union]) && ahead.peek2(Ident) {
+ input.parse().map(Item::Union)
+ } else if lookahead.peek(Token![trait]) {
+ input.call(parse_trait_or_trait_alias)
+ } else if lookahead.peek(Token![auto]) && ahead.peek2(Token![trait]) {
+ input.parse().map(Item::Trait)
+ } else if lookahead.peek(Token![impl])
+ || lookahead.peek(Token![default]) && !ahead.peek2(Token![!])
+ {
+ let allow_verbatim_impl = true;
+ if let Some(item) = parse_impl(input, allow_verbatim_impl)? {
+ Ok(Item::Impl(item))
+ } else {
+ Ok(Item::Verbatim(verbatim::between(begin, input)))
+ }
+ } else if lookahead.peek(Token![macro]) {
+ input.parse().map(Item::Macro2)
+ } else if vis.is_inherited()
+ && (lookahead.peek(Ident)
+ || lookahead.peek(Token![self])
+ || lookahead.peek(Token![super])
+ || lookahead.peek(Token![crate])
+ || lookahead.peek(Token![::]))
+ {
+ input.parse().map(Item::Macro)
+ } else if ahead.peek(macro_rules) {
+ input.advance_to(&ahead);
+ input.parse::<ItemMacro>()?;
+ Ok(Item::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Err(lookahead.error())
+ }?;
+
+ attrs.extend(item.replace_attrs(Vec::new()));
+ item.replace_attrs(attrs);
+ Ok(item)
+ }
+ }
+
+ struct FlexibleItemType {
+ vis: Visibility,
+ defaultness: Option<Token![default]>,
+ type_token: Token![type],
+ ident: Ident,
+ generics: Generics,
+ colon_token: Option<Token![:]>,
+ bounds: Punctuated<TypeParamBound, Token![+]>,
+ ty: Option<(Token![=], Type)>,
+ semi_token: Token![;],
+ }
+
+ enum WhereClauseLocation {
+ // type Ty<T> where T: 'static = T;
+ BeforeEq,
+ // type Ty<T> = T where T: 'static;
+ #[allow(dead_code)]
+ AfterEq,
+ // TODO: goes away once the migration period on rust-lang/rust#89122 is over
+ Both,
+ }
+
+ impl FlexibleItemType {
+ fn parse(input: ParseStream, where_clause_location: WhereClauseLocation) -> Result<Self> {
+ let vis: Visibility = input.parse()?;
+ let defaultness: Option<Token![default]> = input.parse()?;
+ let type_token: Token![type] = input.parse()?;
+ let ident: Ident = input.parse()?;
+ let mut generics: Generics = input.parse()?;
+ let colon_token: Option<Token![:]> = input.parse()?;
+
+ let mut bounds = Punctuated::new();
+ if colon_token.is_some() {
+ loop {
+ if input.peek(Token![where]) || input.peek(Token![=]) || input.peek(Token![;]) {
+ break;
+ }
+ bounds.push_value(input.parse::<TypeParamBound>()?);
+ if input.peek(Token![where]) || input.peek(Token![=]) || input.peek(Token![;]) {
+ break;
+ }
+ bounds.push_punct(input.parse::<Token![+]>()?);
+ }
+ }
+
+ match where_clause_location {
+ WhereClauseLocation::BeforeEq | WhereClauseLocation::Both => {
+ generics.where_clause = input.parse()?;
+ }
+ _ => {}
+ }
+
+ let ty = if let Some(eq_token) = input.parse()? {
+ Some((eq_token, input.parse::<Type>()?))
+ } else {
+ None
+ };
+
+ match where_clause_location {
+ WhereClauseLocation::AfterEq | WhereClauseLocation::Both
+ if generics.where_clause.is_none() =>
+ {
+ generics.where_clause = input.parse()?;
+ }
+ _ => {}
+ }
+
+ let semi_token: Token![;] = input.parse()?;
+
+ Ok(FlexibleItemType {
+ vis,
+ defaultness,
+ type_token,
+ ident,
+ generics,
+ colon_token,
+ bounds,
+ ty,
+ semi_token,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemMacro {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let path = input.call(Path::parse_mod_style)?;
+ let bang_token: Token![!] = input.parse()?;
+ let ident: Option<Ident> = input.parse()?;
+ let (delimiter, tokens) = input.call(mac::parse_delimiter)?;
+ let semi_token: Option<Token![;]> = if !delimiter.is_brace() {
+ Some(input.parse()?)
+ } else {
+ None
+ };
+ Ok(ItemMacro {
+ attrs,
+ ident,
+ mac: Macro {
+ path,
+ bang_token,
+ delimiter,
+ tokens,
+ },
+ semi_token,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemMacro2 {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let vis: Visibility = input.parse()?;
+ let macro_token: Token![macro] = input.parse()?;
+ let ident: Ident = input.parse()?;
+ let mut rules = TokenStream::new();
+
+ let mut lookahead = input.lookahead1();
+ if lookahead.peek(token::Paren) {
+ let paren_content;
+ let paren_token = parenthesized!(paren_content in input);
+ let args: TokenStream = paren_content.parse()?;
+ let mut args = Group::new(Delimiter::Parenthesis, args);
+ args.set_span(paren_token.span);
+ rules.extend(iter::once(TokenTree::Group(args)));
+ lookahead = input.lookahead1();
+ }
+
+ if lookahead.peek(token::Brace) {
+ let brace_content;
+ let brace_token = braced!(brace_content in input);
+ let body: TokenStream = brace_content.parse()?;
+ let mut body = Group::new(Delimiter::Brace, body);
+ body.set_span(brace_token.span);
+ rules.extend(iter::once(TokenTree::Group(body)));
+ } else {
+ return Err(lookahead.error());
+ }
+
+ Ok(ItemMacro2 {
+ attrs,
+ vis,
+ macro_token,
+ ident,
+ rules,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemExternCrate {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ItemExternCrate {
+ attrs: input.call(Attribute::parse_outer)?,
+ vis: input.parse()?,
+ extern_token: input.parse()?,
+ crate_token: input.parse()?,
+ ident: {
+ if input.peek(Token![self]) {
+ input.call(Ident::parse_any)?
+ } else {
+ input.parse()?
+ }
+ },
+ rename: {
+ if input.peek(Token![as]) {
+ let as_token: Token![as] = input.parse()?;
+ let rename: Ident = if input.peek(Token![_]) {
+ Ident::from(input.parse::<Token![_]>()?)
+ } else {
+ input.parse()?
+ };
+ Some((as_token, rename))
+ } else {
+ None
+ }
+ },
+ semi_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemUse {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ItemUse {
+ attrs: input.call(Attribute::parse_outer)?,
+ vis: input.parse()?,
+ use_token: input.parse()?,
+ leading_colon: input.parse()?,
+ tree: input.parse()?,
+ semi_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for UseTree {
+ fn parse(input: ParseStream) -> Result<UseTree> {
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Ident)
+ || lookahead.peek(Token![self])
+ || lookahead.peek(Token![super])
+ || lookahead.peek(Token![crate])
+ {
+ let ident = input.call(Ident::parse_any)?;
+ if input.peek(Token![::]) {
+ Ok(UseTree::Path(UsePath {
+ ident,
+ colon2_token: input.parse()?,
+ tree: Box::new(input.parse()?),
+ }))
+ } else if input.peek(Token![as]) {
+ Ok(UseTree::Rename(UseRename {
+ ident,
+ as_token: input.parse()?,
+ rename: {
+ if input.peek(Ident) {
+ input.parse()?
+ } else if input.peek(Token![_]) {
+ Ident::from(input.parse::<Token![_]>()?)
+ } else {
+ return Err(input.error("expected identifier or underscore"));
+ }
+ },
+ }))
+ } else {
+ Ok(UseTree::Name(UseName { ident }))
+ }
+ } else if lookahead.peek(Token![*]) {
+ Ok(UseTree::Glob(UseGlob {
+ star_token: input.parse()?,
+ }))
+ } else if lookahead.peek(token::Brace) {
+ let content;
+ Ok(UseTree::Group(UseGroup {
+ brace_token: braced!(content in input),
+ items: content.parse_terminated(UseTree::parse)?,
+ }))
+ } else {
+ Err(lookahead.error())
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemStatic {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ItemStatic {
+ attrs: input.call(Attribute::parse_outer)?,
+ vis: input.parse()?,
+ static_token: input.parse()?,
+ mutability: input.parse()?,
+ ident: input.parse()?,
+ colon_token: input.parse()?,
+ ty: input.parse()?,
+ eq_token: input.parse()?,
+ expr: input.parse()?,
+ semi_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemConst {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ItemConst {
+ attrs: input.call(Attribute::parse_outer)?,
+ vis: input.parse()?,
+ const_token: input.parse()?,
+ ident: {
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Ident) || lookahead.peek(Token![_]) {
+ input.call(Ident::parse_any)?
+ } else {
+ return Err(lookahead.error());
+ }
+ },
+ colon_token: input.parse()?,
+ ty: input.parse()?,
+ eq_token: input.parse()?,
+ expr: input.parse()?,
+ semi_token: input.parse()?,
+ })
+ }
+ }
+
+ fn pop_variadic(args: &mut Punctuated<FnArg, Token![,]>) -> Option<Variadic> {
+ let trailing_punct = args.trailing_punct();
+
+ let last = match args.last_mut()? {
+ FnArg::Typed(last) => last,
+ _ => return None,
+ };
+
+ let ty = match last.ty.as_ref() {
+ Type::Verbatim(ty) => ty,
+ _ => return None,
+ };
+
+ let mut variadic = Variadic {
+ attrs: Vec::new(),
+ dots: parse2(ty.clone()).ok()?,
+ };
+
+ if let Pat::Verbatim(pat) = last.pat.as_ref() {
+ if pat.to_string() == "..." && !trailing_punct {
+ variadic.attrs = mem::replace(&mut last.attrs, Vec::new());
+ args.pop();
+ }
+ }
+
+ Some(variadic)
+ }
+
+ fn variadic_to_tokens(dots: &Token![...]) -> TokenStream {
+ TokenStream::from_iter(vec![
+ TokenTree::Punct({
+ let mut dot = Punct::new('.', Spacing::Joint);
+ dot.set_span(dots.spans[0]);
+ dot
+ }),
+ TokenTree::Punct({
+ let mut dot = Punct::new('.', Spacing::Joint);
+ dot.set_span(dots.spans[1]);
+ dot
+ }),
+ TokenTree::Punct({
+ let mut dot = Punct::new('.', Spacing::Alone);
+ dot.set_span(dots.spans[2]);
+ dot
+ }),
+ ])
+ }
+
+ fn peek_signature(input: ParseStream) -> bool {
+ let fork = input.fork();
+ fork.parse::<Option<Token![const]>>().is_ok()
+ && fork.parse::<Option<Token![async]>>().is_ok()
+ && fork.parse::<Option<Token![unsafe]>>().is_ok()
+ && fork.parse::<Option<Abi>>().is_ok()
+ && fork.peek(Token![fn])
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Signature {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let constness: Option<Token![const]> = input.parse()?;
+ let asyncness: Option<Token![async]> = input.parse()?;
+ let unsafety: Option<Token![unsafe]> = input.parse()?;
+ let abi: Option<Abi> = input.parse()?;
+ let fn_token: Token![fn] = input.parse()?;
+ let ident: Ident = input.parse()?;
+ let mut generics: Generics = input.parse()?;
+
+ let content;
+ let paren_token = parenthesized!(content in input);
+ let mut inputs = parse_fn_args(&content)?;
+ let variadic = pop_variadic(&mut inputs);
+
+ let output: ReturnType = input.parse()?;
+ generics.where_clause = input.parse()?;
+
+ Ok(Signature {
+ constness,
+ asyncness,
+ unsafety,
+ abi,
+ fn_token,
+ ident,
+ generics,
+ paren_token,
+ inputs,
+ variadic,
+ output,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemFn {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let outer_attrs = input.call(Attribute::parse_outer)?;
+ let vis: Visibility = input.parse()?;
+ let sig: Signature = input.parse()?;
+ parse_rest_of_fn(input, outer_attrs, vis, sig)
+ }
+ }
+
+ fn parse_rest_of_fn(
+ input: ParseStream,
+ mut attrs: Vec<Attribute>,
+ vis: Visibility,
+ sig: Signature,
+ ) -> Result<ItemFn> {
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+ let stmts = content.call(Block::parse_within)?;
+
+ Ok(ItemFn {
+ attrs,
+ vis,
+ sig,
+ block: Box::new(Block { brace_token, stmts }),
+ })
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for FnArg {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+
+ let ahead = input.fork();
+ if let Ok(mut receiver) = ahead.parse::<Receiver>() {
+ if !ahead.peek(Token![:]) {
+ input.advance_to(&ahead);
+ receiver.attrs = attrs;
+ return Ok(FnArg::Receiver(receiver));
+ }
+ }
+
+ let mut typed = input.call(fn_arg_typed)?;
+ typed.attrs = attrs;
+ Ok(FnArg::Typed(typed))
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Receiver {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(Receiver {
+ attrs: Vec::new(),
+ reference: {
+ if input.peek(Token![&]) {
+ Some((input.parse()?, input.parse()?))
+ } else {
+ None
+ }
+ },
+ mutability: input.parse()?,
+ self_token: input.parse()?,
+ })
+ }
+ }
+
+ fn parse_fn_args(input: ParseStream) -> Result<Punctuated<FnArg, Token![,]>> {
+ let mut args = Punctuated::new();
+ let mut has_receiver = false;
+
+ while !input.is_empty() {
+ let attrs = input.call(Attribute::parse_outer)?;
+
+ let arg = if let Some(dots) = input.parse::<Option<Token![...]>>()? {
+ FnArg::Typed(PatType {
+ attrs,
+ pat: Box::new(Pat::Verbatim(variadic_to_tokens(&dots))),
+ colon_token: Token![:](dots.spans[0]),
+ ty: Box::new(Type::Verbatim(variadic_to_tokens(&dots))),
+ })
+ } else {
+ let mut arg: FnArg = input.parse()?;
+ match &mut arg {
+ FnArg::Receiver(receiver) if has_receiver => {
+ return Err(Error::new(
+ receiver.self_token.span,
+ "unexpected second method receiver",
+ ));
+ }
+ FnArg::Receiver(receiver) if !args.is_empty() => {
+ return Err(Error::new(
+ receiver.self_token.span,
+ "unexpected method receiver",
+ ));
+ }
+ FnArg::Receiver(receiver) => {
+ has_receiver = true;
+ receiver.attrs = attrs;
+ }
+ FnArg::Typed(arg) => arg.attrs = attrs,
+ }
+ arg
+ };
+ args.push_value(arg);
+
+ if input.is_empty() {
+ break;
+ }
+
+ let comma: Token![,] = input.parse()?;
+ args.push_punct(comma);
+ }
+
+ Ok(args)
+ }
+
+ fn fn_arg_typed(input: ParseStream) -> Result<PatType> {
+ // Hack to parse pre-2018 syntax in
+ // test/ui/rfc-2565-param-attrs/param-attrs-pretty.rs
+ // because the rest of the test case is valuable.
+ if input.peek(Ident) && input.peek2(Token![<]) {
+ let span = input.fork().parse::<Ident>()?.span();
+ return Ok(PatType {
+ attrs: Vec::new(),
+ pat: Box::new(Pat::Wild(PatWild {
+ attrs: Vec::new(),
+ underscore_token: Token![_](span),
+ })),
+ colon_token: Token![:](span),
+ ty: input.parse()?,
+ });
+ }
+
+ Ok(PatType {
+ attrs: Vec::new(),
+ pat: Box::new(pat::parsing::multi_pat(input)?),
+ colon_token: input.parse()?,
+ ty: Box::new(match input.parse::<Option<Token![...]>>()? {
+ Some(dot3) => Type::Verbatim(variadic_to_tokens(&dot3)),
+ None => input.parse()?,
+ }),
+ })
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemMod {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let vis: Visibility = input.parse()?;
+ let mod_token: Token![mod] = input.parse()?;
+ let ident: Ident = input.parse()?;
+
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Token![;]) {
+ Ok(ItemMod {
+ attrs,
+ vis,
+ mod_token,
+ ident,
+ content: None,
+ semi: Some(input.parse()?),
+ })
+ } else if lookahead.peek(token::Brace) {
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+
+ let mut items = Vec::new();
+ while !content.is_empty() {
+ items.push(content.parse()?);
+ }
+
+ Ok(ItemMod {
+ attrs,
+ vis,
+ mod_token,
+ ident,
+ content: Some((brace_token, items)),
+ semi: None,
+ })
+ } else {
+ Err(lookahead.error())
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemForeignMod {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let abi: Abi = input.parse()?;
+
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+ let mut items = Vec::new();
+ while !content.is_empty() {
+ items.push(content.parse()?);
+ }
+
+ Ok(ItemForeignMod {
+ attrs,
+ abi,
+ brace_token,
+ items,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ForeignItem {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let begin = input.fork();
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let ahead = input.fork();
+ let vis: Visibility = ahead.parse()?;
+
+ let lookahead = ahead.lookahead1();
+ let mut item = if lookahead.peek(Token![fn]) || peek_signature(&ahead) {
+ let vis: Visibility = input.parse()?;
+ let sig: Signature = input.parse()?;
+ if input.peek(token::Brace) {
+ let content;
+ braced!(content in input);
+ content.call(Attribute::parse_inner)?;
+ content.call(Block::parse_within)?;
+
+ Ok(ForeignItem::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Ok(ForeignItem::Fn(ForeignItemFn {
+ attrs: Vec::new(),
+ vis,
+ sig,
+ semi_token: input.parse()?,
+ }))
+ }
+ } else if lookahead.peek(Token![static]) {
+ let vis = input.parse()?;
+ let static_token = input.parse()?;
+ let mutability = input.parse()?;
+ let ident = input.parse()?;
+ let colon_token = input.parse()?;
+ let ty = input.parse()?;
+ if input.peek(Token![=]) {
+ input.parse::<Token![=]>()?;
+ input.parse::<Expr>()?;
+ input.parse::<Token![;]>()?;
+ Ok(ForeignItem::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Ok(ForeignItem::Static(ForeignItemStatic {
+ attrs: Vec::new(),
+ vis,
+ static_token,
+ mutability,
+ ident,
+ colon_token,
+ ty,
+ semi_token: input.parse()?,
+ }))
+ }
+ } else if lookahead.peek(Token![type]) {
+ parse_foreign_item_type(begin, input)
+ } else if vis.is_inherited()
+ && (lookahead.peek(Ident)
+ || lookahead.peek(Token![self])
+ || lookahead.peek(Token![super])
+ || lookahead.peek(Token![crate])
+ || lookahead.peek(Token![::]))
+ {
+ input.parse().map(ForeignItem::Macro)
+ } else {
+ Err(lookahead.error())
+ }?;
+
+ let item_attrs = match &mut item {
+ ForeignItem::Fn(item) => &mut item.attrs,
+ ForeignItem::Static(item) => &mut item.attrs,
+ ForeignItem::Type(item) => &mut item.attrs,
+ ForeignItem::Macro(item) => &mut item.attrs,
+ ForeignItem::Verbatim(_) => return Ok(item),
+
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ };
+ attrs.append(item_attrs);
+ *item_attrs = attrs;
+
+ Ok(item)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ForeignItemFn {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let vis: Visibility = input.parse()?;
+ let sig: Signature = input.parse()?;
+ let semi_token: Token![;] = input.parse()?;
+ Ok(ForeignItemFn {
+ attrs,
+ vis,
+ sig,
+ semi_token,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ForeignItemStatic {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ForeignItemStatic {
+ attrs: input.call(Attribute::parse_outer)?,
+ vis: input.parse()?,
+ static_token: input.parse()?,
+ mutability: input.parse()?,
+ ident: input.parse()?,
+ colon_token: input.parse()?,
+ ty: input.parse()?,
+ semi_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ForeignItemType {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ForeignItemType {
+ attrs: input.call(Attribute::parse_outer)?,
+ vis: input.parse()?,
+ type_token: input.parse()?,
+ ident: input.parse()?,
+ semi_token: input.parse()?,
+ })
+ }
+ }
+
+ fn parse_foreign_item_type(begin: ParseBuffer, input: ParseStream) -> Result<ForeignItem> {
+ let FlexibleItemType {
+ vis,
+ defaultness,
+ type_token,
+ ident,
+ generics,
+ colon_token,
+ bounds: _,
+ ty,
+ semi_token,
+ } = FlexibleItemType::parse(input, WhereClauseLocation::BeforeEq)?;
+
+ if defaultness.is_some()
+ || generics.lt_token.is_some()
+ || generics.where_clause.is_some()
+ || colon_token.is_some()
+ || ty.is_some()
+ {
+ Ok(ForeignItem::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Ok(ForeignItem::Type(ForeignItemType {
+ attrs: Vec::new(),
+ vis,
+ type_token,
+ ident,
+ semi_token,
+ }))
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ForeignItemMacro {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let mac: Macro = input.parse()?;
+ let semi_token: Option<Token![;]> = if mac.delimiter.is_brace() {
+ None
+ } else {
+ Some(input.parse()?)
+ };
+ Ok(ForeignItemMacro {
+ attrs,
+ mac,
+ semi_token,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemType {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ItemType {
+ attrs: input.call(Attribute::parse_outer)?,
+ vis: input.parse()?,
+ type_token: input.parse()?,
+ ident: input.parse()?,
+ generics: {
+ let mut generics: Generics = input.parse()?;
+ generics.where_clause = input.parse()?;
+ generics
+ },
+ eq_token: input.parse()?,
+ ty: input.parse()?,
+ semi_token: input.parse()?,
+ })
+ }
+ }
+
+ fn parse_item_type(begin: ParseBuffer, input: ParseStream) -> Result<Item> {
+ let FlexibleItemType {
+ vis,
+ defaultness,
+ type_token,
+ ident,
+ generics,
+ colon_token,
+ bounds: _,
+ ty,
+ semi_token,
+ } = FlexibleItemType::parse(input, WhereClauseLocation::BeforeEq)?;
+
+ if defaultness.is_some() || colon_token.is_some() || ty.is_none() {
+ Ok(Item::Verbatim(verbatim::between(begin, input)))
+ } else {
+ let (eq_token, ty) = ty.unwrap();
+ Ok(Item::Type(ItemType {
+ attrs: Vec::new(),
+ vis,
+ type_token,
+ ident,
+ generics,
+ eq_token,
+ ty: Box::new(ty),
+ semi_token,
+ }))
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemStruct {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let vis = input.parse::<Visibility>()?;
+ let struct_token = input.parse::<Token![struct]>()?;
+ let ident = input.parse::<Ident>()?;
+ let generics = input.parse::<Generics>()?;
+ let (where_clause, fields, semi_token) = derive::parsing::data_struct(input)?;
+ Ok(ItemStruct {
+ attrs,
+ vis,
+ struct_token,
+ ident,
+ generics: Generics {
+ where_clause,
+ ..generics
+ },
+ fields,
+ semi_token,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemEnum {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let vis = input.parse::<Visibility>()?;
+ let enum_token = input.parse::<Token![enum]>()?;
+ let ident = input.parse::<Ident>()?;
+ let generics = input.parse::<Generics>()?;
+ let (where_clause, brace_token, variants) = derive::parsing::data_enum(input)?;
+ Ok(ItemEnum {
+ attrs,
+ vis,
+ enum_token,
+ ident,
+ generics: Generics {
+ where_clause,
+ ..generics
+ },
+ brace_token,
+ variants,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemUnion {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let vis = input.parse::<Visibility>()?;
+ let union_token = input.parse::<Token![union]>()?;
+ let ident = input.parse::<Ident>()?;
+ let generics = input.parse::<Generics>()?;
+ let (where_clause, fields) = derive::parsing::data_union(input)?;
+ Ok(ItemUnion {
+ attrs,
+ vis,
+ union_token,
+ ident,
+ generics: Generics {
+ where_clause,
+ ..generics
+ },
+ fields,
+ })
+ }
+ }
+
+ fn parse_trait_or_trait_alias(input: ParseStream) -> Result<Item> {
+ let (attrs, vis, trait_token, ident, generics) = parse_start_of_trait_alias(input)?;
+ let lookahead = input.lookahead1();
+ if lookahead.peek(token::Brace)
+ || lookahead.peek(Token![:])
+ || lookahead.peek(Token![where])
+ {
+ let unsafety = None;
+ let auto_token = None;
+ parse_rest_of_trait(
+ input,
+ attrs,
+ vis,
+ unsafety,
+ auto_token,
+ trait_token,
+ ident,
+ generics,
+ )
+ .map(Item::Trait)
+ } else if lookahead.peek(Token![=]) {
+ parse_rest_of_trait_alias(input, attrs, vis, trait_token, ident, generics)
+ .map(Item::TraitAlias)
+ } else {
+ Err(lookahead.error())
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemTrait {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let outer_attrs = input.call(Attribute::parse_outer)?;
+ let vis: Visibility = input.parse()?;
+ let unsafety: Option<Token![unsafe]> = input.parse()?;
+ let auto_token: Option<Token![auto]> = input.parse()?;
+ let trait_token: Token![trait] = input.parse()?;
+ let ident: Ident = input.parse()?;
+ let generics: Generics = input.parse()?;
+ parse_rest_of_trait(
+ input,
+ outer_attrs,
+ vis,
+ unsafety,
+ auto_token,
+ trait_token,
+ ident,
+ generics,
+ )
+ }
+ }
+
+ fn parse_rest_of_trait(
+ input: ParseStream,
+ mut attrs: Vec<Attribute>,
+ vis: Visibility,
+ unsafety: Option<Token![unsafe]>,
+ auto_token: Option<Token![auto]>,
+ trait_token: Token![trait],
+ ident: Ident,
+ mut generics: Generics,
+ ) -> Result<ItemTrait> {
+ let colon_token: Option<Token![:]> = input.parse()?;
+
+ let mut supertraits = Punctuated::new();
+ if colon_token.is_some() {
+ loop {
+ if input.peek(Token![where]) || input.peek(token::Brace) {
+ break;
+ }
+ supertraits.push_value(input.parse()?);
+ if input.peek(Token![where]) || input.peek(token::Brace) {
+ break;
+ }
+ supertraits.push_punct(input.parse()?);
+ }
+ }
+
+ generics.where_clause = input.parse()?;
+
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+ let mut items = Vec::new();
+ while !content.is_empty() {
+ items.push(content.parse()?);
+ }
+
+ Ok(ItemTrait {
+ attrs,
+ vis,
+ unsafety,
+ auto_token,
+ trait_token,
+ ident,
+ generics,
+ colon_token,
+ supertraits,
+ brace_token,
+ items,
+ })
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemTraitAlias {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let (attrs, vis, trait_token, ident, generics) = parse_start_of_trait_alias(input)?;
+ parse_rest_of_trait_alias(input, attrs, vis, trait_token, ident, generics)
+ }
+ }
+
+ fn parse_start_of_trait_alias(
+ input: ParseStream,
+ ) -> Result<(Vec<Attribute>, Visibility, Token![trait], Ident, Generics)> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let vis: Visibility = input.parse()?;
+ let trait_token: Token![trait] = input.parse()?;
+ let ident: Ident = input.parse()?;
+ let generics: Generics = input.parse()?;
+ Ok((attrs, vis, trait_token, ident, generics))
+ }
+
+ fn parse_rest_of_trait_alias(
+ input: ParseStream,
+ attrs: Vec<Attribute>,
+ vis: Visibility,
+ trait_token: Token![trait],
+ ident: Ident,
+ mut generics: Generics,
+ ) -> Result<ItemTraitAlias> {
+ let eq_token: Token![=] = input.parse()?;
+
+ let mut bounds = Punctuated::new();
+ loop {
+ if input.peek(Token![where]) || input.peek(Token![;]) {
+ break;
+ }
+ bounds.push_value(input.parse()?);
+ if input.peek(Token![where]) || input.peek(Token![;]) {
+ break;
+ }
+ bounds.push_punct(input.parse()?);
+ }
+
+ generics.where_clause = input.parse()?;
+ let semi_token: Token![;] = input.parse()?;
+
+ Ok(ItemTraitAlias {
+ attrs,
+ vis,
+ trait_token,
+ ident,
+ generics,
+ eq_token,
+ bounds,
+ semi_token,
+ })
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TraitItem {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let begin = input.fork();
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let vis: Visibility = input.parse()?;
+ let defaultness: Option<Token![default]> = input.parse()?;
+ let ahead = input.fork();
+
+ let lookahead = ahead.lookahead1();
+ let mut item = if lookahead.peek(Token![fn]) || peek_signature(&ahead) {
+ input.parse().map(TraitItem::Method)
+ } else if lookahead.peek(Token![const]) {
+ ahead.parse::<Token![const]>()?;
+ let lookahead = ahead.lookahead1();
+ if lookahead.peek(Ident) || lookahead.peek(Token![_]) {
+ input.parse().map(TraitItem::Const)
+ } else if lookahead.peek(Token![async])
+ || lookahead.peek(Token![unsafe])
+ || lookahead.peek(Token![extern])
+ || lookahead.peek(Token![fn])
+ {
+ input.parse().map(TraitItem::Method)
+ } else {
+ Err(lookahead.error())
+ }
+ } else if lookahead.peek(Token![type]) {
+ parse_trait_item_type(begin.fork(), input)
+ } else if lookahead.peek(Ident)
+ || lookahead.peek(Token![self])
+ || lookahead.peek(Token![super])
+ || lookahead.peek(Token![crate])
+ || lookahead.peek(Token![::])
+ {
+ input.parse().map(TraitItem::Macro)
+ } else {
+ Err(lookahead.error())
+ }?;
+
+ match (vis, defaultness) {
+ (Visibility::Inherited, None) => {}
+ _ => return Ok(TraitItem::Verbatim(verbatim::between(begin, input))),
+ }
+
+ let item_attrs = match &mut item {
+ TraitItem::Const(item) => &mut item.attrs,
+ TraitItem::Method(item) => &mut item.attrs,
+ TraitItem::Type(item) => &mut item.attrs,
+ TraitItem::Macro(item) => &mut item.attrs,
+ TraitItem::Verbatim(_) => unreachable!(),
+
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ };
+ attrs.append(item_attrs);
+ *item_attrs = attrs;
+ Ok(item)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TraitItemConst {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(TraitItemConst {
+ attrs: input.call(Attribute::parse_outer)?,
+ const_token: input.parse()?,
+ ident: {
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Ident) || lookahead.peek(Token![_]) {
+ input.call(Ident::parse_any)?
+ } else {
+ return Err(lookahead.error());
+ }
+ },
+ colon_token: input.parse()?,
+ ty: input.parse()?,
+ default: {
+ if input.peek(Token![=]) {
+ let eq_token: Token![=] = input.parse()?;
+ let default: Expr = input.parse()?;
+ Some((eq_token, default))
+ } else {
+ None
+ }
+ },
+ semi_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TraitItemMethod {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let sig: Signature = input.parse()?;
+
+ let lookahead = input.lookahead1();
+ let (brace_token, stmts, semi_token) = if lookahead.peek(token::Brace) {
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+ let stmts = content.call(Block::parse_within)?;
+ (Some(brace_token), stmts, None)
+ } else if lookahead.peek(Token![;]) {
+ let semi_token: Token![;] = input.parse()?;
+ (None, Vec::new(), Some(semi_token))
+ } else {
+ return Err(lookahead.error());
+ };
+
+ Ok(TraitItemMethod {
+ attrs,
+ sig,
+ default: brace_token.map(|brace_token| Block { brace_token, stmts }),
+ semi_token,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TraitItemType {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let type_token: Token![type] = input.parse()?;
+ let ident: Ident = input.parse()?;
+ let mut generics: Generics = input.parse()?;
+ let colon_token: Option<Token![:]> = input.parse()?;
+
+ let mut bounds = Punctuated::new();
+ if colon_token.is_some() {
+ while !input.peek(Token![where]) && !input.peek(Token![=]) && !input.peek(Token![;])
+ {
+ if !bounds.is_empty() {
+ bounds.push_punct(input.parse()?);
+ }
+ bounds.push_value(input.parse()?);
+ }
+ }
+
+ let default = if input.peek(Token![=]) {
+ let eq_token: Token![=] = input.parse()?;
+ let default: Type = input.parse()?;
+ Some((eq_token, default))
+ } else {
+ None
+ };
+
+ generics.where_clause = input.parse()?;
+ let semi_token: Token![;] = input.parse()?;
+
+ Ok(TraitItemType {
+ attrs,
+ type_token,
+ ident,
+ generics,
+ colon_token,
+ bounds,
+ default,
+ semi_token,
+ })
+ }
+ }
+
+ fn parse_trait_item_type(begin: ParseBuffer, input: ParseStream) -> Result<TraitItem> {
+ let FlexibleItemType {
+ vis,
+ defaultness,
+ type_token,
+ ident,
+ generics,
+ colon_token,
+ bounds,
+ ty,
+ semi_token,
+ } = FlexibleItemType::parse(input, WhereClauseLocation::Both)?;
+
+ if defaultness.is_some() || vis.is_some() {
+ Ok(TraitItem::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Ok(TraitItem::Type(TraitItemType {
+ attrs: Vec::new(),
+ type_token,
+ ident,
+ generics,
+ colon_token,
+ bounds,
+ default: ty,
+ semi_token,
+ }))
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TraitItemMacro {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let mac: Macro = input.parse()?;
+ let semi_token: Option<Token![;]> = if mac.delimiter.is_brace() {
+ None
+ } else {
+ Some(input.parse()?)
+ };
+ Ok(TraitItemMacro {
+ attrs,
+ mac,
+ semi_token,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ItemImpl {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_verbatim_impl = false;
+ parse_impl(input, allow_verbatim_impl).map(Option::unwrap)
+ }
+ }
+
+ fn parse_impl(input: ParseStream, allow_verbatim_impl: bool) -> Result<Option<ItemImpl>> {
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let has_visibility = allow_verbatim_impl && input.parse::<Visibility>()?.is_some();
+ let defaultness: Option<Token![default]> = input.parse()?;
+ let unsafety: Option<Token![unsafe]> = input.parse()?;
+ let impl_token: Token![impl] = input.parse()?;
+
+ let has_generics = input.peek(Token![<])
+ && (input.peek2(Token![>])
+ || input.peek2(Token![#])
+ || (input.peek2(Ident) || input.peek2(Lifetime))
+ && (input.peek3(Token![:])
+ || input.peek3(Token![,])
+ || input.peek3(Token![>])
+ || input.peek3(Token![=]))
+ || input.peek2(Token![const]));
+ let mut generics: Generics = if has_generics {
+ input.parse()?
+ } else {
+ Generics::default()
+ };
+
+ let is_const_impl = allow_verbatim_impl
+ && (input.peek(Token![const]) || input.peek(Token![?]) && input.peek2(Token![const]));
+ if is_const_impl {
+ input.parse::<Option<Token![?]>>()?;
+ input.parse::<Token![const]>()?;
+ }
+
+ let begin = input.fork();
+ let polarity = if input.peek(Token![!]) && !input.peek2(token::Brace) {
+ Some(input.parse::<Token![!]>()?)
+ } else {
+ None
+ };
+
+ #[cfg(not(feature = "printing"))]
+ let first_ty_span = input.span();
+ let mut first_ty: Type = input.parse()?;
+ let self_ty: Type;
+ let trait_;
+
+ let is_impl_for = input.peek(Token![for]);
+ if is_impl_for {
+ let for_token: Token![for] = input.parse()?;
+ let mut first_ty_ref = &first_ty;
+ while let Type::Group(ty) = first_ty_ref {
+ first_ty_ref = &ty.elem;
+ }
+ if let Type::Path(TypePath { qself: None, .. }) = first_ty_ref {
+ while let Type::Group(ty) = first_ty {
+ first_ty = *ty.elem;
+ }
+ if let Type::Path(TypePath { qself: None, path }) = first_ty {
+ trait_ = Some((polarity, path, for_token));
+ } else {
+ unreachable!();
+ }
+ } else if !allow_verbatim_impl {
+ #[cfg(feature = "printing")]
+ return Err(Error::new_spanned(first_ty_ref, "expected trait path"));
+ #[cfg(not(feature = "printing"))]
+ return Err(Error::new(first_ty_span, "expected trait path"));
+ } else {
+ trait_ = None;
+ }
+ self_ty = input.parse()?;
+ } else {
+ trait_ = None;
+ self_ty = if polarity.is_none() {
+ first_ty
+ } else {
+ Type::Verbatim(verbatim::between(begin, input))
+ };
+ }
+
+ generics.where_clause = input.parse()?;
+
+ let content;
+ let brace_token = braced!(content in input);
+ attr::parsing::parse_inner(&content, &mut attrs)?;
+
+ let mut items = Vec::new();
+ while !content.is_empty() {
+ items.push(content.parse()?);
+ }
+
+ if has_visibility || is_const_impl || is_impl_for && trait_.is_none() {
+ Ok(None)
+ } else {
+ Ok(Some(ItemImpl {
+ attrs,
+ defaultness,
+ unsafety,
+ impl_token,
+ generics,
+ trait_,
+ self_ty: Box::new(self_ty),
+ brace_token,
+ items,
+ }))
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ImplItem {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let begin = input.fork();
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let ahead = input.fork();
+ let vis: Visibility = ahead.parse()?;
+
+ let mut lookahead = ahead.lookahead1();
+ let defaultness = if lookahead.peek(Token![default]) && !ahead.peek2(Token![!]) {
+ let defaultness: Token![default] = ahead.parse()?;
+ lookahead = ahead.lookahead1();
+ Some(defaultness)
+ } else {
+ None
+ };
+
+ let mut item = if lookahead.peek(Token![fn]) || peek_signature(&ahead) {
+ input.parse().map(ImplItem::Method)
+ } else if lookahead.peek(Token![const]) {
+ let const_token: Token![const] = ahead.parse()?;
+ let lookahead = ahead.lookahead1();
+ if lookahead.peek(Ident) || lookahead.peek(Token![_]) {
+ input.advance_to(&ahead);
+ let ident: Ident = input.call(Ident::parse_any)?;
+ let colon_token: Token![:] = input.parse()?;
+ let ty: Type = input.parse()?;
+ if let Some(eq_token) = input.parse()? {
+ return Ok(ImplItem::Const(ImplItemConst {
+ attrs,
+ vis,
+ defaultness,
+ const_token,
+ ident,
+ colon_token,
+ ty,
+ eq_token,
+ expr: input.parse()?,
+ semi_token: input.parse()?,
+ }));
+ } else {
+ input.parse::<Token![;]>()?;
+ return Ok(ImplItem::Verbatim(verbatim::between(begin, input)));
+ }
+ } else {
+ Err(lookahead.error())
+ }
+ } else if lookahead.peek(Token![type]) {
+ parse_impl_item_type(begin, input)
+ } else if vis.is_inherited()
+ && defaultness.is_none()
+ && (lookahead.peek(Ident)
+ || lookahead.peek(Token![self])
+ || lookahead.peek(Token![super])
+ || lookahead.peek(Token![crate])
+ || lookahead.peek(Token![::]))
+ {
+ input.parse().map(ImplItem::Macro)
+ } else {
+ Err(lookahead.error())
+ }?;
+
+ {
+ let item_attrs = match &mut item {
+ ImplItem::Const(item) => &mut item.attrs,
+ ImplItem::Method(item) => &mut item.attrs,
+ ImplItem::Type(item) => &mut item.attrs,
+ ImplItem::Macro(item) => &mut item.attrs,
+ ImplItem::Verbatim(_) => return Ok(item),
+
+ #[cfg(syn_no_non_exhaustive)]
+ _ => unreachable!(),
+ };
+ attrs.append(item_attrs);
+ *item_attrs = attrs;
+ }
+
+ Ok(item)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ImplItemConst {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(ImplItemConst {
+ attrs: input.call(Attribute::parse_outer)?,
+ vis: input.parse()?,
+ defaultness: input.parse()?,
+ const_token: input.parse()?,
+ ident: {
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Ident) || lookahead.peek(Token![_]) {
+ input.call(Ident::parse_any)?
+ } else {
+ return Err(lookahead.error());
+ }
+ },
+ colon_token: input.parse()?,
+ ty: input.parse()?,
+ eq_token: input.parse()?,
+ expr: input.parse()?,
+ semi_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ImplItemMethod {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut attrs = input.call(Attribute::parse_outer)?;
+ let vis: Visibility = input.parse()?;
+ let defaultness: Option<Token![default]> = input.parse()?;
+ let sig: Signature = input.parse()?;
+
+ let block = if let Some(semi) = input.parse::<Option<Token![;]>>()? {
+ // Accept methods without a body in an impl block because
+ // rustc's *parser* does not reject them (the compilation error
+ // is emitted later than parsing) and it can be useful for macro
+ // DSLs.
+ let mut punct = Punct::new(';', Spacing::Alone);
+ punct.set_span(semi.span);
+ let tokens = TokenStream::from_iter(vec![TokenTree::Punct(punct)]);
+ Block {
+ brace_token: Brace { span: semi.span },
+ stmts: vec![Stmt::Item(Item::Verbatim(tokens))],
+ }
+ } else {
+ let content;
+ let brace_token = braced!(content in input);
+ attrs.extend(content.call(Attribute::parse_inner)?);
+ Block {
+ brace_token,
+ stmts: content.call(Block::parse_within)?,
+ }
+ };
+
+ Ok(ImplItemMethod {
+ attrs,
+ vis,
+ defaultness,
+ sig,
+ block,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ImplItemType {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let vis: Visibility = input.parse()?;
+ let defaultness: Option<Token![default]> = input.parse()?;
+ let type_token: Token![type] = input.parse()?;
+ let ident: Ident = input.parse()?;
+ let mut generics: Generics = input.parse()?;
+ let eq_token: Token![=] = input.parse()?;
+ let ty: Type = input.parse()?;
+ generics.where_clause = input.parse()?;
+ let semi_token: Token![;] = input.parse()?;
+ Ok(ImplItemType {
+ attrs,
+ vis,
+ defaultness,
+ type_token,
+ ident,
+ generics,
+ eq_token,
+ ty,
+ semi_token,
+ })
+ }
+ }
+
+ fn parse_impl_item_type(begin: ParseBuffer, input: ParseStream) -> Result<ImplItem> {
+ let FlexibleItemType {
+ vis,
+ defaultness,
+ type_token,
+ ident,
+ generics,
+ colon_token,
+ bounds: _,
+ ty,
+ semi_token,
+ } = FlexibleItemType::parse(input, WhereClauseLocation::Both)?;
+
+ if colon_token.is_some() || ty.is_none() {
+ Ok(ImplItem::Verbatim(verbatim::between(begin, input)))
+ } else {
+ let (eq_token, ty) = ty.unwrap();
+ Ok(ImplItem::Type(ImplItemType {
+ attrs: Vec::new(),
+ vis,
+ defaultness,
+ type_token,
+ ident,
+ generics,
+ eq_token,
+ ty,
+ semi_token,
+ }))
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ImplItemMacro {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let attrs = input.call(Attribute::parse_outer)?;
+ let mac: Macro = input.parse()?;
+ let semi_token: Option<Token![;]> = if mac.delimiter.is_brace() {
+ None
+ } else {
+ Some(input.parse()?)
+ };
+ Ok(ImplItemMacro {
+ attrs,
+ mac,
+ semi_token,
+ })
+ }
+ }
+
+ impl Visibility {
+ fn is_inherited(&self) -> bool {
+ match *self {
+ Visibility::Inherited => true,
+ _ => false,
+ }
+ }
+ }
+
+ impl MacroDelimiter {
+ fn is_brace(&self) -> bool {
+ match *self {
+ MacroDelimiter::Brace(_) => true,
+ MacroDelimiter::Paren(_) | MacroDelimiter::Bracket(_) => false,
+ }
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use crate::attr::FilterAttrs;
+ use crate::print::TokensOrDefault;
+ use proc_macro2::TokenStream;
+ use quote::{ToTokens, TokenStreamExt};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemExternCrate {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.extern_token.to_tokens(tokens);
+ self.crate_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ if let Some((as_token, rename)) = &self.rename {
+ as_token.to_tokens(tokens);
+ rename.to_tokens(tokens);
+ }
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemUse {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.use_token.to_tokens(tokens);
+ self.leading_colon.to_tokens(tokens);
+ self.tree.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemStatic {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.static_token.to_tokens(tokens);
+ self.mutability.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ self.expr.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemConst {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.const_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ self.expr.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemFn {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.sig.to_tokens(tokens);
+ self.block.brace_token.surround(tokens, |tokens| {
+ tokens.append_all(self.attrs.inner());
+ tokens.append_all(&self.block.stmts);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemMod {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.mod_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ if let Some((brace, items)) = &self.content {
+ brace.surround(tokens, |tokens| {
+ tokens.append_all(self.attrs.inner());
+ tokens.append_all(items);
+ });
+ } else {
+ TokensOrDefault(&self.semi).to_tokens(tokens);
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemForeignMod {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.abi.to_tokens(tokens);
+ self.brace_token.surround(tokens, |tokens| {
+ tokens.append_all(self.attrs.inner());
+ tokens.append_all(&self.items);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemType {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.type_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ self.generics.where_clause.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemEnum {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.enum_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ self.generics.where_clause.to_tokens(tokens);
+ self.brace_token.surround(tokens, |tokens| {
+ self.variants.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemStruct {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.struct_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ match &self.fields {
+ Fields::Named(fields) => {
+ self.generics.where_clause.to_tokens(tokens);
+ fields.to_tokens(tokens);
+ }
+ Fields::Unnamed(fields) => {
+ fields.to_tokens(tokens);
+ self.generics.where_clause.to_tokens(tokens);
+ TokensOrDefault(&self.semi_token).to_tokens(tokens);
+ }
+ Fields::Unit => {
+ self.generics.where_clause.to_tokens(tokens);
+ TokensOrDefault(&self.semi_token).to_tokens(tokens);
+ }
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemUnion {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.union_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ self.generics.where_clause.to_tokens(tokens);
+ self.fields.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemTrait {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.unsafety.to_tokens(tokens);
+ self.auto_token.to_tokens(tokens);
+ self.trait_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ if !self.supertraits.is_empty() {
+ TokensOrDefault(&self.colon_token).to_tokens(tokens);
+ self.supertraits.to_tokens(tokens);
+ }
+ self.generics.where_clause.to_tokens(tokens);
+ self.brace_token.surround(tokens, |tokens| {
+ tokens.append_all(self.attrs.inner());
+ tokens.append_all(&self.items);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemTraitAlias {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.trait_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ self.bounds.to_tokens(tokens);
+ self.generics.where_clause.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemImpl {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.defaultness.to_tokens(tokens);
+ self.unsafety.to_tokens(tokens);
+ self.impl_token.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ if let Some((polarity, path, for_token)) = &self.trait_ {
+ polarity.to_tokens(tokens);
+ path.to_tokens(tokens);
+ for_token.to_tokens(tokens);
+ }
+ self.self_ty.to_tokens(tokens);
+ self.generics.where_clause.to_tokens(tokens);
+ self.brace_token.surround(tokens, |tokens| {
+ tokens.append_all(self.attrs.inner());
+ tokens.append_all(&self.items);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemMacro {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.mac.path.to_tokens(tokens);
+ self.mac.bang_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ match &self.mac.delimiter {
+ MacroDelimiter::Paren(paren) => {
+ paren.surround(tokens, |tokens| self.mac.tokens.to_tokens(tokens));
+ }
+ MacroDelimiter::Brace(brace) => {
+ brace.surround(tokens, |tokens| self.mac.tokens.to_tokens(tokens));
+ }
+ MacroDelimiter::Bracket(bracket) => {
+ bracket.surround(tokens, |tokens| self.mac.tokens.to_tokens(tokens));
+ }
+ }
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ItemMacro2 {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.macro_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.rules.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for UsePath {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.ident.to_tokens(tokens);
+ self.colon2_token.to_tokens(tokens);
+ self.tree.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for UseName {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.ident.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for UseRename {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.ident.to_tokens(tokens);
+ self.as_token.to_tokens(tokens);
+ self.rename.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for UseGlob {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.star_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for UseGroup {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.brace_token.surround(tokens, |tokens| {
+ self.items.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TraitItemConst {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.const_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ if let Some((eq_token, default)) = &self.default {
+ eq_token.to_tokens(tokens);
+ default.to_tokens(tokens);
+ }
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TraitItemMethod {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.sig.to_tokens(tokens);
+ match &self.default {
+ Some(block) => {
+ block.brace_token.surround(tokens, |tokens| {
+ tokens.append_all(self.attrs.inner());
+ tokens.append_all(&block.stmts);
+ });
+ }
+ None => {
+ TokensOrDefault(&self.semi_token).to_tokens(tokens);
+ }
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TraitItemType {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.type_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ if !self.bounds.is_empty() {
+ TokensOrDefault(&self.colon_token).to_tokens(tokens);
+ self.bounds.to_tokens(tokens);
+ }
+ if let Some((eq_token, default)) = &self.default {
+ eq_token.to_tokens(tokens);
+ default.to_tokens(tokens);
+ }
+ self.generics.where_clause.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TraitItemMacro {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.mac.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ImplItemConst {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.defaultness.to_tokens(tokens);
+ self.const_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ self.expr.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ImplItemMethod {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.defaultness.to_tokens(tokens);
+ self.sig.to_tokens(tokens);
+ if self.block.stmts.len() == 1 {
+ if let Stmt::Item(Item::Verbatim(verbatim)) = &self.block.stmts[0] {
+ if verbatim.to_string() == ";" {
+ verbatim.to_tokens(tokens);
+ return;
+ }
+ }
+ }
+ self.block.brace_token.surround(tokens, |tokens| {
+ tokens.append_all(self.attrs.inner());
+ tokens.append_all(&self.block.stmts);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ImplItemType {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.defaultness.to_tokens(tokens);
+ self.type_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ self.generics.where_clause.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ImplItemMacro {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.mac.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ForeignItemFn {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.sig.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ForeignItemStatic {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.static_token.to_tokens(tokens);
+ self.mutability.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ForeignItemType {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.vis.to_tokens(tokens);
+ self.type_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ForeignItemMacro {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.mac.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+
+ fn maybe_variadic_to_tokens(arg: &FnArg, tokens: &mut TokenStream) -> bool {
+ let arg = match arg {
+ FnArg::Typed(arg) => arg,
+ FnArg::Receiver(receiver) => {
+ receiver.to_tokens(tokens);
+ return false;
+ }
+ };
+
+ match arg.ty.as_ref() {
+ Type::Verbatim(ty) if ty.to_string() == "..." => {
+ match arg.pat.as_ref() {
+ Pat::Verbatim(pat) if pat.to_string() == "..." => {
+ tokens.append_all(arg.attrs.outer());
+ pat.to_tokens(tokens);
+ }
+ _ => arg.to_tokens(tokens),
+ }
+ true
+ }
+ _ => {
+ arg.to_tokens(tokens);
+ false
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Signature {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.constness.to_tokens(tokens);
+ self.asyncness.to_tokens(tokens);
+ self.unsafety.to_tokens(tokens);
+ self.abi.to_tokens(tokens);
+ self.fn_token.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ self.generics.to_tokens(tokens);
+ self.paren_token.surround(tokens, |tokens| {
+ let mut last_is_variadic = false;
+ for pair in self.inputs.pairs() {
+ last_is_variadic = maybe_variadic_to_tokens(pair.value(), tokens);
+ pair.punct().to_tokens(tokens);
+ }
+ if self.variadic.is_some() && !last_is_variadic {
+ if !self.inputs.empty_or_trailing() {
+ <Token![,]>::default().to_tokens(tokens);
+ }
+ self.variadic.to_tokens(tokens);
+ }
+ });
+ self.output.to_tokens(tokens);
+ self.generics.where_clause.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Receiver {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ if let Some((ampersand, lifetime)) = &self.reference {
+ ampersand.to_tokens(tokens);
+ lifetime.to_tokens(tokens);
+ }
+ self.mutability.to_tokens(tokens);
+ self.self_token.to_tokens(tokens);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/lib.rs b/third_party/rust/syn/src/lib.rs
new file mode 100644
index 0000000000..e47ba28c6c
--- /dev/null
+++ b/third_party/rust/syn/src/lib.rs
@@ -0,0 +1,984 @@
+//! [![github]](https://github.com/dtolnay/syn)&ensp;[![crates-io]](https://crates.io/crates/syn)&ensp;[![docs-rs]](crate)
+//!
+//! [github]: https://img.shields.io/badge/github-8da0cb?style=for-the-badge&labelColor=555555&logo=github
+//! [crates-io]: https://img.shields.io/badge/crates.io-fc8d62?style=for-the-badge&labelColor=555555&logo=rust
+//! [docs-rs]: https://img.shields.io/badge/docs.rs-66c2a5?style=for-the-badge&labelColor=555555&logo=docs.rs
+//!
+//! <br>
+//!
+//! Syn is a parsing library for parsing a stream of Rust tokens into a syntax
+//! tree of Rust source code.
+//!
+//! Currently this library is geared toward use in Rust procedural macros, but
+//! contains some APIs that may be useful more generally.
+//!
+//! - **Data structures** — Syn provides a complete syntax tree that can
+//! represent any valid Rust source code. The syntax tree is rooted at
+//! [`syn::File`] which represents a full source file, but there are other
+//! entry points that may be useful to procedural macros including
+//! [`syn::Item`], [`syn::Expr`] and [`syn::Type`].
+//!
+//! - **Derives** — Of particular interest to derive macros is
+//! [`syn::DeriveInput`] which is any of the three legal input items to a
+//! derive macro. An example below shows using this type in a library that can
+//! derive implementations of a user-defined trait.
+//!
+//! - **Parsing** — Parsing in Syn is built around [parser functions] with the
+//! signature `fn(ParseStream) -> Result<T>`. Every syntax tree node defined
+//! by Syn is individually parsable and may be used as a building block for
+//! custom syntaxes, or you may dream up your own brand new syntax without
+//! involving any of our syntax tree types.
+//!
+//! - **Location information** — Every token parsed by Syn is associated with a
+//! `Span` that tracks line and column information back to the source of that
+//! token. These spans allow a procedural macro to display detailed error
+//! messages pointing to all the right places in the user's code. There is an
+//! example of this below.
+//!
+//! - **Feature flags** — Functionality is aggressively feature gated so your
+//! procedural macros enable only what they need, and do not pay in compile
+//! time for all the rest.
+//!
+//! [`syn::File`]: File
+//! [`syn::Item`]: Item
+//! [`syn::Expr`]: Expr
+//! [`syn::Type`]: Type
+//! [`syn::DeriveInput`]: DeriveInput
+//! [parser functions]: mod@parse
+//!
+//! <br>
+//!
+//! # Example of a derive macro
+//!
+//! The canonical derive macro using Syn looks like this. We write an ordinary
+//! Rust function tagged with a `proc_macro_derive` attribute and the name of
+//! the trait we are deriving. Any time that derive appears in the user's code,
+//! the Rust compiler passes their data structure as tokens into our macro. We
+//! get to execute arbitrary Rust code to figure out what to do with those
+//! tokens, then hand some tokens back to the compiler to compile into the
+//! user's crate.
+//!
+//! [`TokenStream`]: proc_macro::TokenStream
+//!
+//! ```toml
+//! [dependencies]
+//! syn = "1.0"
+//! quote = "1.0"
+//!
+//! [lib]
+//! proc-macro = true
+//! ```
+//!
+//! ```
+//! # extern crate proc_macro;
+//! #
+//! use proc_macro::TokenStream;
+//! use quote::quote;
+//! use syn::{parse_macro_input, DeriveInput};
+//!
+//! # const IGNORE_TOKENS: &str = stringify! {
+//! #[proc_macro_derive(MyMacro)]
+//! # };
+//! pub fn my_macro(input: TokenStream) -> TokenStream {
+//! // Parse the input tokens into a syntax tree
+//! let input = parse_macro_input!(input as DeriveInput);
+//!
+//! // Build the output, possibly using quasi-quotation
+//! let expanded = quote! {
+//! // ...
+//! };
+//!
+//! // Hand the output tokens back to the compiler
+//! TokenStream::from(expanded)
+//! }
+//! ```
+//!
+//! The [`heapsize`] example directory shows a complete working implementation
+//! of a derive macro. It works on any Rust compiler 1.31+. The example derives
+//! a `HeapSize` trait which computes an estimate of the amount of heap memory
+//! owned by a value.
+//!
+//! [`heapsize`]: https://github.com/dtolnay/syn/tree/master/examples/heapsize
+//!
+//! ```
+//! pub trait HeapSize {
+//! /// Total number of bytes of heap memory owned by `self`.
+//! fn heap_size_of_children(&self) -> usize;
+//! }
+//! ```
+//!
+//! The derive macro allows users to write `#[derive(HeapSize)]` on data
+//! structures in their program.
+//!
+//! ```
+//! # const IGNORE_TOKENS: &str = stringify! {
+//! #[derive(HeapSize)]
+//! # };
+//! struct Demo<'a, T: ?Sized> {
+//! a: Box<T>,
+//! b: u8,
+//! c: &'a str,
+//! d: String,
+//! }
+//! ```
+//!
+//! <p><br></p>
+//!
+//! # Spans and error reporting
+//!
+//! The token-based procedural macro API provides great control over where the
+//! compiler's error messages are displayed in user code. Consider the error the
+//! user sees if one of their field types does not implement `HeapSize`.
+//!
+//! ```
+//! # const IGNORE_TOKENS: &str = stringify! {
+//! #[derive(HeapSize)]
+//! # };
+//! struct Broken {
+//! ok: String,
+//! bad: std::thread::Thread,
+//! }
+//! ```
+//!
+//! By tracking span information all the way through the expansion of a
+//! procedural macro as shown in the `heapsize` example, token-based macros in
+//! Syn are able to trigger errors that directly pinpoint the source of the
+//! problem.
+//!
+//! ```text
+//! error[E0277]: the trait bound `std::thread::Thread: HeapSize` is not satisfied
+//! --> src/main.rs:7:5
+//! |
+//! 7 | bad: std::thread::Thread,
+//! | ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `HeapSize` is not implemented for `Thread`
+//! ```
+//!
+//! <br>
+//!
+//! # Parsing a custom syntax
+//!
+//! The [`lazy-static`] example directory shows the implementation of a
+//! `functionlike!(...)` procedural macro in which the input tokens are parsed
+//! using Syn's parsing API.
+//!
+//! [`lazy-static`]: https://github.com/dtolnay/syn/tree/master/examples/lazy-static
+//!
+//! The example reimplements the popular `lazy_static` crate from crates.io as a
+//! procedural macro.
+//!
+//! ```
+//! # macro_rules! lazy_static {
+//! # ($($tt:tt)*) => {}
+//! # }
+//! #
+//! lazy_static! {
+//! static ref USERNAME: Regex = Regex::new("^[a-z0-9_-]{3,16}$").unwrap();
+//! }
+//! ```
+//!
+//! The implementation shows how to trigger custom warnings and error messages
+//! on the macro input.
+//!
+//! ```text
+//! warning: come on, pick a more creative name
+//! --> src/main.rs:10:16
+//! |
+//! 10 | static ref FOO: String = "lazy_static".to_owned();
+//! | ^^^
+//! ```
+//!
+//! <br>
+//!
+//! # Testing
+//!
+//! When testing macros, we often care not just that the macro can be used
+//! successfully but also that when the macro is provided with invalid input it
+//! produces maximally helpful error messages. Consider using the [`trybuild`]
+//! crate to write tests for errors that are emitted by your macro or errors
+//! detected by the Rust compiler in the expanded code following misuse of the
+//! macro. Such tests help avoid regressions from later refactors that
+//! mistakenly make an error no longer trigger or be less helpful than it used
+//! to be.
+//!
+//! [`trybuild`]: https://github.com/dtolnay/trybuild
+//!
+//! <br>
+//!
+//! # Debugging
+//!
+//! When developing a procedural macro it can be helpful to look at what the
+//! generated code looks like. Use `cargo rustc -- -Zunstable-options
+//! --pretty=expanded` or the [`cargo expand`] subcommand.
+//!
+//! [`cargo expand`]: https://github.com/dtolnay/cargo-expand
+//!
+//! To show the expanded code for some crate that uses your procedural macro,
+//! run `cargo expand` from that crate. To show the expanded code for one of
+//! your own test cases, run `cargo expand --test the_test_case` where the last
+//! argument is the name of the test file without the `.rs` extension.
+//!
+//! This write-up by Brandon W Maister discusses debugging in more detail:
+//! [Debugging Rust's new Custom Derive system][debugging].
+//!
+//! [debugging]: https://quodlibetor.github.io/posts/debugging-rusts-new-custom-derive-system/
+//!
+//! <br>
+//!
+//! # Optional features
+//!
+//! Syn puts a lot of functionality behind optional features in order to
+//! optimize compile time for the most common use cases. The following features
+//! are available.
+//!
+//! - **`derive`** *(enabled by default)* — Data structures for representing the
+//! possible input to a derive macro, including structs and enums and types.
+//! - **`full`** — Data structures for representing the syntax tree of all valid
+//! Rust source code, including items and expressions.
+//! - **`parsing`** *(enabled by default)* — Ability to parse input tokens into
+//! a syntax tree node of a chosen type.
+//! - **`printing`** *(enabled by default)* — Ability to print a syntax tree
+//! node as tokens of Rust source code.
+//! - **`visit`** — Trait for traversing a syntax tree.
+//! - **`visit-mut`** — Trait for traversing and mutating in place a syntax
+//! tree.
+//! - **`fold`** — Trait for transforming an owned syntax tree.
+//! - **`clone-impls`** *(enabled by default)* — Clone impls for all syntax tree
+//! types.
+//! - **`extra-traits`** — Debug, Eq, PartialEq, Hash impls for all syntax tree
+//! types.
+//! - **`proc-macro`** *(enabled by default)* — Runtime dependency on the
+//! dynamic library libproc_macro from rustc toolchain.
+
+// Syn types in rustdoc of other crates get linked to here.
+#![doc(html_root_url = "https://docs.rs/syn/1.0.107")]
+#![cfg_attr(doc_cfg, feature(doc_cfg))]
+#![allow(non_camel_case_types)]
+#![allow(
+ clippy::bool_to_int_with_if,
+ clippy::cast_lossless,
+ clippy::cast_possible_truncation,
+ clippy::cast_possible_wrap,
+ clippy::cast_ptr_alignment,
+ clippy::default_trait_access,
+ clippy::doc_markdown,
+ clippy::expl_impl_clone_on_copy,
+ clippy::explicit_auto_deref,
+ clippy::if_not_else,
+ clippy::inherent_to_string,
+ clippy::items_after_statements,
+ clippy::large_enum_variant,
+ clippy::manual_assert,
+ clippy::match_on_vec_items,
+ clippy::match_same_arms,
+ clippy::match_wildcard_for_single_variants, // clippy bug: https://github.com/rust-lang/rust-clippy/issues/6984
+ clippy::missing_errors_doc,
+ clippy::missing_panics_doc,
+ clippy::module_name_repetitions,
+ clippy::must_use_candidate,
+ clippy::needless_doctest_main,
+ clippy::needless_pass_by_value,
+ clippy::never_loop,
+ clippy::redundant_else,
+ clippy::return_self_not_must_use,
+ clippy::similar_names,
+ clippy::single_match_else,
+ clippy::too_many_arguments,
+ clippy::too_many_lines,
+ clippy::trivially_copy_pass_by_ref,
+ clippy::unnecessary_unwrap,
+ clippy::used_underscore_binding,
+ clippy::wildcard_imports
+)]
+
+#[cfg(all(
+ not(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "wasi"))),
+ feature = "proc-macro"
+))]
+extern crate proc_macro;
+extern crate proc_macro2;
+
+#[cfg(feature = "printing")]
+extern crate quote;
+
+#[macro_use]
+mod macros;
+
+#[cfg(feature = "parsing")]
+#[macro_use]
+mod group;
+
+#[macro_use]
+pub mod token;
+
+mod ident;
+pub use crate::ident::Ident;
+
+#[cfg(any(feature = "full", feature = "derive"))]
+mod attr;
+#[cfg(any(feature = "full", feature = "derive"))]
+pub use crate::attr::{
+ AttrStyle, Attribute, AttributeArgs, Meta, MetaList, MetaNameValue, NestedMeta,
+};
+
+mod bigint;
+
+#[cfg(any(feature = "full", feature = "derive"))]
+mod data;
+#[cfg(any(feature = "full", feature = "derive"))]
+pub use crate::data::{
+ Field, Fields, FieldsNamed, FieldsUnnamed, Variant, VisCrate, VisPublic, VisRestricted,
+ Visibility,
+};
+
+#[cfg(any(feature = "full", feature = "derive"))]
+mod expr;
+#[cfg(feature = "full")]
+pub use crate::expr::{
+ Arm, FieldValue, GenericMethodArgument, Label, MethodTurbofish, RangeLimits,
+};
+#[cfg(any(feature = "full", feature = "derive"))]
+pub use crate::expr::{
+ Expr, ExprArray, ExprAssign, ExprAssignOp, ExprAsync, ExprAwait, ExprBinary, ExprBlock,
+ ExprBox, ExprBreak, ExprCall, ExprCast, ExprClosure, ExprContinue, ExprField, ExprForLoop,
+ ExprGroup, ExprIf, ExprIndex, ExprLet, ExprLit, ExprLoop, ExprMacro, ExprMatch, ExprMethodCall,
+ ExprParen, ExprPath, ExprRange, ExprReference, ExprRepeat, ExprReturn, ExprStruct, ExprTry,
+ ExprTryBlock, ExprTuple, ExprType, ExprUnary, ExprUnsafe, ExprWhile, ExprYield, Index, Member,
+};
+
+#[cfg(any(feature = "full", feature = "derive"))]
+mod generics;
+#[cfg(any(feature = "full", feature = "derive"))]
+pub use crate::generics::{
+ BoundLifetimes, ConstParam, GenericParam, Generics, LifetimeDef, PredicateEq,
+ PredicateLifetime, PredicateType, TraitBound, TraitBoundModifier, TypeParam, TypeParamBound,
+ WhereClause, WherePredicate,
+};
+#[cfg(all(any(feature = "full", feature = "derive"), feature = "printing"))]
+pub use crate::generics::{ImplGenerics, Turbofish, TypeGenerics};
+
+#[cfg(feature = "full")]
+mod item;
+#[cfg(feature = "full")]
+pub use crate::item::{
+ FnArg, ForeignItem, ForeignItemFn, ForeignItemMacro, ForeignItemStatic, ForeignItemType,
+ ImplItem, ImplItemConst, ImplItemMacro, ImplItemMethod, ImplItemType, Item, ItemConst,
+ ItemEnum, ItemExternCrate, ItemFn, ItemForeignMod, ItemImpl, ItemMacro, ItemMacro2, ItemMod,
+ ItemStatic, ItemStruct, ItemTrait, ItemTraitAlias, ItemType, ItemUnion, ItemUse, Receiver,
+ Signature, TraitItem, TraitItemConst, TraitItemMacro, TraitItemMethod, TraitItemType, UseGlob,
+ UseGroup, UseName, UsePath, UseRename, UseTree,
+};
+
+#[cfg(feature = "full")]
+mod file;
+#[cfg(feature = "full")]
+pub use crate::file::File;
+
+mod lifetime;
+pub use crate::lifetime::Lifetime;
+
+mod lit;
+pub use crate::lit::{
+ Lit, LitBool, LitByte, LitByteStr, LitChar, LitFloat, LitInt, LitStr, StrStyle,
+};
+
+#[cfg(any(feature = "full", feature = "derive"))]
+mod mac;
+#[cfg(any(feature = "full", feature = "derive"))]
+pub use crate::mac::{Macro, MacroDelimiter};
+
+#[cfg(any(feature = "full", feature = "derive"))]
+mod derive;
+#[cfg(feature = "derive")]
+pub use crate::derive::{Data, DataEnum, DataStruct, DataUnion, DeriveInput};
+
+#[cfg(any(feature = "full", feature = "derive"))]
+mod op;
+#[cfg(any(feature = "full", feature = "derive"))]
+pub use crate::op::{BinOp, UnOp};
+
+#[cfg(feature = "full")]
+mod stmt;
+#[cfg(feature = "full")]
+pub use crate::stmt::{Block, Local, Stmt};
+
+#[cfg(any(feature = "full", feature = "derive"))]
+mod ty;
+#[cfg(any(feature = "full", feature = "derive"))]
+pub use crate::ty::{
+ Abi, BareFnArg, ReturnType, Type, TypeArray, TypeBareFn, TypeGroup, TypeImplTrait, TypeInfer,
+ TypeMacro, TypeNever, TypeParen, TypePath, TypePtr, TypeReference, TypeSlice, TypeTraitObject,
+ TypeTuple, Variadic,
+};
+
+#[cfg(feature = "full")]
+mod pat;
+#[cfg(feature = "full")]
+pub use crate::pat::{
+ FieldPat, Pat, PatBox, PatIdent, PatLit, PatMacro, PatOr, PatPath, PatRange, PatReference,
+ PatRest, PatSlice, PatStruct, PatTuple, PatTupleStruct, PatType, PatWild,
+};
+
+#[cfg(any(feature = "full", feature = "derive"))]
+mod path;
+#[cfg(any(feature = "full", feature = "derive"))]
+pub use crate::path::{
+ AngleBracketedGenericArguments, Binding, Constraint, GenericArgument,
+ ParenthesizedGenericArguments, Path, PathArguments, PathSegment, QSelf,
+};
+
+#[cfg(feature = "parsing")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+pub mod buffer;
+mod drops;
+#[cfg(feature = "parsing")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+pub mod ext;
+pub mod punctuated;
+#[cfg(all(any(feature = "full", feature = "derive"), feature = "extra-traits"))]
+mod tt;
+
+// Not public API except the `parse_quote!` macro.
+#[cfg(feature = "parsing")]
+#[doc(hidden)]
+pub mod parse_quote;
+
+// Not public API except the `parse_macro_input!` macro.
+#[cfg(all(
+ not(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "wasi"))),
+ feature = "parsing",
+ feature = "proc-macro"
+))]
+#[doc(hidden)]
+pub mod parse_macro_input;
+
+#[cfg(all(feature = "parsing", feature = "printing"))]
+#[cfg_attr(doc_cfg, doc(cfg(all(feature = "parsing", feature = "printing"))))]
+pub mod spanned;
+
+#[cfg(all(feature = "parsing", feature = "full"))]
+mod whitespace;
+
+mod gen {
+ /// Syntax tree traversal to walk a shared borrow of a syntax tree.
+ ///
+ /// Each method of the [`Visit`] trait is a hook that can be overridden to
+ /// customize the behavior when visiting the corresponding type of node. By
+ /// default, every method recursively visits the substructure of the input
+ /// by invoking the right visitor method of each of its fields.
+ ///
+ /// [`Visit`]: visit::Visit
+ ///
+ /// ```
+ /// # use syn::{Attribute, BinOp, Expr, ExprBinary};
+ /// #
+ /// pub trait Visit<'ast> {
+ /// /* ... */
+ ///
+ /// fn visit_expr_binary(&mut self, node: &'ast ExprBinary) {
+ /// visit_expr_binary(self, node);
+ /// }
+ ///
+ /// /* ... */
+ /// # fn visit_attribute(&mut self, node: &'ast Attribute);
+ /// # fn visit_expr(&mut self, node: &'ast Expr);
+ /// # fn visit_bin_op(&mut self, node: &'ast BinOp);
+ /// }
+ ///
+ /// pub fn visit_expr_binary<'ast, V>(v: &mut V, node: &'ast ExprBinary)
+ /// where
+ /// V: Visit<'ast> + ?Sized,
+ /// {
+ /// for attr in &node.attrs {
+ /// v.visit_attribute(attr);
+ /// }
+ /// v.visit_expr(&*node.left);
+ /// v.visit_bin_op(&node.op);
+ /// v.visit_expr(&*node.right);
+ /// }
+ ///
+ /// /* ... */
+ /// ```
+ ///
+ /// *This module is available only if Syn is built with the `"visit"` feature.*
+ ///
+ /// <br>
+ ///
+ /// # Example
+ ///
+ /// This visitor will print the name of every freestanding function in the
+ /// syntax tree, including nested functions.
+ ///
+ /// ```
+ /// // [dependencies]
+ /// // quote = "1.0"
+ /// // syn = { version = "1.0", features = ["full", "visit"] }
+ ///
+ /// use quote::quote;
+ /// use syn::visit::{self, Visit};
+ /// use syn::{File, ItemFn};
+ ///
+ /// struct FnVisitor;
+ ///
+ /// impl<'ast> Visit<'ast> for FnVisitor {
+ /// fn visit_item_fn(&mut self, node: &'ast ItemFn) {
+ /// println!("Function with name={}", node.sig.ident);
+ ///
+ /// // Delegate to the default impl to visit any nested functions.
+ /// visit::visit_item_fn(self, node);
+ /// }
+ /// }
+ ///
+ /// fn main() {
+ /// let code = quote! {
+ /// pub fn f() {
+ /// fn g() {}
+ /// }
+ /// };
+ ///
+ /// let syntax_tree: File = syn::parse2(code).unwrap();
+ /// FnVisitor.visit_file(&syntax_tree);
+ /// }
+ /// ```
+ ///
+ /// The `'ast` lifetime on the input references means that the syntax tree
+ /// outlives the complete recursive visit call, so the visitor is allowed to
+ /// hold on to references into the syntax tree.
+ ///
+ /// ```
+ /// use quote::quote;
+ /// use syn::visit::{self, Visit};
+ /// use syn::{File, ItemFn};
+ ///
+ /// struct FnVisitor<'ast> {
+ /// functions: Vec<&'ast ItemFn>,
+ /// }
+ ///
+ /// impl<'ast> Visit<'ast> for FnVisitor<'ast> {
+ /// fn visit_item_fn(&mut self, node: &'ast ItemFn) {
+ /// self.functions.push(node);
+ /// visit::visit_item_fn(self, node);
+ /// }
+ /// }
+ ///
+ /// fn main() {
+ /// let code = quote! {
+ /// pub fn f() {
+ /// fn g() {}
+ /// }
+ /// };
+ ///
+ /// let syntax_tree: File = syn::parse2(code).unwrap();
+ /// let mut visitor = FnVisitor { functions: Vec::new() };
+ /// visitor.visit_file(&syntax_tree);
+ /// for f in visitor.functions {
+ /// println!("Function with name={}", f.sig.ident);
+ /// }
+ /// }
+ /// ```
+ #[cfg(feature = "visit")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "visit")))]
+ #[rustfmt::skip]
+ pub mod visit;
+
+ /// Syntax tree traversal to mutate an exclusive borrow of a syntax tree in
+ /// place.
+ ///
+ /// Each method of the [`VisitMut`] trait is a hook that can be overridden
+ /// to customize the behavior when mutating the corresponding type of node.
+ /// By default, every method recursively visits the substructure of the
+ /// input by invoking the right visitor method of each of its fields.
+ ///
+ /// [`VisitMut`]: visit_mut::VisitMut
+ ///
+ /// ```
+ /// # use syn::{Attribute, BinOp, Expr, ExprBinary};
+ /// #
+ /// pub trait VisitMut {
+ /// /* ... */
+ ///
+ /// fn visit_expr_binary_mut(&mut self, node: &mut ExprBinary) {
+ /// visit_expr_binary_mut(self, node);
+ /// }
+ ///
+ /// /* ... */
+ /// # fn visit_attribute_mut(&mut self, node: &mut Attribute);
+ /// # fn visit_expr_mut(&mut self, node: &mut Expr);
+ /// # fn visit_bin_op_mut(&mut self, node: &mut BinOp);
+ /// }
+ ///
+ /// pub fn visit_expr_binary_mut<V>(v: &mut V, node: &mut ExprBinary)
+ /// where
+ /// V: VisitMut + ?Sized,
+ /// {
+ /// for attr in &mut node.attrs {
+ /// v.visit_attribute_mut(attr);
+ /// }
+ /// v.visit_expr_mut(&mut *node.left);
+ /// v.visit_bin_op_mut(&mut node.op);
+ /// v.visit_expr_mut(&mut *node.right);
+ /// }
+ ///
+ /// /* ... */
+ /// ```
+ ///
+ /// *This module is available only if Syn is built with the `"visit-mut"`
+ /// feature.*
+ ///
+ /// <br>
+ ///
+ /// # Example
+ ///
+ /// This mut visitor replace occurrences of u256 suffixed integer literals
+ /// like `999u256` with a macro invocation `bigint::u256!(999)`.
+ ///
+ /// ```
+ /// // [dependencies]
+ /// // quote = "1.0"
+ /// // syn = { version = "1.0", features = ["full", "visit-mut"] }
+ ///
+ /// use quote::quote;
+ /// use syn::visit_mut::{self, VisitMut};
+ /// use syn::{parse_quote, Expr, File, Lit, LitInt};
+ ///
+ /// struct BigintReplace;
+ ///
+ /// impl VisitMut for BigintReplace {
+ /// fn visit_expr_mut(&mut self, node: &mut Expr) {
+ /// if let Expr::Lit(expr) = &node {
+ /// if let Lit::Int(int) = &expr.lit {
+ /// if int.suffix() == "u256" {
+ /// let digits = int.base10_digits();
+ /// let unsuffixed: LitInt = syn::parse_str(digits).unwrap();
+ /// *node = parse_quote!(bigint::u256!(#unsuffixed));
+ /// return;
+ /// }
+ /// }
+ /// }
+ ///
+ /// // Delegate to the default impl to visit nested expressions.
+ /// visit_mut::visit_expr_mut(self, node);
+ /// }
+ /// }
+ ///
+ /// fn main() {
+ /// let code = quote! {
+ /// fn main() {
+ /// let _ = 999u256;
+ /// }
+ /// };
+ ///
+ /// let mut syntax_tree: File = syn::parse2(code).unwrap();
+ /// BigintReplace.visit_file_mut(&mut syntax_tree);
+ /// println!("{}", quote!(#syntax_tree));
+ /// }
+ /// ```
+ #[cfg(feature = "visit-mut")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "visit-mut")))]
+ #[rustfmt::skip]
+ pub mod visit_mut;
+
+ /// Syntax tree traversal to transform the nodes of an owned syntax tree.
+ ///
+ /// Each method of the [`Fold`] trait is a hook that can be overridden to
+ /// customize the behavior when transforming the corresponding type of node.
+ /// By default, every method recursively visits the substructure of the
+ /// input by invoking the right visitor method of each of its fields.
+ ///
+ /// [`Fold`]: fold::Fold
+ ///
+ /// ```
+ /// # use syn::{Attribute, BinOp, Expr, ExprBinary};
+ /// #
+ /// pub trait Fold {
+ /// /* ... */
+ ///
+ /// fn fold_expr_binary(&mut self, node: ExprBinary) -> ExprBinary {
+ /// fold_expr_binary(self, node)
+ /// }
+ ///
+ /// /* ... */
+ /// # fn fold_attribute(&mut self, node: Attribute) -> Attribute;
+ /// # fn fold_expr(&mut self, node: Expr) -> Expr;
+ /// # fn fold_bin_op(&mut self, node: BinOp) -> BinOp;
+ /// }
+ ///
+ /// pub fn fold_expr_binary<V>(v: &mut V, node: ExprBinary) -> ExprBinary
+ /// where
+ /// V: Fold + ?Sized,
+ /// {
+ /// ExprBinary {
+ /// attrs: node
+ /// .attrs
+ /// .into_iter()
+ /// .map(|attr| v.fold_attribute(attr))
+ /// .collect(),
+ /// left: Box::new(v.fold_expr(*node.left)),
+ /// op: v.fold_bin_op(node.op),
+ /// right: Box::new(v.fold_expr(*node.right)),
+ /// }
+ /// }
+ ///
+ /// /* ... */
+ /// ```
+ ///
+ /// *This module is available only if Syn is built with the `"fold"` feature.*
+ ///
+ /// <br>
+ ///
+ /// # Example
+ ///
+ /// This fold inserts parentheses to fully parenthesizes any expression.
+ ///
+ /// ```
+ /// // [dependencies]
+ /// // quote = "1.0"
+ /// // syn = { version = "1.0", features = ["fold", "full"] }
+ ///
+ /// use quote::quote;
+ /// use syn::fold::{fold_expr, Fold};
+ /// use syn::{token, Expr, ExprParen};
+ ///
+ /// struct ParenthesizeEveryExpr;
+ ///
+ /// impl Fold for ParenthesizeEveryExpr {
+ /// fn fold_expr(&mut self, expr: Expr) -> Expr {
+ /// Expr::Paren(ExprParen {
+ /// attrs: Vec::new(),
+ /// expr: Box::new(fold_expr(self, expr)),
+ /// paren_token: token::Paren::default(),
+ /// })
+ /// }
+ /// }
+ ///
+ /// fn main() {
+ /// let code = quote! { a() + b(1) * c.d };
+ /// let expr: Expr = syn::parse2(code).unwrap();
+ /// let parenthesized = ParenthesizeEveryExpr.fold_expr(expr);
+ /// println!("{}", quote!(#parenthesized));
+ ///
+ /// // Output: (((a)()) + (((b)((1))) * ((c).d)))
+ /// }
+ /// ```
+ #[cfg(feature = "fold")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "fold")))]
+ #[rustfmt::skip]
+ pub mod fold;
+
+ #[cfg(feature = "clone-impls")]
+ #[rustfmt::skip]
+ mod clone;
+
+ #[cfg(feature = "extra-traits")]
+ #[rustfmt::skip]
+ mod eq;
+
+ #[cfg(feature = "extra-traits")]
+ #[rustfmt::skip]
+ mod hash;
+
+ #[cfg(feature = "extra-traits")]
+ #[rustfmt::skip]
+ mod debug;
+
+ #[cfg(any(feature = "full", feature = "derive"))]
+ #[path = "../gen_helper.rs"]
+ mod helper;
+}
+pub use crate::gen::*;
+
+// Not public API.
+#[doc(hidden)]
+#[path = "export.rs"]
+pub mod __private;
+
+mod custom_keyword;
+mod custom_punctuation;
+mod sealed;
+mod span;
+mod thread;
+
+#[cfg(feature = "parsing")]
+mod lookahead;
+
+#[cfg(feature = "parsing")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+pub mod parse;
+
+#[cfg(feature = "full")]
+mod reserved;
+
+#[cfg(all(any(feature = "full", feature = "derive"), feature = "parsing"))]
+mod verbatim;
+
+#[cfg(all(any(feature = "full", feature = "derive"), feature = "printing"))]
+mod print;
+
+////////////////////////////////////////////////////////////////////////////////
+
+mod error;
+pub use crate::error::{Error, Result};
+
+/// Parse tokens of source code into the chosen syntax tree node.
+///
+/// This is preferred over parsing a string because tokens are able to preserve
+/// information about where in the user's code they were originally written (the
+/// "span" of the token), possibly allowing the compiler to produce better error
+/// messages.
+///
+/// This function parses a `proc_macro::TokenStream` which is the type used for
+/// interop with the compiler in a procedural macro. To parse a
+/// `proc_macro2::TokenStream`, use [`syn::parse2`] instead.
+///
+/// [`syn::parse2`]: parse2
+///
+/// *This function is available only if Syn is built with both the `"parsing"` and
+/// `"proc-macro"` features.*
+///
+/// # Examples
+///
+/// ```
+/// # extern crate proc_macro;
+/// #
+/// use proc_macro::TokenStream;
+/// use quote::quote;
+/// use syn::DeriveInput;
+///
+/// # const IGNORE_TOKENS: &str = stringify! {
+/// #[proc_macro_derive(MyMacro)]
+/// # };
+/// pub fn my_macro(input: TokenStream) -> TokenStream {
+/// // Parse the tokens into a syntax tree
+/// let ast: DeriveInput = syn::parse(input).unwrap();
+///
+/// // Build the output, possibly using quasi-quotation
+/// let expanded = quote! {
+/// /* ... */
+/// };
+///
+/// // Convert into a token stream and return it
+/// expanded.into()
+/// }
+/// ```
+#[cfg(all(
+ not(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "wasi"))),
+ feature = "parsing",
+ feature = "proc-macro"
+))]
+#[cfg_attr(doc_cfg, doc(cfg(all(feature = "parsing", feature = "proc-macro"))))]
+pub fn parse<T: parse::Parse>(tokens: proc_macro::TokenStream) -> Result<T> {
+ parse::Parser::parse(T::parse, tokens)
+}
+
+/// Parse a proc-macro2 token stream into the chosen syntax tree node.
+///
+/// This function will check that the input is fully parsed. If there are
+/// any unparsed tokens at the end of the stream, an error is returned.
+///
+/// This function parses a `proc_macro2::TokenStream` which is commonly useful
+/// when the input comes from a node of the Syn syntax tree, for example the
+/// body tokens of a [`Macro`] node. When in a procedural macro parsing the
+/// `proc_macro::TokenStream` provided by the compiler, use [`syn::parse`]
+/// instead.
+///
+/// [`syn::parse`]: parse()
+///
+/// *This function is available only if Syn is built with the `"parsing"` feature.*
+#[cfg(feature = "parsing")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+pub fn parse2<T: parse::Parse>(tokens: proc_macro2::TokenStream) -> Result<T> {
+ parse::Parser::parse2(T::parse, tokens)
+}
+
+/// Parse a string of Rust code into the chosen syntax tree node.
+///
+/// *This function is available only if Syn is built with the `"parsing"` feature.*
+///
+/// # Hygiene
+///
+/// Every span in the resulting syntax tree will be set to resolve at the macro
+/// call site.
+///
+/// # Examples
+///
+/// ```
+/// use syn::{Expr, Result};
+///
+/// fn run() -> Result<()> {
+/// let code = "assert_eq!(u8::max_value(), 255)";
+/// let expr = syn::parse_str::<Expr>(code)?;
+/// println!("{:#?}", expr);
+/// Ok(())
+/// }
+/// #
+/// # run().unwrap();
+/// ```
+#[cfg(feature = "parsing")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+pub fn parse_str<T: parse::Parse>(s: &str) -> Result<T> {
+ parse::Parser::parse_str(T::parse, s)
+}
+
+// FIXME the name parse_file makes it sound like you might pass in a path to a
+// file, rather than the content.
+/// Parse the content of a file of Rust code.
+///
+/// This is different from `syn::parse_str::<File>(content)` in two ways:
+///
+/// - It discards a leading byte order mark `\u{FEFF}` if the file has one.
+/// - It preserves the shebang line of the file, such as `#!/usr/bin/env rustx`.
+///
+/// If present, either of these would be an error using `from_str`.
+///
+/// *This function is available only if Syn is built with the `"parsing"` and
+/// `"full"` features.*
+///
+/// # Examples
+///
+/// ```no_run
+/// use std::error::Error;
+/// use std::fs::File;
+/// use std::io::Read;
+///
+/// fn run() -> Result<(), Box<Error>> {
+/// let mut file = File::open("path/to/code.rs")?;
+/// let mut content = String::new();
+/// file.read_to_string(&mut content)?;
+///
+/// let ast = syn::parse_file(&content)?;
+/// if let Some(shebang) = ast.shebang {
+/// println!("{}", shebang);
+/// }
+/// println!("{} items", ast.items.len());
+///
+/// Ok(())
+/// }
+/// #
+/// # run().unwrap();
+/// ```
+#[cfg(all(feature = "parsing", feature = "full"))]
+#[cfg_attr(doc_cfg, doc(cfg(all(feature = "parsing", feature = "full"))))]
+pub fn parse_file(mut content: &str) -> Result<File> {
+ // Strip the BOM if it is present
+ const BOM: &str = "\u{feff}";
+ if content.starts_with(BOM) {
+ content = &content[BOM.len()..];
+ }
+
+ let mut shebang = None;
+ if content.starts_with("#!") {
+ let rest = whitespace::skip(&content[2..]);
+ if !rest.starts_with('[') {
+ if let Some(idx) = content.find('\n') {
+ shebang = Some(content[..idx].to_string());
+ content = &content[idx..];
+ } else {
+ shebang = Some(content.to_string());
+ content = "";
+ }
+ }
+ }
+
+ let mut file: File = parse_str(content)?;
+ file.shebang = shebang;
+ Ok(file)
+}
diff --git a/third_party/rust/syn/src/lifetime.rs b/third_party/rust/syn/src/lifetime.rs
new file mode 100644
index 0000000000..5dc1753a84
--- /dev/null
+++ b/third_party/rust/syn/src/lifetime.rs
@@ -0,0 +1,154 @@
+use proc_macro2::{Ident, Span};
+use std::cmp::Ordering;
+use std::fmt::{self, Display};
+use std::hash::{Hash, Hasher};
+
+#[cfg(feature = "parsing")]
+use crate::lookahead;
+
+/// A Rust lifetime: `'a`.
+///
+/// Lifetime names must conform to the following rules:
+///
+/// - Must start with an apostrophe.
+/// - Must not consist of just an apostrophe: `'`.
+/// - Character after the apostrophe must be `_` or a Unicode code point with
+/// the XID_Start property.
+/// - All following characters must be Unicode code points with the XID_Continue
+/// property.
+pub struct Lifetime {
+ pub apostrophe: Span,
+ pub ident: Ident,
+}
+
+impl Lifetime {
+ /// # Panics
+ ///
+ /// Panics if the lifetime does not conform to the bulleted rules above.
+ ///
+ /// # Invocation
+ ///
+ /// ```
+ /// # use proc_macro2::Span;
+ /// # use syn::Lifetime;
+ /// #
+ /// # fn f() -> Lifetime {
+ /// Lifetime::new("'a", Span::call_site())
+ /// # }
+ /// ```
+ pub fn new(symbol: &str, span: Span) -> Self {
+ if !symbol.starts_with('\'') {
+ panic!(
+ "lifetime name must start with apostrophe as in \"'a\", got {:?}",
+ symbol
+ );
+ }
+
+ if symbol == "'" {
+ panic!("lifetime name must not be empty");
+ }
+
+ if !crate::ident::xid_ok(&symbol[1..]) {
+ panic!("{:?} is not a valid lifetime name", symbol);
+ }
+
+ Lifetime {
+ apostrophe: span,
+ ident: Ident::new(&symbol[1..], span),
+ }
+ }
+
+ pub fn span(&self) -> Span {
+ self.apostrophe
+ .join(self.ident.span())
+ .unwrap_or(self.apostrophe)
+ }
+
+ pub fn set_span(&mut self, span: Span) {
+ self.apostrophe = span;
+ self.ident.set_span(span);
+ }
+}
+
+impl Display for Lifetime {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ "'".fmt(formatter)?;
+ self.ident.fmt(formatter)
+ }
+}
+
+impl Clone for Lifetime {
+ fn clone(&self) -> Self {
+ Lifetime {
+ apostrophe: self.apostrophe,
+ ident: self.ident.clone(),
+ }
+ }
+}
+
+impl PartialEq for Lifetime {
+ fn eq(&self, other: &Lifetime) -> bool {
+ self.ident.eq(&other.ident)
+ }
+}
+
+impl Eq for Lifetime {}
+
+impl PartialOrd for Lifetime {
+ fn partial_cmp(&self, other: &Lifetime) -> Option<Ordering> {
+ Some(self.cmp(other))
+ }
+}
+
+impl Ord for Lifetime {
+ fn cmp(&self, other: &Lifetime) -> Ordering {
+ self.ident.cmp(&other.ident)
+ }
+}
+
+impl Hash for Lifetime {
+ fn hash<H: Hasher>(&self, h: &mut H) {
+ self.ident.hash(h);
+ }
+}
+
+#[cfg(feature = "parsing")]
+#[doc(hidden)]
+#[allow(non_snake_case)]
+pub fn Lifetime(marker: lookahead::TokenMarker) -> Lifetime {
+ match marker {}
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::parse::{Parse, ParseStream, Result};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Lifetime {
+ fn parse(input: ParseStream) -> Result<Self> {
+ input.step(|cursor| {
+ cursor
+ .lifetime()
+ .ok_or_else(|| cursor.error("expected lifetime"))
+ })
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use proc_macro2::{Punct, Spacing, TokenStream};
+ use quote::{ToTokens, TokenStreamExt};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Lifetime {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ let mut apostrophe = Punct::new('\'', Spacing::Joint);
+ apostrophe.set_span(self.apostrophe);
+ tokens.append(apostrophe);
+ self.ident.to_tokens(tokens);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/lit.rs b/third_party/rust/syn/src/lit.rs
new file mode 100644
index 0000000000..130b40ed1f
--- /dev/null
+++ b/third_party/rust/syn/src/lit.rs
@@ -0,0 +1,1600 @@
+#[cfg(feature = "parsing")]
+use crate::lookahead;
+#[cfg(feature = "parsing")]
+use crate::parse::{Parse, Parser};
+use crate::{Error, Result};
+use proc_macro2::{Ident, Literal, Span};
+#[cfg(feature = "parsing")]
+use proc_macro2::{TokenStream, TokenTree};
+use std::fmt::{self, Display};
+#[cfg(feature = "extra-traits")]
+use std::hash::{Hash, Hasher};
+use std::str::{self, FromStr};
+
+ast_enum_of_structs! {
+ /// A Rust literal such as a string or integer or boolean.
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: crate::Expr#syntax-tree-enums
+ pub enum Lit {
+ /// A UTF-8 string literal: `"foo"`.
+ Str(LitStr),
+
+ /// A byte string literal: `b"foo"`.
+ ByteStr(LitByteStr),
+
+ /// A byte literal: `b'f'`.
+ Byte(LitByte),
+
+ /// A character literal: `'a'`.
+ Char(LitChar),
+
+ /// An integer literal: `1` or `1u16`.
+ Int(LitInt),
+
+ /// A floating point literal: `1f64` or `1.0e10f64`.
+ ///
+ /// Must be finite. May not be infinite or NaN.
+ Float(LitFloat),
+
+ /// A boolean literal: `true` or `false`.
+ Bool(LitBool),
+
+ /// A raw token literal not interpreted by Syn.
+ Verbatim(Literal),
+ }
+}
+
+ast_struct! {
+ /// A UTF-8 string literal: `"foo"`.
+ pub struct LitStr {
+ repr: Box<LitRepr>,
+ }
+}
+
+ast_struct! {
+ /// A byte string literal: `b"foo"`.
+ pub struct LitByteStr {
+ repr: Box<LitRepr>,
+ }
+}
+
+ast_struct! {
+ /// A byte literal: `b'f'`.
+ pub struct LitByte {
+ repr: Box<LitRepr>,
+ }
+}
+
+ast_struct! {
+ /// A character literal: `'a'`.
+ pub struct LitChar {
+ repr: Box<LitRepr>,
+ }
+}
+
+struct LitRepr {
+ token: Literal,
+ suffix: Box<str>,
+}
+
+ast_struct! {
+ /// An integer literal: `1` or `1u16`.
+ pub struct LitInt {
+ repr: Box<LitIntRepr>,
+ }
+}
+
+struct LitIntRepr {
+ token: Literal,
+ digits: Box<str>,
+ suffix: Box<str>,
+}
+
+ast_struct! {
+ /// A floating point literal: `1f64` or `1.0e10f64`.
+ ///
+ /// Must be finite. May not be infinite or NaN.
+ pub struct LitFloat {
+ repr: Box<LitFloatRepr>,
+ }
+}
+
+struct LitFloatRepr {
+ token: Literal,
+ digits: Box<str>,
+ suffix: Box<str>,
+}
+
+ast_struct! {
+ /// A boolean literal: `true` or `false`.
+ pub struct LitBool {
+ pub value: bool,
+ pub span: Span,
+ }
+}
+
+impl LitStr {
+ pub fn new(value: &str, span: Span) -> Self {
+ let mut token = Literal::string(value);
+ token.set_span(span);
+ LitStr {
+ repr: Box::new(LitRepr {
+ token,
+ suffix: Box::<str>::default(),
+ }),
+ }
+ }
+
+ pub fn value(&self) -> String {
+ let repr = self.repr.token.to_string();
+ let (value, _suffix) = value::parse_lit_str(&repr);
+ String::from(value)
+ }
+
+ /// Parse a syntax tree node from the content of this string literal.
+ ///
+ /// All spans in the syntax tree will point to the span of this `LitStr`.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use proc_macro2::Span;
+ /// use syn::{Attribute, Error, Ident, Lit, Meta, MetaNameValue, Path, Result};
+ ///
+ /// // Parses the path from an attribute that looks like:
+ /// //
+ /// // #[path = "a::b::c"]
+ /// //
+ /// // or returns `None` if the input is some other attribute.
+ /// fn get_path(attr: &Attribute) -> Result<Option<Path>> {
+ /// if !attr.path.is_ident("path") {
+ /// return Ok(None);
+ /// }
+ ///
+ /// match attr.parse_meta()? {
+ /// Meta::NameValue(MetaNameValue { lit: Lit::Str(lit_str), .. }) => {
+ /// lit_str.parse().map(Some)
+ /// }
+ /// _ => {
+ /// let message = "expected #[path = \"...\"]";
+ /// Err(Error::new_spanned(attr, message))
+ /// }
+ /// }
+ /// }
+ /// ```
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse<T: Parse>(&self) -> Result<T> {
+ self.parse_with(T::parse)
+ }
+
+ /// Invoke parser on the content of this string literal.
+ ///
+ /// All spans in the syntax tree will point to the span of this `LitStr`.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// # use proc_macro2::Span;
+ /// # use syn::{LitStr, Result};
+ /// #
+ /// # fn main() -> Result<()> {
+ /// # let lit_str = LitStr::new("a::b::c", Span::call_site());
+ /// #
+ /// # const IGNORE: &str = stringify! {
+ /// let lit_str: LitStr = /* ... */;
+ /// # };
+ ///
+ /// // Parse a string literal like "a::b::c" into a Path, not allowing
+ /// // generic arguments on any of the path segments.
+ /// let basic_path = lit_str.parse_with(syn::Path::parse_mod_style)?;
+ /// #
+ /// # Ok(())
+ /// # }
+ /// ```
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_with<F: Parser>(&self, parser: F) -> Result<F::Output> {
+ use proc_macro2::Group;
+
+ // Token stream with every span replaced by the given one.
+ fn respan_token_stream(stream: TokenStream, span: Span) -> TokenStream {
+ stream
+ .into_iter()
+ .map(|token| respan_token_tree(token, span))
+ .collect()
+ }
+
+ // Token tree with every span replaced by the given one.
+ fn respan_token_tree(mut token: TokenTree, span: Span) -> TokenTree {
+ match &mut token {
+ TokenTree::Group(g) => {
+ let stream = respan_token_stream(g.stream(), span);
+ *g = Group::new(g.delimiter(), stream);
+ g.set_span(span);
+ }
+ other => other.set_span(span),
+ }
+ token
+ }
+
+ // Parse string literal into a token stream with every span equal to the
+ // original literal's span.
+ let mut tokens = TokenStream::from_str(&self.value())?;
+ tokens = respan_token_stream(tokens, self.span());
+
+ parser.parse2(tokens)
+ }
+
+ pub fn span(&self) -> Span {
+ self.repr.token.span()
+ }
+
+ pub fn set_span(&mut self, span: Span) {
+ self.repr.token.set_span(span);
+ }
+
+ pub fn suffix(&self) -> &str {
+ &self.repr.suffix
+ }
+
+ pub fn token(&self) -> Literal {
+ self.repr.token.clone()
+ }
+}
+
+impl LitByteStr {
+ pub fn new(value: &[u8], span: Span) -> Self {
+ let mut token = Literal::byte_string(value);
+ token.set_span(span);
+ LitByteStr {
+ repr: Box::new(LitRepr {
+ token,
+ suffix: Box::<str>::default(),
+ }),
+ }
+ }
+
+ pub fn value(&self) -> Vec<u8> {
+ let repr = self.repr.token.to_string();
+ let (value, _suffix) = value::parse_lit_byte_str(&repr);
+ value
+ }
+
+ pub fn span(&self) -> Span {
+ self.repr.token.span()
+ }
+
+ pub fn set_span(&mut self, span: Span) {
+ self.repr.token.set_span(span);
+ }
+
+ pub fn suffix(&self) -> &str {
+ &self.repr.suffix
+ }
+
+ pub fn token(&self) -> Literal {
+ self.repr.token.clone()
+ }
+}
+
+impl LitByte {
+ pub fn new(value: u8, span: Span) -> Self {
+ let mut token = Literal::u8_suffixed(value);
+ token.set_span(span);
+ LitByte {
+ repr: Box::new(LitRepr {
+ token,
+ suffix: Box::<str>::default(),
+ }),
+ }
+ }
+
+ pub fn value(&self) -> u8 {
+ let repr = self.repr.token.to_string();
+ let (value, _suffix) = value::parse_lit_byte(&repr);
+ value
+ }
+
+ pub fn span(&self) -> Span {
+ self.repr.token.span()
+ }
+
+ pub fn set_span(&mut self, span: Span) {
+ self.repr.token.set_span(span);
+ }
+
+ pub fn suffix(&self) -> &str {
+ &self.repr.suffix
+ }
+
+ pub fn token(&self) -> Literal {
+ self.repr.token.clone()
+ }
+}
+
+impl LitChar {
+ pub fn new(value: char, span: Span) -> Self {
+ let mut token = Literal::character(value);
+ token.set_span(span);
+ LitChar {
+ repr: Box::new(LitRepr {
+ token,
+ suffix: Box::<str>::default(),
+ }),
+ }
+ }
+
+ pub fn value(&self) -> char {
+ let repr = self.repr.token.to_string();
+ let (value, _suffix) = value::parse_lit_char(&repr);
+ value
+ }
+
+ pub fn span(&self) -> Span {
+ self.repr.token.span()
+ }
+
+ pub fn set_span(&mut self, span: Span) {
+ self.repr.token.set_span(span);
+ }
+
+ pub fn suffix(&self) -> &str {
+ &self.repr.suffix
+ }
+
+ pub fn token(&self) -> Literal {
+ self.repr.token.clone()
+ }
+}
+
+impl LitInt {
+ pub fn new(repr: &str, span: Span) -> Self {
+ let (digits, suffix) = match value::parse_lit_int(repr) {
+ Some(parse) => parse,
+ None => panic!("Not an integer literal: `{}`", repr),
+ };
+
+ let mut token = match value::to_literal(repr, &digits, &suffix) {
+ Some(token) => token,
+ None => panic!("Unsupported integer literal: `{}`", repr),
+ };
+
+ token.set_span(span);
+ LitInt {
+ repr: Box::new(LitIntRepr {
+ token,
+ digits,
+ suffix,
+ }),
+ }
+ }
+
+ pub fn base10_digits(&self) -> &str {
+ &self.repr.digits
+ }
+
+ /// Parses the literal into a selected number type.
+ ///
+ /// This is equivalent to `lit.base10_digits().parse()` except that the
+ /// resulting errors will be correctly spanned to point to the literal token
+ /// in the macro input.
+ ///
+ /// ```
+ /// use syn::LitInt;
+ /// use syn::parse::{Parse, ParseStream, Result};
+ ///
+ /// struct Port {
+ /// value: u16,
+ /// }
+ ///
+ /// impl Parse for Port {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// let lit: LitInt = input.parse()?;
+ /// let value = lit.base10_parse::<u16>()?;
+ /// Ok(Port { value })
+ /// }
+ /// }
+ /// ```
+ pub fn base10_parse<N>(&self) -> Result<N>
+ where
+ N: FromStr,
+ N::Err: Display,
+ {
+ self.base10_digits()
+ .parse()
+ .map_err(|err| Error::new(self.span(), err))
+ }
+
+ pub fn suffix(&self) -> &str {
+ &self.repr.suffix
+ }
+
+ pub fn span(&self) -> Span {
+ self.repr.token.span()
+ }
+
+ pub fn set_span(&mut self, span: Span) {
+ self.repr.token.set_span(span);
+ }
+
+ pub fn token(&self) -> Literal {
+ self.repr.token.clone()
+ }
+}
+
+impl From<Literal> for LitInt {
+ fn from(token: Literal) -> Self {
+ let repr = token.to_string();
+ if let Some((digits, suffix)) = value::parse_lit_int(&repr) {
+ LitInt {
+ repr: Box::new(LitIntRepr {
+ token,
+ digits,
+ suffix,
+ }),
+ }
+ } else {
+ panic!("Not an integer literal: `{}`", repr);
+ }
+ }
+}
+
+impl Display for LitInt {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ self.repr.token.fmt(formatter)
+ }
+}
+
+impl LitFloat {
+ pub fn new(repr: &str, span: Span) -> Self {
+ let (digits, suffix) = match value::parse_lit_float(repr) {
+ Some(parse) => parse,
+ None => panic!("Not a float literal: `{}`", repr),
+ };
+
+ let mut token = match value::to_literal(repr, &digits, &suffix) {
+ Some(token) => token,
+ None => panic!("Unsupported float literal: `{}`", repr),
+ };
+
+ token.set_span(span);
+ LitFloat {
+ repr: Box::new(LitFloatRepr {
+ token,
+ digits,
+ suffix,
+ }),
+ }
+ }
+
+ pub fn base10_digits(&self) -> &str {
+ &self.repr.digits
+ }
+
+ pub fn base10_parse<N>(&self) -> Result<N>
+ where
+ N: FromStr,
+ N::Err: Display,
+ {
+ self.base10_digits()
+ .parse()
+ .map_err(|err| Error::new(self.span(), err))
+ }
+
+ pub fn suffix(&self) -> &str {
+ &self.repr.suffix
+ }
+
+ pub fn span(&self) -> Span {
+ self.repr.token.span()
+ }
+
+ pub fn set_span(&mut self, span: Span) {
+ self.repr.token.set_span(span);
+ }
+
+ pub fn token(&self) -> Literal {
+ self.repr.token.clone()
+ }
+}
+
+impl From<Literal> for LitFloat {
+ fn from(token: Literal) -> Self {
+ let repr = token.to_string();
+ if let Some((digits, suffix)) = value::parse_lit_float(&repr) {
+ LitFloat {
+ repr: Box::new(LitFloatRepr {
+ token,
+ digits,
+ suffix,
+ }),
+ }
+ } else {
+ panic!("Not a float literal: `{}`", repr);
+ }
+ }
+}
+
+impl Display for LitFloat {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ self.repr.token.fmt(formatter)
+ }
+}
+
+impl LitBool {
+ pub fn new(value: bool, span: Span) -> Self {
+ LitBool { value, span }
+ }
+
+ pub fn value(&self) -> bool {
+ self.value
+ }
+
+ pub fn span(&self) -> Span {
+ self.span
+ }
+
+ pub fn set_span(&mut self, span: Span) {
+ self.span = span;
+ }
+
+ pub fn token(&self) -> Ident {
+ let s = if self.value { "true" } else { "false" };
+ Ident::new(s, self.span)
+ }
+}
+
+#[cfg(feature = "extra-traits")]
+mod debug_impls {
+ use super::*;
+ use std::fmt::{self, Debug};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Debug for LitStr {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter
+ .debug_struct("LitStr")
+ .field("token", &format_args!("{}", self.repr.token))
+ .finish()
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Debug for LitByteStr {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter
+ .debug_struct("LitByteStr")
+ .field("token", &format_args!("{}", self.repr.token))
+ .finish()
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Debug for LitByte {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter
+ .debug_struct("LitByte")
+ .field("token", &format_args!("{}", self.repr.token))
+ .finish()
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Debug for LitChar {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter
+ .debug_struct("LitChar")
+ .field("token", &format_args!("{}", self.repr.token))
+ .finish()
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Debug for LitInt {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter
+ .debug_struct("LitInt")
+ .field("token", &format_args!("{}", self.repr.token))
+ .finish()
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Debug for LitFloat {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter
+ .debug_struct("LitFloat")
+ .field("token", &format_args!("{}", self.repr.token))
+ .finish()
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Debug for LitBool {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter
+ .debug_struct("LitBool")
+ .field("value", &self.value)
+ .finish()
+ }
+ }
+}
+
+#[cfg(feature = "clone-impls")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for LitRepr {
+ fn clone(&self) -> Self {
+ LitRepr {
+ token: self.token.clone(),
+ suffix: self.suffix.clone(),
+ }
+ }
+}
+
+#[cfg(feature = "clone-impls")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for LitIntRepr {
+ fn clone(&self) -> Self {
+ LitIntRepr {
+ token: self.token.clone(),
+ digits: self.digits.clone(),
+ suffix: self.suffix.clone(),
+ }
+ }
+}
+
+#[cfg(feature = "clone-impls")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for LitFloatRepr {
+ fn clone(&self) -> Self {
+ LitFloatRepr {
+ token: self.token.clone(),
+ digits: self.digits.clone(),
+ suffix: self.suffix.clone(),
+ }
+ }
+}
+
+macro_rules! lit_extra_traits {
+ ($ty:ident) => {
+ #[cfg(feature = "clone-impls")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+ impl Clone for $ty {
+ fn clone(&self) -> Self {
+ $ty {
+ repr: self.repr.clone(),
+ }
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl PartialEq for $ty {
+ fn eq(&self, other: &Self) -> bool {
+ self.repr.token.to_string() == other.repr.token.to_string()
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Hash for $ty {
+ fn hash<H>(&self, state: &mut H)
+ where
+ H: Hasher,
+ {
+ self.repr.token.to_string().hash(state);
+ }
+ }
+
+ #[cfg(feature = "parsing")]
+ #[doc(hidden)]
+ #[allow(non_snake_case)]
+ pub fn $ty(marker: lookahead::TokenMarker) -> $ty {
+ match marker {}
+ }
+ };
+}
+
+lit_extra_traits!(LitStr);
+lit_extra_traits!(LitByteStr);
+lit_extra_traits!(LitByte);
+lit_extra_traits!(LitChar);
+lit_extra_traits!(LitInt);
+lit_extra_traits!(LitFloat);
+
+#[cfg(feature = "parsing")]
+#[doc(hidden)]
+#[allow(non_snake_case)]
+pub fn LitBool(marker: lookahead::TokenMarker) -> LitBool {
+ match marker {}
+}
+
+ast_enum! {
+ /// The style of a string literal, either plain quoted or a raw string like
+ /// `r##"data"##`.
+ pub enum StrStyle #no_visit {
+ /// An ordinary string like `"data"`.
+ Cooked,
+ /// A raw string like `r##"data"##`.
+ ///
+ /// The unsigned integer is the number of `#` symbols used.
+ Raw(usize),
+ }
+}
+
+#[cfg(feature = "parsing")]
+#[doc(hidden)]
+#[allow(non_snake_case)]
+pub fn Lit(marker: lookahead::TokenMarker) -> Lit {
+ match marker {}
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::buffer::Cursor;
+ use crate::parse::{Parse, ParseStream, Result};
+ use proc_macro2::Punct;
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Lit {
+ fn parse(input: ParseStream) -> Result<Self> {
+ input.step(|cursor| {
+ if let Some((lit, rest)) = cursor.literal() {
+ return Ok((Lit::new(lit), rest));
+ }
+
+ if let Some((ident, rest)) = cursor.ident() {
+ let value = ident == "true";
+ if value || ident == "false" {
+ let lit_bool = LitBool {
+ value,
+ span: ident.span(),
+ };
+ return Ok((Lit::Bool(lit_bool), rest));
+ }
+ }
+
+ if let Some((punct, rest)) = cursor.punct() {
+ if punct.as_char() == '-' {
+ if let Some((lit, rest)) = parse_negative_lit(punct, rest) {
+ return Ok((lit, rest));
+ }
+ }
+ }
+
+ Err(cursor.error("expected literal"))
+ })
+ }
+ }
+
+ fn parse_negative_lit(neg: Punct, cursor: Cursor) -> Option<(Lit, Cursor)> {
+ let (lit, rest) = cursor.literal()?;
+
+ let mut span = neg.span();
+ span = span.join(lit.span()).unwrap_or(span);
+
+ let mut repr = lit.to_string();
+ repr.insert(0, '-');
+
+ if let Some((digits, suffix)) = value::parse_lit_int(&repr) {
+ if let Some(mut token) = value::to_literal(&repr, &digits, &suffix) {
+ token.set_span(span);
+ return Some((
+ Lit::Int(LitInt {
+ repr: Box::new(LitIntRepr {
+ token,
+ digits,
+ suffix,
+ }),
+ }),
+ rest,
+ ));
+ }
+ }
+
+ let (digits, suffix) = value::parse_lit_float(&repr)?;
+ let mut token = value::to_literal(&repr, &digits, &suffix)?;
+ token.set_span(span);
+ Some((
+ Lit::Float(LitFloat {
+ repr: Box::new(LitFloatRepr {
+ token,
+ digits,
+ suffix,
+ }),
+ }),
+ rest,
+ ))
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for LitStr {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let head = input.fork();
+ match input.parse() {
+ Ok(Lit::Str(lit)) => Ok(lit),
+ _ => Err(head.error("expected string literal")),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for LitByteStr {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let head = input.fork();
+ match input.parse() {
+ Ok(Lit::ByteStr(lit)) => Ok(lit),
+ _ => Err(head.error("expected byte string literal")),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for LitByte {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let head = input.fork();
+ match input.parse() {
+ Ok(Lit::Byte(lit)) => Ok(lit),
+ _ => Err(head.error("expected byte literal")),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for LitChar {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let head = input.fork();
+ match input.parse() {
+ Ok(Lit::Char(lit)) => Ok(lit),
+ _ => Err(head.error("expected character literal")),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for LitInt {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let head = input.fork();
+ match input.parse() {
+ Ok(Lit::Int(lit)) => Ok(lit),
+ _ => Err(head.error("expected integer literal")),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for LitFloat {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let head = input.fork();
+ match input.parse() {
+ Ok(Lit::Float(lit)) => Ok(lit),
+ _ => Err(head.error("expected floating point literal")),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for LitBool {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let head = input.fork();
+ match input.parse() {
+ Ok(Lit::Bool(lit)) => Ok(lit),
+ _ => Err(head.error("expected boolean literal")),
+ }
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use proc_macro2::TokenStream;
+ use quote::{ToTokens, TokenStreamExt};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for LitStr {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.repr.token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for LitByteStr {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.repr.token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for LitByte {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.repr.token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for LitChar {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.repr.token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for LitInt {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.repr.token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for LitFloat {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.repr.token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for LitBool {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append(self.token());
+ }
+ }
+}
+
+mod value {
+ use super::*;
+ use crate::bigint::BigInt;
+ use std::char;
+ use std::ops::{Index, RangeFrom};
+
+ impl Lit {
+ /// Interpret a Syn literal from a proc-macro2 literal.
+ pub fn new(token: Literal) -> Self {
+ let repr = token.to_string();
+
+ match byte(&repr, 0) {
+ b'"' | b'r' => {
+ let (_, suffix) = parse_lit_str(&repr);
+ return Lit::Str(LitStr {
+ repr: Box::new(LitRepr { token, suffix }),
+ });
+ }
+ b'b' => match byte(&repr, 1) {
+ b'"' | b'r' => {
+ let (_, suffix) = parse_lit_byte_str(&repr);
+ return Lit::ByteStr(LitByteStr {
+ repr: Box::new(LitRepr { token, suffix }),
+ });
+ }
+ b'\'' => {
+ let (_, suffix) = parse_lit_byte(&repr);
+ return Lit::Byte(LitByte {
+ repr: Box::new(LitRepr { token, suffix }),
+ });
+ }
+ _ => {}
+ },
+ b'\'' => {
+ let (_, suffix) = parse_lit_char(&repr);
+ return Lit::Char(LitChar {
+ repr: Box::new(LitRepr { token, suffix }),
+ });
+ }
+ b'0'..=b'9' | b'-' => {
+ if let Some((digits, suffix)) = parse_lit_int(&repr) {
+ return Lit::Int(LitInt {
+ repr: Box::new(LitIntRepr {
+ token,
+ digits,
+ suffix,
+ }),
+ });
+ }
+ if let Some((digits, suffix)) = parse_lit_float(&repr) {
+ return Lit::Float(LitFloat {
+ repr: Box::new(LitFloatRepr {
+ token,
+ digits,
+ suffix,
+ }),
+ });
+ }
+ }
+ b't' | b'f' => {
+ if repr == "true" || repr == "false" {
+ return Lit::Bool(LitBool {
+ value: repr == "true",
+ span: token.span(),
+ });
+ }
+ }
+ _ => {}
+ }
+
+ panic!("Unrecognized literal: `{}`", repr);
+ }
+
+ pub fn suffix(&self) -> &str {
+ match self {
+ Lit::Str(lit) => lit.suffix(),
+ Lit::ByteStr(lit) => lit.suffix(),
+ Lit::Byte(lit) => lit.suffix(),
+ Lit::Char(lit) => lit.suffix(),
+ Lit::Int(lit) => lit.suffix(),
+ Lit::Float(lit) => lit.suffix(),
+ Lit::Bool(_) | Lit::Verbatim(_) => "",
+ }
+ }
+
+ pub fn span(&self) -> Span {
+ match self {
+ Lit::Str(lit) => lit.span(),
+ Lit::ByteStr(lit) => lit.span(),
+ Lit::Byte(lit) => lit.span(),
+ Lit::Char(lit) => lit.span(),
+ Lit::Int(lit) => lit.span(),
+ Lit::Float(lit) => lit.span(),
+ Lit::Bool(lit) => lit.span,
+ Lit::Verbatim(lit) => lit.span(),
+ }
+ }
+
+ pub fn set_span(&mut self, span: Span) {
+ match self {
+ Lit::Str(lit) => lit.set_span(span),
+ Lit::ByteStr(lit) => lit.set_span(span),
+ Lit::Byte(lit) => lit.set_span(span),
+ Lit::Char(lit) => lit.set_span(span),
+ Lit::Int(lit) => lit.set_span(span),
+ Lit::Float(lit) => lit.set_span(span),
+ Lit::Bool(lit) => lit.span = span,
+ Lit::Verbatim(lit) => lit.set_span(span),
+ }
+ }
+ }
+
+ /// Get the byte at offset idx, or a default of `b'\0'` if we're looking
+ /// past the end of the input buffer.
+ pub fn byte<S: AsRef<[u8]> + ?Sized>(s: &S, idx: usize) -> u8 {
+ let s = s.as_ref();
+ if idx < s.len() {
+ s[idx]
+ } else {
+ 0
+ }
+ }
+
+ fn next_chr(s: &str) -> char {
+ s.chars().next().unwrap_or('\0')
+ }
+
+ // Returns (content, suffix).
+ pub fn parse_lit_str(s: &str) -> (Box<str>, Box<str>) {
+ match byte(s, 0) {
+ b'"' => parse_lit_str_cooked(s),
+ b'r' => parse_lit_str_raw(s),
+ _ => unreachable!(),
+ }
+ }
+
+ // Clippy false positive
+ // https://github.com/rust-lang-nursery/rust-clippy/issues/2329
+ #[allow(clippy::needless_continue)]
+ fn parse_lit_str_cooked(mut s: &str) -> (Box<str>, Box<str>) {
+ assert_eq!(byte(s, 0), b'"');
+ s = &s[1..];
+
+ let mut content = String::new();
+ 'outer: loop {
+ let ch = match byte(s, 0) {
+ b'"' => break,
+ b'\\' => {
+ let b = byte(s, 1);
+ s = &s[2..];
+ match b {
+ b'x' => {
+ let (byte, rest) = backslash_x(s);
+ s = rest;
+ assert!(byte <= 0x80, "Invalid \\x byte in string literal");
+ char::from_u32(u32::from(byte)).unwrap()
+ }
+ b'u' => {
+ let (chr, rest) = backslash_u(s);
+ s = rest;
+ chr
+ }
+ b'n' => '\n',
+ b'r' => '\r',
+ b't' => '\t',
+ b'\\' => '\\',
+ b'0' => '\0',
+ b'\'' => '\'',
+ b'"' => '"',
+ b'\r' | b'\n' => loop {
+ let ch = next_chr(s);
+ if ch.is_whitespace() {
+ s = &s[ch.len_utf8()..];
+ } else {
+ continue 'outer;
+ }
+ },
+ b => panic!("unexpected byte {:?} after \\ character in byte literal", b),
+ }
+ }
+ b'\r' => {
+ assert_eq!(byte(s, 1), b'\n', "Bare CR not allowed in string");
+ s = &s[2..];
+ '\n'
+ }
+ _ => {
+ let ch = next_chr(s);
+ s = &s[ch.len_utf8()..];
+ ch
+ }
+ };
+ content.push(ch);
+ }
+
+ assert!(s.starts_with('"'));
+ let content = content.into_boxed_str();
+ let suffix = s[1..].to_owned().into_boxed_str();
+ (content, suffix)
+ }
+
+ fn parse_lit_str_raw(mut s: &str) -> (Box<str>, Box<str>) {
+ assert_eq!(byte(s, 0), b'r');
+ s = &s[1..];
+
+ let mut pounds = 0;
+ while byte(s, pounds) == b'#' {
+ pounds += 1;
+ }
+ assert_eq!(byte(s, pounds), b'"');
+ let close = s.rfind('"').unwrap();
+ for end in s[close + 1..close + 1 + pounds].bytes() {
+ assert_eq!(end, b'#');
+ }
+
+ let content = s[pounds + 1..close].to_owned().into_boxed_str();
+ let suffix = s[close + 1 + pounds..].to_owned().into_boxed_str();
+ (content, suffix)
+ }
+
+ // Returns (content, suffix).
+ pub fn parse_lit_byte_str(s: &str) -> (Vec<u8>, Box<str>) {
+ assert_eq!(byte(s, 0), b'b');
+ match byte(s, 1) {
+ b'"' => parse_lit_byte_str_cooked(s),
+ b'r' => parse_lit_byte_str_raw(s),
+ _ => unreachable!(),
+ }
+ }
+
+ // Clippy false positive
+ // https://github.com/rust-lang-nursery/rust-clippy/issues/2329
+ #[allow(clippy::needless_continue)]
+ fn parse_lit_byte_str_cooked(mut s: &str) -> (Vec<u8>, Box<str>) {
+ assert_eq!(byte(s, 0), b'b');
+ assert_eq!(byte(s, 1), b'"');
+ s = &s[2..];
+
+ // We're going to want to have slices which don't respect codepoint boundaries.
+ let mut v = s.as_bytes();
+
+ let mut out = Vec::new();
+ 'outer: loop {
+ let byte = match byte(v, 0) {
+ b'"' => break,
+ b'\\' => {
+ let b = byte(v, 1);
+ v = &v[2..];
+ match b {
+ b'x' => {
+ let (b, rest) = backslash_x(v);
+ v = rest;
+ b
+ }
+ b'n' => b'\n',
+ b'r' => b'\r',
+ b't' => b'\t',
+ b'\\' => b'\\',
+ b'0' => b'\0',
+ b'\'' => b'\'',
+ b'"' => b'"',
+ b'\r' | b'\n' => loop {
+ let byte = byte(v, 0);
+ let ch = char::from_u32(u32::from(byte)).unwrap();
+ if ch.is_whitespace() {
+ v = &v[1..];
+ } else {
+ continue 'outer;
+ }
+ },
+ b => panic!("unexpected byte {:?} after \\ character in byte literal", b),
+ }
+ }
+ b'\r' => {
+ assert_eq!(byte(v, 1), b'\n', "Bare CR not allowed in string");
+ v = &v[2..];
+ b'\n'
+ }
+ b => {
+ v = &v[1..];
+ b
+ }
+ };
+ out.push(byte);
+ }
+
+ assert_eq!(byte(v, 0), b'"');
+ let suffix = s[s.len() - v.len() + 1..].to_owned().into_boxed_str();
+ (out, suffix)
+ }
+
+ fn parse_lit_byte_str_raw(s: &str) -> (Vec<u8>, Box<str>) {
+ assert_eq!(byte(s, 0), b'b');
+ let (value, suffix) = parse_lit_str_raw(&s[1..]);
+ (String::from(value).into_bytes(), suffix)
+ }
+
+ // Returns (value, suffix).
+ pub fn parse_lit_byte(s: &str) -> (u8, Box<str>) {
+ assert_eq!(byte(s, 0), b'b');
+ assert_eq!(byte(s, 1), b'\'');
+
+ // We're going to want to have slices which don't respect codepoint boundaries.
+ let mut v = s[2..].as_bytes();
+
+ let b = match byte(v, 0) {
+ b'\\' => {
+ let b = byte(v, 1);
+ v = &v[2..];
+ match b {
+ b'x' => {
+ let (b, rest) = backslash_x(v);
+ v = rest;
+ b
+ }
+ b'n' => b'\n',
+ b'r' => b'\r',
+ b't' => b'\t',
+ b'\\' => b'\\',
+ b'0' => b'\0',
+ b'\'' => b'\'',
+ b'"' => b'"',
+ b => panic!("unexpected byte {:?} after \\ character in byte literal", b),
+ }
+ }
+ b => {
+ v = &v[1..];
+ b
+ }
+ };
+
+ assert_eq!(byte(v, 0), b'\'');
+ let suffix = s[s.len() - v.len() + 1..].to_owned().into_boxed_str();
+ (b, suffix)
+ }
+
+ // Returns (value, suffix).
+ pub fn parse_lit_char(mut s: &str) -> (char, Box<str>) {
+ assert_eq!(byte(s, 0), b'\'');
+ s = &s[1..];
+
+ let ch = match byte(s, 0) {
+ b'\\' => {
+ let b = byte(s, 1);
+ s = &s[2..];
+ match b {
+ b'x' => {
+ let (byte, rest) = backslash_x(s);
+ s = rest;
+ assert!(byte <= 0x80, "Invalid \\x byte in string literal");
+ char::from_u32(u32::from(byte)).unwrap()
+ }
+ b'u' => {
+ let (chr, rest) = backslash_u(s);
+ s = rest;
+ chr
+ }
+ b'n' => '\n',
+ b'r' => '\r',
+ b't' => '\t',
+ b'\\' => '\\',
+ b'0' => '\0',
+ b'\'' => '\'',
+ b'"' => '"',
+ b => panic!("unexpected byte {:?} after \\ character in byte literal", b),
+ }
+ }
+ _ => {
+ let ch = next_chr(s);
+ s = &s[ch.len_utf8()..];
+ ch
+ }
+ };
+ assert_eq!(byte(s, 0), b'\'');
+ let suffix = s[1..].to_owned().into_boxed_str();
+ (ch, suffix)
+ }
+
+ fn backslash_x<S>(s: &S) -> (u8, &S)
+ where
+ S: Index<RangeFrom<usize>, Output = S> + AsRef<[u8]> + ?Sized,
+ {
+ let mut ch = 0;
+ let b0 = byte(s, 0);
+ let b1 = byte(s, 1);
+ ch += 0x10
+ * match b0 {
+ b'0'..=b'9' => b0 - b'0',
+ b'a'..=b'f' => 10 + (b0 - b'a'),
+ b'A'..=b'F' => 10 + (b0 - b'A'),
+ _ => panic!("unexpected non-hex character after \\x"),
+ };
+ ch += match b1 {
+ b'0'..=b'9' => b1 - b'0',
+ b'a'..=b'f' => 10 + (b1 - b'a'),
+ b'A'..=b'F' => 10 + (b1 - b'A'),
+ _ => panic!("unexpected non-hex character after \\x"),
+ };
+ (ch, &s[2..])
+ }
+
+ fn backslash_u(mut s: &str) -> (char, &str) {
+ if byte(s, 0) != b'{' {
+ panic!("{}", "expected { after \\u");
+ }
+ s = &s[1..];
+
+ let mut ch = 0;
+ let mut digits = 0;
+ loop {
+ let b = byte(s, 0);
+ let digit = match b {
+ b'0'..=b'9' => b - b'0',
+ b'a'..=b'f' => 10 + b - b'a',
+ b'A'..=b'F' => 10 + b - b'A',
+ b'_' if digits > 0 => {
+ s = &s[1..];
+ continue;
+ }
+ b'}' if digits == 0 => panic!("invalid empty unicode escape"),
+ b'}' => break,
+ _ => panic!("unexpected non-hex character after \\u"),
+ };
+ if digits == 6 {
+ panic!("overlong unicode escape (must have at most 6 hex digits)");
+ }
+ ch *= 0x10;
+ ch += u32::from(digit);
+ digits += 1;
+ s = &s[1..];
+ }
+ assert!(byte(s, 0) == b'}');
+ s = &s[1..];
+
+ if let Some(ch) = char::from_u32(ch) {
+ (ch, s)
+ } else {
+ panic!("character code {:x} is not a valid unicode character", ch);
+ }
+ }
+
+ // Returns base 10 digits and suffix.
+ pub fn parse_lit_int(mut s: &str) -> Option<(Box<str>, Box<str>)> {
+ let negative = byte(s, 0) == b'-';
+ if negative {
+ s = &s[1..];
+ }
+
+ let base = match (byte(s, 0), byte(s, 1)) {
+ (b'0', b'x') => {
+ s = &s[2..];
+ 16
+ }
+ (b'0', b'o') => {
+ s = &s[2..];
+ 8
+ }
+ (b'0', b'b') => {
+ s = &s[2..];
+ 2
+ }
+ (b'0'..=b'9', _) => 10,
+ _ => return None,
+ };
+
+ let mut value = BigInt::new();
+ 'outer: loop {
+ let b = byte(s, 0);
+ let digit = match b {
+ b'0'..=b'9' => b - b'0',
+ b'a'..=b'f' if base > 10 => b - b'a' + 10,
+ b'A'..=b'F' if base > 10 => b - b'A' + 10,
+ b'_' => {
+ s = &s[1..];
+ continue;
+ }
+ // If looking at a floating point literal, we don't want to
+ // consider it an integer.
+ b'.' if base == 10 => return None,
+ b'e' | b'E' if base == 10 => {
+ let mut has_exp = false;
+ for (i, b) in s[1..].bytes().enumerate() {
+ match b {
+ b'_' => {}
+ b'-' | b'+' => return None,
+ b'0'..=b'9' => has_exp = true,
+ _ => {
+ let suffix = &s[1 + i..];
+ if has_exp && crate::ident::xid_ok(suffix) {
+ return None;
+ } else {
+ break 'outer;
+ }
+ }
+ }
+ }
+ if has_exp {
+ return None;
+ } else {
+ break;
+ }
+ }
+ _ => break,
+ };
+
+ if digit >= base {
+ return None;
+ }
+
+ value *= base;
+ value += digit;
+ s = &s[1..];
+ }
+
+ let suffix = s;
+ if suffix.is_empty() || crate::ident::xid_ok(suffix) {
+ let mut repr = value.to_string();
+ if negative {
+ repr.insert(0, '-');
+ }
+ Some((repr.into_boxed_str(), suffix.to_owned().into_boxed_str()))
+ } else {
+ None
+ }
+ }
+
+ // Returns base 10 digits and suffix.
+ pub fn parse_lit_float(input: &str) -> Option<(Box<str>, Box<str>)> {
+ // Rust's floating point literals are very similar to the ones parsed by
+ // the standard library, except that rust's literals can contain
+ // ignorable underscores. Let's remove those underscores.
+
+ let mut bytes = input.to_owned().into_bytes();
+
+ let start = (*bytes.first()? == b'-') as usize;
+ match bytes.get(start)? {
+ b'0'..=b'9' => {}
+ _ => return None,
+ }
+
+ let mut read = start;
+ let mut write = start;
+ let mut has_dot = false;
+ let mut has_e = false;
+ let mut has_sign = false;
+ let mut has_exponent = false;
+ while read < bytes.len() {
+ match bytes[read] {
+ b'_' => {
+ // Don't increase write
+ read += 1;
+ continue;
+ }
+ b'0'..=b'9' => {
+ if has_e {
+ has_exponent = true;
+ }
+ bytes[write] = bytes[read];
+ }
+ b'.' => {
+ if has_e || has_dot {
+ return None;
+ }
+ has_dot = true;
+ bytes[write] = b'.';
+ }
+ b'e' | b'E' => {
+ match bytes[read + 1..]
+ .iter()
+ .find(|b| **b != b'_')
+ .unwrap_or(&b'\0')
+ {
+ b'-' | b'+' | b'0'..=b'9' => {}
+ _ => break,
+ }
+ if has_e {
+ if has_exponent {
+ break;
+ } else {
+ return None;
+ }
+ }
+ has_e = true;
+ bytes[write] = b'e';
+ }
+ b'-' | b'+' => {
+ if has_sign || has_exponent || !has_e {
+ return None;
+ }
+ has_sign = true;
+ if bytes[read] == b'-' {
+ bytes[write] = bytes[read];
+ } else {
+ // Omit '+'
+ read += 1;
+ continue;
+ }
+ }
+ _ => break,
+ }
+ read += 1;
+ write += 1;
+ }
+
+ if has_e && !has_exponent {
+ return None;
+ }
+
+ let mut digits = String::from_utf8(bytes).unwrap();
+ let suffix = digits.split_off(read);
+ digits.truncate(write);
+ if suffix.is_empty() || crate::ident::xid_ok(&suffix) {
+ Some((digits.into_boxed_str(), suffix.into_boxed_str()))
+ } else {
+ None
+ }
+ }
+
+ #[allow(clippy::unnecessary_wraps)]
+ pub fn to_literal(repr: &str, digits: &str, suffix: &str) -> Option<Literal> {
+ #[cfg(syn_no_negative_literal_parse)]
+ {
+ // Rustc older than https://github.com/rust-lang/rust/pull/87262.
+ if repr.starts_with('-') {
+ let f64_parse_finite = || digits.parse().ok().filter(|x: &f64| x.is_finite());
+ let f32_parse_finite = || digits.parse().ok().filter(|x: &f32| x.is_finite());
+ return if suffix == "f64" {
+ f64_parse_finite().map(Literal::f64_suffixed)
+ } else if suffix == "f32" {
+ f32_parse_finite().map(Literal::f32_suffixed)
+ } else if suffix == "i64" {
+ digits.parse().ok().map(Literal::i64_suffixed)
+ } else if suffix == "i32" {
+ digits.parse().ok().map(Literal::i32_suffixed)
+ } else if suffix == "i16" {
+ digits.parse().ok().map(Literal::i16_suffixed)
+ } else if suffix == "i8" {
+ digits.parse().ok().map(Literal::i8_suffixed)
+ } else if !suffix.is_empty() {
+ None
+ } else if digits.contains('.') {
+ f64_parse_finite().map(Literal::f64_unsuffixed)
+ } else {
+ digits.parse().ok().map(Literal::i64_unsuffixed)
+ };
+ }
+ }
+ let _ = digits;
+ let _ = suffix;
+ Some(repr.parse::<Literal>().unwrap())
+ }
+}
diff --git a/third_party/rust/syn/src/lookahead.rs b/third_party/rust/syn/src/lookahead.rs
new file mode 100644
index 0000000000..0cf5cf5a83
--- /dev/null
+++ b/third_party/rust/syn/src/lookahead.rs
@@ -0,0 +1,169 @@
+use crate::buffer::Cursor;
+use crate::error::{self, Error};
+use crate::sealed::lookahead::Sealed;
+use crate::span::IntoSpans;
+use crate::token::Token;
+use proc_macro2::{Delimiter, Span};
+use std::cell::RefCell;
+
+/// Support for checking the next token in a stream to decide how to parse.
+///
+/// An important advantage over [`ParseStream::peek`] is that here we
+/// automatically construct an appropriate error message based on the token
+/// alternatives that get peeked. If you are producing your own error message,
+/// go ahead and use `ParseStream::peek` instead.
+///
+/// Use [`ParseStream::lookahead1`] to construct this object.
+///
+/// [`ParseStream::peek`]: crate::parse::ParseBuffer::peek
+/// [`ParseStream::lookahead1`]: crate::parse::ParseBuffer::lookahead1
+///
+/// Consuming tokens from the source stream after constructing a lookahead
+/// object does not also advance the lookahead object.
+///
+/// # Example
+///
+/// ```
+/// use syn::{ConstParam, Ident, Lifetime, LifetimeDef, Result, Token, TypeParam};
+/// use syn::parse::{Parse, ParseStream};
+///
+/// // A generic parameter, a single one of the comma-separated elements inside
+/// // angle brackets in:
+/// //
+/// // fn f<T: Clone, 'a, 'b: 'a, const N: usize>() { ... }
+/// //
+/// // On invalid input, lookahead gives us a reasonable error message.
+/// //
+/// // error: expected one of: identifier, lifetime, `const`
+/// // |
+/// // 5 | fn f<!Sized>() {}
+/// // | ^
+/// enum GenericParam {
+/// Type(TypeParam),
+/// Lifetime(LifetimeDef),
+/// Const(ConstParam),
+/// }
+///
+/// impl Parse for GenericParam {
+/// fn parse(input: ParseStream) -> Result<Self> {
+/// let lookahead = input.lookahead1();
+/// if lookahead.peek(Ident) {
+/// input.parse().map(GenericParam::Type)
+/// } else if lookahead.peek(Lifetime) {
+/// input.parse().map(GenericParam::Lifetime)
+/// } else if lookahead.peek(Token![const]) {
+/// input.parse().map(GenericParam::Const)
+/// } else {
+/// Err(lookahead.error())
+/// }
+/// }
+/// }
+/// ```
+pub struct Lookahead1<'a> {
+ scope: Span,
+ cursor: Cursor<'a>,
+ comparisons: RefCell<Vec<&'static str>>,
+}
+
+pub fn new(scope: Span, cursor: Cursor) -> Lookahead1 {
+ Lookahead1 {
+ scope,
+ cursor,
+ comparisons: RefCell::new(Vec::new()),
+ }
+}
+
+fn peek_impl(
+ lookahead: &Lookahead1,
+ peek: fn(Cursor) -> bool,
+ display: fn() -> &'static str,
+) -> bool {
+ if peek(lookahead.cursor) {
+ return true;
+ }
+ lookahead.comparisons.borrow_mut().push(display());
+ false
+}
+
+impl<'a> Lookahead1<'a> {
+ /// Looks at the next token in the parse stream to determine whether it
+ /// matches the requested type of token.
+ ///
+ /// # Syntax
+ ///
+ /// Note that this method does not use turbofish syntax. Pass the peek type
+ /// inside of parentheses.
+ ///
+ /// - `input.peek(Token![struct])`
+ /// - `input.peek(Token![==])`
+ /// - `input.peek(Ident)`&emsp;*(does not accept keywords)*
+ /// - `input.peek(Ident::peek_any)`
+ /// - `input.peek(Lifetime)`
+ /// - `input.peek(token::Brace)`
+ pub fn peek<T: Peek>(&self, token: T) -> bool {
+ let _ = token;
+ peek_impl(self, T::Token::peek, T::Token::display)
+ }
+
+ /// Triggers an error at the current position of the parse stream.
+ ///
+ /// The error message will identify all of the expected token types that
+ /// have been peeked against this lookahead instance.
+ pub fn error(self) -> Error {
+ let comparisons = self.comparisons.borrow();
+ match comparisons.len() {
+ 0 => {
+ if self.cursor.eof() {
+ Error::new(self.scope, "unexpected end of input")
+ } else {
+ Error::new(self.cursor.span(), "unexpected token")
+ }
+ }
+ 1 => {
+ let message = format!("expected {}", comparisons[0]);
+ error::new_at(self.scope, self.cursor, message)
+ }
+ 2 => {
+ let message = format!("expected {} or {}", comparisons[0], comparisons[1]);
+ error::new_at(self.scope, self.cursor, message)
+ }
+ _ => {
+ let join = comparisons.join(", ");
+ let message = format!("expected one of: {}", join);
+ error::new_at(self.scope, self.cursor, message)
+ }
+ }
+ }
+}
+
+/// Types that can be parsed by looking at just one token.
+///
+/// Use [`ParseStream::peek`] to peek one of these types in a parse stream
+/// without consuming it from the stream.
+///
+/// This trait is sealed and cannot be implemented for types outside of Syn.
+///
+/// [`ParseStream::peek`]: crate::parse::ParseBuffer::peek
+pub trait Peek: Sealed {
+ // Not public API.
+ #[doc(hidden)]
+ type Token: Token;
+}
+
+impl<F: Copy + FnOnce(TokenMarker) -> T, T: Token> Peek for F {
+ type Token = T;
+}
+
+pub enum TokenMarker {}
+
+impl<S> IntoSpans<S> for TokenMarker {
+ fn into_spans(self) -> S {
+ match self {}
+ }
+}
+
+pub fn is_delimiter(cursor: Cursor, delimiter: Delimiter) -> bool {
+ cursor.group(delimiter).is_some()
+}
+
+impl<F: Copy + FnOnce(TokenMarker) -> T, T: Token> Sealed for F {}
diff --git a/third_party/rust/syn/src/mac.rs b/third_party/rust/syn/src/mac.rs
new file mode 100644
index 0000000000..3d84f8e48b
--- /dev/null
+++ b/third_party/rust/syn/src/mac.rs
@@ -0,0 +1,219 @@
+use super::*;
+use crate::token::{Brace, Bracket, Paren};
+use proc_macro2::TokenStream;
+#[cfg(feature = "parsing")]
+use proc_macro2::{Delimiter, Group, Span, TokenTree};
+
+#[cfg(feature = "parsing")]
+use crate::parse::{Parse, ParseStream, Parser, Result};
+
+ast_struct! {
+ /// A macro invocation: `println!("{}", mac)`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Macro {
+ pub path: Path,
+ pub bang_token: Token![!],
+ pub delimiter: MacroDelimiter,
+ pub tokens: TokenStream,
+ }
+}
+
+ast_enum! {
+ /// A grouping token that surrounds a macro body: `m!(...)` or `m!{...}` or `m![...]`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum MacroDelimiter {
+ Paren(Paren),
+ Brace(Brace),
+ Bracket(Bracket),
+ }
+}
+
+#[cfg(feature = "parsing")]
+fn delimiter_span_close(macro_delimiter: &MacroDelimiter) -> Span {
+ let delimiter = match macro_delimiter {
+ MacroDelimiter::Paren(_) => Delimiter::Parenthesis,
+ MacroDelimiter::Brace(_) => Delimiter::Brace,
+ MacroDelimiter::Bracket(_) => Delimiter::Bracket,
+ };
+ let mut group = Group::new(delimiter, TokenStream::new());
+ group.set_span(match macro_delimiter {
+ MacroDelimiter::Paren(token) => token.span,
+ MacroDelimiter::Brace(token) => token.span,
+ MacroDelimiter::Bracket(token) => token.span,
+ });
+ group.span_close()
+}
+
+impl Macro {
+ /// Parse the tokens within the macro invocation's delimiters into a syntax
+ /// tree.
+ ///
+ /// This is equivalent to `syn::parse2::<T>(mac.tokens)` except that it
+ /// produces a more useful span when `tokens` is empty.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use syn::{parse_quote, Expr, ExprLit, Ident, Lit, LitStr, Macro, Token};
+ /// use syn::ext::IdentExt;
+ /// use syn::parse::{Error, Parse, ParseStream, Result};
+ /// use syn::punctuated::Punctuated;
+ ///
+ /// // The arguments expected by libcore's format_args macro, and as a
+ /// // result most other formatting and printing macros like println.
+ /// //
+ /// // println!("{} is {number:.prec$}", "x", prec=5, number=0.01)
+ /// struct FormatArgs {
+ /// format_string: Expr,
+ /// positional_args: Vec<Expr>,
+ /// named_args: Vec<(Ident, Expr)>,
+ /// }
+ ///
+ /// impl Parse for FormatArgs {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// let format_string: Expr;
+ /// let mut positional_args = Vec::new();
+ /// let mut named_args = Vec::new();
+ ///
+ /// format_string = input.parse()?;
+ /// while !input.is_empty() {
+ /// input.parse::<Token![,]>()?;
+ /// if input.is_empty() {
+ /// break;
+ /// }
+ /// if input.peek(Ident::peek_any) && input.peek2(Token![=]) {
+ /// while !input.is_empty() {
+ /// let name: Ident = input.call(Ident::parse_any)?;
+ /// input.parse::<Token![=]>()?;
+ /// let value: Expr = input.parse()?;
+ /// named_args.push((name, value));
+ /// if input.is_empty() {
+ /// break;
+ /// }
+ /// input.parse::<Token![,]>()?;
+ /// }
+ /// break;
+ /// }
+ /// positional_args.push(input.parse()?);
+ /// }
+ ///
+ /// Ok(FormatArgs {
+ /// format_string,
+ /// positional_args,
+ /// named_args,
+ /// })
+ /// }
+ /// }
+ ///
+ /// // Extract the first argument, the format string literal, from an
+ /// // invocation of a formatting or printing macro.
+ /// fn get_format_string(m: &Macro) -> Result<LitStr> {
+ /// let args: FormatArgs = m.parse_body()?;
+ /// match args.format_string {
+ /// Expr::Lit(ExprLit { lit: Lit::Str(lit), .. }) => Ok(lit),
+ /// other => {
+ /// // First argument was not a string literal expression.
+ /// // Maybe something like: println!(concat!(...), ...)
+ /// Err(Error::new_spanned(other, "format string must be a string literal"))
+ /// }
+ /// }
+ /// }
+ ///
+ /// fn main() {
+ /// let invocation = parse_quote! {
+ /// println!("{:?}", Instant::now())
+ /// };
+ /// let lit = get_format_string(&invocation).unwrap();
+ /// assert_eq!(lit.value(), "{:?}");
+ /// }
+ /// ```
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_body<T: Parse>(&self) -> Result<T> {
+ self.parse_body_with(T::parse)
+ }
+
+ /// Parse the tokens within the macro invocation's delimiters using the
+ /// given parser.
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_body_with<F: Parser>(&self, parser: F) -> Result<F::Output> {
+ let scope = delimiter_span_close(&self.delimiter);
+ crate::parse::parse_scoped(parser, scope, self.tokens.clone())
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub fn parse_delimiter(input: ParseStream) -> Result<(MacroDelimiter, TokenStream)> {
+ input.step(|cursor| {
+ if let Some((TokenTree::Group(g), rest)) = cursor.token_tree() {
+ let span = g.span();
+ let delimiter = match g.delimiter() {
+ Delimiter::Parenthesis => MacroDelimiter::Paren(Paren(span)),
+ Delimiter::Brace => MacroDelimiter::Brace(Brace(span)),
+ Delimiter::Bracket => MacroDelimiter::Bracket(Bracket(span)),
+ Delimiter::None => {
+ return Err(cursor.error("expected delimiter"));
+ }
+ };
+ Ok(((delimiter, g.stream()), rest))
+ } else {
+ Err(cursor.error("expected delimiter"))
+ }
+ })
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::parse::{Parse, ParseStream, Result};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Macro {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let tokens;
+ Ok(Macro {
+ path: input.call(Path::parse_mod_style)?,
+ bang_token: input.parse()?,
+ delimiter: {
+ let (delimiter, content) = parse_delimiter(input)?;
+ tokens = content;
+ delimiter
+ },
+ tokens,
+ })
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use proc_macro2::TokenStream;
+ use quote::ToTokens;
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Macro {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.path.to_tokens(tokens);
+ self.bang_token.to_tokens(tokens);
+ match &self.delimiter {
+ MacroDelimiter::Paren(paren) => {
+ paren.surround(tokens, |tokens| self.tokens.to_tokens(tokens));
+ }
+ MacroDelimiter::Brace(brace) => {
+ brace.surround(tokens, |tokens| self.tokens.to_tokens(tokens));
+ }
+ MacroDelimiter::Bracket(bracket) => {
+ bracket.surround(tokens, |tokens| self.tokens.to_tokens(tokens));
+ }
+ }
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/macros.rs b/third_party/rust/syn/src/macros.rs
new file mode 100644
index 0000000000..da10a1a550
--- /dev/null
+++ b/third_party/rust/syn/src/macros.rs
@@ -0,0 +1,177 @@
+#[cfg_attr(
+ not(any(feature = "full", feature = "derive")),
+ allow(unknown_lints, unused_macro_rules)
+)]
+macro_rules! ast_struct {
+ (
+ [$($attrs_pub:tt)*]
+ struct $name:ident #full $($rest:tt)*
+ ) => {
+ #[cfg(feature = "full")]
+ $($attrs_pub)* struct $name $($rest)*
+
+ #[cfg(not(feature = "full"))]
+ $($attrs_pub)* struct $name {
+ _noconstruct: ::std::marker::PhantomData<::proc_macro2::Span>,
+ }
+
+ #[cfg(all(not(feature = "full"), feature = "printing"))]
+ impl ::quote::ToTokens for $name {
+ fn to_tokens(&self, _: &mut ::proc_macro2::TokenStream) {
+ unreachable!()
+ }
+ }
+ };
+
+ (
+ [$($attrs_pub:tt)*]
+ struct $name:ident $($rest:tt)*
+ ) => {
+ $($attrs_pub)* struct $name $($rest)*
+ };
+
+ ($($t:tt)*) => {
+ strip_attrs_pub!(ast_struct!($($t)*));
+ };
+}
+
+macro_rules! ast_enum {
+ // Drop the `#no_visit` attribute, if present.
+ (
+ [$($attrs_pub:tt)*]
+ enum $name:ident #no_visit $($rest:tt)*
+ ) => (
+ ast_enum!([$($attrs_pub)*] enum $name $($rest)*);
+ );
+
+ (
+ [$($attrs_pub:tt)*]
+ enum $name:ident $($rest:tt)*
+ ) => (
+ $($attrs_pub)* enum $name $($rest)*
+ );
+
+ ($($t:tt)*) => {
+ strip_attrs_pub!(ast_enum!($($t)*));
+ };
+}
+
+macro_rules! ast_enum_of_structs {
+ (
+ $(#[$enum_attr:meta])*
+ $pub:ident $enum:ident $name:ident $body:tt
+ $($remaining:tt)*
+ ) => {
+ ast_enum!($(#[$enum_attr])* $pub $enum $name $body);
+ ast_enum_of_structs_impl!($pub $enum $name $body $($remaining)*);
+ };
+}
+
+macro_rules! ast_enum_of_structs_impl {
+ (
+ $pub:ident $enum:ident $name:ident {
+ $(
+ $(#[cfg $cfg_attr:tt])*
+ $(#[doc $($doc_attr:tt)*])*
+ $variant:ident $( ($($member:ident)::+) )*,
+ )*
+ }
+
+ $($remaining:tt)*
+ ) => {
+ check_keyword_matches!(pub $pub);
+ check_keyword_matches!(enum $enum);
+
+ $($(
+ ast_enum_from_struct!($name::$variant, $($member)::+);
+ )*)*
+
+ #[cfg(feature = "printing")]
+ generate_to_tokens! {
+ $($remaining)*
+ ()
+ tokens
+ $name {
+ $(
+ $(#[cfg $cfg_attr])*
+ $(#[doc $($doc_attr)*])*
+ $variant $($($member)::+)*,
+ )*
+ }
+ }
+ };
+}
+
+macro_rules! ast_enum_from_struct {
+ // No From<TokenStream> for verbatim variants.
+ ($name:ident::Verbatim, $member:ident) => {};
+
+ ($name:ident::$variant:ident, $member:ident) => {
+ impl From<$member> for $name {
+ fn from(e: $member) -> $name {
+ $name::$variant(e)
+ }
+ }
+ };
+}
+
+#[cfg(feature = "printing")]
+#[cfg_attr(
+ not(any(feature = "full", feature = "derive")),
+ allow(unknown_lints, unused_macro_rules)
+)]
+macro_rules! generate_to_tokens {
+ (do_not_generate_to_tokens $($foo:tt)*) => ();
+
+ (
+ ($($arms:tt)*) $tokens:ident $name:ident {
+ $(#[cfg $cfg_attr:tt])*
+ $(#[doc $($doc_attr:tt)*])*
+ $variant:ident,
+ $($next:tt)*
+ }
+ ) => {
+ generate_to_tokens!(
+ ($($arms)* $(#[cfg $cfg_attr])* $name::$variant => {})
+ $tokens $name { $($next)* }
+ );
+ };
+
+ (
+ ($($arms:tt)*) $tokens:ident $name:ident {
+ $(#[cfg $cfg_attr:tt])*
+ $(#[doc $($doc_attr:tt)*])*
+ $variant:ident $member:ident,
+ $($next:tt)*
+ }
+ ) => {
+ generate_to_tokens!(
+ ($($arms)* $(#[cfg $cfg_attr])* $name::$variant(_e) => _e.to_tokens($tokens),)
+ $tokens $name { $($next)* }
+ );
+ };
+
+ (($($arms:tt)*) $tokens:ident $name:ident {}) => {
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ::quote::ToTokens for $name {
+ fn to_tokens(&self, $tokens: &mut ::proc_macro2::TokenStream) {
+ match self {
+ $($arms)*
+ }
+ }
+ }
+ };
+}
+
+macro_rules! strip_attrs_pub {
+ ($mac:ident!($(#[$m:meta])* $pub:ident $($t:tt)*)) => {
+ check_keyword_matches!(pub $pub);
+
+ $mac!([$(#[$m])* $pub] $($t)*);
+ };
+}
+
+macro_rules! check_keyword_matches {
+ (enum enum) => {};
+ (pub pub) => {};
+}
diff --git a/third_party/rust/syn/src/op.rs b/third_party/rust/syn/src/op.rs
new file mode 100644
index 0000000000..b8ef9a7fbd
--- /dev/null
+++ b/third_party/rust/syn/src/op.rs
@@ -0,0 +1,234 @@
+ast_enum! {
+ /// A binary operator: `+`, `+=`, `&`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum BinOp {
+ /// The `+` operator (addition)
+ Add(Token![+]),
+ /// The `-` operator (subtraction)
+ Sub(Token![-]),
+ /// The `*` operator (multiplication)
+ Mul(Token![*]),
+ /// The `/` operator (division)
+ Div(Token![/]),
+ /// The `%` operator (modulus)
+ Rem(Token![%]),
+ /// The `&&` operator (logical and)
+ And(Token![&&]),
+ /// The `||` operator (logical or)
+ Or(Token![||]),
+ /// The `^` operator (bitwise xor)
+ BitXor(Token![^]),
+ /// The `&` operator (bitwise and)
+ BitAnd(Token![&]),
+ /// The `|` operator (bitwise or)
+ BitOr(Token![|]),
+ /// The `<<` operator (shift left)
+ Shl(Token![<<]),
+ /// The `>>` operator (shift right)
+ Shr(Token![>>]),
+ /// The `==` operator (equality)
+ Eq(Token![==]),
+ /// The `<` operator (less than)
+ Lt(Token![<]),
+ /// The `<=` operator (less than or equal to)
+ Le(Token![<=]),
+ /// The `!=` operator (not equal to)
+ Ne(Token![!=]),
+ /// The `>=` operator (greater than or equal to)
+ Ge(Token![>=]),
+ /// The `>` operator (greater than)
+ Gt(Token![>]),
+ /// The `+=` operator
+ AddEq(Token![+=]),
+ /// The `-=` operator
+ SubEq(Token![-=]),
+ /// The `*=` operator
+ MulEq(Token![*=]),
+ /// The `/=` operator
+ DivEq(Token![/=]),
+ /// The `%=` operator
+ RemEq(Token![%=]),
+ /// The `^=` operator
+ BitXorEq(Token![^=]),
+ /// The `&=` operator
+ BitAndEq(Token![&=]),
+ /// The `|=` operator
+ BitOrEq(Token![|=]),
+ /// The `<<=` operator
+ ShlEq(Token![<<=]),
+ /// The `>>=` operator
+ ShrEq(Token![>>=]),
+ }
+}
+
+ast_enum! {
+ /// A unary operator: `*`, `!`, `-`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum UnOp {
+ /// The `*` operator for dereferencing
+ Deref(Token![*]),
+ /// The `!` operator for logical inversion
+ Not(Token![!]),
+ /// The `-` operator for negation
+ Neg(Token![-]),
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::parse::{Parse, ParseStream, Result};
+
+ fn parse_binop(input: ParseStream) -> Result<BinOp> {
+ if input.peek(Token![&&]) {
+ input.parse().map(BinOp::And)
+ } else if input.peek(Token![||]) {
+ input.parse().map(BinOp::Or)
+ } else if input.peek(Token![<<]) {
+ input.parse().map(BinOp::Shl)
+ } else if input.peek(Token![>>]) {
+ input.parse().map(BinOp::Shr)
+ } else if input.peek(Token![==]) {
+ input.parse().map(BinOp::Eq)
+ } else if input.peek(Token![<=]) {
+ input.parse().map(BinOp::Le)
+ } else if input.peek(Token![!=]) {
+ input.parse().map(BinOp::Ne)
+ } else if input.peek(Token![>=]) {
+ input.parse().map(BinOp::Ge)
+ } else if input.peek(Token![+]) {
+ input.parse().map(BinOp::Add)
+ } else if input.peek(Token![-]) {
+ input.parse().map(BinOp::Sub)
+ } else if input.peek(Token![*]) {
+ input.parse().map(BinOp::Mul)
+ } else if input.peek(Token![/]) {
+ input.parse().map(BinOp::Div)
+ } else if input.peek(Token![%]) {
+ input.parse().map(BinOp::Rem)
+ } else if input.peek(Token![^]) {
+ input.parse().map(BinOp::BitXor)
+ } else if input.peek(Token![&]) {
+ input.parse().map(BinOp::BitAnd)
+ } else if input.peek(Token![|]) {
+ input.parse().map(BinOp::BitOr)
+ } else if input.peek(Token![<]) {
+ input.parse().map(BinOp::Lt)
+ } else if input.peek(Token![>]) {
+ input.parse().map(BinOp::Gt)
+ } else {
+ Err(input.error("expected binary operator"))
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for BinOp {
+ #[cfg(not(feature = "full"))]
+ fn parse(input: ParseStream) -> Result<Self> {
+ parse_binop(input)
+ }
+
+ #[cfg(feature = "full")]
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Token![+=]) {
+ input.parse().map(BinOp::AddEq)
+ } else if input.peek(Token![-=]) {
+ input.parse().map(BinOp::SubEq)
+ } else if input.peek(Token![*=]) {
+ input.parse().map(BinOp::MulEq)
+ } else if input.peek(Token![/=]) {
+ input.parse().map(BinOp::DivEq)
+ } else if input.peek(Token![%=]) {
+ input.parse().map(BinOp::RemEq)
+ } else if input.peek(Token![^=]) {
+ input.parse().map(BinOp::BitXorEq)
+ } else if input.peek(Token![&=]) {
+ input.parse().map(BinOp::BitAndEq)
+ } else if input.peek(Token![|=]) {
+ input.parse().map(BinOp::BitOrEq)
+ } else if input.peek(Token![<<=]) {
+ input.parse().map(BinOp::ShlEq)
+ } else if input.peek(Token![>>=]) {
+ input.parse().map(BinOp::ShrEq)
+ } else {
+ parse_binop(input)
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for UnOp {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let lookahead = input.lookahead1();
+ if lookahead.peek(Token![*]) {
+ input.parse().map(UnOp::Deref)
+ } else if lookahead.peek(Token![!]) {
+ input.parse().map(UnOp::Not)
+ } else if lookahead.peek(Token![-]) {
+ input.parse().map(UnOp::Neg)
+ } else {
+ Err(lookahead.error())
+ }
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use proc_macro2::TokenStream;
+ use quote::ToTokens;
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for BinOp {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ BinOp::Add(t) => t.to_tokens(tokens),
+ BinOp::Sub(t) => t.to_tokens(tokens),
+ BinOp::Mul(t) => t.to_tokens(tokens),
+ BinOp::Div(t) => t.to_tokens(tokens),
+ BinOp::Rem(t) => t.to_tokens(tokens),
+ BinOp::And(t) => t.to_tokens(tokens),
+ BinOp::Or(t) => t.to_tokens(tokens),
+ BinOp::BitXor(t) => t.to_tokens(tokens),
+ BinOp::BitAnd(t) => t.to_tokens(tokens),
+ BinOp::BitOr(t) => t.to_tokens(tokens),
+ BinOp::Shl(t) => t.to_tokens(tokens),
+ BinOp::Shr(t) => t.to_tokens(tokens),
+ BinOp::Eq(t) => t.to_tokens(tokens),
+ BinOp::Lt(t) => t.to_tokens(tokens),
+ BinOp::Le(t) => t.to_tokens(tokens),
+ BinOp::Ne(t) => t.to_tokens(tokens),
+ BinOp::Ge(t) => t.to_tokens(tokens),
+ BinOp::Gt(t) => t.to_tokens(tokens),
+ BinOp::AddEq(t) => t.to_tokens(tokens),
+ BinOp::SubEq(t) => t.to_tokens(tokens),
+ BinOp::MulEq(t) => t.to_tokens(tokens),
+ BinOp::DivEq(t) => t.to_tokens(tokens),
+ BinOp::RemEq(t) => t.to_tokens(tokens),
+ BinOp::BitXorEq(t) => t.to_tokens(tokens),
+ BinOp::BitAndEq(t) => t.to_tokens(tokens),
+ BinOp::BitOrEq(t) => t.to_tokens(tokens),
+ BinOp::ShlEq(t) => t.to_tokens(tokens),
+ BinOp::ShrEq(t) => t.to_tokens(tokens),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for UnOp {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ UnOp::Deref(t) => t.to_tokens(tokens),
+ UnOp::Not(t) => t.to_tokens(tokens),
+ UnOp::Neg(t) => t.to_tokens(tokens),
+ }
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/parse.rs b/third_party/rust/syn/src/parse.rs
new file mode 100644
index 0000000000..bac4ca05ab
--- /dev/null
+++ b/third_party/rust/syn/src/parse.rs
@@ -0,0 +1,1314 @@
+//! Parsing interface for parsing a token stream into a syntax tree node.
+//!
+//! Parsing in Syn is built on parser functions that take in a [`ParseStream`]
+//! and produce a [`Result<T>`] where `T` is some syntax tree node. Underlying
+//! these parser functions is a lower level mechanism built around the
+//! [`Cursor`] type. `Cursor` is a cheaply copyable cursor over a range of
+//! tokens in a token stream.
+//!
+//! [`Result<T>`]: Result
+//! [`Cursor`]: crate::buffer::Cursor
+//!
+//! # Example
+//!
+//! Here is a snippet of parsing code to get a feel for the style of the
+//! library. We define data structures for a subset of Rust syntax including
+//! enums (not shown) and structs, then provide implementations of the [`Parse`]
+//! trait to parse these syntax tree data structures from a token stream.
+//!
+//! Once `Parse` impls have been defined, they can be called conveniently from a
+//! procedural macro through [`parse_macro_input!`] as shown at the bottom of
+//! the snippet. If the caller provides syntactically invalid input to the
+//! procedural macro, they will receive a helpful compiler error message
+//! pointing out the exact token that triggered the failure to parse.
+//!
+//! [`parse_macro_input!`]: crate::parse_macro_input!
+//!
+//! ```
+//! # extern crate proc_macro;
+//! #
+//! use proc_macro::TokenStream;
+//! use syn::{braced, parse_macro_input, token, Field, Ident, Result, Token};
+//! use syn::parse::{Parse, ParseStream};
+//! use syn::punctuated::Punctuated;
+//!
+//! enum Item {
+//! Struct(ItemStruct),
+//! Enum(ItemEnum),
+//! }
+//!
+//! struct ItemStruct {
+//! struct_token: Token![struct],
+//! ident: Ident,
+//! brace_token: token::Brace,
+//! fields: Punctuated<Field, Token![,]>,
+//! }
+//! #
+//! # enum ItemEnum {}
+//!
+//! impl Parse for Item {
+//! fn parse(input: ParseStream) -> Result<Self> {
+//! let lookahead = input.lookahead1();
+//! if lookahead.peek(Token![struct]) {
+//! input.parse().map(Item::Struct)
+//! } else if lookahead.peek(Token![enum]) {
+//! input.parse().map(Item::Enum)
+//! } else {
+//! Err(lookahead.error())
+//! }
+//! }
+//! }
+//!
+//! impl Parse for ItemStruct {
+//! fn parse(input: ParseStream) -> Result<Self> {
+//! let content;
+//! Ok(ItemStruct {
+//! struct_token: input.parse()?,
+//! ident: input.parse()?,
+//! brace_token: braced!(content in input),
+//! fields: content.parse_terminated(Field::parse_named)?,
+//! })
+//! }
+//! }
+//! #
+//! # impl Parse for ItemEnum {
+//! # fn parse(input: ParseStream) -> Result<Self> {
+//! # unimplemented!()
+//! # }
+//! # }
+//!
+//! # const IGNORE: &str = stringify! {
+//! #[proc_macro]
+//! # };
+//! pub fn my_macro(tokens: TokenStream) -> TokenStream {
+//! let input = parse_macro_input!(tokens as Item);
+//!
+//! /* ... */
+//! # "".parse().unwrap()
+//! }
+//! ```
+//!
+//! # The `syn::parse*` functions
+//!
+//! The [`syn::parse`], [`syn::parse2`], and [`syn::parse_str`] functions serve
+//! as an entry point for parsing syntax tree nodes that can be parsed in an
+//! obvious default way. These functions can return any syntax tree node that
+//! implements the [`Parse`] trait, which includes most types in Syn.
+//!
+//! [`syn::parse`]: crate::parse()
+//! [`syn::parse2`]: crate::parse2()
+//! [`syn::parse_str`]: crate::parse_str()
+//!
+//! ```
+//! use syn::Type;
+//!
+//! # fn run_parser() -> syn::Result<()> {
+//! let t: Type = syn::parse_str("std::collections::HashMap<String, Value>")?;
+//! # Ok(())
+//! # }
+//! #
+//! # run_parser().unwrap();
+//! ```
+//!
+//! The [`parse_quote!`] macro also uses this approach.
+//!
+//! [`parse_quote!`]: crate::parse_quote!
+//!
+//! # The `Parser` trait
+//!
+//! Some types can be parsed in several ways depending on context. For example
+//! an [`Attribute`] can be either "outer" like `#[...]` or "inner" like
+//! `#![...]` and parsing the wrong one would be a bug. Similarly [`Punctuated`]
+//! may or may not allow trailing punctuation, and parsing it the wrong way
+//! would either reject valid input or accept invalid input.
+//!
+//! [`Attribute`]: crate::Attribute
+//! [`Punctuated`]: crate::punctuated
+//!
+//! The `Parse` trait is not implemented in these cases because there is no good
+//! behavior to consider the default.
+//!
+//! ```compile_fail
+//! # extern crate proc_macro;
+//! #
+//! # use syn::punctuated::Punctuated;
+//! # use syn::{PathSegment, Result, Token};
+//! #
+//! # fn f(tokens: proc_macro::TokenStream) -> Result<()> {
+//! #
+//! // Can't parse `Punctuated` without knowing whether trailing punctuation
+//! // should be allowed in this context.
+//! let path: Punctuated<PathSegment, Token![::]> = syn::parse(tokens)?;
+//! #
+//! # Ok(())
+//! # }
+//! ```
+//!
+//! In these cases the types provide a choice of parser functions rather than a
+//! single `Parse` implementation, and those parser functions can be invoked
+//! through the [`Parser`] trait.
+//!
+//!
+//! ```
+//! # extern crate proc_macro;
+//! #
+//! use proc_macro::TokenStream;
+//! use syn::parse::Parser;
+//! use syn::punctuated::Punctuated;
+//! use syn::{Attribute, Expr, PathSegment, Result, Token};
+//!
+//! fn call_some_parser_methods(input: TokenStream) -> Result<()> {
+//! // Parse a nonempty sequence of path segments separated by `::` punctuation
+//! // with no trailing punctuation.
+//! let tokens = input.clone();
+//! let parser = Punctuated::<PathSegment, Token![::]>::parse_separated_nonempty;
+//! let _path = parser.parse(tokens)?;
+//!
+//! // Parse a possibly empty sequence of expressions terminated by commas with
+//! // an optional trailing punctuation.
+//! let tokens = input.clone();
+//! let parser = Punctuated::<Expr, Token![,]>::parse_terminated;
+//! let _args = parser.parse(tokens)?;
+//!
+//! // Parse zero or more outer attributes but not inner attributes.
+//! let tokens = input.clone();
+//! let parser = Attribute::parse_outer;
+//! let _attrs = parser.parse(tokens)?;
+//!
+//! Ok(())
+//! }
+//! ```
+//!
+//! ---
+//!
+//! *This module is available only if Syn is built with the `"parsing"` feature.*
+
+#[path = "discouraged.rs"]
+pub mod discouraged;
+
+use crate::buffer::{Cursor, TokenBuffer};
+use crate::error;
+use crate::lookahead;
+#[cfg(all(
+ not(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "wasi"))),
+ feature = "proc-macro"
+))]
+use crate::proc_macro;
+use crate::punctuated::Punctuated;
+use crate::token::Token;
+use proc_macro2::{self, Delimiter, Group, Literal, Punct, Span, TokenStream, TokenTree};
+use std::cell::Cell;
+use std::fmt::{self, Debug, Display};
+#[cfg(feature = "extra-traits")]
+use std::hash::{Hash, Hasher};
+use std::marker::PhantomData;
+use std::mem;
+use std::ops::Deref;
+use std::rc::Rc;
+use std::str::FromStr;
+
+pub use crate::error::{Error, Result};
+pub use crate::lookahead::{Lookahead1, Peek};
+
+/// Parsing interface implemented by all types that can be parsed in a default
+/// way from a token stream.
+///
+/// Refer to the [module documentation] for details about implementing and using
+/// the `Parse` trait.
+///
+/// [module documentation]: self
+pub trait Parse: Sized {
+ fn parse(input: ParseStream) -> Result<Self>;
+}
+
+/// Input to a Syn parser function.
+///
+/// See the methods of this type under the documentation of [`ParseBuffer`]. For
+/// an overview of parsing in Syn, refer to the [module documentation].
+///
+/// [module documentation]: self
+pub type ParseStream<'a> = &'a ParseBuffer<'a>;
+
+/// Cursor position within a buffered token stream.
+///
+/// This type is more commonly used through the type alias [`ParseStream`] which
+/// is an alias for `&ParseBuffer`.
+///
+/// `ParseStream` is the input type for all parser functions in Syn. They have
+/// the signature `fn(ParseStream) -> Result<T>`.
+///
+/// ## Calling a parser function
+///
+/// There is no public way to construct a `ParseBuffer`. Instead, if you are
+/// looking to invoke a parser function that requires `ParseStream` as input,
+/// you will need to go through one of the public parsing entry points.
+///
+/// - The [`parse_macro_input!`] macro if parsing input of a procedural macro;
+/// - One of [the `syn::parse*` functions][syn-parse]; or
+/// - A method of the [`Parser`] trait.
+///
+/// [`parse_macro_input!`]: crate::parse_macro_input!
+/// [syn-parse]: self#the-synparse-functions
+pub struct ParseBuffer<'a> {
+ scope: Span,
+ // Instead of Cell<Cursor<'a>> so that ParseBuffer<'a> is covariant in 'a.
+ // The rest of the code in this module needs to be careful that only a
+ // cursor derived from this `cell` is ever assigned to this `cell`.
+ //
+ // Cell<Cursor<'a>> cannot be covariant in 'a because then we could take a
+ // ParseBuffer<'a>, upcast to ParseBuffer<'short> for some lifetime shorter
+ // than 'a, and then assign a Cursor<'short> into the Cell.
+ //
+ // By extension, it would not be safe to expose an API that accepts a
+ // Cursor<'a> and trusts that it lives as long as the cursor currently in
+ // the cell.
+ cell: Cell<Cursor<'static>>,
+ marker: PhantomData<Cursor<'a>>,
+ unexpected: Cell<Option<Rc<Cell<Unexpected>>>>,
+}
+
+impl<'a> Drop for ParseBuffer<'a> {
+ fn drop(&mut self) {
+ if let Some(unexpected_span) = span_of_unexpected_ignoring_nones(self.cursor()) {
+ let (inner, old_span) = inner_unexpected(self);
+ if old_span.is_none() {
+ inner.set(Unexpected::Some(unexpected_span));
+ }
+ }
+ }
+}
+
+impl<'a> Display for ParseBuffer<'a> {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ Display::fmt(&self.cursor().token_stream(), f)
+ }
+}
+
+impl<'a> Debug for ParseBuffer<'a> {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ Debug::fmt(&self.cursor().token_stream(), f)
+ }
+}
+
+/// Cursor state associated with speculative parsing.
+///
+/// This type is the input of the closure provided to [`ParseStream::step`].
+///
+/// [`ParseStream::step`]: ParseBuffer::step
+///
+/// # Example
+///
+/// ```
+/// use proc_macro2::TokenTree;
+/// use syn::Result;
+/// use syn::parse::ParseStream;
+///
+/// // This function advances the stream past the next occurrence of `@`. If
+/// // no `@` is present in the stream, the stream position is unchanged and
+/// // an error is returned.
+/// fn skip_past_next_at(input: ParseStream) -> Result<()> {
+/// input.step(|cursor| {
+/// let mut rest = *cursor;
+/// while let Some((tt, next)) = rest.token_tree() {
+/// match &tt {
+/// TokenTree::Punct(punct) if punct.as_char() == '@' => {
+/// return Ok(((), next));
+/// }
+/// _ => rest = next,
+/// }
+/// }
+/// Err(cursor.error("no `@` was found after this point"))
+/// })
+/// }
+/// #
+/// # fn remainder_after_skipping_past_next_at(
+/// # input: ParseStream,
+/// # ) -> Result<proc_macro2::TokenStream> {
+/// # skip_past_next_at(input)?;
+/// # input.parse()
+/// # }
+/// #
+/// # use syn::parse::Parser;
+/// # let remainder = remainder_after_skipping_past_next_at
+/// # .parse_str("a @ b c")
+/// # .unwrap();
+/// # assert_eq!(remainder.to_string(), "b c");
+/// ```
+pub struct StepCursor<'c, 'a> {
+ scope: Span,
+ // This field is covariant in 'c.
+ cursor: Cursor<'c>,
+ // This field is contravariant in 'c. Together these make StepCursor
+ // invariant in 'c. Also covariant in 'a. The user cannot cast 'c to a
+ // different lifetime but can upcast into a StepCursor with a shorter
+ // lifetime 'a.
+ //
+ // As long as we only ever construct a StepCursor for which 'c outlives 'a,
+ // this means if ever a StepCursor<'c, 'a> exists we are guaranteed that 'c
+ // outlives 'a.
+ marker: PhantomData<fn(Cursor<'c>) -> Cursor<'a>>,
+}
+
+impl<'c, 'a> Deref for StepCursor<'c, 'a> {
+ type Target = Cursor<'c>;
+
+ fn deref(&self) -> &Self::Target {
+ &self.cursor
+ }
+}
+
+impl<'c, 'a> Copy for StepCursor<'c, 'a> {}
+
+impl<'c, 'a> Clone for StepCursor<'c, 'a> {
+ fn clone(&self) -> Self {
+ *self
+ }
+}
+
+impl<'c, 'a> StepCursor<'c, 'a> {
+ /// Triggers an error at the current position of the parse stream.
+ ///
+ /// The `ParseStream::step` invocation will return this same error without
+ /// advancing the stream state.
+ pub fn error<T: Display>(self, message: T) -> Error {
+ error::new_at(self.scope, self.cursor, message)
+ }
+}
+
+pub(crate) fn advance_step_cursor<'c, 'a>(proof: StepCursor<'c, 'a>, to: Cursor<'c>) -> Cursor<'a> {
+ // Refer to the comments within the StepCursor definition. We use the
+ // fact that a StepCursor<'c, 'a> exists as proof that 'c outlives 'a.
+ // Cursor is covariant in its lifetime parameter so we can cast a
+ // Cursor<'c> to one with the shorter lifetime Cursor<'a>.
+ let _ = proof;
+ unsafe { mem::transmute::<Cursor<'c>, Cursor<'a>>(to) }
+}
+
+pub(crate) fn new_parse_buffer(
+ scope: Span,
+ cursor: Cursor,
+ unexpected: Rc<Cell<Unexpected>>,
+) -> ParseBuffer {
+ ParseBuffer {
+ scope,
+ // See comment on `cell` in the struct definition.
+ cell: Cell::new(unsafe { mem::transmute::<Cursor, Cursor<'static>>(cursor) }),
+ marker: PhantomData,
+ unexpected: Cell::new(Some(unexpected)),
+ }
+}
+
+pub(crate) enum Unexpected {
+ None,
+ Some(Span),
+ Chain(Rc<Cell<Unexpected>>),
+}
+
+impl Default for Unexpected {
+ fn default() -> Self {
+ Unexpected::None
+ }
+}
+
+impl Clone for Unexpected {
+ fn clone(&self) -> Self {
+ match self {
+ Unexpected::None => Unexpected::None,
+ Unexpected::Some(span) => Unexpected::Some(*span),
+ Unexpected::Chain(next) => Unexpected::Chain(next.clone()),
+ }
+ }
+}
+
+// We call this on Cell<Unexpected> and Cell<Option<T>> where temporarily
+// swapping in a None is cheap.
+fn cell_clone<T: Default + Clone>(cell: &Cell<T>) -> T {
+ let prev = cell.take();
+ let ret = prev.clone();
+ cell.set(prev);
+ ret
+}
+
+fn inner_unexpected(buffer: &ParseBuffer) -> (Rc<Cell<Unexpected>>, Option<Span>) {
+ let mut unexpected = get_unexpected(buffer);
+ loop {
+ match cell_clone(&unexpected) {
+ Unexpected::None => return (unexpected, None),
+ Unexpected::Some(span) => return (unexpected, Some(span)),
+ Unexpected::Chain(next) => unexpected = next,
+ }
+ }
+}
+
+pub(crate) fn get_unexpected(buffer: &ParseBuffer) -> Rc<Cell<Unexpected>> {
+ cell_clone(&buffer.unexpected).unwrap()
+}
+
+fn span_of_unexpected_ignoring_nones(mut cursor: Cursor) -> Option<Span> {
+ if cursor.eof() {
+ return None;
+ }
+ while let Some((inner, _span, rest)) = cursor.group(Delimiter::None) {
+ if let Some(unexpected) = span_of_unexpected_ignoring_nones(inner) {
+ return Some(unexpected);
+ }
+ cursor = rest;
+ }
+ if cursor.eof() {
+ None
+ } else {
+ Some(cursor.span())
+ }
+}
+
+impl<'a> ParseBuffer<'a> {
+ /// Parses a syntax tree node of type `T`, advancing the position of our
+ /// parse stream past it.
+ pub fn parse<T: Parse>(&self) -> Result<T> {
+ T::parse(self)
+ }
+
+ /// Calls the given parser function to parse a syntax tree node of type `T`
+ /// from this stream.
+ ///
+ /// # Example
+ ///
+ /// The parser below invokes [`Attribute::parse_outer`] to parse a vector of
+ /// zero or more outer attributes.
+ ///
+ /// [`Attribute::parse_outer`]: crate::Attribute::parse_outer
+ ///
+ /// ```
+ /// use syn::{Attribute, Ident, Result, Token};
+ /// use syn::parse::{Parse, ParseStream};
+ ///
+ /// // Parses a unit struct with attributes.
+ /// //
+ /// // #[path = "s.tmpl"]
+ /// // struct S;
+ /// struct UnitStruct {
+ /// attrs: Vec<Attribute>,
+ /// struct_token: Token![struct],
+ /// name: Ident,
+ /// semi_token: Token![;],
+ /// }
+ ///
+ /// impl Parse for UnitStruct {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// Ok(UnitStruct {
+ /// attrs: input.call(Attribute::parse_outer)?,
+ /// struct_token: input.parse()?,
+ /// name: input.parse()?,
+ /// semi_token: input.parse()?,
+ /// })
+ /// }
+ /// }
+ /// ```
+ pub fn call<T>(&self, function: fn(ParseStream) -> Result<T>) -> Result<T> {
+ function(self)
+ }
+
+ /// Looks at the next token in the parse stream to determine whether it
+ /// matches the requested type of token.
+ ///
+ /// Does not advance the position of the parse stream.
+ ///
+ /// # Syntax
+ ///
+ /// Note that this method does not use turbofish syntax. Pass the peek type
+ /// inside of parentheses.
+ ///
+ /// - `input.peek(Token![struct])`
+ /// - `input.peek(Token![==])`
+ /// - `input.peek(Ident)`&emsp;*(does not accept keywords)*
+ /// - `input.peek(Ident::peek_any)`
+ /// - `input.peek(Lifetime)`
+ /// - `input.peek(token::Brace)`
+ ///
+ /// # Example
+ ///
+ /// In this example we finish parsing the list of supertraits when the next
+ /// token in the input is either `where` or an opening curly brace.
+ ///
+ /// ```
+ /// use syn::{braced, token, Generics, Ident, Result, Token, TypeParamBound};
+ /// use syn::parse::{Parse, ParseStream};
+ /// use syn::punctuated::Punctuated;
+ ///
+ /// // Parses a trait definition containing no associated items.
+ /// //
+ /// // trait Marker<'de, T>: A + B<'de> where Box<T>: Clone {}
+ /// struct MarkerTrait {
+ /// trait_token: Token![trait],
+ /// ident: Ident,
+ /// generics: Generics,
+ /// colon_token: Option<Token![:]>,
+ /// supertraits: Punctuated<TypeParamBound, Token![+]>,
+ /// brace_token: token::Brace,
+ /// }
+ ///
+ /// impl Parse for MarkerTrait {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// let trait_token: Token![trait] = input.parse()?;
+ /// let ident: Ident = input.parse()?;
+ /// let mut generics: Generics = input.parse()?;
+ /// let colon_token: Option<Token![:]> = input.parse()?;
+ ///
+ /// let mut supertraits = Punctuated::new();
+ /// if colon_token.is_some() {
+ /// loop {
+ /// supertraits.push_value(input.parse()?);
+ /// if input.peek(Token![where]) || input.peek(token::Brace) {
+ /// break;
+ /// }
+ /// supertraits.push_punct(input.parse()?);
+ /// }
+ /// }
+ ///
+ /// generics.where_clause = input.parse()?;
+ /// let content;
+ /// let empty_brace_token = braced!(content in input);
+ ///
+ /// Ok(MarkerTrait {
+ /// trait_token,
+ /// ident,
+ /// generics,
+ /// colon_token,
+ /// supertraits,
+ /// brace_token: empty_brace_token,
+ /// })
+ /// }
+ /// }
+ /// ```
+ pub fn peek<T: Peek>(&self, token: T) -> bool {
+ let _ = token;
+ T::Token::peek(self.cursor())
+ }
+
+ /// Looks at the second-next token in the parse stream.
+ ///
+ /// This is commonly useful as a way to implement contextual keywords.
+ ///
+ /// # Example
+ ///
+ /// This example needs to use `peek2` because the symbol `union` is not a
+ /// keyword in Rust. We can't use just `peek` and decide to parse a union if
+ /// the very next token is `union`, because someone is free to write a `mod
+ /// union` and a macro invocation that looks like `union::some_macro! { ...
+ /// }`. In other words `union` is a contextual keyword.
+ ///
+ /// ```
+ /// use syn::{Ident, ItemUnion, Macro, Result, Token};
+ /// use syn::parse::{Parse, ParseStream};
+ ///
+ /// // Parses either a union or a macro invocation.
+ /// enum UnionOrMacro {
+ /// // union MaybeUninit<T> { uninit: (), value: T }
+ /// Union(ItemUnion),
+ /// // lazy_static! { ... }
+ /// Macro(Macro),
+ /// }
+ ///
+ /// impl Parse for UnionOrMacro {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// if input.peek(Token![union]) && input.peek2(Ident) {
+ /// input.parse().map(UnionOrMacro::Union)
+ /// } else {
+ /// input.parse().map(UnionOrMacro::Macro)
+ /// }
+ /// }
+ /// }
+ /// ```
+ pub fn peek2<T: Peek>(&self, token: T) -> bool {
+ fn peek2(buffer: &ParseBuffer, peek: fn(Cursor) -> bool) -> bool {
+ if let Some(group) = buffer.cursor().group(Delimiter::None) {
+ if group.0.skip().map_or(false, peek) {
+ return true;
+ }
+ }
+ buffer.cursor().skip().map_or(false, peek)
+ }
+
+ let _ = token;
+ peek2(self, T::Token::peek)
+ }
+
+ /// Looks at the third-next token in the parse stream.
+ pub fn peek3<T: Peek>(&self, token: T) -> bool {
+ fn peek3(buffer: &ParseBuffer, peek: fn(Cursor) -> bool) -> bool {
+ if let Some(group) = buffer.cursor().group(Delimiter::None) {
+ if group.0.skip().and_then(Cursor::skip).map_or(false, peek) {
+ return true;
+ }
+ }
+ buffer
+ .cursor()
+ .skip()
+ .and_then(Cursor::skip)
+ .map_or(false, peek)
+ }
+
+ let _ = token;
+ peek3(self, T::Token::peek)
+ }
+
+ /// Parses zero or more occurrences of `T` separated by punctuation of type
+ /// `P`, with optional trailing punctuation.
+ ///
+ /// Parsing continues until the end of this parse stream. The entire content
+ /// of this parse stream must consist of `T` and `P`.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// # use quote::quote;
+ /// #
+ /// use syn::{parenthesized, token, Ident, Result, Token, Type};
+ /// use syn::parse::{Parse, ParseStream};
+ /// use syn::punctuated::Punctuated;
+ ///
+ /// // Parse a simplified tuple struct syntax like:
+ /// //
+ /// // struct S(A, B);
+ /// struct TupleStruct {
+ /// struct_token: Token![struct],
+ /// ident: Ident,
+ /// paren_token: token::Paren,
+ /// fields: Punctuated<Type, Token![,]>,
+ /// semi_token: Token![;],
+ /// }
+ ///
+ /// impl Parse for TupleStruct {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// let content;
+ /// Ok(TupleStruct {
+ /// struct_token: input.parse()?,
+ /// ident: input.parse()?,
+ /// paren_token: parenthesized!(content in input),
+ /// fields: content.parse_terminated(Type::parse)?,
+ /// semi_token: input.parse()?,
+ /// })
+ /// }
+ /// }
+ /// #
+ /// # let input = quote! {
+ /// # struct S(A, B);
+ /// # };
+ /// # syn::parse2::<TupleStruct>(input).unwrap();
+ /// ```
+ pub fn parse_terminated<T, P: Parse>(
+ &self,
+ parser: fn(ParseStream) -> Result<T>,
+ ) -> Result<Punctuated<T, P>> {
+ Punctuated::parse_terminated_with(self, parser)
+ }
+
+ /// Returns whether there are tokens remaining in this stream.
+ ///
+ /// This method returns true at the end of the content of a set of
+ /// delimiters, as well as at the very end of the complete macro input.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use syn::{braced, token, Ident, Item, Result, Token};
+ /// use syn::parse::{Parse, ParseStream};
+ ///
+ /// // Parses a Rust `mod m { ... }` containing zero or more items.
+ /// struct Mod {
+ /// mod_token: Token![mod],
+ /// name: Ident,
+ /// brace_token: token::Brace,
+ /// items: Vec<Item>,
+ /// }
+ ///
+ /// impl Parse for Mod {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// let content;
+ /// Ok(Mod {
+ /// mod_token: input.parse()?,
+ /// name: input.parse()?,
+ /// brace_token: braced!(content in input),
+ /// items: {
+ /// let mut items = Vec::new();
+ /// while !content.is_empty() {
+ /// items.push(content.parse()?);
+ /// }
+ /// items
+ /// },
+ /// })
+ /// }
+ /// }
+ /// ```
+ pub fn is_empty(&self) -> bool {
+ self.cursor().eof()
+ }
+
+ /// Constructs a helper for peeking at the next token in this stream and
+ /// building an error message if it is not one of a set of expected tokens.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use syn::{ConstParam, Ident, Lifetime, LifetimeDef, Result, Token, TypeParam};
+ /// use syn::parse::{Parse, ParseStream};
+ ///
+ /// // A generic parameter, a single one of the comma-separated elements inside
+ /// // angle brackets in:
+ /// //
+ /// // fn f<T: Clone, 'a, 'b: 'a, const N: usize>() { ... }
+ /// //
+ /// // On invalid input, lookahead gives us a reasonable error message.
+ /// //
+ /// // error: expected one of: identifier, lifetime, `const`
+ /// // |
+ /// // 5 | fn f<!Sized>() {}
+ /// // | ^
+ /// enum GenericParam {
+ /// Type(TypeParam),
+ /// Lifetime(LifetimeDef),
+ /// Const(ConstParam),
+ /// }
+ ///
+ /// impl Parse for GenericParam {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// let lookahead = input.lookahead1();
+ /// if lookahead.peek(Ident) {
+ /// input.parse().map(GenericParam::Type)
+ /// } else if lookahead.peek(Lifetime) {
+ /// input.parse().map(GenericParam::Lifetime)
+ /// } else if lookahead.peek(Token![const]) {
+ /// input.parse().map(GenericParam::Const)
+ /// } else {
+ /// Err(lookahead.error())
+ /// }
+ /// }
+ /// }
+ /// ```
+ pub fn lookahead1(&self) -> Lookahead1<'a> {
+ lookahead::new(self.scope, self.cursor())
+ }
+
+ /// Forks a parse stream so that parsing tokens out of either the original
+ /// or the fork does not advance the position of the other.
+ ///
+ /// # Performance
+ ///
+ /// Forking a parse stream is a cheap fixed amount of work and does not
+ /// involve copying token buffers. Where you might hit performance problems
+ /// is if your macro ends up parsing a large amount of content more than
+ /// once.
+ ///
+ /// ```
+ /// # use syn::{Expr, Result};
+ /// # use syn::parse::ParseStream;
+ /// #
+ /// # fn bad(input: ParseStream) -> Result<Expr> {
+ /// // Do not do this.
+ /// if input.fork().parse::<Expr>().is_ok() {
+ /// return input.parse::<Expr>();
+ /// }
+ /// # unimplemented!()
+ /// # }
+ /// ```
+ ///
+ /// As a rule, avoid parsing an unbounded amount of tokens out of a forked
+ /// parse stream. Only use a fork when the amount of work performed against
+ /// the fork is small and bounded.
+ ///
+ /// When complex speculative parsing against the forked stream is
+ /// unavoidable, use [`parse::discouraged::Speculative`] to advance the
+ /// original stream once the fork's parse is determined to have been
+ /// successful.
+ ///
+ /// For a lower level way to perform speculative parsing at the token level,
+ /// consider using [`ParseStream::step`] instead.
+ ///
+ /// [`parse::discouraged::Speculative`]: discouraged::Speculative
+ /// [`ParseStream::step`]: ParseBuffer::step
+ ///
+ /// # Example
+ ///
+ /// The parse implementation shown here parses possibly restricted `pub`
+ /// visibilities.
+ ///
+ /// - `pub`
+ /// - `pub(crate)`
+ /// - `pub(self)`
+ /// - `pub(super)`
+ /// - `pub(in some::path)`
+ ///
+ /// To handle the case of visibilities inside of tuple structs, the parser
+ /// needs to distinguish parentheses that specify visibility restrictions
+ /// from parentheses that form part of a tuple type.
+ ///
+ /// ```
+ /// # struct A;
+ /// # struct B;
+ /// # struct C;
+ /// #
+ /// struct S(pub(crate) A, pub (B, C));
+ /// ```
+ ///
+ /// In this example input the first tuple struct element of `S` has
+ /// `pub(crate)` visibility while the second tuple struct element has `pub`
+ /// visibility; the parentheses around `(B, C)` are part of the type rather
+ /// than part of a visibility restriction.
+ ///
+ /// The parser uses a forked parse stream to check the first token inside of
+ /// parentheses after the `pub` keyword. This is a small bounded amount of
+ /// work performed against the forked parse stream.
+ ///
+ /// ```
+ /// use syn::{parenthesized, token, Ident, Path, Result, Token};
+ /// use syn::ext::IdentExt;
+ /// use syn::parse::{Parse, ParseStream};
+ ///
+ /// struct PubVisibility {
+ /// pub_token: Token![pub],
+ /// restricted: Option<Restricted>,
+ /// }
+ ///
+ /// struct Restricted {
+ /// paren_token: token::Paren,
+ /// in_token: Option<Token![in]>,
+ /// path: Path,
+ /// }
+ ///
+ /// impl Parse for PubVisibility {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// let pub_token: Token![pub] = input.parse()?;
+ ///
+ /// if input.peek(token::Paren) {
+ /// let ahead = input.fork();
+ /// let mut content;
+ /// parenthesized!(content in ahead);
+ ///
+ /// if content.peek(Token![crate])
+ /// || content.peek(Token![self])
+ /// || content.peek(Token![super])
+ /// {
+ /// return Ok(PubVisibility {
+ /// pub_token,
+ /// restricted: Some(Restricted {
+ /// paren_token: parenthesized!(content in input),
+ /// in_token: None,
+ /// path: Path::from(content.call(Ident::parse_any)?),
+ /// }),
+ /// });
+ /// } else if content.peek(Token![in]) {
+ /// return Ok(PubVisibility {
+ /// pub_token,
+ /// restricted: Some(Restricted {
+ /// paren_token: parenthesized!(content in input),
+ /// in_token: Some(content.parse()?),
+ /// path: content.call(Path::parse_mod_style)?,
+ /// }),
+ /// });
+ /// }
+ /// }
+ ///
+ /// Ok(PubVisibility {
+ /// pub_token,
+ /// restricted: None,
+ /// })
+ /// }
+ /// }
+ /// ```
+ pub fn fork(&self) -> Self {
+ ParseBuffer {
+ scope: self.scope,
+ cell: self.cell.clone(),
+ marker: PhantomData,
+ // Not the parent's unexpected. Nothing cares whether the clone
+ // parses all the way unless we `advance_to`.
+ unexpected: Cell::new(Some(Rc::new(Cell::new(Unexpected::None)))),
+ }
+ }
+
+ /// Triggers an error at the current position of the parse stream.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use syn::{Expr, Result, Token};
+ /// use syn::parse::{Parse, ParseStream};
+ ///
+ /// // Some kind of loop: `while` or `for` or `loop`.
+ /// struct Loop {
+ /// expr: Expr,
+ /// }
+ ///
+ /// impl Parse for Loop {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// if input.peek(Token![while])
+ /// || input.peek(Token![for])
+ /// || input.peek(Token![loop])
+ /// {
+ /// Ok(Loop {
+ /// expr: input.parse()?,
+ /// })
+ /// } else {
+ /// Err(input.error("expected some kind of loop"))
+ /// }
+ /// }
+ /// }
+ /// ```
+ pub fn error<T: Display>(&self, message: T) -> Error {
+ error::new_at(self.scope, self.cursor(), message)
+ }
+
+ /// Speculatively parses tokens from this parse stream, advancing the
+ /// position of this stream only if parsing succeeds.
+ ///
+ /// This is a powerful low-level API used for defining the `Parse` impls of
+ /// the basic built-in token types. It is not something that will be used
+ /// widely outside of the Syn codebase.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use proc_macro2::TokenTree;
+ /// use syn::Result;
+ /// use syn::parse::ParseStream;
+ ///
+ /// // This function advances the stream past the next occurrence of `@`. If
+ /// // no `@` is present in the stream, the stream position is unchanged and
+ /// // an error is returned.
+ /// fn skip_past_next_at(input: ParseStream) -> Result<()> {
+ /// input.step(|cursor| {
+ /// let mut rest = *cursor;
+ /// while let Some((tt, next)) = rest.token_tree() {
+ /// match &tt {
+ /// TokenTree::Punct(punct) if punct.as_char() == '@' => {
+ /// return Ok(((), next));
+ /// }
+ /// _ => rest = next,
+ /// }
+ /// }
+ /// Err(cursor.error("no `@` was found after this point"))
+ /// })
+ /// }
+ /// #
+ /// # fn remainder_after_skipping_past_next_at(
+ /// # input: ParseStream,
+ /// # ) -> Result<proc_macro2::TokenStream> {
+ /// # skip_past_next_at(input)?;
+ /// # input.parse()
+ /// # }
+ /// #
+ /// # use syn::parse::Parser;
+ /// # let remainder = remainder_after_skipping_past_next_at
+ /// # .parse_str("a @ b c")
+ /// # .unwrap();
+ /// # assert_eq!(remainder.to_string(), "b c");
+ /// ```
+ pub fn step<F, R>(&self, function: F) -> Result<R>
+ where
+ F: for<'c> FnOnce(StepCursor<'c, 'a>) -> Result<(R, Cursor<'c>)>,
+ {
+ // Since the user's function is required to work for any 'c, we know
+ // that the Cursor<'c> they return is either derived from the input
+ // StepCursor<'c, 'a> or from a Cursor<'static>.
+ //
+ // It would not be legal to write this function without the invariant
+ // lifetime 'c in StepCursor<'c, 'a>. If this function were written only
+ // in terms of 'a, the user could take our ParseBuffer<'a>, upcast it to
+ // a ParseBuffer<'short> which some shorter lifetime than 'a, invoke
+ // `step` on their ParseBuffer<'short> with a closure that returns
+ // Cursor<'short>, and we would wrongly write that Cursor<'short> into
+ // the Cell intended to hold Cursor<'a>.
+ //
+ // In some cases it may be necessary for R to contain a Cursor<'a>.
+ // Within Syn we solve this using `advance_step_cursor` which uses the
+ // existence of a StepCursor<'c, 'a> as proof that it is safe to cast
+ // from Cursor<'c> to Cursor<'a>. If needed outside of Syn, it would be
+ // safe to expose that API as a method on StepCursor.
+ let (node, rest) = function(StepCursor {
+ scope: self.scope,
+ cursor: self.cell.get(),
+ marker: PhantomData,
+ })?;
+ self.cell.set(rest);
+ Ok(node)
+ }
+
+ /// Returns the `Span` of the next token in the parse stream, or
+ /// `Span::call_site()` if this parse stream has completely exhausted its
+ /// input `TokenStream`.
+ pub fn span(&self) -> Span {
+ let cursor = self.cursor();
+ if cursor.eof() {
+ self.scope
+ } else {
+ crate::buffer::open_span_of_group(cursor)
+ }
+ }
+
+ /// Provides low-level access to the token representation underlying this
+ /// parse stream.
+ ///
+ /// Cursors are immutable so no operations you perform against the cursor
+ /// will affect the state of this parse stream.
+ pub fn cursor(&self) -> Cursor<'a> {
+ self.cell.get()
+ }
+
+ fn check_unexpected(&self) -> Result<()> {
+ match inner_unexpected(self).1 {
+ Some(span) => Err(Error::new(span, "unexpected token")),
+ None => Ok(()),
+ }
+ }
+}
+
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+impl<T: Parse> Parse for Box<T> {
+ fn parse(input: ParseStream) -> Result<Self> {
+ input.parse().map(Box::new)
+ }
+}
+
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+impl<T: Parse + Token> Parse for Option<T> {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if T::peek(input.cursor()) {
+ Ok(Some(input.parse()?))
+ } else {
+ Ok(None)
+ }
+ }
+}
+
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+impl Parse for TokenStream {
+ fn parse(input: ParseStream) -> Result<Self> {
+ input.step(|cursor| Ok((cursor.token_stream(), Cursor::empty())))
+ }
+}
+
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+impl Parse for TokenTree {
+ fn parse(input: ParseStream) -> Result<Self> {
+ input.step(|cursor| match cursor.token_tree() {
+ Some((tt, rest)) => Ok((tt, rest)),
+ None => Err(cursor.error("expected token tree")),
+ })
+ }
+}
+
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+impl Parse for Group {
+ fn parse(input: ParseStream) -> Result<Self> {
+ input.step(|cursor| {
+ for delim in &[Delimiter::Parenthesis, Delimiter::Brace, Delimiter::Bracket] {
+ if let Some((inside, span, rest)) = cursor.group(*delim) {
+ let mut group = Group::new(*delim, inside.token_stream());
+ group.set_span(span);
+ return Ok((group, rest));
+ }
+ }
+ Err(cursor.error("expected group token"))
+ })
+ }
+}
+
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+impl Parse for Punct {
+ fn parse(input: ParseStream) -> Result<Self> {
+ input.step(|cursor| match cursor.punct() {
+ Some((punct, rest)) => Ok((punct, rest)),
+ None => Err(cursor.error("expected punctuation token")),
+ })
+ }
+}
+
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+impl Parse for Literal {
+ fn parse(input: ParseStream) -> Result<Self> {
+ input.step(|cursor| match cursor.literal() {
+ Some((literal, rest)) => Ok((literal, rest)),
+ None => Err(cursor.error("expected literal token")),
+ })
+ }
+}
+
+/// Parser that can parse Rust tokens into a particular syntax tree node.
+///
+/// Refer to the [module documentation] for details about parsing in Syn.
+///
+/// [module documentation]: self
+///
+/// *This trait is available only if Syn is built with the `"parsing"` feature.*
+pub trait Parser: Sized {
+ type Output;
+
+ /// Parse a proc-macro2 token stream into the chosen syntax tree node.
+ ///
+ /// This function will check that the input is fully parsed. If there are
+ /// any unparsed tokens at the end of the stream, an error is returned.
+ fn parse2(self, tokens: TokenStream) -> Result<Self::Output>;
+
+ /// Parse tokens of source code into the chosen syntax tree node.
+ ///
+ /// This function will check that the input is fully parsed. If there are
+ /// any unparsed tokens at the end of the stream, an error is returned.
+ ///
+ /// *This method is available only if Syn is built with both the `"parsing"` and
+ /// `"proc-macro"` features.*
+ #[cfg(all(
+ not(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "wasi"))),
+ feature = "proc-macro"
+ ))]
+ fn parse(self, tokens: proc_macro::TokenStream) -> Result<Self::Output> {
+ self.parse2(proc_macro2::TokenStream::from(tokens))
+ }
+
+ /// Parse a string of Rust code into the chosen syntax tree node.
+ ///
+ /// This function will check that the input is fully parsed. If there are
+ /// any unparsed tokens at the end of the string, an error is returned.
+ ///
+ /// # Hygiene
+ ///
+ /// Every span in the resulting syntax tree will be set to resolve at the
+ /// macro call site.
+ fn parse_str(self, s: &str) -> Result<Self::Output> {
+ self.parse2(proc_macro2::TokenStream::from_str(s)?)
+ }
+
+ // Not public API.
+ #[doc(hidden)]
+ #[cfg(any(feature = "full", feature = "derive"))]
+ fn __parse_scoped(self, scope: Span, tokens: TokenStream) -> Result<Self::Output> {
+ let _ = scope;
+ self.parse2(tokens)
+ }
+
+ // Not public API.
+ #[doc(hidden)]
+ #[cfg(any(feature = "full", feature = "derive"))]
+ fn __parse_stream(self, input: ParseStream) -> Result<Self::Output> {
+ input.parse().and_then(|tokens| self.parse2(tokens))
+ }
+}
+
+fn tokens_to_parse_buffer(tokens: &TokenBuffer) -> ParseBuffer {
+ let scope = Span::call_site();
+ let cursor = tokens.begin();
+ let unexpected = Rc::new(Cell::new(Unexpected::None));
+ new_parse_buffer(scope, cursor, unexpected)
+}
+
+impl<F, T> Parser for F
+where
+ F: FnOnce(ParseStream) -> Result<T>,
+{
+ type Output = T;
+
+ fn parse2(self, tokens: TokenStream) -> Result<T> {
+ let buf = TokenBuffer::new2(tokens);
+ let state = tokens_to_parse_buffer(&buf);
+ let node = self(&state)?;
+ state.check_unexpected()?;
+ if let Some(unexpected_span) = span_of_unexpected_ignoring_nones(state.cursor()) {
+ Err(Error::new(unexpected_span, "unexpected token"))
+ } else {
+ Ok(node)
+ }
+ }
+
+ #[cfg(any(feature = "full", feature = "derive"))]
+ fn __parse_scoped(self, scope: Span, tokens: TokenStream) -> Result<Self::Output> {
+ let buf = TokenBuffer::new2(tokens);
+ let cursor = buf.begin();
+ let unexpected = Rc::new(Cell::new(Unexpected::None));
+ let state = new_parse_buffer(scope, cursor, unexpected);
+ let node = self(&state)?;
+ state.check_unexpected()?;
+ if let Some(unexpected_span) = span_of_unexpected_ignoring_nones(state.cursor()) {
+ Err(Error::new(unexpected_span, "unexpected token"))
+ } else {
+ Ok(node)
+ }
+ }
+
+ #[cfg(any(feature = "full", feature = "derive"))]
+ fn __parse_stream(self, input: ParseStream) -> Result<Self::Output> {
+ self(input)
+ }
+}
+
+#[cfg(any(feature = "full", feature = "derive"))]
+pub(crate) fn parse_scoped<F: Parser>(f: F, scope: Span, tokens: TokenStream) -> Result<F::Output> {
+ f.__parse_scoped(scope, tokens)
+}
+
+#[cfg(any(feature = "full", feature = "derive"))]
+pub(crate) fn parse_stream<F: Parser>(f: F, input: ParseStream) -> Result<F::Output> {
+ f.__parse_stream(input)
+}
+
+/// An empty syntax tree node that consumes no tokens when parsed.
+///
+/// This is useful for attribute macros that want to ensure they are not
+/// provided any attribute args.
+///
+/// ```
+/// # extern crate proc_macro;
+/// #
+/// use proc_macro::TokenStream;
+/// use syn::parse_macro_input;
+/// use syn::parse::Nothing;
+///
+/// # const IGNORE: &str = stringify! {
+/// #[proc_macro_attribute]
+/// # };
+/// pub fn my_attr(args: TokenStream, input: TokenStream) -> TokenStream {
+/// parse_macro_input!(args as Nothing);
+///
+/// /* ... */
+/// # "".parse().unwrap()
+/// }
+/// ```
+///
+/// ```text
+/// error: unexpected token
+/// --> src/main.rs:3:19
+/// |
+/// 3 | #[my_attr(asdf)]
+/// | ^^^^
+/// ```
+pub struct Nothing;
+
+impl Parse for Nothing {
+ fn parse(_input: ParseStream) -> Result<Self> {
+ Ok(Nothing)
+ }
+}
+
+#[cfg(feature = "extra-traits")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Nothing {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ f.write_str("Nothing")
+ }
+}
+
+#[cfg(feature = "extra-traits")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Eq for Nothing {}
+
+#[cfg(feature = "extra-traits")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl PartialEq for Nothing {
+ fn eq(&self, _other: &Self) -> bool {
+ true
+ }
+}
+
+#[cfg(feature = "extra-traits")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Hash for Nothing {
+ fn hash<H: Hasher>(&self, _state: &mut H) {}
+}
diff --git a/third_party/rust/syn/src/parse_macro_input.rs b/third_party/rust/syn/src/parse_macro_input.rs
new file mode 100644
index 0000000000..6163cd70af
--- /dev/null
+++ b/third_party/rust/syn/src/parse_macro_input.rs
@@ -0,0 +1,179 @@
+/// Parse the input TokenStream of a macro, triggering a compile error if the
+/// tokens fail to parse.
+///
+/// Refer to the [`parse` module] documentation for more details about parsing
+/// in Syn.
+///
+/// [`parse` module]: mod@crate::parse
+///
+/// <br>
+///
+/// # Intended usage
+///
+/// This macro must be called from a function that returns
+/// `proc_macro::TokenStream`. Usually this will be your proc macro entry point,
+/// the function that has the #\[proc_macro\] / #\[proc_macro_derive\] /
+/// #\[proc_macro_attribute\] attribute.
+///
+/// ```
+/// # extern crate proc_macro;
+/// #
+/// use proc_macro::TokenStream;
+/// use syn::{parse_macro_input, Result};
+/// use syn::parse::{Parse, ParseStream};
+///
+/// struct MyMacroInput {
+/// /* ... */
+/// }
+///
+/// impl Parse for MyMacroInput {
+/// fn parse(input: ParseStream) -> Result<Self> {
+/// /* ... */
+/// # Ok(MyMacroInput {})
+/// }
+/// }
+///
+/// # const IGNORE: &str = stringify! {
+/// #[proc_macro]
+/// # };
+/// pub fn my_macro(tokens: TokenStream) -> TokenStream {
+/// let input = parse_macro_input!(tokens as MyMacroInput);
+///
+/// /* ... */
+/// # "".parse().unwrap()
+/// }
+/// ```
+///
+/// <br>
+///
+/// # Usage with Parser
+///
+/// This macro can also be used with the [`Parser` trait] for types that have
+/// multiple ways that they can be parsed.
+///
+/// [`Parser` trait]: crate::parse::Parser
+///
+/// ```
+/// # extern crate proc_macro;
+/// #
+/// # use proc_macro::TokenStream;
+/// # use syn::{parse_macro_input, Result};
+/// # use syn::parse::ParseStream;
+/// #
+/// # struct MyMacroInput {}
+/// #
+/// impl MyMacroInput {
+/// fn parse_alternate(input: ParseStream) -> Result<Self> {
+/// /* ... */
+/// # Ok(MyMacroInput {})
+/// }
+/// }
+///
+/// # const IGNORE: &str = stringify! {
+/// #[proc_macro]
+/// # };
+/// pub fn my_macro(tokens: TokenStream) -> TokenStream {
+/// let input = parse_macro_input!(tokens with MyMacroInput::parse_alternate);
+///
+/// /* ... */
+/// # "".parse().unwrap()
+/// }
+/// ```
+///
+/// <br>
+///
+/// # Expansion
+///
+/// `parse_macro_input!($variable as $Type)` expands to something like:
+///
+/// ```no_run
+/// # extern crate proc_macro;
+/// #
+/// # macro_rules! doc_test {
+/// # ($variable:ident as $Type:ty) => {
+/// match syn::parse::<$Type>($variable) {
+/// Ok(syntax_tree) => syntax_tree,
+/// Err(err) => return proc_macro::TokenStream::from(err.to_compile_error()),
+/// }
+/// # };
+/// # }
+/// #
+/// # fn test(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+/// # let _ = doc_test!(input as syn::Ident);
+/// # proc_macro::TokenStream::new()
+/// # }
+/// ```
+#[macro_export]
+#[cfg_attr(doc_cfg, doc(cfg(all(feature = "parsing", feature = "proc-macro"))))]
+macro_rules! parse_macro_input {
+ ($tokenstream:ident as $ty:ty) => {
+ match $crate::parse_macro_input::parse::<$ty>($tokenstream) {
+ $crate::__private::Ok(data) => data,
+ $crate::__private::Err(err) => {
+ return $crate::__private::TokenStream::from(err.to_compile_error());
+ }
+ }
+ };
+ ($tokenstream:ident with $parser:path) => {
+ match $crate::parse::Parser::parse($parser, $tokenstream) {
+ $crate::__private::Ok(data) => data,
+ $crate::__private::Err(err) => {
+ return $crate::__private::TokenStream::from(err.to_compile_error());
+ }
+ }
+ };
+ ($tokenstream:ident) => {
+ $crate::parse_macro_input!($tokenstream as _)
+ };
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Can parse any type that implements Parse.
+
+use crate::parse::{Parse, ParseStream, Parser, Result};
+use proc_macro::TokenStream;
+
+// Not public API.
+#[doc(hidden)]
+pub fn parse<T: ParseMacroInput>(token_stream: TokenStream) -> Result<T> {
+ T::parse.parse(token_stream)
+}
+
+// Not public API.
+#[doc(hidden)]
+pub trait ParseMacroInput: Sized {
+ fn parse(input: ParseStream) -> Result<Self>;
+}
+
+impl<T: Parse> ParseMacroInput for T {
+ fn parse(input: ParseStream) -> Result<Self> {
+ <T as Parse>::parse(input)
+ }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Any other types that we want `parse_macro_input!` to be able to parse.
+
+#[cfg(any(feature = "full", feature = "derive"))]
+use crate::AttributeArgs;
+
+#[cfg(any(feature = "full", feature = "derive"))]
+impl ParseMacroInput for AttributeArgs {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let mut metas = Vec::new();
+
+ loop {
+ if input.is_empty() {
+ break;
+ }
+ let value = input.parse()?;
+ metas.push(value);
+ if input.is_empty() {
+ break;
+ }
+ input.parse::<Token![,]>()?;
+ }
+
+ Ok(metas)
+ }
+}
diff --git a/third_party/rust/syn/src/parse_quote.rs b/third_party/rust/syn/src/parse_quote.rs
new file mode 100644
index 0000000000..8deae4e526
--- /dev/null
+++ b/third_party/rust/syn/src/parse_quote.rs
@@ -0,0 +1,167 @@
+/// Quasi-quotation macro that accepts input like the [`quote!`] macro but uses
+/// type inference to figure out a return type for those tokens.
+///
+/// [`quote!`]: https://docs.rs/quote/1.0/quote/index.html
+///
+/// The return type can be any syntax tree node that implements the [`Parse`]
+/// trait.
+///
+/// [`Parse`]: crate::parse::Parse
+///
+/// ```
+/// use quote::quote;
+/// use syn::{parse_quote, Stmt};
+///
+/// fn main() {
+/// let name = quote!(v);
+/// let ty = quote!(u8);
+///
+/// let stmt: Stmt = parse_quote! {
+/// let #name: #ty = Default::default();
+/// };
+///
+/// println!("{:#?}", stmt);
+/// }
+/// ```
+///
+/// *This macro is available only if Syn is built with the `"parsing"` feature,
+/// although interpolation of syntax tree nodes into the quoted tokens is only
+/// supported if Syn is built with the `"printing"` feature as well.*
+///
+/// # Example
+///
+/// The following helper function adds a bound `T: HeapSize` to every type
+/// parameter `T` in the input generics.
+///
+/// ```
+/// use syn::{parse_quote, Generics, GenericParam};
+///
+/// // Add a bound `T: HeapSize` to every type parameter T.
+/// fn add_trait_bounds(mut generics: Generics) -> Generics {
+/// for param in &mut generics.params {
+/// if let GenericParam::Type(type_param) = param {
+/// type_param.bounds.push(parse_quote!(HeapSize));
+/// }
+/// }
+/// generics
+/// }
+/// ```
+///
+/// # Special cases
+///
+/// This macro can parse the following additional types as a special case even
+/// though they do not implement the `Parse` trait.
+///
+/// - [`Attribute`] — parses one attribute, allowing either outer like `#[...]`
+/// or inner like `#![...]`
+/// - [`Punctuated<T, P>`] — parses zero or more `T` separated by punctuation
+/// `P` with optional trailing punctuation
+/// - [`Vec<Stmt>`] — parses the same as `Block::parse_within`
+///
+/// [`Vec<Stmt>`]: Block::parse_within
+///
+/// # Panics
+///
+/// Panics if the tokens fail to parse as the expected syntax tree type. The
+/// caller is responsible for ensuring that the input tokens are syntactically
+/// valid.
+#[cfg_attr(doc_cfg, doc(cfg(all(feature = "parsing", feature = "printing"))))]
+#[macro_export]
+macro_rules! parse_quote {
+ ($($tt:tt)*) => {
+ $crate::parse_quote::parse($crate::__private::quote::quote!($($tt)*))
+ };
+}
+
+/// This macro is [`parse_quote!`] + [`quote_spanned!`][quote::quote_spanned].
+///
+/// Please refer to each of their documentation.
+///
+/// # Example
+///
+/// ```
+/// use quote::{quote, quote_spanned};
+/// use syn::spanned::Spanned;
+/// use syn::{parse_quote_spanned, ReturnType, Signature};
+///
+/// // Changes `fn()` to `fn() -> Pin<Box<dyn Future<Output = ()>>>`,
+/// // and `fn() -> T` to `fn() -> Pin<Box<dyn Future<Output = T>>>`,
+/// // without introducing any call_site() spans.
+/// fn make_ret_pinned_future(sig: &mut Signature) {
+/// let ret = match &sig.output {
+/// ReturnType::Default => quote_spanned!(sig.paren_token.span=> ()),
+/// ReturnType::Type(_, ret) => quote!(#ret),
+/// };
+/// sig.output = parse_quote_spanned! {ret.span()=>
+/// -> ::std::pin::Pin<::std::boxed::Box<dyn ::std::future::Future<Output = #ret>>>
+/// };
+/// }
+/// ```
+#[cfg_attr(doc_cfg, doc(cfg(all(feature = "parsing", feature = "printing"))))]
+#[macro_export]
+macro_rules! parse_quote_spanned {
+ ($span:expr=> $($tt:tt)*) => {
+ $crate::parse_quote::parse($crate::__private::quote::quote_spanned!($span=> $($tt)*))
+ };
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Can parse any type that implements Parse.
+
+use crate::parse::{Parse, ParseStream, Parser, Result};
+use proc_macro2::TokenStream;
+
+// Not public API.
+#[doc(hidden)]
+pub fn parse<T: ParseQuote>(token_stream: TokenStream) -> T {
+ let parser = T::parse;
+ match parser.parse2(token_stream) {
+ Ok(t) => t,
+ Err(err) => panic!("{}", err),
+ }
+}
+
+// Not public API.
+#[doc(hidden)]
+pub trait ParseQuote: Sized {
+ fn parse(input: ParseStream) -> Result<Self>;
+}
+
+impl<T: Parse> ParseQuote for T {
+ fn parse(input: ParseStream) -> Result<Self> {
+ <T as Parse>::parse(input)
+ }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Any other types that we want `parse_quote!` to be able to parse.
+
+use crate::punctuated::Punctuated;
+#[cfg(any(feature = "full", feature = "derive"))]
+use crate::{attr, Attribute};
+#[cfg(feature = "full")]
+use crate::{Block, Stmt};
+
+#[cfg(any(feature = "full", feature = "derive"))]
+impl ParseQuote for Attribute {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Token![#]) && input.peek2(Token![!]) {
+ attr::parsing::single_parse_inner(input)
+ } else {
+ attr::parsing::single_parse_outer(input)
+ }
+ }
+}
+
+impl<T: Parse, P: Parse> ParseQuote for Punctuated<T, P> {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Self::parse_terminated(input)
+ }
+}
+
+#[cfg(feature = "full")]
+impl ParseQuote for Vec<Stmt> {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Block::parse_within(input)
+ }
+}
diff --git a/third_party/rust/syn/src/pat.rs b/third_party/rust/syn/src/pat.rs
new file mode 100644
index 0000000000..b279186aa0
--- /dev/null
+++ b/third_party/rust/syn/src/pat.rs
@@ -0,0 +1,927 @@
+use super::*;
+use crate::punctuated::Punctuated;
+use proc_macro2::TokenStream;
+
+ast_enum_of_structs! {
+ /// A pattern in a local binding, function signature, match expression, or
+ /// various other places.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ #[cfg_attr(not(syn_no_non_exhaustive), non_exhaustive)]
+ pub enum Pat {
+ /// A box pattern: `box v`.
+ Box(PatBox),
+
+ /// A pattern that binds a new variable: `ref mut binding @ SUBPATTERN`.
+ Ident(PatIdent),
+
+ /// A literal pattern: `0`.
+ ///
+ /// This holds an `Expr` rather than a `Lit` because negative numbers
+ /// are represented as an `Expr::Unary`.
+ Lit(PatLit),
+
+ /// A macro in pattern position.
+ Macro(PatMacro),
+
+ /// A pattern that matches any one of a set of cases.
+ Or(PatOr),
+
+ /// A path pattern like `Color::Red`, optionally qualified with a
+ /// self-type.
+ ///
+ /// Unqualified path patterns can legally refer to variants, structs,
+ /// constants or associated constants. Qualified path patterns like
+ /// `<A>::B::C` and `<A as Trait>::B::C` can only legally refer to
+ /// associated constants.
+ Path(PatPath),
+
+ /// A range pattern: `1..=2`.
+ Range(PatRange),
+
+ /// A reference pattern: `&mut var`.
+ Reference(PatReference),
+
+ /// The dots in a tuple or slice pattern: `[0, 1, ..]`
+ Rest(PatRest),
+
+ /// A dynamically sized slice pattern: `[a, b, ref i @ .., y, z]`.
+ Slice(PatSlice),
+
+ /// A struct or struct variant pattern: `Variant { x, y, .. }`.
+ Struct(PatStruct),
+
+ /// A tuple pattern: `(a, b)`.
+ Tuple(PatTuple),
+
+ /// A tuple struct or tuple variant pattern: `Variant(x, y, .., z)`.
+ TupleStruct(PatTupleStruct),
+
+ /// A type ascription pattern: `foo: f64`.
+ Type(PatType),
+
+ /// Tokens in pattern position not interpreted by Syn.
+ Verbatim(TokenStream),
+
+ /// A pattern that matches any value: `_`.
+ Wild(PatWild),
+
+ // Not public API.
+ //
+ // For testing exhaustiveness in downstream code, use the following idiom:
+ //
+ // match pat {
+ // Pat::Box(pat) => {...}
+ // Pat::Ident(pat) => {...}
+ // ...
+ // Pat::Wild(pat) => {...}
+ //
+ // #[cfg_attr(test, deny(non_exhaustive_omitted_patterns))]
+ // _ => { /* some sane fallback */ }
+ // }
+ //
+ // This way we fail your tests but don't break your library when adding
+ // a variant. You will be notified by a test failure when a variant is
+ // added, so that you can add code to handle it, but your library will
+ // continue to compile and work for downstream users in the interim.
+ #[cfg(syn_no_non_exhaustive)]
+ #[doc(hidden)]
+ __NonExhaustive,
+ }
+}
+
+ast_struct! {
+ /// A box pattern: `box v`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatBox {
+ pub attrs: Vec<Attribute>,
+ pub box_token: Token![box],
+ pub pat: Box<Pat>,
+ }
+}
+
+ast_struct! {
+ /// A pattern that binds a new variable: `ref mut binding @ SUBPATTERN`.
+ ///
+ /// It may also be a unit struct or struct variant (e.g. `None`), or a
+ /// constant; these cannot be distinguished syntactically.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatIdent {
+ pub attrs: Vec<Attribute>,
+ pub by_ref: Option<Token![ref]>,
+ pub mutability: Option<Token![mut]>,
+ pub ident: Ident,
+ pub subpat: Option<(Token![@], Box<Pat>)>,
+ }
+}
+
+ast_struct! {
+ /// A literal pattern: `0`.
+ ///
+ /// This holds an `Expr` rather than a `Lit` because negative numbers
+ /// are represented as an `Expr::Unary`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatLit {
+ pub attrs: Vec<Attribute>,
+ pub expr: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// A macro in pattern position.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatMacro {
+ pub attrs: Vec<Attribute>,
+ pub mac: Macro,
+ }
+}
+
+ast_struct! {
+ /// A pattern that matches any one of a set of cases.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatOr {
+ pub attrs: Vec<Attribute>,
+ pub leading_vert: Option<Token![|]>,
+ pub cases: Punctuated<Pat, Token![|]>,
+ }
+}
+
+ast_struct! {
+ /// A path pattern like `Color::Red`, optionally qualified with a
+ /// self-type.
+ ///
+ /// Unqualified path patterns can legally refer to variants, structs,
+ /// constants or associated constants. Qualified path patterns like
+ /// `<A>::B::C` and `<A as Trait>::B::C` can only legally refer to
+ /// associated constants.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatPath {
+ pub attrs: Vec<Attribute>,
+ pub qself: Option<QSelf>,
+ pub path: Path,
+ }
+}
+
+ast_struct! {
+ /// A range pattern: `1..=2`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatRange {
+ pub attrs: Vec<Attribute>,
+ pub lo: Box<Expr>,
+ pub limits: RangeLimits,
+ pub hi: Box<Expr>,
+ }
+}
+
+ast_struct! {
+ /// A reference pattern: `&mut var`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatReference {
+ pub attrs: Vec<Attribute>,
+ pub and_token: Token![&],
+ pub mutability: Option<Token![mut]>,
+ pub pat: Box<Pat>,
+ }
+}
+
+ast_struct! {
+ /// The dots in a tuple or slice pattern: `[0, 1, ..]`
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatRest {
+ pub attrs: Vec<Attribute>,
+ pub dot2_token: Token![..],
+ }
+}
+
+ast_struct! {
+ /// A dynamically sized slice pattern: `[a, b, ref i @ .., y, z]`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatSlice {
+ pub attrs: Vec<Attribute>,
+ pub bracket_token: token::Bracket,
+ pub elems: Punctuated<Pat, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// A struct or struct variant pattern: `Variant { x, y, .. }`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatStruct {
+ pub attrs: Vec<Attribute>,
+ pub path: Path,
+ pub brace_token: token::Brace,
+ pub fields: Punctuated<FieldPat, Token![,]>,
+ pub dot2_token: Option<Token![..]>,
+ }
+}
+
+ast_struct! {
+ /// A tuple pattern: `(a, b)`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatTuple {
+ pub attrs: Vec<Attribute>,
+ pub paren_token: token::Paren,
+ pub elems: Punctuated<Pat, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// A tuple struct or tuple variant pattern: `Variant(x, y, .., z)`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatTupleStruct {
+ pub attrs: Vec<Attribute>,
+ pub path: Path,
+ pub pat: PatTuple,
+ }
+}
+
+ast_struct! {
+ /// A type ascription pattern: `foo: f64`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatType {
+ pub attrs: Vec<Attribute>,
+ pub pat: Box<Pat>,
+ pub colon_token: Token![:],
+ pub ty: Box<Type>,
+ }
+}
+
+ast_struct! {
+ /// A pattern that matches any value: `_`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct PatWild {
+ pub attrs: Vec<Attribute>,
+ pub underscore_token: Token![_],
+ }
+}
+
+ast_struct! {
+ /// A single field in a struct pattern.
+ ///
+ /// Patterns like the fields of Foo `{ x, ref y, ref mut z }` are treated
+ /// the same as `x: x, y: ref y, z: ref mut z` but there is no colon token.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct FieldPat {
+ pub attrs: Vec<Attribute>,
+ pub member: Member,
+ pub colon_token: Option<Token![:]>,
+ pub pat: Box<Pat>,
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::ext::IdentExt;
+ use crate::parse::{Parse, ParseBuffer, ParseStream, Result};
+ use crate::path;
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Pat {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let begin = input.fork();
+ let lookahead = input.lookahead1();
+ if {
+ let ahead = input.fork();
+ ahead.parse::<Option<Ident>>()?.is_some()
+ && (ahead.peek(Token![::])
+ || ahead.peek(Token![!])
+ || ahead.peek(token::Brace)
+ || ahead.peek(token::Paren)
+ || ahead.peek(Token![..])
+ && ahead.parse::<RangeLimits>().is_ok()
+ && !(ahead.is_empty() || ahead.peek(Token![,])))
+ } || {
+ let ahead = input.fork();
+ ahead.parse::<Option<Token![self]>>()?.is_some() && ahead.peek(Token![::])
+ } || lookahead.peek(Token![::])
+ || lookahead.peek(Token![<])
+ || input.peek(Token![Self])
+ || input.peek(Token![super])
+ || input.peek(Token![crate])
+ {
+ pat_path_or_macro_or_struct_or_range(input)
+ } else if lookahead.peek(Token![_]) {
+ input.call(pat_wild).map(Pat::Wild)
+ } else if input.peek(Token![box]) {
+ input.call(pat_box).map(Pat::Box)
+ } else if input.peek(Token![-]) || lookahead.peek(Lit) || lookahead.peek(Token![const])
+ {
+ pat_lit_or_range(input)
+ } else if lookahead.peek(Token![ref])
+ || lookahead.peek(Token![mut])
+ || input.peek(Token![self])
+ || input.peek(Ident)
+ {
+ input.call(pat_ident).map(Pat::Ident)
+ } else if lookahead.peek(Token![&]) {
+ input.call(pat_reference).map(Pat::Reference)
+ } else if lookahead.peek(token::Paren) {
+ input.call(pat_tuple).map(Pat::Tuple)
+ } else if lookahead.peek(token::Bracket) {
+ input.call(pat_slice).map(Pat::Slice)
+ } else if lookahead.peek(Token![..]) && !input.peek(Token![...]) {
+ pat_range_half_open(input, begin)
+ } else if lookahead.peek(Token![const]) {
+ input.call(pat_const).map(Pat::Verbatim)
+ } else {
+ Err(lookahead.error())
+ }
+ }
+ }
+
+ fn pat_path_or_macro_or_struct_or_range(input: ParseStream) -> Result<Pat> {
+ let begin = input.fork();
+ let (qself, path) = path::parsing::qpath(input, true)?;
+
+ if qself.is_none() && input.peek(Token![!]) && !input.peek(Token![!=]) {
+ let mut contains_arguments = false;
+ for segment in &path.segments {
+ match segment.arguments {
+ PathArguments::None => {}
+ PathArguments::AngleBracketed(_) | PathArguments::Parenthesized(_) => {
+ contains_arguments = true;
+ }
+ }
+ }
+
+ if !contains_arguments {
+ let bang_token: Token![!] = input.parse()?;
+ let (delimiter, tokens) = mac::parse_delimiter(input)?;
+ return Ok(Pat::Macro(PatMacro {
+ attrs: Vec::new(),
+ mac: Macro {
+ path,
+ bang_token,
+ delimiter,
+ tokens,
+ },
+ }));
+ }
+ }
+
+ if input.peek(token::Brace) {
+ let pat = pat_struct(begin.fork(), input, path)?;
+ if qself.is_some() {
+ Ok(Pat::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Ok(pat)
+ }
+ } else if input.peek(token::Paren) {
+ let pat = pat_tuple_struct(input, path)?;
+ if qself.is_some() {
+ Ok(Pat::Verbatim(verbatim::between(begin, input)))
+ } else {
+ Ok(Pat::TupleStruct(pat))
+ }
+ } else if input.peek(Token![..]) {
+ pat_range(input, begin, qself, path)
+ } else {
+ Ok(Pat::Path(PatPath {
+ attrs: Vec::new(),
+ qself,
+ path,
+ }))
+ }
+ }
+
+ fn pat_wild(input: ParseStream) -> Result<PatWild> {
+ Ok(PatWild {
+ attrs: Vec::new(),
+ underscore_token: input.parse()?,
+ })
+ }
+
+ fn pat_box(input: ParseStream) -> Result<PatBox> {
+ Ok(PatBox {
+ attrs: Vec::new(),
+ box_token: input.parse()?,
+ pat: input.parse()?,
+ })
+ }
+
+ fn pat_ident(input: ParseStream) -> Result<PatIdent> {
+ Ok(PatIdent {
+ attrs: Vec::new(),
+ by_ref: input.parse()?,
+ mutability: input.parse()?,
+ ident: input.call(Ident::parse_any)?,
+ subpat: {
+ if input.peek(Token![@]) {
+ let at_token: Token![@] = input.parse()?;
+ let subpat: Pat = input.parse()?;
+ Some((at_token, Box::new(subpat)))
+ } else {
+ None
+ }
+ },
+ })
+ }
+
+ fn pat_tuple_struct(input: ParseStream, path: Path) -> Result<PatTupleStruct> {
+ Ok(PatTupleStruct {
+ attrs: Vec::new(),
+ path,
+ pat: input.call(pat_tuple)?,
+ })
+ }
+
+ fn pat_struct(begin: ParseBuffer, input: ParseStream, path: Path) -> Result<Pat> {
+ let content;
+ let brace_token = braced!(content in input);
+
+ let mut fields = Punctuated::new();
+ let mut dot2_token = None;
+ while !content.is_empty() {
+ let attrs = content.call(Attribute::parse_outer)?;
+ if content.peek(Token![..]) {
+ dot2_token = Some(content.parse()?);
+ if !attrs.is_empty() {
+ return Ok(Pat::Verbatim(verbatim::between(begin, input)));
+ }
+ break;
+ }
+ let mut value = content.call(field_pat)?;
+ value.attrs = attrs;
+ fields.push_value(value);
+ if content.is_empty() {
+ break;
+ }
+ let punct: Token![,] = content.parse()?;
+ fields.push_punct(punct);
+ }
+
+ Ok(Pat::Struct(PatStruct {
+ attrs: Vec::new(),
+ path,
+ brace_token,
+ fields,
+ dot2_token,
+ }))
+ }
+
+ impl Member {
+ fn is_unnamed(&self) -> bool {
+ match *self {
+ Member::Named(_) => false,
+ Member::Unnamed(_) => true,
+ }
+ }
+ }
+
+ fn field_pat(input: ParseStream) -> Result<FieldPat> {
+ let boxed: Option<Token![box]> = input.parse()?;
+ let by_ref: Option<Token![ref]> = input.parse()?;
+ let mutability: Option<Token![mut]> = input.parse()?;
+ let member: Member = input.parse()?;
+
+ if boxed.is_none() && by_ref.is_none() && mutability.is_none() && input.peek(Token![:])
+ || member.is_unnamed()
+ {
+ return Ok(FieldPat {
+ attrs: Vec::new(),
+ member,
+ colon_token: input.parse()?,
+ pat: Box::new(multi_pat_with_leading_vert(input)?),
+ });
+ }
+
+ let ident = match member {
+ Member::Named(ident) => ident,
+ Member::Unnamed(_) => unreachable!(),
+ };
+
+ let mut pat = Pat::Ident(PatIdent {
+ attrs: Vec::new(),
+ by_ref,
+ mutability,
+ ident: ident.clone(),
+ subpat: None,
+ });
+
+ if let Some(boxed) = boxed {
+ pat = Pat::Box(PatBox {
+ attrs: Vec::new(),
+ box_token: boxed,
+ pat: Box::new(pat),
+ });
+ }
+
+ Ok(FieldPat {
+ attrs: Vec::new(),
+ member: Member::Named(ident),
+ colon_token: None,
+ pat: Box::new(pat),
+ })
+ }
+
+ fn pat_range(
+ input: ParseStream,
+ begin: ParseBuffer,
+ qself: Option<QSelf>,
+ path: Path,
+ ) -> Result<Pat> {
+ let limits: RangeLimits = input.parse()?;
+ let hi = input.call(pat_lit_expr)?;
+ if let Some(hi) = hi {
+ Ok(Pat::Range(PatRange {
+ attrs: Vec::new(),
+ lo: Box::new(Expr::Path(ExprPath {
+ attrs: Vec::new(),
+ qself,
+ path,
+ })),
+ limits,
+ hi,
+ }))
+ } else {
+ Ok(Pat::Verbatim(verbatim::between(begin, input)))
+ }
+ }
+
+ fn pat_range_half_open(input: ParseStream, begin: ParseBuffer) -> Result<Pat> {
+ let limits: RangeLimits = input.parse()?;
+ let hi = input.call(pat_lit_expr)?;
+ if hi.is_some() {
+ Ok(Pat::Verbatim(verbatim::between(begin, input)))
+ } else {
+ match limits {
+ RangeLimits::HalfOpen(dot2_token) => Ok(Pat::Rest(PatRest {
+ attrs: Vec::new(),
+ dot2_token,
+ })),
+ RangeLimits::Closed(_) => Err(input.error("expected range upper bound")),
+ }
+ }
+ }
+
+ fn pat_tuple(input: ParseStream) -> Result<PatTuple> {
+ let content;
+ let paren_token = parenthesized!(content in input);
+
+ let mut elems = Punctuated::new();
+ while !content.is_empty() {
+ let value = multi_pat_with_leading_vert(&content)?;
+ elems.push_value(value);
+ if content.is_empty() {
+ break;
+ }
+ let punct = content.parse()?;
+ elems.push_punct(punct);
+ }
+
+ Ok(PatTuple {
+ attrs: Vec::new(),
+ paren_token,
+ elems,
+ })
+ }
+
+ fn pat_reference(input: ParseStream) -> Result<PatReference> {
+ Ok(PatReference {
+ attrs: Vec::new(),
+ and_token: input.parse()?,
+ mutability: input.parse()?,
+ pat: input.parse()?,
+ })
+ }
+
+ fn pat_lit_or_range(input: ParseStream) -> Result<Pat> {
+ let begin = input.fork();
+ let lo = input.call(pat_lit_expr)?.unwrap();
+ if input.peek(Token![..]) {
+ let limits: RangeLimits = input.parse()?;
+ let hi = input.call(pat_lit_expr)?;
+ if let Some(hi) = hi {
+ Ok(Pat::Range(PatRange {
+ attrs: Vec::new(),
+ lo,
+ limits,
+ hi,
+ }))
+ } else {
+ Ok(Pat::Verbatim(verbatim::between(begin, input)))
+ }
+ } else if let Expr::Verbatim(verbatim) = *lo {
+ Ok(Pat::Verbatim(verbatim))
+ } else {
+ Ok(Pat::Lit(PatLit {
+ attrs: Vec::new(),
+ expr: lo,
+ }))
+ }
+ }
+
+ fn pat_lit_expr(input: ParseStream) -> Result<Option<Box<Expr>>> {
+ if input.is_empty()
+ || input.peek(Token![|])
+ || input.peek(Token![=])
+ || input.peek(Token![:]) && !input.peek(Token![::])
+ || input.peek(Token![,])
+ || input.peek(Token![;])
+ {
+ return Ok(None);
+ }
+
+ let neg: Option<Token![-]> = input.parse()?;
+
+ let lookahead = input.lookahead1();
+ let expr = if lookahead.peek(Lit) {
+ Expr::Lit(input.parse()?)
+ } else if lookahead.peek(Ident)
+ || lookahead.peek(Token![::])
+ || lookahead.peek(Token![<])
+ || lookahead.peek(Token![self])
+ || lookahead.peek(Token![Self])
+ || lookahead.peek(Token![super])
+ || lookahead.peek(Token![crate])
+ {
+ Expr::Path(input.parse()?)
+ } else if lookahead.peek(Token![const]) {
+ Expr::Verbatim(input.call(expr::parsing::expr_const)?)
+ } else {
+ return Err(lookahead.error());
+ };
+
+ Ok(Some(Box::new(if let Some(neg) = neg {
+ Expr::Unary(ExprUnary {
+ attrs: Vec::new(),
+ op: UnOp::Neg(neg),
+ expr: Box::new(expr),
+ })
+ } else {
+ expr
+ })))
+ }
+
+ fn pat_slice(input: ParseStream) -> Result<PatSlice> {
+ let content;
+ let bracket_token = bracketed!(content in input);
+
+ let mut elems = Punctuated::new();
+ while !content.is_empty() {
+ let value = multi_pat_with_leading_vert(&content)?;
+ elems.push_value(value);
+ if content.is_empty() {
+ break;
+ }
+ let punct = content.parse()?;
+ elems.push_punct(punct);
+ }
+
+ Ok(PatSlice {
+ attrs: Vec::new(),
+ bracket_token,
+ elems,
+ })
+ }
+
+ fn pat_const(input: ParseStream) -> Result<TokenStream> {
+ let begin = input.fork();
+ input.parse::<Token![const]>()?;
+
+ let content;
+ braced!(content in input);
+ content.call(Attribute::parse_inner)?;
+ content.call(Block::parse_within)?;
+
+ Ok(verbatim::between(begin, input))
+ }
+
+ pub fn multi_pat(input: ParseStream) -> Result<Pat> {
+ multi_pat_impl(input, None)
+ }
+
+ pub fn multi_pat_with_leading_vert(input: ParseStream) -> Result<Pat> {
+ let leading_vert: Option<Token![|]> = input.parse()?;
+ multi_pat_impl(input, leading_vert)
+ }
+
+ fn multi_pat_impl(input: ParseStream, leading_vert: Option<Token![|]>) -> Result<Pat> {
+ let mut pat: Pat = input.parse()?;
+ if leading_vert.is_some()
+ || input.peek(Token![|]) && !input.peek(Token![||]) && !input.peek(Token![|=])
+ {
+ let mut cases = Punctuated::new();
+ cases.push_value(pat);
+ while input.peek(Token![|]) && !input.peek(Token![||]) && !input.peek(Token![|=]) {
+ let punct = input.parse()?;
+ cases.push_punct(punct);
+ let pat: Pat = input.parse()?;
+ cases.push_value(pat);
+ }
+ pat = Pat::Or(PatOr {
+ attrs: Vec::new(),
+ leading_vert,
+ cases,
+ });
+ }
+ Ok(pat)
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use crate::attr::FilterAttrs;
+ use proc_macro2::TokenStream;
+ use quote::{ToTokens, TokenStreamExt};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatWild {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.underscore_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatIdent {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.by_ref.to_tokens(tokens);
+ self.mutability.to_tokens(tokens);
+ self.ident.to_tokens(tokens);
+ if let Some((at_token, subpat)) = &self.subpat {
+ at_token.to_tokens(tokens);
+ subpat.to_tokens(tokens);
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatStruct {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.path.to_tokens(tokens);
+ self.brace_token.surround(tokens, |tokens| {
+ self.fields.to_tokens(tokens);
+ // NOTE: We need a comma before the dot2 token if it is present.
+ if !self.fields.empty_or_trailing() && self.dot2_token.is_some() {
+ <Token![,]>::default().to_tokens(tokens);
+ }
+ self.dot2_token.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatTupleStruct {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.path.to_tokens(tokens);
+ self.pat.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatType {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.pat.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatPath {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ path::printing::print_path(tokens, &self.qself, &self.path);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatTuple {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.paren_token.surround(tokens, |tokens| {
+ self.elems.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatBox {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.box_token.to_tokens(tokens);
+ self.pat.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatReference {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.and_token.to_tokens(tokens);
+ self.mutability.to_tokens(tokens);
+ self.pat.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatRest {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.dot2_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatLit {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.expr.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatRange {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.lo.to_tokens(tokens);
+ self.limits.to_tokens(tokens);
+ self.hi.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatSlice {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.bracket_token.surround(tokens, |tokens| {
+ self.elems.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatMacro {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.mac.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PatOr {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.leading_vert.to_tokens(tokens);
+ self.cases.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for FieldPat {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ if let Some(colon_token) = &self.colon_token {
+ self.member.to_tokens(tokens);
+ colon_token.to_tokens(tokens);
+ }
+ self.pat.to_tokens(tokens);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/path.rs b/third_party/rust/syn/src/path.rs
new file mode 100644
index 0000000000..6cdb43ac54
--- /dev/null
+++ b/third_party/rust/syn/src/path.rs
@@ -0,0 +1,854 @@
+use super::*;
+use crate::punctuated::Punctuated;
+
+ast_struct! {
+ /// A path at which a named item is exported (e.g. `std::collections::HashMap`).
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Path {
+ pub leading_colon: Option<Token![::]>,
+ pub segments: Punctuated<PathSegment, Token![::]>,
+ }
+}
+
+impl<T> From<T> for Path
+where
+ T: Into<PathSegment>,
+{
+ fn from(segment: T) -> Self {
+ let mut path = Path {
+ leading_colon: None,
+ segments: Punctuated::new(),
+ };
+ path.segments.push_value(segment.into());
+ path
+ }
+}
+
+ast_struct! {
+ /// A segment of a path together with any path arguments on that segment.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct PathSegment {
+ pub ident: Ident,
+ pub arguments: PathArguments,
+ }
+}
+
+impl<T> From<T> for PathSegment
+where
+ T: Into<Ident>,
+{
+ fn from(ident: T) -> Self {
+ PathSegment {
+ ident: ident.into(),
+ arguments: PathArguments::None,
+ }
+ }
+}
+
+ast_enum! {
+ /// Angle bracketed or parenthesized arguments of a path segment.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ ///
+ /// ## Angle bracketed
+ ///
+ /// The `<'a, T>` in `std::slice::iter<'a, T>`.
+ ///
+ /// ## Parenthesized
+ ///
+ /// The `(A, B) -> C` in `Fn(A, B) -> C`.
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum PathArguments {
+ None,
+ /// The `<'a, T>` in `std::slice::iter<'a, T>`.
+ AngleBracketed(AngleBracketedGenericArguments),
+ /// The `(A, B) -> C` in `Fn(A, B) -> C`.
+ Parenthesized(ParenthesizedGenericArguments),
+ }
+}
+
+impl Default for PathArguments {
+ fn default() -> Self {
+ PathArguments::None
+ }
+}
+
+impl PathArguments {
+ pub fn is_empty(&self) -> bool {
+ match self {
+ PathArguments::None => true,
+ PathArguments::AngleBracketed(bracketed) => bracketed.args.is_empty(),
+ PathArguments::Parenthesized(_) => false,
+ }
+ }
+
+ pub fn is_none(&self) -> bool {
+ match self {
+ PathArguments::None => true,
+ PathArguments::AngleBracketed(_) | PathArguments::Parenthesized(_) => false,
+ }
+ }
+}
+
+ast_enum! {
+ /// An individual generic argument, like `'a`, `T`, or `Item = T`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum GenericArgument {
+ /// A lifetime argument.
+ Lifetime(Lifetime),
+ /// A type argument.
+ Type(Type),
+ /// A const expression. Must be inside of a block.
+ ///
+ /// NOTE: Identity expressions are represented as Type arguments, as
+ /// they are indistinguishable syntactically.
+ Const(Expr),
+ /// A binding (equality constraint) on an associated type: the `Item =
+ /// u8` in `Iterator<Item = u8>`.
+ Binding(Binding),
+ /// An associated type bound: `Iterator<Item: Display>`.
+ Constraint(Constraint),
+ }
+}
+
+ast_struct! {
+ /// Angle bracketed arguments of a path segment: the `<K, V>` in `HashMap<K,
+ /// V>`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct AngleBracketedGenericArguments {
+ pub colon2_token: Option<Token![::]>,
+ pub lt_token: Token![<],
+ pub args: Punctuated<GenericArgument, Token![,]>,
+ pub gt_token: Token![>],
+ }
+}
+
+ast_struct! {
+ /// A binding (equality constraint) on an associated type: `Item = u8`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Binding {
+ pub ident: Ident,
+ pub eq_token: Token![=],
+ pub ty: Type,
+ }
+}
+
+ast_struct! {
+ /// An associated type bound: `Iterator<Item: Display>`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Constraint {
+ pub ident: Ident,
+ pub colon_token: Token![:],
+ pub bounds: Punctuated<TypeParamBound, Token![+]>,
+ }
+}
+
+ast_struct! {
+ /// Arguments of a function path segment: the `(A, B) -> C` in `Fn(A,B) ->
+ /// C`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct ParenthesizedGenericArguments {
+ pub paren_token: token::Paren,
+ /// `(A, B)`
+ pub inputs: Punctuated<Type, Token![,]>,
+ /// `C`
+ pub output: ReturnType,
+ }
+}
+
+ast_struct! {
+ /// The explicit Self type in a qualified path: the `T` in `<T as
+ /// Display>::fmt`.
+ ///
+ /// The actual path, including the trait and the associated item, is stored
+ /// separately. The `position` field represents the index of the associated
+ /// item qualified with this Self type.
+ ///
+ /// ```text
+ /// <Vec<T> as a::b::Trait>::AssociatedItem
+ /// ^~~~~~ ~~~~~~~~~~~~~~^
+ /// ty position = 3
+ ///
+ /// <Vec<T>>::AssociatedItem
+ /// ^~~~~~ ^
+ /// ty position = 0
+ /// ```
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct QSelf {
+ pub lt_token: Token![<],
+ pub ty: Box<Type>,
+ pub position: usize,
+ pub as_token: Option<Token![as]>,
+ pub gt_token: Token![>],
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+
+ use crate::ext::IdentExt;
+ use crate::parse::{Parse, ParseStream, Result};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Path {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Self::parse_helper(input, false)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for GenericArgument {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Lifetime) && !input.peek2(Token![+]) {
+ return Ok(GenericArgument::Lifetime(input.parse()?));
+ }
+
+ if input.peek(Ident) && input.peek2(Token![=]) {
+ let ident: Ident = input.parse()?;
+ let eq_token: Token![=] = input.parse()?;
+
+ let ty = if input.peek(Lit) {
+ let begin = input.fork();
+ input.parse::<Lit>()?;
+ Type::Verbatim(verbatim::between(begin, input))
+ } else if input.peek(token::Brace) {
+ let begin = input.fork();
+
+ #[cfg(feature = "full")]
+ {
+ input.parse::<ExprBlock>()?;
+ }
+
+ #[cfg(not(feature = "full"))]
+ {
+ let content;
+ braced!(content in input);
+ content.parse::<Expr>()?;
+ }
+
+ Type::Verbatim(verbatim::between(begin, input))
+ } else {
+ input.parse()?
+ };
+
+ return Ok(GenericArgument::Binding(Binding {
+ ident,
+ eq_token,
+ ty,
+ }));
+ }
+
+ #[cfg(feature = "full")]
+ {
+ if input.peek(Ident) && input.peek2(Token![:]) && !input.peek2(Token![::]) {
+ return Ok(GenericArgument::Constraint(input.parse()?));
+ }
+ }
+
+ if input.peek(Lit) || input.peek(token::Brace) {
+ return const_argument(input).map(GenericArgument::Const);
+ }
+
+ #[cfg(feature = "full")]
+ let begin = input.fork();
+
+ let argument: Type = input.parse()?;
+
+ #[cfg(feature = "full")]
+ {
+ if match &argument {
+ Type::Path(argument)
+ if argument.qself.is_none()
+ && argument.path.leading_colon.is_none()
+ && argument.path.segments.len() == 1 =>
+ {
+ match argument.path.segments[0].arguments {
+ PathArguments::AngleBracketed(_) => true,
+ _ => false,
+ }
+ }
+ _ => false,
+ } && if input.peek(Token![=]) {
+ input.parse::<Token![=]>()?;
+ input.parse::<Type>()?;
+ true
+ } else if input.peek(Token![:]) {
+ input.parse::<Token![:]>()?;
+ input.call(constraint_bounds)?;
+ true
+ } else {
+ false
+ } {
+ let verbatim = verbatim::between(begin, input);
+ return Ok(GenericArgument::Type(Type::Verbatim(verbatim)));
+ }
+ }
+
+ Ok(GenericArgument::Type(argument))
+ }
+ }
+
+ pub fn const_argument(input: ParseStream) -> Result<Expr> {
+ let lookahead = input.lookahead1();
+
+ if input.peek(Lit) {
+ let lit = input.parse()?;
+ return Ok(Expr::Lit(lit));
+ }
+
+ #[cfg(feature = "full")]
+ {
+ if input.peek(Ident) {
+ let ident: Ident = input.parse()?;
+ return Ok(Expr::Path(ExprPath {
+ attrs: Vec::new(),
+ qself: None,
+ path: Path::from(ident),
+ }));
+ }
+ }
+
+ if input.peek(token::Brace) {
+ #[cfg(feature = "full")]
+ {
+ let block: ExprBlock = input.parse()?;
+ return Ok(Expr::Block(block));
+ }
+
+ #[cfg(not(feature = "full"))]
+ {
+ let begin = input.fork();
+ let content;
+ braced!(content in input);
+ content.parse::<Expr>()?;
+ let verbatim = verbatim::between(begin, input);
+ return Ok(Expr::Verbatim(verbatim));
+ }
+ }
+
+ Err(lookahead.error())
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for AngleBracketedGenericArguments {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(AngleBracketedGenericArguments {
+ colon2_token: input.parse()?,
+ lt_token: input.parse()?,
+ args: {
+ let mut args = Punctuated::new();
+ loop {
+ if input.peek(Token![>]) {
+ break;
+ }
+ let value = input.parse()?;
+ args.push_value(value);
+ if input.peek(Token![>]) {
+ break;
+ }
+ let punct = input.parse()?;
+ args.push_punct(punct);
+ }
+ args
+ },
+ gt_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ParenthesizedGenericArguments {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let content;
+ Ok(ParenthesizedGenericArguments {
+ paren_token: parenthesized!(content in input),
+ inputs: content.parse_terminated(Type::parse)?,
+ output: input.call(ReturnType::without_plus)?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for PathSegment {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Self::parse_helper(input, false)
+ }
+ }
+
+ impl PathSegment {
+ fn parse_helper(input: ParseStream, expr_style: bool) -> Result<Self> {
+ if input.peek(Token![super]) || input.peek(Token![self]) || input.peek(Token![crate]) {
+ let ident = input.call(Ident::parse_any)?;
+ return Ok(PathSegment::from(ident));
+ }
+
+ let ident = if input.peek(Token![Self]) {
+ input.call(Ident::parse_any)?
+ } else {
+ input.parse()?
+ };
+
+ if !expr_style && input.peek(Token![<]) && !input.peek(Token![<=])
+ || input.peek(Token![::]) && input.peek3(Token![<])
+ {
+ Ok(PathSegment {
+ ident,
+ arguments: PathArguments::AngleBracketed(input.parse()?),
+ })
+ } else {
+ Ok(PathSegment::from(ident))
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Binding {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(Binding {
+ ident: input.parse()?,
+ eq_token: input.parse()?,
+ ty: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Constraint {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(Constraint {
+ ident: input.parse()?,
+ colon_token: input.parse()?,
+ bounds: constraint_bounds(input)?,
+ })
+ }
+ }
+
+ #[cfg(feature = "full")]
+ fn constraint_bounds(input: ParseStream) -> Result<Punctuated<TypeParamBound, Token![+]>> {
+ let mut bounds = Punctuated::new();
+ loop {
+ if input.peek(Token![,]) || input.peek(Token![>]) {
+ break;
+ }
+ let value = input.parse()?;
+ bounds.push_value(value);
+ if !input.peek(Token![+]) {
+ break;
+ }
+ let punct = input.parse()?;
+ bounds.push_punct(punct);
+ }
+ Ok(bounds)
+ }
+
+ impl Path {
+ /// Parse a `Path` containing no path arguments on any of its segments.
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use syn::{Path, Result, Token};
+ /// use syn::parse::{Parse, ParseStream};
+ ///
+ /// // A simplified single `use` statement like:
+ /// //
+ /// // use std::collections::HashMap;
+ /// //
+ /// // Note that generic parameters are not allowed in a `use` statement
+ /// // so the following must not be accepted.
+ /// //
+ /// // use a::<b>::c;
+ /// struct SingleUse {
+ /// use_token: Token![use],
+ /// path: Path,
+ /// }
+ ///
+ /// impl Parse for SingleUse {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// Ok(SingleUse {
+ /// use_token: input.parse()?,
+ /// path: input.call(Path::parse_mod_style)?,
+ /// })
+ /// }
+ /// }
+ /// ```
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_mod_style(input: ParseStream) -> Result<Self> {
+ Ok(Path {
+ leading_colon: input.parse()?,
+ segments: {
+ let mut segments = Punctuated::new();
+ loop {
+ if !input.peek(Ident)
+ && !input.peek(Token![super])
+ && !input.peek(Token![self])
+ && !input.peek(Token![Self])
+ && !input.peek(Token![crate])
+ {
+ break;
+ }
+ let ident = Ident::parse_any(input)?;
+ segments.push_value(PathSegment::from(ident));
+ if !input.peek(Token![::]) {
+ break;
+ }
+ let punct = input.parse()?;
+ segments.push_punct(punct);
+ }
+ if segments.is_empty() {
+ return Err(input.error("expected path"));
+ } else if segments.trailing_punct() {
+ return Err(input.error("expected path segment"));
+ }
+ segments
+ },
+ })
+ }
+
+ /// Determines whether this is a path of length 1 equal to the given
+ /// ident.
+ ///
+ /// For them to compare equal, it must be the case that:
+ ///
+ /// - the path has no leading colon,
+ /// - the number of path segments is 1,
+ /// - the first path segment has no angle bracketed or parenthesized
+ /// path arguments, and
+ /// - the ident of the first path segment is equal to the given one.
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use syn::{Attribute, Error, Meta, NestedMeta, Result};
+ /// # use std::iter::FromIterator;
+ ///
+ /// fn get_serde_meta_items(attr: &Attribute) -> Result<Vec<NestedMeta>> {
+ /// if attr.path.is_ident("serde") {
+ /// match attr.parse_meta()? {
+ /// Meta::List(meta) => Ok(Vec::from_iter(meta.nested)),
+ /// bad => Err(Error::new_spanned(bad, "unrecognized attribute")),
+ /// }
+ /// } else {
+ /// Ok(Vec::new())
+ /// }
+ /// }
+ /// ```
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn is_ident<I: ?Sized>(&self, ident: &I) -> bool
+ where
+ Ident: PartialEq<I>,
+ {
+ match self.get_ident() {
+ Some(id) => id == ident,
+ None => false,
+ }
+ }
+
+ /// If this path consists of a single ident, returns the ident.
+ ///
+ /// A path is considered an ident if:
+ ///
+ /// - the path has no leading colon,
+ /// - the number of path segments is 1, and
+ /// - the first path segment has no angle bracketed or parenthesized
+ /// path arguments.
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn get_ident(&self) -> Option<&Ident> {
+ if self.leading_colon.is_none()
+ && self.segments.len() == 1
+ && self.segments[0].arguments.is_none()
+ {
+ Some(&self.segments[0].ident)
+ } else {
+ None
+ }
+ }
+
+ pub(crate) fn parse_helper(input: ParseStream, expr_style: bool) -> Result<Self> {
+ let mut path = Path {
+ leading_colon: input.parse()?,
+ segments: {
+ let mut segments = Punctuated::new();
+ let value = PathSegment::parse_helper(input, expr_style)?;
+ segments.push_value(value);
+ segments
+ },
+ };
+ Path::parse_rest(input, &mut path, expr_style)?;
+ Ok(path)
+ }
+
+ pub(crate) fn parse_rest(
+ input: ParseStream,
+ path: &mut Self,
+ expr_style: bool,
+ ) -> Result<()> {
+ while input.peek(Token![::]) && !input.peek3(token::Paren) {
+ let punct: Token![::] = input.parse()?;
+ path.segments.push_punct(punct);
+ let value = PathSegment::parse_helper(input, expr_style)?;
+ path.segments.push_value(value);
+ }
+ Ok(())
+ }
+ }
+
+ pub fn qpath(input: ParseStream, expr_style: bool) -> Result<(Option<QSelf>, Path)> {
+ if input.peek(Token![<]) {
+ let lt_token: Token![<] = input.parse()?;
+ let this: Type = input.parse()?;
+ let path = if input.peek(Token![as]) {
+ let as_token: Token![as] = input.parse()?;
+ let path: Path = input.parse()?;
+ Some((as_token, path))
+ } else {
+ None
+ };
+ let gt_token: Token![>] = input.parse()?;
+ let colon2_token: Token![::] = input.parse()?;
+ let mut rest = Punctuated::new();
+ loop {
+ let path = PathSegment::parse_helper(input, expr_style)?;
+ rest.push_value(path);
+ if !input.peek(Token![::]) {
+ break;
+ }
+ let punct: Token![::] = input.parse()?;
+ rest.push_punct(punct);
+ }
+ let (position, as_token, path) = match path {
+ Some((as_token, mut path)) => {
+ let pos = path.segments.len();
+ path.segments.push_punct(colon2_token);
+ path.segments.extend(rest.into_pairs());
+ (pos, Some(as_token), path)
+ }
+ None => {
+ let path = Path {
+ leading_colon: Some(colon2_token),
+ segments: rest,
+ };
+ (0, None, path)
+ }
+ };
+ let qself = QSelf {
+ lt_token,
+ ty: Box::new(this),
+ position,
+ as_token,
+ gt_token,
+ };
+ Ok((Some(qself), path))
+ } else {
+ let path = Path::parse_helper(input, expr_style)?;
+ Ok((None, path))
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+pub(crate) mod printing {
+ use super::*;
+ use crate::print::TokensOrDefault;
+ use proc_macro2::TokenStream;
+ use quote::ToTokens;
+ use std::cmp;
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Path {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.leading_colon.to_tokens(tokens);
+ self.segments.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PathSegment {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.ident.to_tokens(tokens);
+ self.arguments.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for PathArguments {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ PathArguments::None => {}
+ PathArguments::AngleBracketed(arguments) => {
+ arguments.to_tokens(tokens);
+ }
+ PathArguments::Parenthesized(arguments) => {
+ arguments.to_tokens(tokens);
+ }
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for GenericArgument {
+ #[allow(clippy::match_same_arms)]
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ GenericArgument::Lifetime(lt) => lt.to_tokens(tokens),
+ GenericArgument::Type(ty) => ty.to_tokens(tokens),
+ GenericArgument::Const(e) => match *e {
+ Expr::Lit(_) => e.to_tokens(tokens),
+
+ // NOTE: We should probably support parsing blocks with only
+ // expressions in them without the full feature for const
+ // generics.
+ #[cfg(feature = "full")]
+ Expr::Block(_) => e.to_tokens(tokens),
+
+ // ERROR CORRECTION: Add braces to make sure that the
+ // generated code is valid.
+ _ => token::Brace::default().surround(tokens, |tokens| {
+ e.to_tokens(tokens);
+ }),
+ },
+ GenericArgument::Binding(tb) => tb.to_tokens(tokens),
+ GenericArgument::Constraint(tc) => tc.to_tokens(tokens),
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for AngleBracketedGenericArguments {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.colon2_token.to_tokens(tokens);
+ self.lt_token.to_tokens(tokens);
+
+ // Print lifetimes before types/consts/bindings, regardless of their
+ // order in self.args.
+ let mut trailing_or_empty = true;
+ for param in self.args.pairs() {
+ match **param.value() {
+ GenericArgument::Lifetime(_) => {
+ param.to_tokens(tokens);
+ trailing_or_empty = param.punct().is_some();
+ }
+ GenericArgument::Type(_)
+ | GenericArgument::Const(_)
+ | GenericArgument::Binding(_)
+ | GenericArgument::Constraint(_) => {}
+ }
+ }
+ for param in self.args.pairs() {
+ match **param.value() {
+ GenericArgument::Type(_)
+ | GenericArgument::Const(_)
+ | GenericArgument::Binding(_)
+ | GenericArgument::Constraint(_) => {
+ if !trailing_or_empty {
+ <Token![,]>::default().to_tokens(tokens);
+ }
+ param.to_tokens(tokens);
+ trailing_or_empty = param.punct().is_some();
+ }
+ GenericArgument::Lifetime(_) => {}
+ }
+ }
+
+ self.gt_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Binding {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.ident.to_tokens(tokens);
+ self.eq_token.to_tokens(tokens);
+ self.ty.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Constraint {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.ident.to_tokens(tokens);
+ self.colon_token.to_tokens(tokens);
+ self.bounds.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ParenthesizedGenericArguments {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.paren_token.surround(tokens, |tokens| {
+ self.inputs.to_tokens(tokens);
+ });
+ self.output.to_tokens(tokens);
+ }
+ }
+
+ pub(crate) fn print_path(tokens: &mut TokenStream, qself: &Option<QSelf>, path: &Path) {
+ let qself = match qself {
+ Some(qself) => qself,
+ None => {
+ path.to_tokens(tokens);
+ return;
+ }
+ };
+ qself.lt_token.to_tokens(tokens);
+ qself.ty.to_tokens(tokens);
+
+ let pos = cmp::min(qself.position, path.segments.len());
+ let mut segments = path.segments.pairs();
+ if pos > 0 {
+ TokensOrDefault(&qself.as_token).to_tokens(tokens);
+ path.leading_colon.to_tokens(tokens);
+ for (i, segment) in segments.by_ref().take(pos).enumerate() {
+ if i + 1 == pos {
+ segment.value().to_tokens(tokens);
+ qself.gt_token.to_tokens(tokens);
+ segment.punct().to_tokens(tokens);
+ } else {
+ segment.to_tokens(tokens);
+ }
+ }
+ } else {
+ qself.gt_token.to_tokens(tokens);
+ path.leading_colon.to_tokens(tokens);
+ }
+ for segment in segments {
+ segment.to_tokens(tokens);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/print.rs b/third_party/rust/syn/src/print.rs
new file mode 100644
index 0000000000..da4e07e3b3
--- /dev/null
+++ b/third_party/rust/syn/src/print.rs
@@ -0,0 +1,16 @@
+use proc_macro2::TokenStream;
+use quote::ToTokens;
+
+pub struct TokensOrDefault<'a, T: 'a>(pub &'a Option<T>);
+
+impl<'a, T> ToTokens for TokensOrDefault<'a, T>
+where
+ T: ToTokens + Default,
+{
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self.0 {
+ Some(t) => t.to_tokens(tokens),
+ None => T::default().to_tokens(tokens),
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/punctuated.rs b/third_party/rust/syn/src/punctuated.rs
new file mode 100644
index 0000000000..b7d0185e80
--- /dev/null
+++ b/third_party/rust/syn/src/punctuated.rs
@@ -0,0 +1,1087 @@
+//! A punctuated sequence of syntax tree nodes separated by punctuation.
+//!
+//! Lots of things in Rust are punctuated sequences.
+//!
+//! - The fields of a struct are `Punctuated<Field, Token![,]>`.
+//! - The segments of a path are `Punctuated<PathSegment, Token![::]>`.
+//! - The bounds on a generic parameter are `Punctuated<TypeParamBound,
+//! Token![+]>`.
+//! - The arguments to a function call are `Punctuated<Expr, Token![,]>`.
+//!
+//! This module provides a common representation for these punctuated sequences
+//! in the form of the [`Punctuated<T, P>`] type. We store a vector of pairs of
+//! syntax tree node + punctuation, where every node in the sequence is followed
+//! by punctuation except for possibly the final one.
+//!
+//! [`Punctuated<T, P>`]: Punctuated
+//!
+//! ```text
+//! a_function_call(arg1, arg2, arg3);
+//! ~~~~^ ~~~~^ ~~~~
+//! ```
+
+#[cfg(feature = "extra-traits")]
+use std::fmt::{self, Debug};
+#[cfg(feature = "extra-traits")]
+use std::hash::{Hash, Hasher};
+#[cfg(any(feature = "full", feature = "derive"))]
+use std::iter;
+use std::iter::FromIterator;
+use std::ops::{Index, IndexMut};
+use std::option;
+use std::slice;
+use std::vec;
+
+use crate::drops::{NoDrop, TrivialDrop};
+#[cfg(feature = "parsing")]
+use crate::parse::{Parse, ParseStream, Result};
+#[cfg(feature = "parsing")]
+use crate::token::Token;
+
+/// A punctuated sequence of syntax tree nodes of type `T` separated by
+/// punctuation of type `P`.
+///
+/// Refer to the [module documentation] for details about punctuated sequences.
+///
+/// [module documentation]: self
+pub struct Punctuated<T, P> {
+ inner: Vec<(T, P)>,
+ last: Option<Box<T>>,
+}
+
+impl<T, P> Punctuated<T, P> {
+ /// Creates an empty punctuated sequence.
+ #[cfg(not(syn_no_const_vec_new))]
+ pub const fn new() -> Self {
+ Punctuated {
+ inner: Vec::new(),
+ last: None,
+ }
+ }
+
+ /// Creates an empty punctuated sequence.
+ #[cfg(syn_no_const_vec_new)]
+ pub fn new() -> Self {
+ Punctuated {
+ inner: Vec::new(),
+ last: None,
+ }
+ }
+
+ /// Determines whether this punctuated sequence is empty, meaning it
+ /// contains no syntax tree nodes or punctuation.
+ pub fn is_empty(&self) -> bool {
+ self.inner.len() == 0 && self.last.is_none()
+ }
+
+ /// Returns the number of syntax tree nodes in this punctuated sequence.
+ ///
+ /// This is the number of nodes of type `T`, not counting the punctuation of
+ /// type `P`.
+ pub fn len(&self) -> usize {
+ self.inner.len() + if self.last.is_some() { 1 } else { 0 }
+ }
+
+ /// Borrows the first element in this sequence.
+ pub fn first(&self) -> Option<&T> {
+ self.iter().next()
+ }
+
+ /// Mutably borrows the first element in this sequence.
+ pub fn first_mut(&mut self) -> Option<&mut T> {
+ self.iter_mut().next()
+ }
+
+ /// Borrows the last element in this sequence.
+ pub fn last(&self) -> Option<&T> {
+ self.iter().next_back()
+ }
+
+ /// Mutably borrows the last element in this sequence.
+ pub fn last_mut(&mut self) -> Option<&mut T> {
+ self.iter_mut().next_back()
+ }
+
+ /// Returns an iterator over borrowed syntax tree nodes of type `&T`.
+ pub fn iter(&self) -> Iter<T> {
+ Iter {
+ inner: Box::new(NoDrop::new(PrivateIter {
+ inner: self.inner.iter(),
+ last: self.last.as_ref().map(Box::as_ref).into_iter(),
+ })),
+ }
+ }
+
+ /// Returns an iterator over mutably borrowed syntax tree nodes of type
+ /// `&mut T`.
+ pub fn iter_mut(&mut self) -> IterMut<T> {
+ IterMut {
+ inner: Box::new(NoDrop::new(PrivateIterMut {
+ inner: self.inner.iter_mut(),
+ last: self.last.as_mut().map(Box::as_mut).into_iter(),
+ })),
+ }
+ }
+
+ /// Returns an iterator over the contents of this sequence as borrowed
+ /// punctuated pairs.
+ pub fn pairs(&self) -> Pairs<T, P> {
+ Pairs {
+ inner: self.inner.iter(),
+ last: self.last.as_ref().map(Box::as_ref).into_iter(),
+ }
+ }
+
+ /// Returns an iterator over the contents of this sequence as mutably
+ /// borrowed punctuated pairs.
+ pub fn pairs_mut(&mut self) -> PairsMut<T, P> {
+ PairsMut {
+ inner: self.inner.iter_mut(),
+ last: self.last.as_mut().map(Box::as_mut).into_iter(),
+ }
+ }
+
+ /// Returns an iterator over the contents of this sequence as owned
+ /// punctuated pairs.
+ pub fn into_pairs(self) -> IntoPairs<T, P> {
+ IntoPairs {
+ inner: self.inner.into_iter(),
+ last: self.last.map(|t| *t).into_iter(),
+ }
+ }
+
+ /// Appends a syntax tree node onto the end of this punctuated sequence. The
+ /// sequence must previously have a trailing punctuation.
+ ///
+ /// Use [`push`] instead if the punctuated sequence may or may not already
+ /// have trailing punctuation.
+ ///
+ /// [`push`]: Punctuated::push
+ ///
+ /// # Panics
+ ///
+ /// Panics if the sequence does not already have a trailing punctuation when
+ /// this method is called.
+ pub fn push_value(&mut self, value: T) {
+ assert!(
+ self.empty_or_trailing(),
+ "Punctuated::push_value: cannot push value if Punctuated is missing trailing punctuation",
+ );
+
+ self.last = Some(Box::new(value));
+ }
+
+ /// Appends a trailing punctuation onto the end of this punctuated sequence.
+ /// The sequence must be non-empty and must not already have trailing
+ /// punctuation.
+ ///
+ /// # Panics
+ ///
+ /// Panics if the sequence is empty or already has a trailing punctuation.
+ pub fn push_punct(&mut self, punctuation: P) {
+ assert!(
+ self.last.is_some(),
+ "Punctuated::push_punct: cannot push punctuation if Punctuated is empty or already has trailing punctuation",
+ );
+
+ let last = self.last.take().unwrap();
+ self.inner.push((*last, punctuation));
+ }
+
+ /// Removes the last punctuated pair from this sequence, or `None` if the
+ /// sequence is empty.
+ pub fn pop(&mut self) -> Option<Pair<T, P>> {
+ if self.last.is_some() {
+ self.last.take().map(|t| Pair::End(*t))
+ } else {
+ self.inner.pop().map(|(t, p)| Pair::Punctuated(t, p))
+ }
+ }
+
+ /// Determines whether this punctuated sequence ends with a trailing
+ /// punctuation.
+ pub fn trailing_punct(&self) -> bool {
+ self.last.is_none() && !self.is_empty()
+ }
+
+ /// Returns true if either this `Punctuated` is empty, or it has a trailing
+ /// punctuation.
+ ///
+ /// Equivalent to `punctuated.is_empty() || punctuated.trailing_punct()`.
+ pub fn empty_or_trailing(&self) -> bool {
+ self.last.is_none()
+ }
+
+ /// Appends a syntax tree node onto the end of this punctuated sequence.
+ ///
+ /// If there is not a trailing punctuation in this sequence when this method
+ /// is called, the default value of punctuation type `P` is inserted before
+ /// the given value of type `T`.
+ pub fn push(&mut self, value: T)
+ where
+ P: Default,
+ {
+ if !self.empty_or_trailing() {
+ self.push_punct(Default::default());
+ }
+ self.push_value(value);
+ }
+
+ /// Inserts an element at position `index`.
+ ///
+ /// # Panics
+ ///
+ /// Panics if `index` is greater than the number of elements previously in
+ /// this punctuated sequence.
+ pub fn insert(&mut self, index: usize, value: T)
+ where
+ P: Default,
+ {
+ assert!(
+ index <= self.len(),
+ "Punctuated::insert: index out of range",
+ );
+
+ if index == self.len() {
+ self.push(value);
+ } else {
+ self.inner.insert(index, (value, Default::default()));
+ }
+ }
+
+ /// Clears the sequence of all values and punctuation, making it empty.
+ pub fn clear(&mut self) {
+ self.inner.clear();
+ self.last = None;
+ }
+
+ /// Parses zero or more occurrences of `T` separated by punctuation of type
+ /// `P`, with optional trailing punctuation.
+ ///
+ /// Parsing continues until the end of this parse stream. The entire content
+ /// of this parse stream must consist of `T` and `P`.
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_terminated(input: ParseStream) -> Result<Self>
+ where
+ T: Parse,
+ P: Parse,
+ {
+ Self::parse_terminated_with(input, T::parse)
+ }
+
+ /// Parses zero or more occurrences of `T` using the given parse function,
+ /// separated by punctuation of type `P`, with optional trailing
+ /// punctuation.
+ ///
+ /// Like [`parse_terminated`], the entire content of this stream is expected
+ /// to be parsed.
+ ///
+ /// [`parse_terminated`]: Punctuated::parse_terminated
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_terminated_with(
+ input: ParseStream,
+ parser: fn(ParseStream) -> Result<T>,
+ ) -> Result<Self>
+ where
+ P: Parse,
+ {
+ let mut punctuated = Punctuated::new();
+
+ loop {
+ if input.is_empty() {
+ break;
+ }
+ let value = parser(input)?;
+ punctuated.push_value(value);
+ if input.is_empty() {
+ break;
+ }
+ let punct = input.parse()?;
+ punctuated.push_punct(punct);
+ }
+
+ Ok(punctuated)
+ }
+
+ /// Parses one or more occurrences of `T` separated by punctuation of type
+ /// `P`, not accepting trailing punctuation.
+ ///
+ /// Parsing continues as long as punctuation `P` is present at the head of
+ /// the stream. This method returns upon parsing a `T` and observing that it
+ /// is not followed by a `P`, even if there are remaining tokens in the
+ /// stream.
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_separated_nonempty(input: ParseStream) -> Result<Self>
+ where
+ T: Parse,
+ P: Token + Parse,
+ {
+ Self::parse_separated_nonempty_with(input, T::parse)
+ }
+
+ /// Parses one or more occurrences of `T` using the given parse function,
+ /// separated by punctuation of type `P`, not accepting trailing
+ /// punctuation.
+ ///
+ /// Like [`parse_separated_nonempty`], may complete early without parsing
+ /// the entire content of this stream.
+ ///
+ /// [`parse_separated_nonempty`]: Punctuated::parse_separated_nonempty
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_separated_nonempty_with(
+ input: ParseStream,
+ parser: fn(ParseStream) -> Result<T>,
+ ) -> Result<Self>
+ where
+ P: Token + Parse,
+ {
+ let mut punctuated = Punctuated::new();
+
+ loop {
+ let value = parser(input)?;
+ punctuated.push_value(value);
+ if !P::peek(input.cursor()) {
+ break;
+ }
+ let punct = input.parse()?;
+ punctuated.push_punct(punct);
+ }
+
+ Ok(punctuated)
+ }
+}
+
+#[cfg(feature = "clone-impls")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl<T, P> Clone for Punctuated<T, P>
+where
+ T: Clone,
+ P: Clone,
+{
+ fn clone(&self) -> Self {
+ Punctuated {
+ inner: self.inner.clone(),
+ last: self.last.clone(),
+ }
+ }
+}
+
+#[cfg(feature = "extra-traits")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl<T, P> Eq for Punctuated<T, P>
+where
+ T: Eq,
+ P: Eq,
+{
+}
+
+#[cfg(feature = "extra-traits")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl<T, P> PartialEq for Punctuated<T, P>
+where
+ T: PartialEq,
+ P: PartialEq,
+{
+ fn eq(&self, other: &Self) -> bool {
+ let Punctuated { inner, last } = self;
+ *inner == other.inner && *last == other.last
+ }
+}
+
+#[cfg(feature = "extra-traits")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl<T, P> Hash for Punctuated<T, P>
+where
+ T: Hash,
+ P: Hash,
+{
+ fn hash<H: Hasher>(&self, state: &mut H) {
+ let Punctuated { inner, last } = self;
+ inner.hash(state);
+ last.hash(state);
+ }
+}
+
+#[cfg(feature = "extra-traits")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl<T: Debug, P: Debug> Debug for Punctuated<T, P> {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ let mut list = f.debug_list();
+ for (t, p) in &self.inner {
+ list.entry(t);
+ list.entry(p);
+ }
+ if let Some(last) = &self.last {
+ list.entry(last);
+ }
+ list.finish()
+ }
+}
+
+impl<T, P> FromIterator<T> for Punctuated<T, P>
+where
+ P: Default,
+{
+ fn from_iter<I: IntoIterator<Item = T>>(i: I) -> Self {
+ let mut ret = Punctuated::new();
+ ret.extend(i);
+ ret
+ }
+}
+
+impl<T, P> Extend<T> for Punctuated<T, P>
+where
+ P: Default,
+{
+ fn extend<I: IntoIterator<Item = T>>(&mut self, i: I) {
+ for value in i {
+ self.push(value);
+ }
+ }
+}
+
+impl<T, P> FromIterator<Pair<T, P>> for Punctuated<T, P> {
+ fn from_iter<I: IntoIterator<Item = Pair<T, P>>>(i: I) -> Self {
+ let mut ret = Punctuated::new();
+ ret.extend(i);
+ ret
+ }
+}
+
+impl<T, P> Extend<Pair<T, P>> for Punctuated<T, P> {
+ fn extend<I: IntoIterator<Item = Pair<T, P>>>(&mut self, i: I) {
+ assert!(
+ self.empty_or_trailing(),
+ "Punctuated::extend: Punctuated is not empty or does not have a trailing punctuation",
+ );
+
+ let mut nomore = false;
+ for pair in i {
+ if nomore {
+ panic!("Punctuated extended with items after a Pair::End");
+ }
+ match pair {
+ Pair::Punctuated(a, b) => self.inner.push((a, b)),
+ Pair::End(a) => {
+ self.last = Some(Box::new(a));
+ nomore = true;
+ }
+ }
+ }
+ }
+}
+
+impl<T, P> IntoIterator for Punctuated<T, P> {
+ type Item = T;
+ type IntoIter = IntoIter<T>;
+
+ fn into_iter(self) -> Self::IntoIter {
+ let mut elements = Vec::with_capacity(self.len());
+ elements.extend(self.inner.into_iter().map(|pair| pair.0));
+ elements.extend(self.last.map(|t| *t));
+
+ IntoIter {
+ inner: elements.into_iter(),
+ }
+ }
+}
+
+impl<'a, T, P> IntoIterator for &'a Punctuated<T, P> {
+ type Item = &'a T;
+ type IntoIter = Iter<'a, T>;
+
+ fn into_iter(self) -> Self::IntoIter {
+ Punctuated::iter(self)
+ }
+}
+
+impl<'a, T, P> IntoIterator for &'a mut Punctuated<T, P> {
+ type Item = &'a mut T;
+ type IntoIter = IterMut<'a, T>;
+
+ fn into_iter(self) -> Self::IntoIter {
+ Punctuated::iter_mut(self)
+ }
+}
+
+impl<T, P> Default for Punctuated<T, P> {
+ fn default() -> Self {
+ Punctuated::new()
+ }
+}
+
+/// An iterator over borrowed pairs of type `Pair<&T, &P>`.
+///
+/// Refer to the [module documentation] for details about punctuated sequences.
+///
+/// [module documentation]: self
+pub struct Pairs<'a, T: 'a, P: 'a> {
+ inner: slice::Iter<'a, (T, P)>,
+ last: option::IntoIter<&'a T>,
+}
+
+impl<'a, T, P> Iterator for Pairs<'a, T, P> {
+ type Item = Pair<&'a T, &'a P>;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ self.inner
+ .next()
+ .map(|(t, p)| Pair::Punctuated(t, p))
+ .or_else(|| self.last.next().map(Pair::End))
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ (self.len(), Some(self.len()))
+ }
+}
+
+impl<'a, T, P> DoubleEndedIterator for Pairs<'a, T, P> {
+ fn next_back(&mut self) -> Option<Self::Item> {
+ self.last
+ .next()
+ .map(Pair::End)
+ .or_else(|| self.inner.next_back().map(|(t, p)| Pair::Punctuated(t, p)))
+ }
+}
+
+impl<'a, T, P> ExactSizeIterator for Pairs<'a, T, P> {
+ fn len(&self) -> usize {
+ self.inner.len() + self.last.len()
+ }
+}
+
+// No Clone bound on T or P.
+impl<'a, T, P> Clone for Pairs<'a, T, P> {
+ fn clone(&self) -> Self {
+ Pairs {
+ inner: self.inner.clone(),
+ last: self.last.clone(),
+ }
+ }
+}
+
+/// An iterator over mutably borrowed pairs of type `Pair<&mut T, &mut P>`.
+///
+/// Refer to the [module documentation] for details about punctuated sequences.
+///
+/// [module documentation]: self
+pub struct PairsMut<'a, T: 'a, P: 'a> {
+ inner: slice::IterMut<'a, (T, P)>,
+ last: option::IntoIter<&'a mut T>,
+}
+
+impl<'a, T, P> Iterator for PairsMut<'a, T, P> {
+ type Item = Pair<&'a mut T, &'a mut P>;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ self.inner
+ .next()
+ .map(|(t, p)| Pair::Punctuated(t, p))
+ .or_else(|| self.last.next().map(Pair::End))
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ (self.len(), Some(self.len()))
+ }
+}
+
+impl<'a, T, P> DoubleEndedIterator for PairsMut<'a, T, P> {
+ fn next_back(&mut self) -> Option<Self::Item> {
+ self.last
+ .next()
+ .map(Pair::End)
+ .or_else(|| self.inner.next_back().map(|(t, p)| Pair::Punctuated(t, p)))
+ }
+}
+
+impl<'a, T, P> ExactSizeIterator for PairsMut<'a, T, P> {
+ fn len(&self) -> usize {
+ self.inner.len() + self.last.len()
+ }
+}
+
+/// An iterator over owned pairs of type `Pair<T, P>`.
+///
+/// Refer to the [module documentation] for details about punctuated sequences.
+///
+/// [module documentation]: self
+pub struct IntoPairs<T, P> {
+ inner: vec::IntoIter<(T, P)>,
+ last: option::IntoIter<T>,
+}
+
+impl<T, P> Iterator for IntoPairs<T, P> {
+ type Item = Pair<T, P>;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ self.inner
+ .next()
+ .map(|(t, p)| Pair::Punctuated(t, p))
+ .or_else(|| self.last.next().map(Pair::End))
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ (self.len(), Some(self.len()))
+ }
+}
+
+impl<T, P> DoubleEndedIterator for IntoPairs<T, P> {
+ fn next_back(&mut self) -> Option<Self::Item> {
+ self.last
+ .next()
+ .map(Pair::End)
+ .or_else(|| self.inner.next_back().map(|(t, p)| Pair::Punctuated(t, p)))
+ }
+}
+
+impl<T, P> ExactSizeIterator for IntoPairs<T, P> {
+ fn len(&self) -> usize {
+ self.inner.len() + self.last.len()
+ }
+}
+
+impl<T, P> Clone for IntoPairs<T, P>
+where
+ T: Clone,
+ P: Clone,
+{
+ fn clone(&self) -> Self {
+ IntoPairs {
+ inner: self.inner.clone(),
+ last: self.last.clone(),
+ }
+ }
+}
+
+/// An iterator over owned values of type `T`.
+///
+/// Refer to the [module documentation] for details about punctuated sequences.
+///
+/// [module documentation]: self
+pub struct IntoIter<T> {
+ inner: vec::IntoIter<T>,
+}
+
+impl<T> Iterator for IntoIter<T> {
+ type Item = T;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ self.inner.next()
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ (self.len(), Some(self.len()))
+ }
+}
+
+impl<T> DoubleEndedIterator for IntoIter<T> {
+ fn next_back(&mut self) -> Option<Self::Item> {
+ self.inner.next_back()
+ }
+}
+
+impl<T> ExactSizeIterator for IntoIter<T> {
+ fn len(&self) -> usize {
+ self.inner.len()
+ }
+}
+
+impl<T> Clone for IntoIter<T>
+where
+ T: Clone,
+{
+ fn clone(&self) -> Self {
+ IntoIter {
+ inner: self.inner.clone(),
+ }
+ }
+}
+
+/// An iterator over borrowed values of type `&T`.
+///
+/// Refer to the [module documentation] for details about punctuated sequences.
+///
+/// [module documentation]: self
+pub struct Iter<'a, T: 'a> {
+ // The `Item = &'a T` needs to be specified to support rustc 1.31 and older.
+ // On modern compilers we would be able to write just IterTrait<'a, T> where
+ // Item can be inferred unambiguously from the supertrait.
+ inner: Box<NoDrop<dyn IterTrait<'a, T, Item = &'a T> + 'a>>,
+}
+
+trait IterTrait<'a, T: 'a>:
+ DoubleEndedIterator<Item = &'a T> + ExactSizeIterator<Item = &'a T>
+{
+ fn clone_box(&self) -> Box<NoDrop<dyn IterTrait<'a, T, Item = &'a T> + 'a>>;
+}
+
+struct PrivateIter<'a, T: 'a, P: 'a> {
+ inner: slice::Iter<'a, (T, P)>,
+ last: option::IntoIter<&'a T>,
+}
+
+impl<'a, T, P> TrivialDrop for PrivateIter<'a, T, P>
+where
+ slice::Iter<'a, (T, P)>: TrivialDrop,
+ option::IntoIter<&'a T>: TrivialDrop,
+{
+}
+
+#[cfg(any(feature = "full", feature = "derive"))]
+pub(crate) fn empty_punctuated_iter<'a, T>() -> Iter<'a, T> {
+ Iter {
+ inner: Box::new(NoDrop::new(iter::empty())),
+ }
+}
+
+// No Clone bound on T.
+impl<'a, T> Clone for Iter<'a, T> {
+ fn clone(&self) -> Self {
+ Iter {
+ inner: self.inner.clone_box(),
+ }
+ }
+}
+
+impl<'a, T> Iterator for Iter<'a, T> {
+ type Item = &'a T;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ self.inner.next()
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ (self.len(), Some(self.len()))
+ }
+}
+
+impl<'a, T> DoubleEndedIterator for Iter<'a, T> {
+ fn next_back(&mut self) -> Option<Self::Item> {
+ self.inner.next_back()
+ }
+}
+
+impl<'a, T> ExactSizeIterator for Iter<'a, T> {
+ fn len(&self) -> usize {
+ self.inner.len()
+ }
+}
+
+impl<'a, T, P> Iterator for PrivateIter<'a, T, P> {
+ type Item = &'a T;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ self.inner
+ .next()
+ .map(|pair| &pair.0)
+ .or_else(|| self.last.next())
+ }
+}
+
+impl<'a, T, P> DoubleEndedIterator for PrivateIter<'a, T, P> {
+ fn next_back(&mut self) -> Option<Self::Item> {
+ self.last
+ .next()
+ .or_else(|| self.inner.next_back().map(|pair| &pair.0))
+ }
+}
+
+impl<'a, T, P> ExactSizeIterator for PrivateIter<'a, T, P> {
+ fn len(&self) -> usize {
+ self.inner.len() + self.last.len()
+ }
+}
+
+// No Clone bound on T or P.
+impl<'a, T, P> Clone for PrivateIter<'a, T, P> {
+ fn clone(&self) -> Self {
+ PrivateIter {
+ inner: self.inner.clone(),
+ last: self.last.clone(),
+ }
+ }
+}
+
+impl<'a, T, I> IterTrait<'a, T> for I
+where
+ T: 'a,
+ I: DoubleEndedIterator<Item = &'a T>
+ + ExactSizeIterator<Item = &'a T>
+ + Clone
+ + TrivialDrop
+ + 'a,
+{
+ fn clone_box(&self) -> Box<NoDrop<dyn IterTrait<'a, T, Item = &'a T> + 'a>> {
+ Box::new(NoDrop::new(self.clone()))
+ }
+}
+
+/// An iterator over mutably borrowed values of type `&mut T`.
+///
+/// Refer to the [module documentation] for details about punctuated sequences.
+///
+/// [module documentation]: self
+pub struct IterMut<'a, T: 'a> {
+ inner: Box<NoDrop<dyn IterMutTrait<'a, T, Item = &'a mut T> + 'a>>,
+}
+
+trait IterMutTrait<'a, T: 'a>:
+ DoubleEndedIterator<Item = &'a mut T> + ExactSizeIterator<Item = &'a mut T>
+{
+}
+
+struct PrivateIterMut<'a, T: 'a, P: 'a> {
+ inner: slice::IterMut<'a, (T, P)>,
+ last: option::IntoIter<&'a mut T>,
+}
+
+impl<'a, T, P> TrivialDrop for PrivateIterMut<'a, T, P>
+where
+ slice::IterMut<'a, (T, P)>: TrivialDrop,
+ option::IntoIter<&'a mut T>: TrivialDrop,
+{
+}
+
+#[cfg(any(feature = "full", feature = "derive"))]
+pub(crate) fn empty_punctuated_iter_mut<'a, T>() -> IterMut<'a, T> {
+ IterMut {
+ inner: Box::new(NoDrop::new(iter::empty())),
+ }
+}
+
+impl<'a, T> Iterator for IterMut<'a, T> {
+ type Item = &'a mut T;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ self.inner.next()
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ (self.len(), Some(self.len()))
+ }
+}
+
+impl<'a, T> DoubleEndedIterator for IterMut<'a, T> {
+ fn next_back(&mut self) -> Option<Self::Item> {
+ self.inner.next_back()
+ }
+}
+
+impl<'a, T> ExactSizeIterator for IterMut<'a, T> {
+ fn len(&self) -> usize {
+ self.inner.len()
+ }
+}
+
+impl<'a, T, P> Iterator for PrivateIterMut<'a, T, P> {
+ type Item = &'a mut T;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ self.inner
+ .next()
+ .map(|pair| &mut pair.0)
+ .or_else(|| self.last.next())
+ }
+}
+
+impl<'a, T, P> DoubleEndedIterator for PrivateIterMut<'a, T, P> {
+ fn next_back(&mut self) -> Option<Self::Item> {
+ self.last
+ .next()
+ .or_else(|| self.inner.next_back().map(|pair| &mut pair.0))
+ }
+}
+
+impl<'a, T, P> ExactSizeIterator for PrivateIterMut<'a, T, P> {
+ fn len(&self) -> usize {
+ self.inner.len() + self.last.len()
+ }
+}
+
+impl<'a, T, I> IterMutTrait<'a, T> for I
+where
+ T: 'a,
+ I: DoubleEndedIterator<Item = &'a mut T> + ExactSizeIterator<Item = &'a mut T> + 'a,
+{
+}
+
+/// A single syntax tree node of type `T` followed by its trailing punctuation
+/// of type `P` if any.
+///
+/// Refer to the [module documentation] for details about punctuated sequences.
+///
+/// [module documentation]: self
+pub enum Pair<T, P> {
+ Punctuated(T, P),
+ End(T),
+}
+
+impl<T, P> Pair<T, P> {
+ /// Extracts the syntax tree node from this punctuated pair, discarding the
+ /// following punctuation.
+ pub fn into_value(self) -> T {
+ match self {
+ Pair::Punctuated(t, _) | Pair::End(t) => t,
+ }
+ }
+
+ /// Borrows the syntax tree node from this punctuated pair.
+ pub fn value(&self) -> &T {
+ match self {
+ Pair::Punctuated(t, _) | Pair::End(t) => t,
+ }
+ }
+
+ /// Mutably borrows the syntax tree node from this punctuated pair.
+ pub fn value_mut(&mut self) -> &mut T {
+ match self {
+ Pair::Punctuated(t, _) | Pair::End(t) => t,
+ }
+ }
+
+ /// Borrows the punctuation from this punctuated pair, unless this pair is
+ /// the final one and there is no trailing punctuation.
+ pub fn punct(&self) -> Option<&P> {
+ match self {
+ Pair::Punctuated(_, p) => Some(p),
+ Pair::End(_) => None,
+ }
+ }
+
+ /// Mutably borrows the punctuation from this punctuated pair, unless the
+ /// pair is the final one and there is no trailing punctuation.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// # use proc_macro2::Span;
+ /// # use syn::punctuated::Punctuated;
+ /// # use syn::{parse_quote, Token, TypeParamBound};
+ /// #
+ /// # let mut punctuated = Punctuated::<TypeParamBound, Token![+]>::new();
+ /// # let span = Span::call_site();
+ /// #
+ /// punctuated.insert(0, parse_quote!('lifetime));
+ /// if let Some(punct) = punctuated.pairs_mut().next().unwrap().punct_mut() {
+ /// punct.span = span;
+ /// }
+ /// ```
+ pub fn punct_mut(&mut self) -> Option<&mut P> {
+ match self {
+ Pair::Punctuated(_, p) => Some(p),
+ Pair::End(_) => None,
+ }
+ }
+
+ /// Creates a punctuated pair out of a syntax tree node and an optional
+ /// following punctuation.
+ pub fn new(t: T, p: Option<P>) -> Self {
+ match p {
+ Some(p) => Pair::Punctuated(t, p),
+ None => Pair::End(t),
+ }
+ }
+
+ /// Produces this punctuated pair as a tuple of syntax tree node and
+ /// optional following punctuation.
+ pub fn into_tuple(self) -> (T, Option<P>) {
+ match self {
+ Pair::Punctuated(t, p) => (t, Some(p)),
+ Pair::End(t) => (t, None),
+ }
+ }
+}
+
+#[cfg(feature = "clone-impls")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl<T, P> Clone for Pair<T, P>
+where
+ T: Clone,
+ P: Clone,
+{
+ fn clone(&self) -> Self {
+ match self {
+ Pair::Punctuated(t, p) => Pair::Punctuated(t.clone(), p.clone()),
+ Pair::End(t) => Pair::End(t.clone()),
+ }
+ }
+}
+
+impl<T, P> Index<usize> for Punctuated<T, P> {
+ type Output = T;
+
+ fn index(&self, index: usize) -> &Self::Output {
+ if index == self.len() - 1 {
+ match &self.last {
+ Some(t) => t,
+ None => &self.inner[index].0,
+ }
+ } else {
+ &self.inner[index].0
+ }
+ }
+}
+
+impl<T, P> IndexMut<usize> for Punctuated<T, P> {
+ fn index_mut(&mut self, index: usize) -> &mut Self::Output {
+ if index == self.len() - 1 {
+ match &mut self.last {
+ Some(t) => t,
+ None => &mut self.inner[index].0,
+ }
+ } else {
+ &mut self.inner[index].0
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use proc_macro2::TokenStream;
+ use quote::{ToTokens, TokenStreamExt};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl<T, P> ToTokens for Punctuated<T, P>
+ where
+ T: ToTokens,
+ P: ToTokens,
+ {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.pairs());
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl<T, P> ToTokens for Pair<T, P>
+ where
+ T: ToTokens,
+ P: ToTokens,
+ {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ Pair::Punctuated(a, b) => {
+ a.to_tokens(tokens);
+ b.to_tokens(tokens);
+ }
+ Pair::End(a) => a.to_tokens(tokens),
+ }
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/reserved.rs b/third_party/rust/syn/src/reserved.rs
new file mode 100644
index 0000000000..abfdf43a91
--- /dev/null
+++ b/third_party/rust/syn/src/reserved.rs
@@ -0,0 +1,44 @@
+// Type for a syntax tree node that is reserved for future use.
+//
+// For example ExprReference contains a field `raw` of type Reserved. If `&raw
+// place` syntax becomes a thing as per https://github.com/rust-lang/rfcs/pull/2582,
+// we can backward compatibly change `raw`'s type to Option<Token![raw]> without
+// the possibility of breaking any code.
+
+use proc_macro2::Span;
+use std::marker::PhantomData;
+
+#[cfg(feature = "extra-traits")]
+use std::fmt::{self, Debug};
+
+ast_struct! {
+ pub struct Reserved {
+ _private: PhantomData<Span>,
+ }
+}
+
+impl Default for Reserved {
+ fn default() -> Self {
+ Reserved {
+ _private: PhantomData,
+ }
+ }
+}
+
+#[cfg(feature = "clone-impls")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+impl Clone for Reserved {
+ fn clone(&self) -> Self {
+ Reserved {
+ _private: self._private,
+ }
+ }
+}
+
+#[cfg(feature = "extra-traits")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+impl Debug for Reserved {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.debug_struct("Reserved").finish()
+ }
+}
diff --git a/third_party/rust/syn/src/sealed.rs b/third_party/rust/syn/src/sealed.rs
new file mode 100644
index 0000000000..0b11bc99a1
--- /dev/null
+++ b/third_party/rust/syn/src/sealed.rs
@@ -0,0 +1,4 @@
+#[cfg(feature = "parsing")]
+pub mod lookahead {
+ pub trait Sealed: Copy {}
+}
diff --git a/third_party/rust/syn/src/span.rs b/third_party/rust/syn/src/span.rs
new file mode 100644
index 0000000000..27a7fe846d
--- /dev/null
+++ b/third_party/rust/syn/src/span.rs
@@ -0,0 +1,67 @@
+use proc_macro2::Span;
+
+pub trait IntoSpans<S> {
+ fn into_spans(self) -> S;
+}
+
+impl IntoSpans<[Span; 1]> for Span {
+ fn into_spans(self) -> [Span; 1] {
+ [self]
+ }
+}
+
+impl IntoSpans<[Span; 2]> for Span {
+ fn into_spans(self) -> [Span; 2] {
+ [self, self]
+ }
+}
+
+impl IntoSpans<[Span; 3]> for Span {
+ fn into_spans(self) -> [Span; 3] {
+ [self, self, self]
+ }
+}
+
+impl IntoSpans<[Span; 1]> for [Span; 1] {
+ fn into_spans(self) -> [Span; 1] {
+ self
+ }
+}
+
+impl IntoSpans<[Span; 2]> for [Span; 2] {
+ fn into_spans(self) -> [Span; 2] {
+ self
+ }
+}
+
+impl IntoSpans<[Span; 3]> for [Span; 3] {
+ fn into_spans(self) -> [Span; 3] {
+ self
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub trait FromSpans: Sized {
+ fn from_spans(spans: &[Span]) -> Self;
+}
+
+#[cfg(feature = "parsing")]
+impl FromSpans for [Span; 1] {
+ fn from_spans(spans: &[Span]) -> Self {
+ [spans[0]]
+ }
+}
+
+#[cfg(feature = "parsing")]
+impl FromSpans for [Span; 2] {
+ fn from_spans(spans: &[Span]) -> Self {
+ [spans[0], spans[1]]
+ }
+}
+
+#[cfg(feature = "parsing")]
+impl FromSpans for [Span; 3] {
+ fn from_spans(spans: &[Span]) -> Self {
+ [spans[0], spans[1], spans[2]]
+ }
+}
diff --git a/third_party/rust/syn/src/spanned.rs b/third_party/rust/syn/src/spanned.rs
new file mode 100644
index 0000000000..d51ffb3fa5
--- /dev/null
+++ b/third_party/rust/syn/src/spanned.rs
@@ -0,0 +1,114 @@
+//! A trait that can provide the `Span` of the complete contents of a syntax
+//! tree node.
+//!
+//! *This module is available only if Syn is built with both the `"parsing"` and
+//! `"printing"` features.*
+//!
+//! <br>
+//!
+//! # Example
+//!
+//! Suppose in a procedural macro we have a [`Type`] that we want to assert
+//! implements the [`Sync`] trait. Maybe this is the type of one of the fields
+//! of a struct for which we are deriving a trait implementation, and we need to
+//! be able to pass a reference to one of those fields across threads.
+//!
+//! [`Type`]: crate::Type
+//! [`Sync`]: std::marker::Sync
+//!
+//! If the field type does *not* implement `Sync` as required, we want the
+//! compiler to report an error pointing out exactly which type it was.
+//!
+//! The following macro code takes a variable `ty` of type `Type` and produces a
+//! static assertion that `Sync` is implemented for that type.
+//!
+//! ```
+//! # extern crate proc_macro;
+//! #
+//! use proc_macro::TokenStream;
+//! use proc_macro2::Span;
+//! use quote::quote_spanned;
+//! use syn::Type;
+//! use syn::spanned::Spanned;
+//!
+//! # const IGNORE_TOKENS: &str = stringify! {
+//! #[proc_macro_derive(MyMacro)]
+//! # };
+//! pub fn my_macro(input: TokenStream) -> TokenStream {
+//! # let ty = get_a_type();
+//! /* ... */
+//!
+//! let assert_sync = quote_spanned! {ty.span()=>
+//! struct _AssertSync where #ty: Sync;
+//! };
+//!
+//! /* ... */
+//! # input
+//! }
+//! #
+//! # fn get_a_type() -> Type {
+//! # unimplemented!()
+//! # }
+//! ```
+//!
+//! By inserting this `assert_sync` fragment into the output code generated by
+//! our macro, the user's code will fail to compile if `ty` does not implement
+//! `Sync`. The errors they would see look like the following.
+//!
+//! ```text
+//! error[E0277]: the trait bound `*const i32: std::marker::Sync` is not satisfied
+//! --> src/main.rs:10:21
+//! |
+//! 10 | bad_field: *const i32,
+//! | ^^^^^^^^^^ `*const i32` cannot be shared between threads safely
+//! ```
+//!
+//! In this technique, using the `Type`'s span for the error message makes the
+//! error appear in the correct place underlining the right type.
+//!
+//! <br>
+//!
+//! # Limitations
+//!
+//! The underlying [`proc_macro::Span::join`] method is nightly-only. When
+//! called from within a procedural macro in a nightly compiler, `Spanned` will
+//! use `join` to produce the intended span. When not using a nightly compiler,
+//! only the span of the *first token* of the syntax tree node is returned.
+//!
+//! In the common case of wanting to use the joined span as the span of a
+//! `syn::Error`, consider instead using [`syn::Error::new_spanned`] which is
+//! able to span the error correctly under the complete syntax tree node without
+//! needing the unstable `join`.
+//!
+//! [`syn::Error::new_spanned`]: crate::Error::new_spanned
+
+use proc_macro2::Span;
+use quote::spanned::Spanned as ToTokens;
+
+/// A trait that can provide the `Span` of the complete contents of a syntax
+/// tree node.
+///
+/// This trait is automatically implemented for all types that implement
+/// [`ToTokens`] from the `quote` crate, as well as for `Span` itself.
+///
+/// [`ToTokens`]: quote::ToTokens
+///
+/// See the [module documentation] for an example.
+///
+/// [module documentation]: self
+///
+/// *This trait is available only if Syn is built with both the `"parsing"` and
+/// `"printing"` features.*
+pub trait Spanned {
+ /// Returns a `Span` covering the complete contents of this syntax tree
+ /// node, or [`Span::call_site()`] if this node is empty.
+ ///
+ /// [`Span::call_site()`]: proc_macro2::Span::call_site
+ fn span(&self) -> Span;
+}
+
+impl<T: ?Sized + ToTokens> Spanned for T {
+ fn span(&self) -> Span {
+ self.__span()
+ }
+}
diff --git a/third_party/rust/syn/src/stmt.rs b/third_party/rust/syn/src/stmt.rs
new file mode 100644
index 0000000000..58bd013ecf
--- /dev/null
+++ b/third_party/rust/syn/src/stmt.rs
@@ -0,0 +1,349 @@
+use super::*;
+
+ast_struct! {
+ /// A braced block containing Rust statements.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct Block {
+ pub brace_token: token::Brace,
+ /// Statements in a block
+ pub stmts: Vec<Stmt>,
+ }
+}
+
+ast_enum! {
+ /// A statement, usually ending in a semicolon.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub enum Stmt {
+ /// A local (let) binding.
+ Local(Local),
+
+ /// An item definition.
+ Item(Item),
+
+ /// Expr without trailing semicolon.
+ Expr(Expr),
+
+ /// Expression with trailing semicolon.
+ Semi(Expr, Token![;]),
+ }
+}
+
+ast_struct! {
+ /// A local `let` binding: `let x: u64 = s.parse()?`.
+ ///
+ /// *This type is available only if Syn is built with the `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "full")))]
+ pub struct Local {
+ pub attrs: Vec<Attribute>,
+ pub let_token: Token![let],
+ pub pat: Pat,
+ pub init: Option<(Token![=], Box<Expr>)>,
+ pub semi_token: Token![;],
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::parse::discouraged::Speculative;
+ use crate::parse::{Parse, ParseBuffer, ParseStream, Result};
+ use proc_macro2::TokenStream;
+
+ impl Block {
+ /// Parse the body of a block as zero or more statements, possibly
+ /// including one trailing expression.
+ ///
+ /// *This function is available only if Syn is built with the `"parsing"`
+ /// feature.*
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// use syn::{braced, token, Attribute, Block, Ident, Result, Stmt, Token};
+ /// use syn::parse::{Parse, ParseStream};
+ ///
+ /// // Parse a function with no generics or parameter list.
+ /// //
+ /// // fn playground {
+ /// // let mut x = 1;
+ /// // x += 1;
+ /// // println!("{}", x);
+ /// // }
+ /// struct MiniFunction {
+ /// attrs: Vec<Attribute>,
+ /// fn_token: Token![fn],
+ /// name: Ident,
+ /// brace_token: token::Brace,
+ /// stmts: Vec<Stmt>,
+ /// }
+ ///
+ /// impl Parse for MiniFunction {
+ /// fn parse(input: ParseStream) -> Result<Self> {
+ /// let outer_attrs = input.call(Attribute::parse_outer)?;
+ /// let fn_token: Token![fn] = input.parse()?;
+ /// let name: Ident = input.parse()?;
+ ///
+ /// let content;
+ /// let brace_token = braced!(content in input);
+ /// let inner_attrs = content.call(Attribute::parse_inner)?;
+ /// let stmts = content.call(Block::parse_within)?;
+ ///
+ /// Ok(MiniFunction {
+ /// attrs: {
+ /// let mut attrs = outer_attrs;
+ /// attrs.extend(inner_attrs);
+ /// attrs
+ /// },
+ /// fn_token,
+ /// name,
+ /// brace_token,
+ /// stmts,
+ /// })
+ /// }
+ /// }
+ /// ```
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn parse_within(input: ParseStream) -> Result<Vec<Stmt>> {
+ let mut stmts = Vec::new();
+ loop {
+ while let Some(semi) = input.parse::<Option<Token![;]>>()? {
+ stmts.push(Stmt::Semi(Expr::Verbatim(TokenStream::new()), semi));
+ }
+ if input.is_empty() {
+ break;
+ }
+ let s = parse_stmt(input, true)?;
+ let requires_semicolon = if let Stmt::Expr(s) = &s {
+ expr::requires_terminator(s)
+ } else {
+ false
+ };
+ stmts.push(s);
+ if input.is_empty() {
+ break;
+ } else if requires_semicolon {
+ return Err(input.error("unexpected token"));
+ }
+ }
+ Ok(stmts)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Block {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let content;
+ Ok(Block {
+ brace_token: braced!(content in input),
+ stmts: content.call(Block::parse_within)?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Stmt {
+ fn parse(input: ParseStream) -> Result<Self> {
+ parse_stmt(input, false)
+ }
+ }
+
+ fn parse_stmt(input: ParseStream, allow_nosemi: bool) -> Result<Stmt> {
+ let begin = input.fork();
+ let mut attrs = input.call(Attribute::parse_outer)?;
+
+ // brace-style macros; paren and bracket macros get parsed as
+ // expression statements.
+ let ahead = input.fork();
+ if let Ok(path) = ahead.call(Path::parse_mod_style) {
+ if ahead.peek(Token![!])
+ && (ahead.peek2(token::Brace)
+ && !(ahead.peek3(Token![.]) || ahead.peek3(Token![?]))
+ || ahead.peek2(Ident))
+ {
+ input.advance_to(&ahead);
+ return stmt_mac(input, attrs, path);
+ }
+ }
+
+ if input.peek(Token![let]) {
+ stmt_local(input, attrs, begin)
+ } else if input.peek(Token![pub])
+ || input.peek(Token![crate]) && !input.peek2(Token![::])
+ || input.peek(Token![extern])
+ || input.peek(Token![use])
+ || input.peek(Token![static])
+ && (input.peek2(Token![mut])
+ || input.peek2(Ident)
+ && !(input.peek2(Token![async])
+ && (input.peek3(Token![move]) || input.peek3(Token![|]))))
+ || input.peek(Token![const]) && !input.peek2(token::Brace)
+ || input.peek(Token![unsafe]) && !input.peek2(token::Brace)
+ || input.peek(Token![async])
+ && (input.peek2(Token![unsafe])
+ || input.peek2(Token![extern])
+ || input.peek2(Token![fn]))
+ || input.peek(Token![fn])
+ || input.peek(Token![mod])
+ || input.peek(Token![type])
+ || input.peek(Token![struct])
+ || input.peek(Token![enum])
+ || input.peek(Token![union]) && input.peek2(Ident)
+ || input.peek(Token![auto]) && input.peek2(Token![trait])
+ || input.peek(Token![trait])
+ || input.peek(Token![default])
+ && (input.peek2(Token![unsafe]) || input.peek2(Token![impl]))
+ || input.peek(Token![impl])
+ || input.peek(Token![macro])
+ {
+ let mut item: Item = input.parse()?;
+ attrs.extend(item.replace_attrs(Vec::new()));
+ item.replace_attrs(attrs);
+ Ok(Stmt::Item(item))
+ } else {
+ stmt_expr(input, allow_nosemi, attrs)
+ }
+ }
+
+ fn stmt_mac(input: ParseStream, attrs: Vec<Attribute>, path: Path) -> Result<Stmt> {
+ let bang_token: Token![!] = input.parse()?;
+ let ident: Option<Ident> = input.parse()?;
+ let (delimiter, tokens) = mac::parse_delimiter(input)?;
+ let semi_token: Option<Token![;]> = input.parse()?;
+
+ Ok(Stmt::Item(Item::Macro(ItemMacro {
+ attrs,
+ ident,
+ mac: Macro {
+ path,
+ bang_token,
+ delimiter,
+ tokens,
+ },
+ semi_token,
+ })))
+ }
+
+ fn stmt_local(input: ParseStream, attrs: Vec<Attribute>, begin: ParseBuffer) -> Result<Stmt> {
+ let let_token: Token![let] = input.parse()?;
+
+ let mut pat: Pat = pat::parsing::multi_pat_with_leading_vert(input)?;
+ if input.peek(Token![:]) {
+ let colon_token: Token![:] = input.parse()?;
+ let ty: Type = input.parse()?;
+ pat = Pat::Type(PatType {
+ attrs: Vec::new(),
+ pat: Box::new(pat),
+ colon_token,
+ ty: Box::new(ty),
+ });
+ }
+
+ let init = if input.peek(Token![=]) {
+ let eq_token: Token![=] = input.parse()?;
+ let init: Expr = input.parse()?;
+
+ if input.peek(Token![else]) {
+ input.parse::<Token![else]>()?;
+ let content;
+ braced!(content in input);
+ content.call(Block::parse_within)?;
+ let verbatim = Expr::Verbatim(verbatim::between(begin, input));
+ let semi_token: Token![;] = input.parse()?;
+ return Ok(Stmt::Semi(verbatim, semi_token));
+ }
+
+ Some((eq_token, Box::new(init)))
+ } else {
+ None
+ };
+
+ let semi_token: Token![;] = input.parse()?;
+
+ Ok(Stmt::Local(Local {
+ attrs,
+ let_token,
+ pat,
+ init,
+ semi_token,
+ }))
+ }
+
+ fn stmt_expr(
+ input: ParseStream,
+ allow_nosemi: bool,
+ mut attrs: Vec<Attribute>,
+ ) -> Result<Stmt> {
+ let mut e = expr::parsing::expr_early(input)?;
+
+ let mut attr_target = &mut e;
+ loop {
+ attr_target = match attr_target {
+ Expr::Assign(e) => &mut e.left,
+ Expr::AssignOp(e) => &mut e.left,
+ Expr::Binary(e) => &mut e.left,
+ _ => break,
+ };
+ }
+ attrs.extend(attr_target.replace_attrs(Vec::new()));
+ attr_target.replace_attrs(attrs);
+
+ if input.peek(Token![;]) {
+ return Ok(Stmt::Semi(e, input.parse()?));
+ }
+
+ if allow_nosemi || !expr::requires_terminator(&e) {
+ Ok(Stmt::Expr(e))
+ } else {
+ Err(input.error("expected semicolon"))
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use proc_macro2::TokenStream;
+ use quote::{ToTokens, TokenStreamExt};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Block {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.brace_token.surround(tokens, |tokens| {
+ tokens.append_all(&self.stmts);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Stmt {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ Stmt::Local(local) => local.to_tokens(tokens),
+ Stmt::Item(item) => item.to_tokens(tokens),
+ Stmt::Expr(expr) => expr.to_tokens(tokens),
+ Stmt::Semi(expr, semi) => {
+ expr.to_tokens(tokens);
+ semi.to_tokens(tokens);
+ }
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Local {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ expr::printing::outer_attrs_to_tokens(&self.attrs, tokens);
+ self.let_token.to_tokens(tokens);
+ self.pat.to_tokens(tokens);
+ if let Some((eq_token, init)) = &self.init {
+ eq_token.to_tokens(tokens);
+ init.to_tokens(tokens);
+ }
+ self.semi_token.to_tokens(tokens);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/thread.rs b/third_party/rust/syn/src/thread.rs
new file mode 100644
index 0000000000..9e5d8ad85e
--- /dev/null
+++ b/third_party/rust/syn/src/thread.rs
@@ -0,0 +1,41 @@
+use std::fmt::{self, Debug};
+use std::thread::{self, ThreadId};
+
+/// ThreadBound is a Sync-maker and Send-maker that allows accessing a value
+/// of type T only from the original thread on which the ThreadBound was
+/// constructed.
+pub struct ThreadBound<T> {
+ value: T,
+ thread_id: ThreadId,
+}
+
+unsafe impl<T> Sync for ThreadBound<T> {}
+
+// Send bound requires Copy, as otherwise Drop could run in the wrong place.
+unsafe impl<T: Copy> Send for ThreadBound<T> {}
+
+impl<T> ThreadBound<T> {
+ pub fn new(value: T) -> Self {
+ ThreadBound {
+ value,
+ thread_id: thread::current().id(),
+ }
+ }
+
+ pub fn get(&self) -> Option<&T> {
+ if thread::current().id() == self.thread_id {
+ Some(&self.value)
+ } else {
+ None
+ }
+ }
+}
+
+impl<T: Debug> Debug for ThreadBound<T> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ match self.get() {
+ Some(value) => Debug::fmt(value, formatter),
+ None => formatter.write_str("unknown"),
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/token.rs b/third_party/rust/syn/src/token.rs
new file mode 100644
index 0000000000..2208b07d04
--- /dev/null
+++ b/third_party/rust/syn/src/token.rs
@@ -0,0 +1,1013 @@
+//! Tokens representing Rust punctuation, keywords, and delimiters.
+//!
+//! The type names in this module can be difficult to keep straight, so we
+//! prefer to use the [`Token!`] macro instead. This is a type-macro that
+//! expands to the token type of the given token.
+//!
+//! [`Token!`]: crate::Token
+//!
+//! # Example
+//!
+//! The [`ItemStatic`] syntax tree node is defined like this.
+//!
+//! [`ItemStatic`]: crate::ItemStatic
+//!
+//! ```
+//! # use syn::{Attribute, Expr, Ident, Token, Type, Visibility};
+//! #
+//! pub struct ItemStatic {
+//! pub attrs: Vec<Attribute>,
+//! pub vis: Visibility,
+//! pub static_token: Token![static],
+//! pub mutability: Option<Token![mut]>,
+//! pub ident: Ident,
+//! pub colon_token: Token![:],
+//! pub ty: Box<Type>,
+//! pub eq_token: Token![=],
+//! pub expr: Box<Expr>,
+//! pub semi_token: Token![;],
+//! }
+//! ```
+//!
+//! # Parsing
+//!
+//! Keywords and punctuation can be parsed through the [`ParseStream::parse`]
+//! method. Delimiter tokens are parsed using the [`parenthesized!`],
+//! [`bracketed!`] and [`braced!`] macros.
+//!
+//! [`ParseStream::parse`]: crate::parse::ParseBuffer::parse()
+//! [`parenthesized!`]: crate::parenthesized!
+//! [`bracketed!`]: crate::bracketed!
+//! [`braced!`]: crate::braced!
+//!
+//! ```
+//! use syn::{Attribute, Result};
+//! use syn::parse::{Parse, ParseStream};
+//! #
+//! # enum ItemStatic {}
+//!
+//! // Parse the ItemStatic struct shown above.
+//! impl Parse for ItemStatic {
+//! fn parse(input: ParseStream) -> Result<Self> {
+//! # use syn::ItemStatic;
+//! # fn parse(input: ParseStream) -> Result<ItemStatic> {
+//! Ok(ItemStatic {
+//! attrs: input.call(Attribute::parse_outer)?,
+//! vis: input.parse()?,
+//! static_token: input.parse()?,
+//! mutability: input.parse()?,
+//! ident: input.parse()?,
+//! colon_token: input.parse()?,
+//! ty: input.parse()?,
+//! eq_token: input.parse()?,
+//! expr: input.parse()?,
+//! semi_token: input.parse()?,
+//! })
+//! # }
+//! # unimplemented!()
+//! }
+//! }
+//! ```
+//!
+//! # Other operations
+//!
+//! Every keyword and punctuation token supports the following operations.
+//!
+//! - [Peeking] — `input.peek(Token![...])`
+//!
+//! - [Parsing] — `input.parse::<Token![...]>()?`
+//!
+//! - [Printing] — `quote!( ... #the_token ... )`
+//!
+//! - Construction from a [`Span`] — `let the_token = Token![...](sp)`
+//!
+//! - Field access to its span — `let sp = the_token.span`
+//!
+//! [Peeking]: crate::parse::ParseBuffer::peek()
+//! [Parsing]: crate::parse::ParseBuffer::parse()
+//! [Printing]: https://docs.rs/quote/1.0/quote/trait.ToTokens.html
+//! [`Span`]: https://docs.rs/proc-macro2/1.0/proc_macro2/struct.Span.html
+
+use self::private::WithSpan;
+#[cfg(feature = "parsing")]
+use crate::buffer::Cursor;
+#[cfg(feature = "parsing")]
+use crate::error::Result;
+#[cfg(feature = "parsing")]
+use crate::lifetime::Lifetime;
+#[cfg(feature = "parsing")]
+use crate::lit::{Lit, LitBool, LitByte, LitByteStr, LitChar, LitFloat, LitInt, LitStr};
+#[cfg(feature = "parsing")]
+use crate::lookahead;
+#[cfg(feature = "parsing")]
+use crate::parse::{Parse, ParseStream};
+use crate::span::IntoSpans;
+#[cfg(any(feature = "parsing", feature = "printing"))]
+use proc_macro2::Ident;
+use proc_macro2::Span;
+#[cfg(feature = "printing")]
+use proc_macro2::TokenStream;
+#[cfg(feature = "parsing")]
+use proc_macro2::{Delimiter, Literal, Punct, TokenTree};
+#[cfg(feature = "printing")]
+use quote::{ToTokens, TokenStreamExt};
+#[cfg(feature = "extra-traits")]
+use std::cmp;
+#[cfg(feature = "extra-traits")]
+use std::fmt::{self, Debug};
+#[cfg(feature = "extra-traits")]
+use std::hash::{Hash, Hasher};
+use std::ops::{Deref, DerefMut};
+
+/// Marker trait for types that represent single tokens.
+///
+/// This trait is sealed and cannot be implemented for types outside of Syn.
+#[cfg(feature = "parsing")]
+pub trait Token: private::Sealed {
+ // Not public API.
+ #[doc(hidden)]
+ fn peek(cursor: Cursor) -> bool;
+
+ // Not public API.
+ #[doc(hidden)]
+ fn display() -> &'static str;
+}
+
+mod private {
+ use proc_macro2::Span;
+
+ #[cfg(feature = "parsing")]
+ pub trait Sealed {}
+
+ /// Support writing `token.span` rather than `token.spans[0]` on tokens that
+ /// hold a single span.
+ #[repr(C)]
+ pub struct WithSpan {
+ pub span: Span,
+ }
+}
+
+#[cfg(feature = "parsing")]
+impl private::Sealed for Ident {}
+
+#[cfg(feature = "parsing")]
+fn peek_impl(cursor: Cursor, peek: fn(ParseStream) -> bool) -> bool {
+ use crate::parse::Unexpected;
+ use std::cell::Cell;
+ use std::rc::Rc;
+
+ let scope = Span::call_site();
+ let unexpected = Rc::new(Cell::new(Unexpected::None));
+ let buffer = crate::parse::new_parse_buffer(scope, cursor, unexpected);
+ peek(&buffer)
+}
+
+macro_rules! impl_token {
+ ($display:tt $name:ty) => {
+ #[cfg(feature = "parsing")]
+ impl Token for $name {
+ fn peek(cursor: Cursor) -> bool {
+ fn peek(input: ParseStream) -> bool {
+ <$name as Parse>::parse(input).is_ok()
+ }
+ peek_impl(cursor, peek)
+ }
+
+ fn display() -> &'static str {
+ $display
+ }
+ }
+
+ #[cfg(feature = "parsing")]
+ impl private::Sealed for $name {}
+ };
+}
+
+impl_token!("lifetime" Lifetime);
+impl_token!("literal" Lit);
+impl_token!("string literal" LitStr);
+impl_token!("byte string literal" LitByteStr);
+impl_token!("byte literal" LitByte);
+impl_token!("character literal" LitChar);
+impl_token!("integer literal" LitInt);
+impl_token!("floating point literal" LitFloat);
+impl_token!("boolean literal" LitBool);
+impl_token!("group token" proc_macro2::Group);
+
+macro_rules! impl_low_level_token {
+ ($display:tt $ty:ident $get:ident) => {
+ #[cfg(feature = "parsing")]
+ impl Token for $ty {
+ fn peek(cursor: Cursor) -> bool {
+ cursor.$get().is_some()
+ }
+
+ fn display() -> &'static str {
+ $display
+ }
+ }
+
+ #[cfg(feature = "parsing")]
+ impl private::Sealed for $ty {}
+ };
+}
+
+impl_low_level_token!("punctuation token" Punct punct);
+impl_low_level_token!("literal" Literal literal);
+impl_low_level_token!("token" TokenTree token_tree);
+
+// Not public API.
+#[doc(hidden)]
+#[cfg(feature = "parsing")]
+pub trait CustomToken {
+ fn peek(cursor: Cursor) -> bool;
+ fn display() -> &'static str;
+}
+
+#[cfg(feature = "parsing")]
+impl<T: CustomToken> private::Sealed for T {}
+
+#[cfg(feature = "parsing")]
+impl<T: CustomToken> Token for T {
+ fn peek(cursor: Cursor) -> bool {
+ <Self as CustomToken>::peek(cursor)
+ }
+
+ fn display() -> &'static str {
+ <Self as CustomToken>::display()
+ }
+}
+
+macro_rules! define_keywords {
+ ($($token:tt pub struct $name:ident #[$doc:meta])*) => {
+ $(
+ #[$doc]
+ ///
+ /// Don't try to remember the name of this type &mdash; use the
+ /// [`Token!`] macro instead.
+ ///
+ /// [`Token!`]: crate::token
+ pub struct $name {
+ pub span: Span,
+ }
+
+ #[doc(hidden)]
+ #[allow(non_snake_case)]
+ pub fn $name<S: IntoSpans<[Span; 1]>>(span: S) -> $name {
+ $name {
+ span: span.into_spans()[0],
+ }
+ }
+
+ impl std::default::Default for $name {
+ fn default() -> Self {
+ $name {
+ span: Span::call_site(),
+ }
+ }
+ }
+
+ #[cfg(feature = "clone-impls")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+ impl Copy for $name {}
+
+ #[cfg(feature = "clone-impls")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+ impl Clone for $name {
+ fn clone(&self) -> Self {
+ *self
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Debug for $name {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ f.write_str(stringify!($name))
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl cmp::Eq for $name {}
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl PartialEq for $name {
+ fn eq(&self, _other: &$name) -> bool {
+ true
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Hash for $name {
+ fn hash<H: Hasher>(&self, _state: &mut H) {}
+ }
+
+ #[cfg(feature = "printing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for $name {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ printing::keyword($token, self.span, tokens);
+ }
+ }
+
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for $name {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok($name {
+ span: parsing::keyword(input, $token)?,
+ })
+ }
+ }
+
+ #[cfg(feature = "parsing")]
+ impl Token for $name {
+ fn peek(cursor: Cursor) -> bool {
+ parsing::peek_keyword(cursor, $token)
+ }
+
+ fn display() -> &'static str {
+ concat!("`", $token, "`")
+ }
+ }
+
+ #[cfg(feature = "parsing")]
+ impl private::Sealed for $name {}
+ )*
+ };
+}
+
+macro_rules! impl_deref_if_len_is_1 {
+ ($name:ident/1) => {
+ impl Deref for $name {
+ type Target = WithSpan;
+
+ fn deref(&self) -> &Self::Target {
+ unsafe { &*(self as *const Self as *const WithSpan) }
+ }
+ }
+
+ impl DerefMut for $name {
+ fn deref_mut(&mut self) -> &mut Self::Target {
+ unsafe { &mut *(self as *mut Self as *mut WithSpan) }
+ }
+ }
+ };
+
+ ($name:ident/$len:tt) => {};
+}
+
+macro_rules! define_punctuation_structs {
+ ($($token:tt pub struct $name:ident/$len:tt #[$doc:meta])*) => {
+ $(
+ #[repr(C)]
+ #[$doc]
+ ///
+ /// Don't try to remember the name of this type &mdash; use the
+ /// [`Token!`] macro instead.
+ ///
+ /// [`Token!`]: crate::token
+ pub struct $name {
+ pub spans: [Span; $len],
+ }
+
+ #[doc(hidden)]
+ #[allow(non_snake_case)]
+ pub fn $name<S: IntoSpans<[Span; $len]>>(spans: S) -> $name {
+ $name {
+ spans: spans.into_spans(),
+ }
+ }
+
+ impl std::default::Default for $name {
+ fn default() -> Self {
+ $name {
+ spans: [Span::call_site(); $len],
+ }
+ }
+ }
+
+ #[cfg(feature = "clone-impls")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+ impl Copy for $name {}
+
+ #[cfg(feature = "clone-impls")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+ impl Clone for $name {
+ fn clone(&self) -> Self {
+ *self
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Debug for $name {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ f.write_str(stringify!($name))
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl cmp::Eq for $name {}
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl PartialEq for $name {
+ fn eq(&self, _other: &$name) -> bool {
+ true
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Hash for $name {
+ fn hash<H: Hasher>(&self, _state: &mut H) {}
+ }
+
+ impl_deref_if_len_is_1!($name/$len);
+ )*
+ };
+}
+
+macro_rules! define_punctuation {
+ ($($token:tt pub struct $name:ident/$len:tt #[$doc:meta])*) => {
+ $(
+ define_punctuation_structs! {
+ $token pub struct $name/$len #[$doc]
+ }
+
+ #[cfg(feature = "printing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for $name {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ printing::punct($token, &self.spans, tokens);
+ }
+ }
+
+ #[cfg(feature = "parsing")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for $name {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok($name {
+ spans: parsing::punct(input, $token)?,
+ })
+ }
+ }
+
+ #[cfg(feature = "parsing")]
+ impl Token for $name {
+ fn peek(cursor: Cursor) -> bool {
+ parsing::peek_punct(cursor, $token)
+ }
+
+ fn display() -> &'static str {
+ concat!("`", $token, "`")
+ }
+ }
+
+ #[cfg(feature = "parsing")]
+ impl private::Sealed for $name {}
+ )*
+ };
+}
+
+macro_rules! define_delimiters {
+ ($($token:tt pub struct $name:ident #[$doc:meta])*) => {
+ $(
+ #[$doc]
+ pub struct $name {
+ pub span: Span,
+ }
+
+ #[doc(hidden)]
+ #[allow(non_snake_case)]
+ pub fn $name<S: IntoSpans<[Span; 1]>>(span: S) -> $name {
+ $name {
+ span: span.into_spans()[0],
+ }
+ }
+
+ impl std::default::Default for $name {
+ fn default() -> Self {
+ $name {
+ span: Span::call_site(),
+ }
+ }
+ }
+
+ #[cfg(feature = "clone-impls")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+ impl Copy for $name {}
+
+ #[cfg(feature = "clone-impls")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "clone-impls")))]
+ impl Clone for $name {
+ fn clone(&self) -> Self {
+ *self
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Debug for $name {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ f.write_str(stringify!($name))
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl cmp::Eq for $name {}
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl PartialEq for $name {
+ fn eq(&self, _other: &$name) -> bool {
+ true
+ }
+ }
+
+ #[cfg(feature = "extra-traits")]
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "extra-traits")))]
+ impl Hash for $name {
+ fn hash<H: Hasher>(&self, _state: &mut H) {}
+ }
+
+ impl $name {
+ #[cfg(feature = "printing")]
+ pub fn surround<F>(&self, tokens: &mut TokenStream, f: F)
+ where
+ F: FnOnce(&mut TokenStream),
+ {
+ printing::delim($token, self.span, tokens, f);
+ }
+ }
+
+ #[cfg(feature = "parsing")]
+ impl private::Sealed for $name {}
+ )*
+ };
+}
+
+define_punctuation_structs! {
+ "_" pub struct Underscore/1 /// `_`
+}
+
+#[cfg(feature = "printing")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+impl ToTokens for Underscore {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append(Ident::new("_", self.span));
+ }
+}
+
+#[cfg(feature = "parsing")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+impl Parse for Underscore {
+ fn parse(input: ParseStream) -> Result<Self> {
+ input.step(|cursor| {
+ if let Some((ident, rest)) = cursor.ident() {
+ if ident == "_" {
+ return Ok((Underscore(ident.span()), rest));
+ }
+ }
+ if let Some((punct, rest)) = cursor.punct() {
+ if punct.as_char() == '_' {
+ return Ok((Underscore(punct.span()), rest));
+ }
+ }
+ Err(cursor.error("expected `_`"))
+ })
+ }
+}
+
+#[cfg(feature = "parsing")]
+impl Token for Underscore {
+ fn peek(cursor: Cursor) -> bool {
+ if let Some((ident, _rest)) = cursor.ident() {
+ return ident == "_";
+ }
+ if let Some((punct, _rest)) = cursor.punct() {
+ return punct.as_char() == '_';
+ }
+ false
+ }
+
+ fn display() -> &'static str {
+ "`_`"
+ }
+}
+
+#[cfg(feature = "parsing")]
+impl private::Sealed for Underscore {}
+
+#[cfg(feature = "parsing")]
+impl Token for Paren {
+ fn peek(cursor: Cursor) -> bool {
+ lookahead::is_delimiter(cursor, Delimiter::Parenthesis)
+ }
+
+ fn display() -> &'static str {
+ "parentheses"
+ }
+}
+
+#[cfg(feature = "parsing")]
+impl Token for Brace {
+ fn peek(cursor: Cursor) -> bool {
+ lookahead::is_delimiter(cursor, Delimiter::Brace)
+ }
+
+ fn display() -> &'static str {
+ "curly braces"
+ }
+}
+
+#[cfg(feature = "parsing")]
+impl Token for Bracket {
+ fn peek(cursor: Cursor) -> bool {
+ lookahead::is_delimiter(cursor, Delimiter::Bracket)
+ }
+
+ fn display() -> &'static str {
+ "square brackets"
+ }
+}
+
+#[cfg(feature = "parsing")]
+impl Token for Group {
+ fn peek(cursor: Cursor) -> bool {
+ lookahead::is_delimiter(cursor, Delimiter::None)
+ }
+
+ fn display() -> &'static str {
+ "invisible group"
+ }
+}
+
+define_keywords! {
+ "abstract" pub struct Abstract /// `abstract`
+ "as" pub struct As /// `as`
+ "async" pub struct Async /// `async`
+ "auto" pub struct Auto /// `auto`
+ "await" pub struct Await /// `await`
+ "become" pub struct Become /// `become`
+ "box" pub struct Box /// `box`
+ "break" pub struct Break /// `break`
+ "const" pub struct Const /// `const`
+ "continue" pub struct Continue /// `continue`
+ "crate" pub struct Crate /// `crate`
+ "default" pub struct Default /// `default`
+ "do" pub struct Do /// `do`
+ "dyn" pub struct Dyn /// `dyn`
+ "else" pub struct Else /// `else`
+ "enum" pub struct Enum /// `enum`
+ "extern" pub struct Extern /// `extern`
+ "final" pub struct Final /// `final`
+ "fn" pub struct Fn /// `fn`
+ "for" pub struct For /// `for`
+ "if" pub struct If /// `if`
+ "impl" pub struct Impl /// `impl`
+ "in" pub struct In /// `in`
+ "let" pub struct Let /// `let`
+ "loop" pub struct Loop /// `loop`
+ "macro" pub struct Macro /// `macro`
+ "match" pub struct Match /// `match`
+ "mod" pub struct Mod /// `mod`
+ "move" pub struct Move /// `move`
+ "mut" pub struct Mut /// `mut`
+ "override" pub struct Override /// `override`
+ "priv" pub struct Priv /// `priv`
+ "pub" pub struct Pub /// `pub`
+ "ref" pub struct Ref /// `ref`
+ "return" pub struct Return /// `return`
+ "Self" pub struct SelfType /// `Self`
+ "self" pub struct SelfValue /// `self`
+ "static" pub struct Static /// `static`
+ "struct" pub struct Struct /// `struct`
+ "super" pub struct Super /// `super`
+ "trait" pub struct Trait /// `trait`
+ "try" pub struct Try /// `try`
+ "type" pub struct Type /// `type`
+ "typeof" pub struct Typeof /// `typeof`
+ "union" pub struct Union /// `union`
+ "unsafe" pub struct Unsafe /// `unsafe`
+ "unsized" pub struct Unsized /// `unsized`
+ "use" pub struct Use /// `use`
+ "virtual" pub struct Virtual /// `virtual`
+ "where" pub struct Where /// `where`
+ "while" pub struct While /// `while`
+ "yield" pub struct Yield /// `yield`
+}
+
+define_punctuation! {
+ "+" pub struct Add/1 /// `+`
+ "+=" pub struct AddEq/2 /// `+=`
+ "&" pub struct And/1 /// `&`
+ "&&" pub struct AndAnd/2 /// `&&`
+ "&=" pub struct AndEq/2 /// `&=`
+ "@" pub struct At/1 /// `@`
+ "!" pub struct Bang/1 /// `!`
+ "^" pub struct Caret/1 /// `^`
+ "^=" pub struct CaretEq/2 /// `^=`
+ ":" pub struct Colon/1 /// `:`
+ "::" pub struct Colon2/2 /// `::`
+ "," pub struct Comma/1 /// `,`
+ "/" pub struct Div/1 /// `/`
+ "/=" pub struct DivEq/2 /// `/=`
+ "$" pub struct Dollar/1 /// `$`
+ "." pub struct Dot/1 /// `.`
+ ".." pub struct Dot2/2 /// `..`
+ "..." pub struct Dot3/3 /// `...`
+ "..=" pub struct DotDotEq/3 /// `..=`
+ "=" pub struct Eq/1 /// `=`
+ "==" pub struct EqEq/2 /// `==`
+ ">=" pub struct Ge/2 /// `>=`
+ ">" pub struct Gt/1 /// `>`
+ "<=" pub struct Le/2 /// `<=`
+ "<" pub struct Lt/1 /// `<`
+ "*=" pub struct MulEq/2 /// `*=`
+ "!=" pub struct Ne/2 /// `!=`
+ "|" pub struct Or/1 /// `|`
+ "|=" pub struct OrEq/2 /// `|=`
+ "||" pub struct OrOr/2 /// `||`
+ "#" pub struct Pound/1 /// `#`
+ "?" pub struct Question/1 /// `?`
+ "->" pub struct RArrow/2 /// `->`
+ "<-" pub struct LArrow/2 /// `<-`
+ "%" pub struct Rem/1 /// `%`
+ "%=" pub struct RemEq/2 /// `%=`
+ "=>" pub struct FatArrow/2 /// `=>`
+ ";" pub struct Semi/1 /// `;`
+ "<<" pub struct Shl/2 /// `<<`
+ "<<=" pub struct ShlEq/3 /// `<<=`
+ ">>" pub struct Shr/2 /// `>>`
+ ">>=" pub struct ShrEq/3 /// `>>=`
+ "*" pub struct Star/1 /// `*`
+ "-" pub struct Sub/1 /// `-`
+ "-=" pub struct SubEq/2 /// `-=`
+ "~" pub struct Tilde/1 /// `~`
+}
+
+define_delimiters! {
+ "{" pub struct Brace /// `{...}`
+ "[" pub struct Bracket /// `[...]`
+ "(" pub struct Paren /// `(...)`
+ " " pub struct Group /// None-delimited group
+}
+
+macro_rules! export_token_macro {
+ ($($await_rule:tt)*) => {
+ /// A type-macro that expands to the name of the Rust type representation of a
+ /// given token.
+ ///
+ /// See the [token module] documentation for details and examples.
+ ///
+ /// [token module]: crate::token
+ // Unfortunate duplication due to a rustdoc bug.
+ // https://github.com/rust-lang/rust/issues/45939
+ #[macro_export]
+ macro_rules! Token {
+ [abstract] => { $crate::token::Abstract };
+ [as] => { $crate::token::As };
+ [async] => { $crate::token::Async };
+ [auto] => { $crate::token::Auto };
+ $($await_rule => { $crate::token::Await };)*
+ [become] => { $crate::token::Become };
+ [box] => { $crate::token::Box };
+ [break] => { $crate::token::Break };
+ [const] => { $crate::token::Const };
+ [continue] => { $crate::token::Continue };
+ [crate] => { $crate::token::Crate };
+ [default] => { $crate::token::Default };
+ [do] => { $crate::token::Do };
+ [dyn] => { $crate::token::Dyn };
+ [else] => { $crate::token::Else };
+ [enum] => { $crate::token::Enum };
+ [extern] => { $crate::token::Extern };
+ [final] => { $crate::token::Final };
+ [fn] => { $crate::token::Fn };
+ [for] => { $crate::token::For };
+ [if] => { $crate::token::If };
+ [impl] => { $crate::token::Impl };
+ [in] => { $crate::token::In };
+ [let] => { $crate::token::Let };
+ [loop] => { $crate::token::Loop };
+ [macro] => { $crate::token::Macro };
+ [match] => { $crate::token::Match };
+ [mod] => { $crate::token::Mod };
+ [move] => { $crate::token::Move };
+ [mut] => { $crate::token::Mut };
+ [override] => { $crate::token::Override };
+ [priv] => { $crate::token::Priv };
+ [pub] => { $crate::token::Pub };
+ [ref] => { $crate::token::Ref };
+ [return] => { $crate::token::Return };
+ [Self] => { $crate::token::SelfType };
+ [self] => { $crate::token::SelfValue };
+ [static] => { $crate::token::Static };
+ [struct] => { $crate::token::Struct };
+ [super] => { $crate::token::Super };
+ [trait] => { $crate::token::Trait };
+ [try] => { $crate::token::Try };
+ [type] => { $crate::token::Type };
+ [typeof] => { $crate::token::Typeof };
+ [union] => { $crate::token::Union };
+ [unsafe] => { $crate::token::Unsafe };
+ [unsized] => { $crate::token::Unsized };
+ [use] => { $crate::token::Use };
+ [virtual] => { $crate::token::Virtual };
+ [where] => { $crate::token::Where };
+ [while] => { $crate::token::While };
+ [yield] => { $crate::token::Yield };
+ [+] => { $crate::token::Add };
+ [+=] => { $crate::token::AddEq };
+ [&] => { $crate::token::And };
+ [&&] => { $crate::token::AndAnd };
+ [&=] => { $crate::token::AndEq };
+ [@] => { $crate::token::At };
+ [!] => { $crate::token::Bang };
+ [^] => { $crate::token::Caret };
+ [^=] => { $crate::token::CaretEq };
+ [:] => { $crate::token::Colon };
+ [::] => { $crate::token::Colon2 };
+ [,] => { $crate::token::Comma };
+ [/] => { $crate::token::Div };
+ [/=] => { $crate::token::DivEq };
+ [$] => { $crate::token::Dollar };
+ [.] => { $crate::token::Dot };
+ [..] => { $crate::token::Dot2 };
+ [...] => { $crate::token::Dot3 };
+ [..=] => { $crate::token::DotDotEq };
+ [=] => { $crate::token::Eq };
+ [==] => { $crate::token::EqEq };
+ [>=] => { $crate::token::Ge };
+ [>] => { $crate::token::Gt };
+ [<=] => { $crate::token::Le };
+ [<] => { $crate::token::Lt };
+ [*=] => { $crate::token::MulEq };
+ [!=] => { $crate::token::Ne };
+ [|] => { $crate::token::Or };
+ [|=] => { $crate::token::OrEq };
+ [||] => { $crate::token::OrOr };
+ [#] => { $crate::token::Pound };
+ [?] => { $crate::token::Question };
+ [->] => { $crate::token::RArrow };
+ [<-] => { $crate::token::LArrow };
+ [%] => { $crate::token::Rem };
+ [%=] => { $crate::token::RemEq };
+ [=>] => { $crate::token::FatArrow };
+ [;] => { $crate::token::Semi };
+ [<<] => { $crate::token::Shl };
+ [<<=] => { $crate::token::ShlEq };
+ [>>] => { $crate::token::Shr };
+ [>>=] => { $crate::token::ShrEq };
+ [*] => { $crate::token::Star };
+ [-] => { $crate::token::Sub };
+ [-=] => { $crate::token::SubEq };
+ [~] => { $crate::token::Tilde };
+ [_] => { $crate::token::Underscore };
+ }
+ };
+}
+
+// Old rustc does not permit `await` appearing anywhere in the source file.
+// https://github.com/rust-lang/rust/issues/57919
+// We put the Token![await] rule in a place that is not lexed by old rustc.
+#[cfg(not(syn_omit_await_from_token_macro))]
+include!("await.rs"); // export_token_macro! {[await]}
+#[cfg(syn_omit_await_from_token_macro)]
+export_token_macro! {}
+
+// Not public API.
+#[doc(hidden)]
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use crate::buffer::Cursor;
+ use crate::error::{Error, Result};
+ use crate::parse::ParseStream;
+ use crate::span::FromSpans;
+ use proc_macro2::{Spacing, Span};
+
+ pub fn keyword(input: ParseStream, token: &str) -> Result<Span> {
+ input.step(|cursor| {
+ if let Some((ident, rest)) = cursor.ident() {
+ if ident == token {
+ return Ok((ident.span(), rest));
+ }
+ }
+ Err(cursor.error(format!("expected `{}`", token)))
+ })
+ }
+
+ pub fn peek_keyword(cursor: Cursor, token: &str) -> bool {
+ if let Some((ident, _rest)) = cursor.ident() {
+ ident == token
+ } else {
+ false
+ }
+ }
+
+ pub fn punct<S: FromSpans>(input: ParseStream, token: &str) -> Result<S> {
+ let mut spans = [input.span(); 3];
+ punct_helper(input, token, &mut spans)?;
+ Ok(S::from_spans(&spans))
+ }
+
+ fn punct_helper(input: ParseStream, token: &str, spans: &mut [Span; 3]) -> Result<()> {
+ input.step(|cursor| {
+ let mut cursor = *cursor;
+ assert!(token.len() <= spans.len());
+
+ for (i, ch) in token.chars().enumerate() {
+ match cursor.punct() {
+ Some((punct, rest)) => {
+ spans[i] = punct.span();
+ if punct.as_char() != ch {
+ break;
+ } else if i == token.len() - 1 {
+ return Ok(((), rest));
+ } else if punct.spacing() != Spacing::Joint {
+ break;
+ }
+ cursor = rest;
+ }
+ None => break,
+ }
+ }
+
+ Err(Error::new(spans[0], format!("expected `{}`", token)))
+ })
+ }
+
+ pub fn peek_punct(mut cursor: Cursor, token: &str) -> bool {
+ for (i, ch) in token.chars().enumerate() {
+ match cursor.punct() {
+ Some((punct, rest)) => {
+ if punct.as_char() != ch {
+ break;
+ } else if i == token.len() - 1 {
+ return true;
+ } else if punct.spacing() != Spacing::Joint {
+ break;
+ }
+ cursor = rest;
+ }
+ None => break,
+ }
+ }
+ false
+ }
+}
+
+// Not public API.
+#[doc(hidden)]
+#[cfg(feature = "printing")]
+pub mod printing {
+ use proc_macro2::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream};
+ use quote::TokenStreamExt;
+
+ pub fn punct(s: &str, spans: &[Span], tokens: &mut TokenStream) {
+ assert_eq!(s.len(), spans.len());
+
+ let mut chars = s.chars();
+ let mut spans = spans.iter();
+ let ch = chars.next_back().unwrap();
+ let span = spans.next_back().unwrap();
+ for (ch, span) in chars.zip(spans) {
+ let mut op = Punct::new(ch, Spacing::Joint);
+ op.set_span(*span);
+ tokens.append(op);
+ }
+
+ let mut op = Punct::new(ch, Spacing::Alone);
+ op.set_span(*span);
+ tokens.append(op);
+ }
+
+ pub fn keyword(s: &str, span: Span, tokens: &mut TokenStream) {
+ tokens.append(Ident::new(s, span));
+ }
+
+ pub fn delim<F>(s: &str, span: Span, tokens: &mut TokenStream, f: F)
+ where
+ F: FnOnce(&mut TokenStream),
+ {
+ let delim = match s {
+ "(" => Delimiter::Parenthesis,
+ "[" => Delimiter::Bracket,
+ "{" => Delimiter::Brace,
+ " " => Delimiter::None,
+ _ => panic!("unknown delimiter: {}", s),
+ };
+ let mut inner = TokenStream::new();
+ f(&mut inner);
+ let mut g = Group::new(delim, inner);
+ g.set_span(span);
+ tokens.append(g);
+ }
+}
diff --git a/third_party/rust/syn/src/tt.rs b/third_party/rust/syn/src/tt.rs
new file mode 100644
index 0000000000..d87c0ed4dc
--- /dev/null
+++ b/third_party/rust/syn/src/tt.rs
@@ -0,0 +1,107 @@
+use proc_macro2::{Delimiter, TokenStream, TokenTree};
+use std::hash::{Hash, Hasher};
+
+pub struct TokenTreeHelper<'a>(pub &'a TokenTree);
+
+impl<'a> PartialEq for TokenTreeHelper<'a> {
+ fn eq(&self, other: &Self) -> bool {
+ use proc_macro2::Spacing;
+
+ match (self.0, other.0) {
+ (TokenTree::Group(g1), TokenTree::Group(g2)) => {
+ match (g1.delimiter(), g2.delimiter()) {
+ (Delimiter::Parenthesis, Delimiter::Parenthesis)
+ | (Delimiter::Brace, Delimiter::Brace)
+ | (Delimiter::Bracket, Delimiter::Bracket)
+ | (Delimiter::None, Delimiter::None) => {}
+ _ => return false,
+ }
+
+ let s1 = g1.stream().into_iter();
+ let mut s2 = g2.stream().into_iter();
+
+ for item1 in s1 {
+ let item2 = match s2.next() {
+ Some(item) => item,
+ None => return false,
+ };
+ if TokenTreeHelper(&item1) != TokenTreeHelper(&item2) {
+ return false;
+ }
+ }
+ s2.next().is_none()
+ }
+ (TokenTree::Punct(o1), TokenTree::Punct(o2)) => {
+ o1.as_char() == o2.as_char()
+ && match (o1.spacing(), o2.spacing()) {
+ (Spacing::Alone, Spacing::Alone) | (Spacing::Joint, Spacing::Joint) => true,
+ _ => false,
+ }
+ }
+ (TokenTree::Literal(l1), TokenTree::Literal(l2)) => l1.to_string() == l2.to_string(),
+ (TokenTree::Ident(s1), TokenTree::Ident(s2)) => s1 == s2,
+ _ => false,
+ }
+ }
+}
+
+impl<'a> Hash for TokenTreeHelper<'a> {
+ fn hash<H: Hasher>(&self, h: &mut H) {
+ use proc_macro2::Spacing;
+
+ match self.0 {
+ TokenTree::Group(g) => {
+ 0u8.hash(h);
+ match g.delimiter() {
+ Delimiter::Parenthesis => 0u8.hash(h),
+ Delimiter::Brace => 1u8.hash(h),
+ Delimiter::Bracket => 2u8.hash(h),
+ Delimiter::None => 3u8.hash(h),
+ }
+
+ for item in g.stream() {
+ TokenTreeHelper(&item).hash(h);
+ }
+ 0xffu8.hash(h); // terminator w/ a variant we don't normally hash
+ }
+ TokenTree::Punct(op) => {
+ 1u8.hash(h);
+ op.as_char().hash(h);
+ match op.spacing() {
+ Spacing::Alone => 0u8.hash(h),
+ Spacing::Joint => 1u8.hash(h),
+ }
+ }
+ TokenTree::Literal(lit) => (2u8, lit.to_string()).hash(h),
+ TokenTree::Ident(word) => (3u8, word).hash(h),
+ }
+ }
+}
+
+pub struct TokenStreamHelper<'a>(pub &'a TokenStream);
+
+impl<'a> PartialEq for TokenStreamHelper<'a> {
+ fn eq(&self, other: &Self) -> bool {
+ let left = self.0.clone().into_iter().collect::<Vec<_>>();
+ let right = other.0.clone().into_iter().collect::<Vec<_>>();
+ if left.len() != right.len() {
+ return false;
+ }
+ for (a, b) in left.into_iter().zip(right) {
+ if TokenTreeHelper(&a) != TokenTreeHelper(&b) {
+ return false;
+ }
+ }
+ true
+ }
+}
+
+impl<'a> Hash for TokenStreamHelper<'a> {
+ fn hash<H: Hasher>(&self, state: &mut H) {
+ let tts = self.0.clone().into_iter().collect::<Vec<_>>();
+ tts.len().hash(state);
+ for tt in tts {
+ TokenTreeHelper(&tt).hash(state);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/ty.rs b/third_party/rust/syn/src/ty.rs
new file mode 100644
index 0000000000..8c841e2f79
--- /dev/null
+++ b/third_party/rust/syn/src/ty.rs
@@ -0,0 +1,1304 @@
+use super::*;
+use crate::punctuated::Punctuated;
+use proc_macro2::TokenStream;
+
+ast_enum_of_structs! {
+ /// The possible types that a Rust value could have.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ ///
+ /// # Syntax tree enum
+ ///
+ /// This type is a [syntax tree enum].
+ ///
+ /// [syntax tree enum]: Expr#syntax-tree-enums
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ #[cfg_attr(not(syn_no_non_exhaustive), non_exhaustive)]
+ pub enum Type {
+ /// A fixed size array type: `[T; n]`.
+ Array(TypeArray),
+
+ /// A bare function type: `fn(usize) -> bool`.
+ BareFn(TypeBareFn),
+
+ /// A type contained within invisible delimiters.
+ Group(TypeGroup),
+
+ /// An `impl Bound1 + Bound2 + Bound3` type where `Bound` is a trait or
+ /// a lifetime.
+ ImplTrait(TypeImplTrait),
+
+ /// Indication that a type should be inferred by the compiler: `_`.
+ Infer(TypeInfer),
+
+ /// A macro in the type position.
+ Macro(TypeMacro),
+
+ /// The never type: `!`.
+ Never(TypeNever),
+
+ /// A parenthesized type equivalent to the inner type.
+ Paren(TypeParen),
+
+ /// A path like `std::slice::Iter`, optionally qualified with a
+ /// self-type as in `<Vec<T> as SomeTrait>::Associated`.
+ Path(TypePath),
+
+ /// A raw pointer type: `*const T` or `*mut T`.
+ Ptr(TypePtr),
+
+ /// A reference type: `&'a T` or `&'a mut T`.
+ Reference(TypeReference),
+
+ /// A dynamically sized slice type: `[T]`.
+ Slice(TypeSlice),
+
+ /// A trait object type `dyn Bound1 + Bound2 + Bound3` where `Bound` is a
+ /// trait or a lifetime.
+ TraitObject(TypeTraitObject),
+
+ /// A tuple type: `(A, B, C, String)`.
+ Tuple(TypeTuple),
+
+ /// Tokens in type position not interpreted by Syn.
+ Verbatim(TokenStream),
+
+ // Not public API.
+ //
+ // For testing exhaustiveness in downstream code, use the following idiom:
+ //
+ // match ty {
+ // Type::Array(ty) => {...}
+ // Type::BareFn(ty) => {...}
+ // ...
+ // Type::Verbatim(ty) => {...}
+ //
+ // #[cfg_attr(test, deny(non_exhaustive_omitted_patterns))]
+ // _ => { /* some sane fallback */ }
+ // }
+ //
+ // This way we fail your tests but don't break your library when adding
+ // a variant. You will be notified by a test failure when a variant is
+ // added, so that you can add code to handle it, but your library will
+ // continue to compile and work for downstream users in the interim.
+ #[cfg(syn_no_non_exhaustive)]
+ #[doc(hidden)]
+ __NonExhaustive,
+ }
+}
+
+ast_struct! {
+ /// A fixed size array type: `[T; n]`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeArray {
+ pub bracket_token: token::Bracket,
+ pub elem: Box<Type>,
+ pub semi_token: Token![;],
+ pub len: Expr,
+ }
+}
+
+ast_struct! {
+ /// A bare function type: `fn(usize) -> bool`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeBareFn {
+ pub lifetimes: Option<BoundLifetimes>,
+ pub unsafety: Option<Token![unsafe]>,
+ pub abi: Option<Abi>,
+ pub fn_token: Token![fn],
+ pub paren_token: token::Paren,
+ pub inputs: Punctuated<BareFnArg, Token![,]>,
+ pub variadic: Option<Variadic>,
+ pub output: ReturnType,
+ }
+}
+
+ast_struct! {
+ /// A type contained within invisible delimiters.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeGroup {
+ pub group_token: token::Group,
+ pub elem: Box<Type>,
+ }
+}
+
+ast_struct! {
+ /// An `impl Bound1 + Bound2 + Bound3` type where `Bound` is a trait or
+ /// a lifetime.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeImplTrait {
+ pub impl_token: Token![impl],
+ pub bounds: Punctuated<TypeParamBound, Token![+]>,
+ }
+}
+
+ast_struct! {
+ /// Indication that a type should be inferred by the compiler: `_`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeInfer {
+ pub underscore_token: Token![_],
+ }
+}
+
+ast_struct! {
+ /// A macro in the type position.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeMacro {
+ pub mac: Macro,
+ }
+}
+
+ast_struct! {
+ /// The never type: `!`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeNever {
+ pub bang_token: Token![!],
+ }
+}
+
+ast_struct! {
+ /// A parenthesized type equivalent to the inner type.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeParen {
+ pub paren_token: token::Paren,
+ pub elem: Box<Type>,
+ }
+}
+
+ast_struct! {
+ /// A path like `std::slice::Iter`, optionally qualified with a
+ /// self-type as in `<Vec<T> as SomeTrait>::Associated`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypePath {
+ pub qself: Option<QSelf>,
+ pub path: Path,
+ }
+}
+
+ast_struct! {
+ /// A raw pointer type: `*const T` or `*mut T`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypePtr {
+ pub star_token: Token![*],
+ pub const_token: Option<Token![const]>,
+ pub mutability: Option<Token![mut]>,
+ pub elem: Box<Type>,
+ }
+}
+
+ast_struct! {
+ /// A reference type: `&'a T` or `&'a mut T`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeReference {
+ pub and_token: Token![&],
+ pub lifetime: Option<Lifetime>,
+ pub mutability: Option<Token![mut]>,
+ pub elem: Box<Type>,
+ }
+}
+
+ast_struct! {
+ /// A dynamically sized slice type: `[T]`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeSlice {
+ pub bracket_token: token::Bracket,
+ pub elem: Box<Type>,
+ }
+}
+
+ast_struct! {
+ /// A trait object type `dyn Bound1 + Bound2 + Bound3` where `Bound` is a
+ /// trait or a lifetime.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeTraitObject {
+ pub dyn_token: Option<Token![dyn]>,
+ pub bounds: Punctuated<TypeParamBound, Token![+]>,
+ }
+}
+
+ast_struct! {
+ /// A tuple type: `(A, B, C, String)`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or
+ /// `"full"` feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct TypeTuple {
+ pub paren_token: token::Paren,
+ pub elems: Punctuated<Type, Token![,]>,
+ }
+}
+
+ast_struct! {
+ /// The binary interface of a function: `extern "C"`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Abi {
+ pub extern_token: Token![extern],
+ pub name: Option<LitStr>,
+ }
+}
+
+ast_struct! {
+ /// An argument in a function type: the `usize` in `fn(usize) -> bool`.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct BareFnArg {
+ pub attrs: Vec<Attribute>,
+ pub name: Option<(Ident, Token![:])>,
+ pub ty: Type,
+ }
+}
+
+ast_struct! {
+ /// The variadic argument of a foreign function.
+ ///
+ /// ```rust
+ /// # struct c_char;
+ /// # struct c_int;
+ /// #
+ /// extern "C" {
+ /// fn printf(format: *const c_char, ...) -> c_int;
+ /// // ^^^
+ /// }
+ /// ```
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub struct Variadic {
+ pub attrs: Vec<Attribute>,
+ pub dots: Token![...],
+ }
+}
+
+ast_enum! {
+ /// Return type of a function signature.
+ ///
+ /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+ /// feature.*
+ #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+ pub enum ReturnType {
+ /// Return type is not specified.
+ ///
+ /// Functions default to `()` and closures default to type inference.
+ Default,
+ /// A particular type is returned.
+ Type(Token![->], Box<Type>),
+ }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+ use super::*;
+ use crate::ext::IdentExt;
+ use crate::parse::{Parse, ParseStream, Result};
+ use crate::path;
+ use proc_macro2::{Punct, Spacing, Span, TokenTree};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Type {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_plus = true;
+ let allow_group_generic = true;
+ ambig_ty(input, allow_plus, allow_group_generic)
+ }
+ }
+
+ impl Type {
+ /// In some positions, types may not contain the `+` character, to
+ /// disambiguate them. For example in the expression `1 as T`, T may not
+ /// contain a `+` character.
+ ///
+ /// This parser does not allow a `+`, while the default parser does.
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn without_plus(input: ParseStream) -> Result<Self> {
+ let allow_plus = false;
+ let allow_group_generic = true;
+ ambig_ty(input, allow_plus, allow_group_generic)
+ }
+ }
+
+ pub(crate) fn ambig_ty(
+ input: ParseStream,
+ allow_plus: bool,
+ allow_group_generic: bool,
+ ) -> Result<Type> {
+ let begin = input.fork();
+
+ if input.peek(token::Group) {
+ let mut group: TypeGroup = input.parse()?;
+ if input.peek(Token![::]) && input.peek3(Ident::peek_any) {
+ if let Type::Path(mut ty) = *group.elem {
+ Path::parse_rest(input, &mut ty.path, false)?;
+ return Ok(Type::Path(ty));
+ } else {
+ return Ok(Type::Path(TypePath {
+ qself: Some(QSelf {
+ lt_token: Token![<](group.group_token.span),
+ position: 0,
+ as_token: None,
+ gt_token: Token![>](group.group_token.span),
+ ty: group.elem,
+ }),
+ path: Path::parse_helper(input, false)?,
+ }));
+ }
+ } else if input.peek(Token![<]) && allow_group_generic
+ || input.peek(Token![::]) && input.peek3(Token![<])
+ {
+ if let Type::Path(mut ty) = *group.elem {
+ let arguments = &mut ty.path.segments.last_mut().unwrap().arguments;
+ if let PathArguments::None = arguments {
+ *arguments = PathArguments::AngleBracketed(input.parse()?);
+ Path::parse_rest(input, &mut ty.path, false)?;
+ return Ok(Type::Path(ty));
+ } else {
+ group.elem = Box::new(Type::Path(ty));
+ }
+ }
+ }
+ return Ok(Type::Group(group));
+ }
+
+ let mut lifetimes = None::<BoundLifetimes>;
+ let mut lookahead = input.lookahead1();
+ if lookahead.peek(Token![for]) {
+ lifetimes = input.parse()?;
+ lookahead = input.lookahead1();
+ if !lookahead.peek(Ident)
+ && !lookahead.peek(Token![fn])
+ && !lookahead.peek(Token![unsafe])
+ && !lookahead.peek(Token![extern])
+ && !lookahead.peek(Token![super])
+ && !lookahead.peek(Token![self])
+ && !lookahead.peek(Token![Self])
+ && !lookahead.peek(Token![crate])
+ || input.peek(Token![dyn])
+ {
+ return Err(lookahead.error());
+ }
+ }
+
+ if lookahead.peek(token::Paren) {
+ let content;
+ let paren_token = parenthesized!(content in input);
+ if content.is_empty() {
+ return Ok(Type::Tuple(TypeTuple {
+ paren_token,
+ elems: Punctuated::new(),
+ }));
+ }
+ if content.peek(Lifetime) {
+ return Ok(Type::Paren(TypeParen {
+ paren_token,
+ elem: Box::new(Type::TraitObject(content.parse()?)),
+ }));
+ }
+ if content.peek(Token![?]) {
+ return Ok(Type::TraitObject(TypeTraitObject {
+ dyn_token: None,
+ bounds: {
+ let mut bounds = Punctuated::new();
+ bounds.push_value(TypeParamBound::Trait(TraitBound {
+ paren_token: Some(paren_token),
+ ..content.parse()?
+ }));
+ while let Some(plus) = input.parse()? {
+ bounds.push_punct(plus);
+ bounds.push_value(input.parse()?);
+ }
+ bounds
+ },
+ }));
+ }
+ let mut first: Type = content.parse()?;
+ if content.peek(Token![,]) {
+ return Ok(Type::Tuple(TypeTuple {
+ paren_token,
+ elems: {
+ let mut elems = Punctuated::new();
+ elems.push_value(first);
+ elems.push_punct(content.parse()?);
+ while !content.is_empty() {
+ elems.push_value(content.parse()?);
+ if content.is_empty() {
+ break;
+ }
+ elems.push_punct(content.parse()?);
+ }
+ elems
+ },
+ }));
+ }
+ if allow_plus && input.peek(Token![+]) {
+ loop {
+ let first = match first {
+ Type::Path(TypePath { qself: None, path }) => {
+ TypeParamBound::Trait(TraitBound {
+ paren_token: Some(paren_token),
+ modifier: TraitBoundModifier::None,
+ lifetimes: None,
+ path,
+ })
+ }
+ Type::TraitObject(TypeTraitObject {
+ dyn_token: None,
+ bounds,
+ }) => {
+ if bounds.len() > 1 || bounds.trailing_punct() {
+ first = Type::TraitObject(TypeTraitObject {
+ dyn_token: None,
+ bounds,
+ });
+ break;
+ }
+ match bounds.into_iter().next().unwrap() {
+ TypeParamBound::Trait(trait_bound) => {
+ TypeParamBound::Trait(TraitBound {
+ paren_token: Some(paren_token),
+ ..trait_bound
+ })
+ }
+ other @ TypeParamBound::Lifetime(_) => other,
+ }
+ }
+ _ => break,
+ };
+ return Ok(Type::TraitObject(TypeTraitObject {
+ dyn_token: None,
+ bounds: {
+ let mut bounds = Punctuated::new();
+ bounds.push_value(first);
+ while let Some(plus) = input.parse()? {
+ bounds.push_punct(plus);
+ bounds.push_value(input.parse()?);
+ }
+ bounds
+ },
+ }));
+ }
+ }
+ Ok(Type::Paren(TypeParen {
+ paren_token,
+ elem: Box::new(first),
+ }))
+ } else if lookahead.peek(Token![fn])
+ || lookahead.peek(Token![unsafe])
+ || lookahead.peek(Token![extern])
+ {
+ let allow_mut_self = true;
+ if let Some(mut bare_fn) = parse_bare_fn(input, allow_mut_self)? {
+ bare_fn.lifetimes = lifetimes;
+ Ok(Type::BareFn(bare_fn))
+ } else {
+ Ok(Type::Verbatim(verbatim::between(begin, input)))
+ }
+ } else if lookahead.peek(Ident)
+ || input.peek(Token![super])
+ || input.peek(Token![self])
+ || input.peek(Token![Self])
+ || input.peek(Token![crate])
+ || lookahead.peek(Token![::])
+ || lookahead.peek(Token![<])
+ {
+ let dyn_token: Option<Token![dyn]> = input.parse()?;
+ if let Some(dyn_token) = dyn_token {
+ let dyn_span = dyn_token.span;
+ let star_token: Option<Token![*]> = input.parse()?;
+ let bounds = TypeTraitObject::parse_bounds(dyn_span, input, allow_plus)?;
+ return Ok(if star_token.is_some() {
+ Type::Verbatim(verbatim::between(begin, input))
+ } else {
+ Type::TraitObject(TypeTraitObject {
+ dyn_token: Some(dyn_token),
+ bounds,
+ })
+ });
+ }
+
+ let ty: TypePath = input.parse()?;
+ if ty.qself.is_some() {
+ return Ok(Type::Path(ty));
+ }
+
+ if input.peek(Token![!]) && !input.peek(Token![!=]) {
+ let mut contains_arguments = false;
+ for segment in &ty.path.segments {
+ match segment.arguments {
+ PathArguments::None => {}
+ PathArguments::AngleBracketed(_) | PathArguments::Parenthesized(_) => {
+ contains_arguments = true;
+ }
+ }
+ }
+
+ if !contains_arguments {
+ let bang_token: Token![!] = input.parse()?;
+ let (delimiter, tokens) = mac::parse_delimiter(input)?;
+ return Ok(Type::Macro(TypeMacro {
+ mac: Macro {
+ path: ty.path,
+ bang_token,
+ delimiter,
+ tokens,
+ },
+ }));
+ }
+ }
+
+ if lifetimes.is_some() || allow_plus && input.peek(Token![+]) {
+ let mut bounds = Punctuated::new();
+ bounds.push_value(TypeParamBound::Trait(TraitBound {
+ paren_token: None,
+ modifier: TraitBoundModifier::None,
+ lifetimes,
+ path: ty.path,
+ }));
+ if allow_plus {
+ while input.peek(Token![+]) {
+ bounds.push_punct(input.parse()?);
+ if !(input.peek(Ident::peek_any)
+ || input.peek(Token![::])
+ || input.peek(Token![?])
+ || input.peek(Lifetime)
+ || input.peek(token::Paren))
+ {
+ break;
+ }
+ bounds.push_value(input.parse()?);
+ }
+ }
+ return Ok(Type::TraitObject(TypeTraitObject {
+ dyn_token: None,
+ bounds,
+ }));
+ }
+
+ Ok(Type::Path(ty))
+ } else if lookahead.peek(token::Bracket) {
+ let content;
+ let bracket_token = bracketed!(content in input);
+ let elem: Type = content.parse()?;
+ if content.peek(Token![;]) {
+ Ok(Type::Array(TypeArray {
+ bracket_token,
+ elem: Box::new(elem),
+ semi_token: content.parse()?,
+ len: content.parse()?,
+ }))
+ } else {
+ Ok(Type::Slice(TypeSlice {
+ bracket_token,
+ elem: Box::new(elem),
+ }))
+ }
+ } else if lookahead.peek(Token![*]) {
+ input.parse().map(Type::Ptr)
+ } else if lookahead.peek(Token![&]) {
+ input.parse().map(Type::Reference)
+ } else if lookahead.peek(Token![!]) && !input.peek(Token![=]) {
+ input.parse().map(Type::Never)
+ } else if lookahead.peek(Token![impl]) {
+ TypeImplTrait::parse(input, allow_plus).map(Type::ImplTrait)
+ } else if lookahead.peek(Token![_]) {
+ input.parse().map(Type::Infer)
+ } else if lookahead.peek(Lifetime) {
+ input.parse().map(Type::TraitObject)
+ } else {
+ Err(lookahead.error())
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeSlice {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let content;
+ Ok(TypeSlice {
+ bracket_token: bracketed!(content in input),
+ elem: content.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeArray {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let content;
+ Ok(TypeArray {
+ bracket_token: bracketed!(content in input),
+ elem: content.parse()?,
+ semi_token: content.parse()?,
+ len: content.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypePtr {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let star_token: Token![*] = input.parse()?;
+
+ let lookahead = input.lookahead1();
+ let (const_token, mutability) = if lookahead.peek(Token![const]) {
+ (Some(input.parse()?), None)
+ } else if lookahead.peek(Token![mut]) {
+ (None, Some(input.parse()?))
+ } else {
+ return Err(lookahead.error());
+ };
+
+ Ok(TypePtr {
+ star_token,
+ const_token,
+ mutability,
+ elem: Box::new(input.call(Type::without_plus)?),
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeReference {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(TypeReference {
+ and_token: input.parse()?,
+ lifetime: input.parse()?,
+ mutability: input.parse()?,
+ // & binds tighter than +, so we don't allow + here.
+ elem: Box::new(input.call(Type::without_plus)?),
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeBareFn {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_mut_self = false;
+ parse_bare_fn(input, allow_mut_self).map(Option::unwrap)
+ }
+ }
+
+ fn parse_bare_fn(input: ParseStream, allow_mut_self: bool) -> Result<Option<TypeBareFn>> {
+ let args;
+ let mut variadic = None;
+ let mut has_mut_self = false;
+
+ let bare_fn = TypeBareFn {
+ lifetimes: input.parse()?,
+ unsafety: input.parse()?,
+ abi: input.parse()?,
+ fn_token: input.parse()?,
+ paren_token: parenthesized!(args in input),
+ inputs: {
+ let mut inputs = Punctuated::new();
+
+ while !args.is_empty() {
+ let attrs = args.call(Attribute::parse_outer)?;
+
+ if inputs.empty_or_trailing() && args.peek(Token![...]) {
+ variadic = Some(Variadic {
+ attrs,
+ dots: args.parse()?,
+ });
+ break;
+ }
+
+ if let Some(arg) = parse_bare_fn_arg(&args, allow_mut_self)? {
+ inputs.push_value(BareFnArg { attrs, ..arg });
+ } else {
+ has_mut_self = true;
+ }
+ if args.is_empty() {
+ break;
+ }
+
+ let comma = args.parse()?;
+ if !has_mut_self {
+ inputs.push_punct(comma);
+ }
+ }
+
+ inputs
+ },
+ variadic,
+ output: input.call(ReturnType::without_plus)?,
+ };
+
+ if has_mut_self {
+ Ok(None)
+ } else {
+ Ok(Some(bare_fn))
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeNever {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(TypeNever {
+ bang_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeInfer {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(TypeInfer {
+ underscore_token: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeTuple {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let content;
+ let paren_token = parenthesized!(content in input);
+
+ if content.is_empty() {
+ return Ok(TypeTuple {
+ paren_token,
+ elems: Punctuated::new(),
+ });
+ }
+
+ let first: Type = content.parse()?;
+ Ok(TypeTuple {
+ paren_token,
+ elems: {
+ let mut elems = Punctuated::new();
+ elems.push_value(first);
+ elems.push_punct(content.parse()?);
+ while !content.is_empty() {
+ elems.push_value(content.parse()?);
+ if content.is_empty() {
+ break;
+ }
+ elems.push_punct(content.parse()?);
+ }
+ elems
+ },
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeMacro {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(TypeMacro {
+ mac: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypePath {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let expr_style = false;
+ let (qself, mut path) = path::parsing::qpath(input, expr_style)?;
+
+ while path.segments.last().unwrap().arguments.is_empty()
+ && (input.peek(token::Paren) || input.peek(Token![::]) && input.peek3(token::Paren))
+ {
+ input.parse::<Option<Token![::]>>()?;
+ let args: ParenthesizedGenericArguments = input.parse()?;
+ let allow_associated_type = cfg!(feature = "full")
+ && match &args.output {
+ ReturnType::Default => true,
+ ReturnType::Type(_, ty) => match **ty {
+ // TODO: probably some of the other kinds allow this too.
+ Type::Paren(_) => true,
+ _ => false,
+ },
+ };
+ let parenthesized = PathArguments::Parenthesized(args);
+ path.segments.last_mut().unwrap().arguments = parenthesized;
+ if allow_associated_type {
+ Path::parse_rest(input, &mut path, expr_style)?;
+ }
+ }
+
+ Ok(TypePath { qself, path })
+ }
+ }
+
+ impl ReturnType {
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn without_plus(input: ParseStream) -> Result<Self> {
+ let allow_plus = false;
+ Self::parse(input, allow_plus)
+ }
+
+ pub(crate) fn parse(input: ParseStream, allow_plus: bool) -> Result<Self> {
+ if input.peek(Token![->]) {
+ let arrow = input.parse()?;
+ let allow_group_generic = true;
+ let ty = ambig_ty(input, allow_plus, allow_group_generic)?;
+ Ok(ReturnType::Type(arrow, Box::new(ty)))
+ } else {
+ Ok(ReturnType::Default)
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for ReturnType {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_plus = true;
+ Self::parse(input, allow_plus)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeTraitObject {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_plus = true;
+ Self::parse(input, allow_plus)
+ }
+ }
+
+ impl TypeTraitObject {
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn without_plus(input: ParseStream) -> Result<Self> {
+ let allow_plus = false;
+ Self::parse(input, allow_plus)
+ }
+
+ // Only allow multiple trait references if allow_plus is true.
+ pub(crate) fn parse(input: ParseStream, allow_plus: bool) -> Result<Self> {
+ let dyn_token: Option<Token![dyn]> = input.parse()?;
+ let dyn_span = match &dyn_token {
+ Some(token) => token.span,
+ None => input.span(),
+ };
+ let bounds = Self::parse_bounds(dyn_span, input, allow_plus)?;
+ Ok(TypeTraitObject { dyn_token, bounds })
+ }
+
+ fn parse_bounds(
+ dyn_span: Span,
+ input: ParseStream,
+ allow_plus: bool,
+ ) -> Result<Punctuated<TypeParamBound, Token![+]>> {
+ let bounds = TypeParamBound::parse_multiple(input, allow_plus)?;
+ let mut last_lifetime_span = None;
+ let mut at_least_one_trait = false;
+ for bound in &bounds {
+ match bound {
+ TypeParamBound::Trait(_) => {
+ at_least_one_trait = true;
+ break;
+ }
+ TypeParamBound::Lifetime(lifetime) => {
+ last_lifetime_span = Some(lifetime.ident.span());
+ }
+ }
+ }
+ // Just lifetimes like `'a + 'b` is not a TraitObject.
+ if !at_least_one_trait {
+ let msg = "at least one trait is required for an object type";
+ return Err(error::new2(dyn_span, last_lifetime_span.unwrap(), msg));
+ }
+ Ok(bounds)
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeImplTrait {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_plus = true;
+ Self::parse(input, allow_plus)
+ }
+ }
+
+ impl TypeImplTrait {
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ pub fn without_plus(input: ParseStream) -> Result<Self> {
+ let allow_plus = false;
+ Self::parse(input, allow_plus)
+ }
+
+ pub(crate) fn parse(input: ParseStream, allow_plus: bool) -> Result<Self> {
+ let impl_token: Token![impl] = input.parse()?;
+ let bounds = TypeParamBound::parse_multiple(input, allow_plus)?;
+ let mut last_lifetime_span = None;
+ let mut at_least_one_trait = false;
+ for bound in &bounds {
+ match bound {
+ TypeParamBound::Trait(_) => {
+ at_least_one_trait = true;
+ break;
+ }
+ TypeParamBound::Lifetime(lifetime) => {
+ last_lifetime_span = Some(lifetime.ident.span());
+ }
+ }
+ }
+ if !at_least_one_trait {
+ let msg = "at least one trait must be specified";
+ return Err(error::new2(
+ impl_token.span,
+ last_lifetime_span.unwrap(),
+ msg,
+ ));
+ }
+ Ok(TypeImplTrait { impl_token, bounds })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeGroup {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let group = crate::group::parse_group(input)?;
+ Ok(TypeGroup {
+ group_token: group.token,
+ elem: group.content.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for TypeParen {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_plus = false;
+ Self::parse(input, allow_plus)
+ }
+ }
+
+ impl TypeParen {
+ fn parse(input: ParseStream, allow_plus: bool) -> Result<Self> {
+ let content;
+ Ok(TypeParen {
+ paren_token: parenthesized!(content in input),
+ elem: Box::new({
+ let allow_group_generic = true;
+ ambig_ty(&content, allow_plus, allow_group_generic)?
+ }),
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for BareFnArg {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let allow_mut_self = false;
+ parse_bare_fn_arg(input, allow_mut_self).map(Option::unwrap)
+ }
+ }
+
+ fn parse_bare_fn_arg(
+ input: ParseStream,
+ mut allow_mut_self: bool,
+ ) -> Result<Option<BareFnArg>> {
+ let mut has_mut_self = false;
+ let arg = BareFnArg {
+ attrs: input.call(Attribute::parse_outer)?,
+ name: {
+ if (input.peek(Ident) || input.peek(Token![_]) || input.peek(Token![self]))
+ && input.peek2(Token![:])
+ && !input.peek2(Token![::])
+ {
+ let name = input.call(Ident::parse_any)?;
+ let colon: Token![:] = input.parse()?;
+ Some((name, colon))
+ } else if allow_mut_self
+ && input.peek(Token![mut])
+ && input.peek2(Token![self])
+ && input.peek3(Token![:])
+ && !input.peek3(Token![::])
+ {
+ has_mut_self = true;
+ allow_mut_self = false;
+ input.parse::<Token![mut]>()?;
+ input.parse::<Token![self]>()?;
+ input.parse::<Token![:]>()?;
+ None
+ } else {
+ None
+ }
+ },
+ ty: if !has_mut_self && input.peek(Token![...]) {
+ let dot3 = input.parse::<Token![...]>()?;
+ let args = vec![
+ TokenTree::Punct(Punct::new('.', Spacing::Joint)),
+ TokenTree::Punct(Punct::new('.', Spacing::Joint)),
+ TokenTree::Punct(Punct::new('.', Spacing::Alone)),
+ ];
+ let tokens: TokenStream = args
+ .into_iter()
+ .zip(&dot3.spans)
+ .map(|(mut arg, span)| {
+ arg.set_span(*span);
+ arg
+ })
+ .collect();
+ Type::Verbatim(tokens)
+ } else if allow_mut_self && input.peek(Token![mut]) && input.peek2(Token![self]) {
+ has_mut_self = true;
+ input.parse::<Token![mut]>()?;
+ Type::Path(TypePath {
+ qself: None,
+ path: input.parse::<Token![self]>()?.into(),
+ })
+ } else {
+ input.parse()?
+ },
+ };
+
+ if has_mut_self {
+ Ok(None)
+ } else {
+ Ok(Some(arg))
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Abi {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(Abi {
+ extern_token: input.parse()?,
+ name: input.parse()?,
+ })
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+ impl Parse for Option<Abi> {
+ fn parse(input: ParseStream) -> Result<Self> {
+ if input.peek(Token![extern]) {
+ input.parse().map(Some)
+ } else {
+ Ok(None)
+ }
+ }
+ }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+ use super::*;
+ use crate::attr::FilterAttrs;
+ use crate::print::TokensOrDefault;
+ use proc_macro2::TokenStream;
+ use quote::{ToTokens, TokenStreamExt};
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeSlice {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.bracket_token.surround(tokens, |tokens| {
+ self.elem.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeArray {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.bracket_token.surround(tokens, |tokens| {
+ self.elem.to_tokens(tokens);
+ self.semi_token.to_tokens(tokens);
+ self.len.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypePtr {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.star_token.to_tokens(tokens);
+ match &self.mutability {
+ Some(tok) => tok.to_tokens(tokens),
+ None => {
+ TokensOrDefault(&self.const_token).to_tokens(tokens);
+ }
+ }
+ self.elem.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeReference {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.and_token.to_tokens(tokens);
+ self.lifetime.to_tokens(tokens);
+ self.mutability.to_tokens(tokens);
+ self.elem.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeBareFn {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.lifetimes.to_tokens(tokens);
+ self.unsafety.to_tokens(tokens);
+ self.abi.to_tokens(tokens);
+ self.fn_token.to_tokens(tokens);
+ self.paren_token.surround(tokens, |tokens| {
+ self.inputs.to_tokens(tokens);
+ if let Some(variadic) = &self.variadic {
+ if !self.inputs.empty_or_trailing() {
+ let span = variadic.dots.spans[0];
+ Token![,](span).to_tokens(tokens);
+ }
+ variadic.to_tokens(tokens);
+ }
+ });
+ self.output.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeNever {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.bang_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeTuple {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.paren_token.surround(tokens, |tokens| {
+ self.elems.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypePath {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ path::printing::print_path(tokens, &self.qself, &self.path);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeTraitObject {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.dyn_token.to_tokens(tokens);
+ self.bounds.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeImplTrait {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.impl_token.to_tokens(tokens);
+ self.bounds.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeGroup {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.group_token.surround(tokens, |tokens| {
+ self.elem.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeParen {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.paren_token.surround(tokens, |tokens| {
+ self.elem.to_tokens(tokens);
+ });
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeInfer {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.underscore_token.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for TypeMacro {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.mac.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for ReturnType {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self {
+ ReturnType::Default => {}
+ ReturnType::Type(arrow, ty) => {
+ arrow.to_tokens(tokens);
+ ty.to_tokens(tokens);
+ }
+ }
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for BareFnArg {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ if let Some((name, colon)) = &self.name {
+ name.to_tokens(tokens);
+ colon.to_tokens(tokens);
+ }
+ self.ty.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Variadic {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append_all(self.attrs.outer());
+ self.dots.to_tokens(tokens);
+ }
+ }
+
+ #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+ impl ToTokens for Abi {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.extern_token.to_tokens(tokens);
+ self.name.to_tokens(tokens);
+ }
+ }
+}
diff --git a/third_party/rust/syn/src/verbatim.rs b/third_party/rust/syn/src/verbatim.rs
new file mode 100644
index 0000000000..58cf68d17a
--- /dev/null
+++ b/third_party/rust/syn/src/verbatim.rs
@@ -0,0 +1,33 @@
+use crate::parse::{ParseBuffer, ParseStream};
+use proc_macro2::{Delimiter, TokenStream};
+use std::cmp::Ordering;
+use std::iter;
+
+pub fn between<'a>(begin: ParseBuffer<'a>, end: ParseStream<'a>) -> TokenStream {
+ let end = end.cursor();
+ let mut cursor = begin.cursor();
+ assert!(crate::buffer::same_buffer(end, cursor));
+
+ let mut tokens = TokenStream::new();
+ while cursor != end {
+ let (tt, next) = cursor.token_tree().unwrap();
+
+ if crate::buffer::cmp_assuming_same_buffer(end, next) == Ordering::Less {
+ // A syntax node can cross the boundary of a None-delimited group
+ // due to such groups being transparent to the parser in most cases.
+ // Any time this occurs the group is known to be semantically
+ // irrelevant. https://github.com/dtolnay/syn/issues/1235
+ if let Some((inside, _span, after)) = cursor.group(Delimiter::None) {
+ assert!(next == after);
+ cursor = inside;
+ continue;
+ } else {
+ panic!("verbatim end must not be inside a delimited group");
+ }
+ }
+
+ tokens.extend(iter::once(tt));
+ cursor = next;
+ }
+ tokens
+}
diff --git a/third_party/rust/syn/src/whitespace.rs b/third_party/rust/syn/src/whitespace.rs
new file mode 100644
index 0000000000..7be082e1a2
--- /dev/null
+++ b/third_party/rust/syn/src/whitespace.rs
@@ -0,0 +1,65 @@
+pub fn skip(mut s: &str) -> &str {
+ 'skip: while !s.is_empty() {
+ let byte = s.as_bytes()[0];
+ if byte == b'/' {
+ if s.starts_with("//")
+ && (!s.starts_with("///") || s.starts_with("////"))
+ && !s.starts_with("//!")
+ {
+ if let Some(i) = s.find('\n') {
+ s = &s[i + 1..];
+ continue;
+ } else {
+ return "";
+ }
+ } else if s.starts_with("/**/") {
+ s = &s[4..];
+ continue;
+ } else if s.starts_with("/*")
+ && (!s.starts_with("/**") || s.starts_with("/***"))
+ && !s.starts_with("/*!")
+ {
+ let mut depth = 0;
+ let bytes = s.as_bytes();
+ let mut i = 0;
+ let upper = bytes.len() - 1;
+ while i < upper {
+ if bytes[i] == b'/' && bytes[i + 1] == b'*' {
+ depth += 1;
+ i += 1; // eat '*'
+ } else if bytes[i] == b'*' && bytes[i + 1] == b'/' {
+ depth -= 1;
+ if depth == 0 {
+ s = &s[i + 2..];
+ continue 'skip;
+ }
+ i += 1; // eat '/'
+ }
+ i += 1;
+ }
+ return s;
+ }
+ }
+ match byte {
+ b' ' | 0x09..=0x0d => {
+ s = &s[1..];
+ continue;
+ }
+ b if b <= 0x7f => {}
+ _ => {
+ let ch = s.chars().next().unwrap();
+ if is_whitespace(ch) {
+ s = &s[ch.len_utf8()..];
+ continue;
+ }
+ }
+ }
+ return s;
+ }
+ s
+}
+
+fn is_whitespace(ch: char) -> bool {
+ // Rust treats left-to-right mark and right-to-left mark as whitespace
+ ch.is_whitespace() || ch == '\u{200e}' || ch == '\u{200f}'
+}
diff --git a/third_party/rust/syn/tests/common/eq.rs b/third_party/rust/syn/tests/common/eq.rs
new file mode 100644
index 0000000000..41d6d4118c
--- /dev/null
+++ b/third_party/rust/syn/tests/common/eq.rs
@@ -0,0 +1,806 @@
+#![allow(unused_macro_rules)]
+
+extern crate rustc_ast;
+extern crate rustc_data_structures;
+extern crate rustc_span;
+extern crate thin_vec;
+
+use rustc_ast::ast::AngleBracketedArg;
+use rustc_ast::ast::AngleBracketedArgs;
+use rustc_ast::ast::AnonConst;
+use rustc_ast::ast::Arm;
+use rustc_ast::ast::AssocConstraint;
+use rustc_ast::ast::AssocConstraintKind;
+use rustc_ast::ast::AssocItemKind;
+use rustc_ast::ast::Async;
+use rustc_ast::ast::AttrArgs;
+use rustc_ast::ast::AttrArgsEq;
+use rustc_ast::ast::AttrId;
+use rustc_ast::ast::AttrItem;
+use rustc_ast::ast::AttrKind;
+use rustc_ast::ast::AttrStyle;
+use rustc_ast::ast::Attribute;
+use rustc_ast::ast::BareFnTy;
+use rustc_ast::ast::BinOpKind;
+use rustc_ast::ast::BindingAnnotation;
+use rustc_ast::ast::Block;
+use rustc_ast::ast::BlockCheckMode;
+use rustc_ast::ast::BorrowKind;
+use rustc_ast::ast::ByRef;
+use rustc_ast::ast::CaptureBy;
+use rustc_ast::ast::Closure;
+use rustc_ast::ast::ClosureBinder;
+use rustc_ast::ast::Const;
+use rustc_ast::ast::Crate;
+use rustc_ast::ast::Defaultness;
+use rustc_ast::ast::DelimArgs;
+use rustc_ast::ast::EnumDef;
+use rustc_ast::ast::Expr;
+use rustc_ast::ast::ExprField;
+use rustc_ast::ast::ExprKind;
+use rustc_ast::ast::Extern;
+use rustc_ast::ast::FieldDef;
+use rustc_ast::ast::FloatTy;
+use rustc_ast::ast::Fn;
+use rustc_ast::ast::FnDecl;
+use rustc_ast::ast::FnHeader;
+use rustc_ast::ast::FnRetTy;
+use rustc_ast::ast::FnSig;
+use rustc_ast::ast::ForeignItemKind;
+use rustc_ast::ast::ForeignMod;
+use rustc_ast::ast::GenericArg;
+use rustc_ast::ast::GenericArgs;
+use rustc_ast::ast::GenericBound;
+use rustc_ast::ast::GenericParam;
+use rustc_ast::ast::GenericParamKind;
+use rustc_ast::ast::Generics;
+use rustc_ast::ast::Impl;
+use rustc_ast::ast::ImplPolarity;
+use rustc_ast::ast::Inline;
+use rustc_ast::ast::InlineAsm;
+use rustc_ast::ast::InlineAsmOperand;
+use rustc_ast::ast::InlineAsmOptions;
+use rustc_ast::ast::InlineAsmRegOrRegClass;
+use rustc_ast::ast::InlineAsmSym;
+use rustc_ast::ast::InlineAsmTemplatePiece;
+use rustc_ast::ast::IntTy;
+use rustc_ast::ast::IsAuto;
+use rustc_ast::ast::Item;
+use rustc_ast::ast::ItemKind;
+use rustc_ast::ast::Label;
+use rustc_ast::ast::Lifetime;
+use rustc_ast::ast::LitFloatType;
+use rustc_ast::ast::LitIntType;
+use rustc_ast::ast::LitKind;
+use rustc_ast::ast::Local;
+use rustc_ast::ast::LocalKind;
+use rustc_ast::ast::MacCall;
+use rustc_ast::ast::MacCallStmt;
+use rustc_ast::ast::MacDelimiter;
+use rustc_ast::ast::MacStmtStyle;
+use rustc_ast::ast::MacroDef;
+use rustc_ast::ast::MetaItemLit;
+use rustc_ast::ast::MethodCall;
+use rustc_ast::ast::ModKind;
+use rustc_ast::ast::ModSpans;
+use rustc_ast::ast::Movability;
+use rustc_ast::ast::MutTy;
+use rustc_ast::ast::Mutability;
+use rustc_ast::ast::NodeId;
+use rustc_ast::ast::NormalAttr;
+use rustc_ast::ast::Param;
+use rustc_ast::ast::ParenthesizedArgs;
+use rustc_ast::ast::Pat;
+use rustc_ast::ast::PatField;
+use rustc_ast::ast::PatKind;
+use rustc_ast::ast::Path;
+use rustc_ast::ast::PathSegment;
+use rustc_ast::ast::PolyTraitRef;
+use rustc_ast::ast::QSelf;
+use rustc_ast::ast::RangeEnd;
+use rustc_ast::ast::RangeLimits;
+use rustc_ast::ast::RangeSyntax;
+use rustc_ast::ast::Stmt;
+use rustc_ast::ast::StmtKind;
+use rustc_ast::ast::StrLit;
+use rustc_ast::ast::StrStyle;
+use rustc_ast::ast::StructExpr;
+use rustc_ast::ast::StructRest;
+use rustc_ast::ast::Term;
+use rustc_ast::ast::Trait;
+use rustc_ast::ast::TraitBoundModifier;
+use rustc_ast::ast::TraitObjectSyntax;
+use rustc_ast::ast::TraitRef;
+use rustc_ast::ast::Ty;
+use rustc_ast::ast::TyAlias;
+use rustc_ast::ast::TyAliasWhereClause;
+use rustc_ast::ast::TyKind;
+use rustc_ast::ast::UintTy;
+use rustc_ast::ast::UnOp;
+use rustc_ast::ast::Unsafe;
+use rustc_ast::ast::UnsafeSource;
+use rustc_ast::ast::UseTree;
+use rustc_ast::ast::UseTreeKind;
+use rustc_ast::ast::Variant;
+use rustc_ast::ast::VariantData;
+use rustc_ast::ast::Visibility;
+use rustc_ast::ast::VisibilityKind;
+use rustc_ast::ast::WhereBoundPredicate;
+use rustc_ast::ast::WhereClause;
+use rustc_ast::ast::WhereEqPredicate;
+use rustc_ast::ast::WherePredicate;
+use rustc_ast::ast::WhereRegionPredicate;
+use rustc_ast::ptr::P;
+use rustc_ast::token::{self, CommentKind, Delimiter, Lit, Nonterminal, Token, TokenKind};
+use rustc_ast::tokenstream::{
+ AttrTokenStream, AttrTokenTree, AttributesData, DelimSpan, LazyAttrTokenStream, Spacing,
+ TokenStream, TokenTree,
+};
+use rustc_data_structures::sync::Lrc;
+use rustc_span::source_map::Spanned;
+use rustc_span::symbol::{sym, Ident};
+use rustc_span::{Span, Symbol, SyntaxContext, DUMMY_SP};
+use thin_vec::ThinVec;
+
+pub trait SpanlessEq {
+ fn eq(&self, other: &Self) -> bool;
+}
+
+impl<T: ?Sized + SpanlessEq> SpanlessEq for Box<T> {
+ fn eq(&self, other: &Self) -> bool {
+ SpanlessEq::eq(&**self, &**other)
+ }
+}
+
+impl<T: ?Sized + SpanlessEq> SpanlessEq for P<T> {
+ fn eq(&self, other: &Self) -> bool {
+ SpanlessEq::eq(&**self, &**other)
+ }
+}
+
+impl<T: ?Sized + SpanlessEq> SpanlessEq for Lrc<T> {
+ fn eq(&self, other: &Self) -> bool {
+ SpanlessEq::eq(&**self, &**other)
+ }
+}
+
+impl<T: SpanlessEq> SpanlessEq for Option<T> {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (None, None) => true,
+ (Some(this), Some(other)) => SpanlessEq::eq(this, other),
+ _ => false,
+ }
+ }
+}
+
+impl<T: SpanlessEq> SpanlessEq for [T] {
+ fn eq(&self, other: &Self) -> bool {
+ self.len() == other.len() && self.iter().zip(other).all(|(a, b)| SpanlessEq::eq(a, b))
+ }
+}
+
+impl<T: SpanlessEq> SpanlessEq for Vec<T> {
+ fn eq(&self, other: &Self) -> bool {
+ <[T] as SpanlessEq>::eq(self, other)
+ }
+}
+
+impl<T: SpanlessEq> SpanlessEq for ThinVec<T> {
+ fn eq(&self, other: &Self) -> bool {
+ self.len() == other.len()
+ && self
+ .iter()
+ .zip(other.iter())
+ .all(|(a, b)| SpanlessEq::eq(a, b))
+ }
+}
+
+impl<T: SpanlessEq> SpanlessEq for Spanned<T> {
+ fn eq(&self, other: &Self) -> bool {
+ SpanlessEq::eq(&self.node, &other.node)
+ }
+}
+
+impl<A: SpanlessEq, B: SpanlessEq> SpanlessEq for (A, B) {
+ fn eq(&self, other: &Self) -> bool {
+ SpanlessEq::eq(&self.0, &other.0) && SpanlessEq::eq(&self.1, &other.1)
+ }
+}
+
+impl<A: SpanlessEq, B: SpanlessEq, C: SpanlessEq> SpanlessEq for (A, B, C) {
+ fn eq(&self, other: &Self) -> bool {
+ SpanlessEq::eq(&self.0, &other.0)
+ && SpanlessEq::eq(&self.1, &other.1)
+ && SpanlessEq::eq(&self.2, &other.2)
+ }
+}
+
+macro_rules! spanless_eq_true {
+ ($name:ty) => {
+ impl SpanlessEq for $name {
+ fn eq(&self, _other: &Self) -> bool {
+ true
+ }
+ }
+ };
+}
+
+spanless_eq_true!(Span);
+spanless_eq_true!(DelimSpan);
+spanless_eq_true!(AttrId);
+spanless_eq_true!(NodeId);
+spanless_eq_true!(SyntaxContext);
+spanless_eq_true!(Spacing);
+
+macro_rules! spanless_eq_partial_eq {
+ ($name:ty) => {
+ impl SpanlessEq for $name {
+ fn eq(&self, other: &Self) -> bool {
+ PartialEq::eq(self, other)
+ }
+ }
+ };
+}
+
+spanless_eq_partial_eq!(bool);
+spanless_eq_partial_eq!(u8);
+spanless_eq_partial_eq!(u16);
+spanless_eq_partial_eq!(u128);
+spanless_eq_partial_eq!(usize);
+spanless_eq_partial_eq!(char);
+spanless_eq_partial_eq!(String);
+spanless_eq_partial_eq!(Symbol);
+spanless_eq_partial_eq!(CommentKind);
+spanless_eq_partial_eq!(Delimiter);
+spanless_eq_partial_eq!(InlineAsmOptions);
+spanless_eq_partial_eq!(token::LitKind);
+
+macro_rules! spanless_eq_struct {
+ {
+ $($name:ident)::+ $(<$param:ident>)?
+ $([$field:tt $this:ident $other:ident])*
+ $(![$ignore:tt])*;
+ } => {
+ impl $(<$param: SpanlessEq>)* SpanlessEq for $($name)::+ $(<$param>)* {
+ fn eq(&self, other: &Self) -> bool {
+ let $($name)::+ { $($field: $this,)* $($ignore: _,)* } = self;
+ let $($name)::+ { $($field: $other,)* $($ignore: _,)* } = other;
+ true $(&& SpanlessEq::eq($this, $other))*
+ }
+ }
+ };
+
+ {
+ $($name:ident)::+ $(<$param:ident>)?
+ $([$field:tt $this:ident $other:ident])*
+ $(![$ignore:tt])*;
+ !$next:tt
+ $($rest:tt)*
+ } => {
+ spanless_eq_struct! {
+ $($name)::+ $(<$param>)*
+ $([$field $this $other])*
+ $(![$ignore])*
+ ![$next];
+ $($rest)*
+ }
+ };
+
+ {
+ $($name:ident)::+ $(<$param:ident>)?
+ $([$field:tt $this:ident $other:ident])*
+ $(![$ignore:tt])*;
+ $next:tt
+ $($rest:tt)*
+ } => {
+ spanless_eq_struct! {
+ $($name)::+ $(<$param>)*
+ $([$field $this $other])*
+ [$next this other]
+ $(![$ignore])*;
+ $($rest)*
+ }
+ };
+}
+
+macro_rules! spanless_eq_enum {
+ {
+ $($name:ident)::+;
+ $([$($variant:ident)::+; $([$field:tt $this:ident $other:ident])* $(![$ignore:tt])*])*
+ } => {
+ impl SpanlessEq for $($name)::+ {
+ fn eq(&self, other: &Self) -> bool {
+ match self {
+ $(
+ $($variant)::+ { .. } => {}
+ )*
+ }
+ #[allow(unreachable_patterns)]
+ match (self, other) {
+ $(
+ (
+ $($variant)::+ { $($field: $this,)* $($ignore: _,)* },
+ $($variant)::+ { $($field: $other,)* $($ignore: _,)* },
+ ) => {
+ true $(&& SpanlessEq::eq($this, $other))*
+ }
+ )*
+ _ => false,
+ }
+ }
+ }
+ };
+
+ {
+ $($name:ident)::+;
+ $([$($variant:ident)::+; $($fields:tt)*])*
+ $next:ident [$([$($named:tt)*])* $(![$ignore:tt])*] (!$i:tt $($field:tt)*)
+ $($rest:tt)*
+ } => {
+ spanless_eq_enum! {
+ $($name)::+;
+ $([$($variant)::+; $($fields)*])*
+ $next [$([$($named)*])* $(![$ignore])* ![$i]] ($($field)*)
+ $($rest)*
+ }
+ };
+
+ {
+ $($name:ident)::+;
+ $([$($variant:ident)::+; $($fields:tt)*])*
+ $next:ident [$([$($named:tt)*])* $(![$ignore:tt])*] ($i:tt $($field:tt)*)
+ $($rest:tt)*
+ } => {
+ spanless_eq_enum! {
+ $($name)::+;
+ $([$($variant)::+; $($fields)*])*
+ $next [$([$($named)*])* [$i this other] $(![$ignore])*] ($($field)*)
+ $($rest)*
+ }
+ };
+
+ {
+ $($name:ident)::+;
+ $([$($variant:ident)::+; $($fields:tt)*])*
+ $next:ident [$($named:tt)*] ()
+ $($rest:tt)*
+ } => {
+ spanless_eq_enum! {
+ $($name)::+;
+ $([$($variant)::+; $($fields)*])*
+ [$($name)::+::$next; $($named)*]
+ $($rest)*
+ }
+ };
+
+ {
+ $($name:ident)::+;
+ $([$($variant:ident)::+; $($fields:tt)*])*
+ $next:ident ($($field:tt)*)
+ $($rest:tt)*
+ } => {
+ spanless_eq_enum! {
+ $($name)::+;
+ $([$($variant)::+; $($fields)*])*
+ $next [] ($($field)*)
+ $($rest)*
+ }
+ };
+
+ {
+ $($name:ident)::+;
+ $([$($variant:ident)::+; $($fields:tt)*])*
+ $next:ident
+ $($rest:tt)*
+ } => {
+ spanless_eq_enum! {
+ $($name)::+;
+ $([$($variant)::+; $($fields)*])*
+ [$($name)::+::$next;]
+ $($rest)*
+ }
+ };
+}
+
+spanless_eq_struct!(AngleBracketedArgs; span args);
+spanless_eq_struct!(AnonConst; id value);
+spanless_eq_struct!(Arm; attrs pat guard body span id is_placeholder);
+spanless_eq_struct!(AssocConstraint; id ident gen_args kind span);
+spanless_eq_struct!(AttrItem; path args tokens);
+spanless_eq_struct!(AttrTokenStream; 0);
+spanless_eq_struct!(Attribute; kind id style span);
+spanless_eq_struct!(AttributesData; attrs tokens);
+spanless_eq_struct!(BareFnTy; unsafety ext generic_params decl decl_span);
+spanless_eq_struct!(BindingAnnotation; 0 1);
+spanless_eq_struct!(Block; stmts id rules span tokens could_be_bare_literal);
+spanless_eq_struct!(Closure; binder capture_clause asyncness movability fn_decl body !fn_decl_span);
+spanless_eq_struct!(Crate; attrs items spans id is_placeholder);
+spanless_eq_struct!(DelimArgs; dspan delim tokens);
+spanless_eq_struct!(EnumDef; variants);
+spanless_eq_struct!(Expr; id kind span attrs !tokens);
+spanless_eq_struct!(ExprField; attrs id span ident expr is_shorthand is_placeholder);
+spanless_eq_struct!(FieldDef; attrs id span vis ident ty is_placeholder);
+spanless_eq_struct!(FnDecl; inputs output);
+spanless_eq_struct!(FnHeader; constness asyncness unsafety ext);
+spanless_eq_struct!(Fn; defaultness generics sig body);
+spanless_eq_struct!(FnSig; header decl span);
+spanless_eq_struct!(ForeignMod; unsafety abi items);
+spanless_eq_struct!(GenericParam; id ident attrs bounds is_placeholder kind !colon_span);
+spanless_eq_struct!(Generics; params where_clause span);
+spanless_eq_struct!(Impl; defaultness unsafety generics constness polarity of_trait self_ty items);
+spanless_eq_struct!(InlineAsm; template template_strs operands clobber_abis options line_spans);
+spanless_eq_struct!(InlineAsmSym; id qself path);
+spanless_eq_struct!(Item<K>; attrs id span vis ident kind !tokens);
+spanless_eq_struct!(Label; ident);
+spanless_eq_struct!(Lifetime; id ident);
+spanless_eq_struct!(Lit; kind symbol suffix);
+spanless_eq_struct!(Local; pat ty kind id span attrs !tokens);
+spanless_eq_struct!(MacCall; path args prior_type_ascription);
+spanless_eq_struct!(MacCallStmt; mac style attrs tokens);
+spanless_eq_struct!(MacroDef; body macro_rules);
+spanless_eq_struct!(MetaItemLit; token_lit kind span);
+spanless_eq_struct!(MethodCall; seg receiver args !span);
+spanless_eq_struct!(ModSpans; !inner_span !inject_use_span);
+spanless_eq_struct!(MutTy; ty mutbl);
+spanless_eq_struct!(NormalAttr; item tokens);
+spanless_eq_struct!(ParenthesizedArgs; span inputs inputs_span output);
+spanless_eq_struct!(Pat; id kind span tokens);
+spanless_eq_struct!(PatField; ident pat is_shorthand attrs id span is_placeholder);
+spanless_eq_struct!(Path; span segments tokens);
+spanless_eq_struct!(PathSegment; ident id args);
+spanless_eq_struct!(PolyTraitRef; bound_generic_params trait_ref span);
+spanless_eq_struct!(QSelf; ty path_span position);
+spanless_eq_struct!(Stmt; id kind span);
+spanless_eq_struct!(StrLit; style symbol suffix span symbol_unescaped);
+spanless_eq_struct!(StructExpr; qself path fields rest);
+spanless_eq_struct!(Token; kind span);
+spanless_eq_struct!(Trait; unsafety is_auto generics bounds items);
+spanless_eq_struct!(TraitRef; path ref_id);
+spanless_eq_struct!(Ty; id kind span tokens);
+spanless_eq_struct!(TyAlias; defaultness generics where_clauses !where_predicates_split bounds ty);
+spanless_eq_struct!(TyAliasWhereClause; !0 1);
+spanless_eq_struct!(UseTree; prefix kind span);
+spanless_eq_struct!(Variant; attrs id span !vis ident data disr_expr is_placeholder);
+spanless_eq_struct!(Visibility; kind span tokens);
+spanless_eq_struct!(WhereBoundPredicate; span bound_generic_params bounded_ty bounds);
+spanless_eq_struct!(WhereClause; has_where_token predicates span);
+spanless_eq_struct!(WhereEqPredicate; span lhs_ty rhs_ty);
+spanless_eq_struct!(WhereRegionPredicate; span lifetime bounds);
+spanless_eq_enum!(AngleBracketedArg; Arg(0) Constraint(0));
+spanless_eq_enum!(AssocItemKind; Const(0 1 2) Fn(0) Type(0) MacCall(0));
+spanless_eq_enum!(AssocConstraintKind; Equality(term) Bound(bounds));
+spanless_eq_enum!(Async; Yes(span closure_id return_impl_trait_id) No);
+spanless_eq_enum!(AttrArgs; Empty Delimited(0) Eq(0 1));
+spanless_eq_enum!(AttrArgsEq; Ast(0) Hir(0));
+spanless_eq_enum!(AttrStyle; Outer Inner);
+spanless_eq_enum!(AttrTokenTree; Token(0 1) Delimited(0 1 2) Attributes(0));
+spanless_eq_enum!(BinOpKind; Add Sub Mul Div Rem And Or BitXor BitAnd BitOr Shl Shr Eq Lt Le Ne Ge Gt);
+spanless_eq_enum!(BlockCheckMode; Default Unsafe(0));
+spanless_eq_enum!(BorrowKind; Ref Raw);
+spanless_eq_enum!(ByRef; Yes No);
+spanless_eq_enum!(CaptureBy; Value Ref);
+spanless_eq_enum!(ClosureBinder; NotPresent For(span generic_params));
+spanless_eq_enum!(Const; Yes(0) No);
+spanless_eq_enum!(Defaultness; Default(0) Final);
+spanless_eq_enum!(Extern; None Implicit(0) Explicit(0 1));
+spanless_eq_enum!(FloatTy; F32 F64);
+spanless_eq_enum!(FnRetTy; Default(0) Ty(0));
+spanless_eq_enum!(ForeignItemKind; Static(0 1 2) Fn(0) TyAlias(0) MacCall(0));
+spanless_eq_enum!(GenericArg; Lifetime(0) Type(0) Const(0));
+spanless_eq_enum!(GenericArgs; AngleBracketed(0) Parenthesized(0));
+spanless_eq_enum!(GenericBound; Trait(0 1) Outlives(0));
+spanless_eq_enum!(GenericParamKind; Lifetime Type(default) Const(ty kw_span default));
+spanless_eq_enum!(ImplPolarity; Positive Negative(0));
+spanless_eq_enum!(Inline; Yes No);
+spanless_eq_enum!(InlineAsmRegOrRegClass; Reg(0) RegClass(0));
+spanless_eq_enum!(InlineAsmTemplatePiece; String(0) Placeholder(operand_idx modifier span));
+spanless_eq_enum!(IntTy; Isize I8 I16 I32 I64 I128);
+spanless_eq_enum!(IsAuto; Yes No);
+spanless_eq_enum!(LitFloatType; Suffixed(0) Unsuffixed);
+spanless_eq_enum!(LitIntType; Signed(0) Unsigned(0) Unsuffixed);
+spanless_eq_enum!(LocalKind; Decl Init(0) InitElse(0 1));
+spanless_eq_enum!(MacDelimiter; Parenthesis Bracket Brace);
+spanless_eq_enum!(MacStmtStyle; Semicolon Braces NoBraces);
+spanless_eq_enum!(ModKind; Loaded(0 1 2) Unloaded);
+spanless_eq_enum!(Movability; Static Movable);
+spanless_eq_enum!(Mutability; Mut Not);
+spanless_eq_enum!(RangeEnd; Included(0) Excluded);
+spanless_eq_enum!(RangeLimits; HalfOpen Closed);
+spanless_eq_enum!(StmtKind; Local(0) Item(0) Expr(0) Semi(0) Empty MacCall(0));
+spanless_eq_enum!(StrStyle; Cooked Raw(0));
+spanless_eq_enum!(StructRest; Base(0) Rest(0) None);
+spanless_eq_enum!(Term; Ty(0) Const(0));
+spanless_eq_enum!(TokenTree; Token(0 1) Delimited(0 1 2));
+spanless_eq_enum!(TraitBoundModifier; None Maybe MaybeConst MaybeConstMaybe);
+spanless_eq_enum!(TraitObjectSyntax; Dyn DynStar None);
+spanless_eq_enum!(UintTy; Usize U8 U16 U32 U64 U128);
+spanless_eq_enum!(UnOp; Deref Not Neg);
+spanless_eq_enum!(Unsafe; Yes(0) No);
+spanless_eq_enum!(UnsafeSource; CompilerGenerated UserProvided);
+spanless_eq_enum!(UseTreeKind; Simple(0) Nested(0) Glob);
+spanless_eq_enum!(VariantData; Struct(0 1) Tuple(0 1) Unit(0));
+spanless_eq_enum!(VisibilityKind; Public Restricted(path id shorthand) Inherited);
+spanless_eq_enum!(WherePredicate; BoundPredicate(0) RegionPredicate(0) EqPredicate(0));
+spanless_eq_enum!(ExprKind; Box(0) Array(0) ConstBlock(0) Call(0 1)
+ MethodCall(0) Tup(0) Binary(0 1 2) Unary(0 1) Lit(0) Cast(0 1) Type(0 1)
+ Let(0 1 2) If(0 1 2) While(0 1 2) ForLoop(0 1 2 3) Loop(0 1 2) Match(0 1)
+ Closure(0) Block(0 1) Async(0 1 2) Await(0) TryBlock(0) Assign(0 1 2)
+ AssignOp(0 1 2) Field(0 1) Index(0 1) Underscore Range(0 1 2) Path(0 1)
+ AddrOf(0 1 2) Break(0 1) Continue(0) Ret(0) InlineAsm(0) MacCall(0)
+ Struct(0) Repeat(0 1) Paren(0) Try(0) Yield(0) Yeet(0) IncludedBytes(0)
+ Err);
+spanless_eq_enum!(InlineAsmOperand; In(reg expr) Out(reg late expr)
+ InOut(reg late expr) SplitInOut(reg late in_expr out_expr) Const(anon_const)
+ Sym(sym));
+spanless_eq_enum!(ItemKind; ExternCrate(0) Use(0) Static(0 1 2) Const(0 1 2)
+ Fn(0) Mod(0 1) ForeignMod(0) GlobalAsm(0) TyAlias(0) Enum(0 1) Struct(0 1)
+ Union(0 1) Trait(0) TraitAlias(0 1) Impl(0) MacCall(0) MacroDef(0));
+spanless_eq_enum!(LitKind; Str(0 1) ByteStr(0) Byte(0) Char(0) Int(0 1)
+ Float(0 1) Bool(0) Err);
+spanless_eq_enum!(PatKind; Wild Ident(0 1 2) Struct(0 1 2 3) TupleStruct(0 1 2)
+ Or(0) Path(0 1) Tuple(0) Box(0) Ref(0 1) Lit(0) Range(0 1 2) Slice(0) Rest
+ Paren(0) MacCall(0));
+spanless_eq_enum!(TyKind; Slice(0) Array(0 1) Ptr(0) Rptr(0 1) BareFn(0) Never
+ Tup(0) Path(0 1) TraitObject(0 1) ImplTrait(0 1) Paren(0) Typeof(0) Infer
+ ImplicitSelf MacCall(0) Err CVarArgs);
+
+impl SpanlessEq for Ident {
+ fn eq(&self, other: &Self) -> bool {
+ self.as_str() == other.as_str()
+ }
+}
+
+impl SpanlessEq for RangeSyntax {
+ fn eq(&self, _other: &Self) -> bool {
+ match self {
+ RangeSyntax::DotDotDot | RangeSyntax::DotDotEq => true,
+ }
+ }
+}
+
+impl SpanlessEq for Param {
+ fn eq(&self, other: &Self) -> bool {
+ let Param {
+ attrs,
+ ty,
+ pat,
+ id,
+ span: _,
+ is_placeholder,
+ } = self;
+ let Param {
+ attrs: attrs2,
+ ty: ty2,
+ pat: pat2,
+ id: id2,
+ span: _,
+ is_placeholder: is_placeholder2,
+ } = other;
+ SpanlessEq::eq(id, id2)
+ && SpanlessEq::eq(is_placeholder, is_placeholder2)
+ && (matches!(ty.kind, TyKind::Err)
+ || matches!(ty2.kind, TyKind::Err)
+ || SpanlessEq::eq(attrs, attrs2)
+ && SpanlessEq::eq(ty, ty2)
+ && SpanlessEq::eq(pat, pat2))
+ }
+}
+
+impl SpanlessEq for TokenKind {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (TokenKind::Literal(this), TokenKind::Literal(other)) => SpanlessEq::eq(this, other),
+ (TokenKind::DotDotEq, _) | (TokenKind::DotDotDot, _) => match other {
+ TokenKind::DotDotEq | TokenKind::DotDotDot => true,
+ _ => false,
+ },
+ (TokenKind::Interpolated(this), TokenKind::Interpolated(other)) => {
+ match (this.as_ref(), other.as_ref()) {
+ (Nonterminal::NtExpr(this), Nonterminal::NtExpr(other)) => {
+ SpanlessEq::eq(this, other)
+ }
+ _ => this == other,
+ }
+ }
+ _ => self == other,
+ }
+ }
+}
+
+impl SpanlessEq for TokenStream {
+ fn eq(&self, other: &Self) -> bool {
+ let mut this_trees = self.trees();
+ let mut other_trees = other.trees();
+ loop {
+ let this = match this_trees.next() {
+ None => return other_trees.next().is_none(),
+ Some(tree) => tree,
+ };
+ let other = match other_trees.next() {
+ None => return false,
+ Some(tree) => tree,
+ };
+ if SpanlessEq::eq(this, other) {
+ continue;
+ }
+ if let (TokenTree::Token(this, _), TokenTree::Token(other, _)) = (this, other) {
+ if match (&this.kind, &other.kind) {
+ (TokenKind::Literal(this), TokenKind::Literal(other)) => {
+ SpanlessEq::eq(this, other)
+ }
+ (TokenKind::DocComment(_kind, style, symbol), TokenKind::Pound) => {
+ doc_comment(*style, *symbol, &mut other_trees)
+ }
+ (TokenKind::Pound, TokenKind::DocComment(_kind, style, symbol)) => {
+ doc_comment(*style, *symbol, &mut this_trees)
+ }
+ _ => false,
+ } {
+ continue;
+ }
+ }
+ return false;
+ }
+ }
+}
+
+fn doc_comment<'a>(
+ style: AttrStyle,
+ unescaped: Symbol,
+ trees: &mut impl Iterator<Item = &'a TokenTree>,
+) -> bool {
+ if match style {
+ AttrStyle::Outer => false,
+ AttrStyle::Inner => true,
+ } {
+ match trees.next() {
+ Some(TokenTree::Token(
+ Token {
+ kind: TokenKind::Not,
+ span: _,
+ },
+ _spacing,
+ )) => {}
+ _ => return false,
+ }
+ }
+ let stream = match trees.next() {
+ Some(TokenTree::Delimited(_span, Delimiter::Bracket, stream)) => stream,
+ _ => return false,
+ };
+ let mut trees = stream.trees();
+ match trees.next() {
+ Some(TokenTree::Token(
+ Token {
+ kind: TokenKind::Ident(symbol, false),
+ span: _,
+ },
+ _spacing,
+ )) if *symbol == sym::doc => {}
+ _ => return false,
+ }
+ match trees.next() {
+ Some(TokenTree::Token(
+ Token {
+ kind: TokenKind::Eq,
+ span: _,
+ },
+ _spacing,
+ )) => {}
+ _ => return false,
+ }
+ match trees.next() {
+ Some(TokenTree::Token(token, _spacing)) => {
+ is_escaped_literal_token(token, unescaped) && trees.next().is_none()
+ }
+ _ => false,
+ }
+}
+
+fn is_escaped_literal_token(token: &Token, unescaped: Symbol) -> bool {
+ match token {
+ Token {
+ kind: TokenKind::Literal(lit),
+ span: _,
+ } => match MetaItemLit::from_token_lit(*lit, DUMMY_SP) {
+ Ok(lit) => is_escaped_literal_meta_item_lit(&lit, unescaped),
+ Err(_) => false,
+ },
+ Token {
+ kind: TokenKind::Interpolated(nonterminal),
+ span: _,
+ } => match nonterminal.as_ref() {
+ Nonterminal::NtExpr(expr) => match &expr.kind {
+ ExprKind::Lit(lit) => is_escaped_lit(lit, unescaped),
+ _ => false,
+ },
+ _ => false,
+ },
+ _ => false,
+ }
+}
+
+fn is_escaped_literal_attr_args(value: &AttrArgsEq, unescaped: Symbol) -> bool {
+ match value {
+ AttrArgsEq::Ast(expr) => match &expr.kind {
+ ExprKind::Lit(lit) => is_escaped_lit(lit, unescaped),
+ _ => false,
+ },
+ AttrArgsEq::Hir(lit) => is_escaped_literal_meta_item_lit(lit, unescaped),
+ }
+}
+
+fn is_escaped_literal_meta_item_lit(lit: &MetaItemLit, unescaped: Symbol) -> bool {
+ match lit {
+ MetaItemLit {
+ token_lit:
+ Lit {
+ kind: token::LitKind::Str,
+ symbol: _,
+ suffix: None,
+ },
+ kind,
+ span: _,
+ } => is_escaped_lit_kind(kind, unescaped),
+ _ => false,
+ }
+}
+
+fn is_escaped_lit(lit: &Lit, unescaped: Symbol) -> bool {
+ match lit {
+ Lit {
+ kind: token::LitKind::Str,
+ symbol: _,
+ suffix: None,
+ } => match LitKind::from_token_lit(*lit) {
+ Ok(lit_kind) => is_escaped_lit_kind(&lit_kind, unescaped),
+ _ => false,
+ },
+ _ => false,
+ }
+}
+
+fn is_escaped_lit_kind(kind: &LitKind, unescaped: Symbol) -> bool {
+ match kind {
+ LitKind::Str(symbol, StrStyle::Cooked) => {
+ symbol.as_str().replace('\r', "") == unescaped.as_str().replace('\r', "")
+ }
+ _ => false,
+ }
+}
+
+impl SpanlessEq for LazyAttrTokenStream {
+ fn eq(&self, other: &Self) -> bool {
+ let this = self.to_attr_token_stream();
+ let other = other.to_attr_token_stream();
+ SpanlessEq::eq(&this, &other)
+ }
+}
+
+impl SpanlessEq for AttrKind {
+ fn eq(&self, other: &Self) -> bool {
+ match (self, other) {
+ (AttrKind::Normal(normal), AttrKind::Normal(normal2)) => {
+ SpanlessEq::eq(normal, normal2)
+ }
+ (AttrKind::DocComment(kind, symbol), AttrKind::DocComment(kind2, symbol2)) => {
+ SpanlessEq::eq(kind, kind2) && SpanlessEq::eq(symbol, symbol2)
+ }
+ (AttrKind::DocComment(kind, unescaped), AttrKind::Normal(normal2)) => {
+ match kind {
+ CommentKind::Line | CommentKind::Block => {}
+ }
+ let path = Path::from_ident(Ident::with_dummy_span(sym::doc));
+ SpanlessEq::eq(&path, &normal2.item.path)
+ && match &normal2.item.args {
+ AttrArgs::Empty | AttrArgs::Delimited(_) => false,
+ AttrArgs::Eq(_span, value) => {
+ is_escaped_literal_attr_args(value, *unescaped)
+ }
+ }
+ }
+ (AttrKind::Normal(_), AttrKind::DocComment(..)) => SpanlessEq::eq(other, self),
+ }
+ }
+}
diff --git a/third_party/rust/syn/tests/common/mod.rs b/third_party/rust/syn/tests/common/mod.rs
new file mode 100644
index 0000000000..2156530b7c
--- /dev/null
+++ b/third_party/rust/syn/tests/common/mod.rs
@@ -0,0 +1,28 @@
+#![allow(dead_code)]
+#![allow(clippy::module_name_repetitions, clippy::shadow_unrelated)]
+
+use rayon::ThreadPoolBuilder;
+use std::env;
+
+pub mod eq;
+pub mod parse;
+
+/// Read the `ABORT_AFTER_FAILURE` environment variable, and parse it.
+pub fn abort_after() -> usize {
+ match env::var("ABORT_AFTER_FAILURE") {
+ Ok(s) => s.parse().expect("failed to parse ABORT_AFTER_FAILURE"),
+ Err(_) => usize::max_value(),
+ }
+}
+
+/// Configure Rayon threadpool.
+pub fn rayon_init() {
+ let stack_size = match env::var("RUST_MIN_STACK") {
+ Ok(s) => s.parse().expect("failed to parse RUST_MIN_STACK"),
+ Err(_) => 20 * 1024 * 1024,
+ };
+ ThreadPoolBuilder::new()
+ .stack_size(stack_size)
+ .build_global()
+ .unwrap();
+}
diff --git a/third_party/rust/syn/tests/common/parse.rs b/third_party/rust/syn/tests/common/parse.rs
new file mode 100644
index 0000000000..636d0a37a0
--- /dev/null
+++ b/third_party/rust/syn/tests/common/parse.rs
@@ -0,0 +1,48 @@
+extern crate rustc_ast;
+extern crate rustc_expand;
+extern crate rustc_parse as parse;
+extern crate rustc_session;
+extern crate rustc_span;
+
+use rustc_ast::ast;
+use rustc_ast::ptr::P;
+use rustc_session::parse::ParseSess;
+use rustc_span::source_map::FilePathMapping;
+use rustc_span::FileName;
+use std::panic;
+
+pub fn librustc_expr(input: &str) -> Option<P<ast::Expr>> {
+ match panic::catch_unwind(|| {
+ let sess = ParseSess::new(FilePathMapping::empty());
+ let e = parse::new_parser_from_source_str(
+ &sess,
+ FileName::Custom("test_precedence".to_string()),
+ input.to_string(),
+ )
+ .parse_expr();
+ match e {
+ Ok(expr) => Some(expr),
+ Err(mut diagnostic) => {
+ diagnostic.emit();
+ None
+ }
+ }
+ }) {
+ Ok(Some(e)) => Some(e),
+ Ok(None) => None,
+ Err(_) => {
+ errorf!("librustc panicked\n");
+ None
+ }
+ }
+}
+
+pub fn syn_expr(input: &str) -> Option<syn::Expr> {
+ match syn::parse_str(input) {
+ Ok(e) => Some(e),
+ Err(msg) => {
+ errorf!("syn failed to parse\n{:?}\n", msg);
+ None
+ }
+ }
+}
diff --git a/third_party/rust/syn/tests/debug/gen.rs b/third_party/rust/syn/tests/debug/gen.rs
new file mode 100644
index 0000000000..cfd63d117b
--- /dev/null
+++ b/third_party/rust/syn/tests/debug/gen.rs
@@ -0,0 +1,5640 @@
+// This file is @generated by syn-internal-codegen.
+// It is not intended for manual editing.
+
+use super::{Lite, RefCast};
+use std::fmt::{self, Debug, Display};
+impl Debug for Lite<syn::Abi> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Abi");
+ if let Some(val) = &_val.name {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::LitStr);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("name", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::AngleBracketedGenericArguments> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("AngleBracketedGenericArguments");
+ if let Some(val) = &_val.colon2_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon2);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon2_token", Print::ref_cast(val));
+ }
+ if !_val.args.is_empty() {
+ formatter.field("args", Lite(&_val.args));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Arm> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Arm");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ if let Some(val) = &_val.guard {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::If, Box<syn::Expr>));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("guard", Print::ref_cast(val));
+ }
+ formatter.field("body", Lite(&_val.body));
+ if let Some(val) = &_val.comma {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Comma);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("comma", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::AttrStyle> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::AttrStyle::Outer => formatter.write_str("Outer"),
+ syn::AttrStyle::Inner(_val) => {
+ formatter.write_str("Inner")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::Attribute> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Attribute");
+ formatter.field("style", Lite(&_val.style));
+ formatter.field("path", Lite(&_val.path));
+ formatter.field("tokens", Lite(&_val.tokens));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::BareFnArg> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("BareFnArg");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.name {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((proc_macro2::Ident, syn::token::Colon));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.0), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("name", Print::ref_cast(val));
+ }
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::BinOp> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::BinOp::Add(_val) => {
+ formatter.write_str("Add")?;
+ Ok(())
+ }
+ syn::BinOp::Sub(_val) => {
+ formatter.write_str("Sub")?;
+ Ok(())
+ }
+ syn::BinOp::Mul(_val) => {
+ formatter.write_str("Mul")?;
+ Ok(())
+ }
+ syn::BinOp::Div(_val) => {
+ formatter.write_str("Div")?;
+ Ok(())
+ }
+ syn::BinOp::Rem(_val) => {
+ formatter.write_str("Rem")?;
+ Ok(())
+ }
+ syn::BinOp::And(_val) => {
+ formatter.write_str("And")?;
+ Ok(())
+ }
+ syn::BinOp::Or(_val) => {
+ formatter.write_str("Or")?;
+ Ok(())
+ }
+ syn::BinOp::BitXor(_val) => {
+ formatter.write_str("BitXor")?;
+ Ok(())
+ }
+ syn::BinOp::BitAnd(_val) => {
+ formatter.write_str("BitAnd")?;
+ Ok(())
+ }
+ syn::BinOp::BitOr(_val) => {
+ formatter.write_str("BitOr")?;
+ Ok(())
+ }
+ syn::BinOp::Shl(_val) => {
+ formatter.write_str("Shl")?;
+ Ok(())
+ }
+ syn::BinOp::Shr(_val) => {
+ formatter.write_str("Shr")?;
+ Ok(())
+ }
+ syn::BinOp::Eq(_val) => {
+ formatter.write_str("Eq")?;
+ Ok(())
+ }
+ syn::BinOp::Lt(_val) => {
+ formatter.write_str("Lt")?;
+ Ok(())
+ }
+ syn::BinOp::Le(_val) => {
+ formatter.write_str("Le")?;
+ Ok(())
+ }
+ syn::BinOp::Ne(_val) => {
+ formatter.write_str("Ne")?;
+ Ok(())
+ }
+ syn::BinOp::Ge(_val) => {
+ formatter.write_str("Ge")?;
+ Ok(())
+ }
+ syn::BinOp::Gt(_val) => {
+ formatter.write_str("Gt")?;
+ Ok(())
+ }
+ syn::BinOp::AddEq(_val) => {
+ formatter.write_str("AddEq")?;
+ Ok(())
+ }
+ syn::BinOp::SubEq(_val) => {
+ formatter.write_str("SubEq")?;
+ Ok(())
+ }
+ syn::BinOp::MulEq(_val) => {
+ formatter.write_str("MulEq")?;
+ Ok(())
+ }
+ syn::BinOp::DivEq(_val) => {
+ formatter.write_str("DivEq")?;
+ Ok(())
+ }
+ syn::BinOp::RemEq(_val) => {
+ formatter.write_str("RemEq")?;
+ Ok(())
+ }
+ syn::BinOp::BitXorEq(_val) => {
+ formatter.write_str("BitXorEq")?;
+ Ok(())
+ }
+ syn::BinOp::BitAndEq(_val) => {
+ formatter.write_str("BitAndEq")?;
+ Ok(())
+ }
+ syn::BinOp::BitOrEq(_val) => {
+ formatter.write_str("BitOrEq")?;
+ Ok(())
+ }
+ syn::BinOp::ShlEq(_val) => {
+ formatter.write_str("ShlEq")?;
+ Ok(())
+ }
+ syn::BinOp::ShrEq(_val) => {
+ formatter.write_str("ShrEq")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::Binding> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Binding");
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Block> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Block");
+ if !_val.stmts.is_empty() {
+ formatter.field("stmts", Lite(&_val.stmts));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::BoundLifetimes> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("BoundLifetimes");
+ if !_val.lifetimes.is_empty() {
+ formatter.field("lifetimes", Lite(&_val.lifetimes));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ConstParam> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ConstParam");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ if let Some(val) = &_val.eq_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Eq);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("eq_token", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.default {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Expr);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("default", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Constraint> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Constraint");
+ formatter.field("ident", Lite(&_val.ident));
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Data> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Data::Struct(_val) => {
+ let mut formatter = formatter.debug_struct("Data::Struct");
+ formatter.field("fields", Lite(&_val.fields));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Data::Enum(_val) => {
+ let mut formatter = formatter.debug_struct("Data::Enum");
+ if !_val.variants.is_empty() {
+ formatter.field("variants", Lite(&_val.variants));
+ }
+ formatter.finish()
+ }
+ syn::Data::Union(_val) => {
+ let mut formatter = formatter.debug_struct("Data::Union");
+ formatter.field("fields", Lite(&_val.fields));
+ formatter.finish()
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::DataEnum> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("DataEnum");
+ if !_val.variants.is_empty() {
+ formatter.field("variants", Lite(&_val.variants));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::DataStruct> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("DataStruct");
+ formatter.field("fields", Lite(&_val.fields));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::DataUnion> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("DataUnion");
+ formatter.field("fields", Lite(&_val.fields));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::DeriveInput> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("DeriveInput");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ formatter.field("data", Lite(&_val.data));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Expr> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Expr::Array(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Array");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if !_val.elems.is_empty() {
+ formatter.field("elems", Lite(&_val.elems));
+ }
+ formatter.finish()
+ }
+ syn::Expr::Assign(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Assign");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("left", Lite(&_val.left));
+ formatter.field("right", Lite(&_val.right));
+ formatter.finish()
+ }
+ syn::Expr::AssignOp(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::AssignOp");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("left", Lite(&_val.left));
+ formatter.field("op", Lite(&_val.op));
+ formatter.field("right", Lite(&_val.right));
+ formatter.finish()
+ }
+ syn::Expr::Async(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Async");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.capture {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Move);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("capture", Print::ref_cast(val));
+ }
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+ syn::Expr::Await(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Await");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("base", Lite(&_val.base));
+ formatter.finish()
+ }
+ syn::Expr::Binary(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Binary");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("left", Lite(&_val.left));
+ formatter.field("op", Lite(&_val.op));
+ formatter.field("right", Lite(&_val.right));
+ formatter.finish()
+ }
+ syn::Expr::Block(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Block");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Label);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+ syn::Expr::Box(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Box");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::Expr::Break(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Break");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Lifetime);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.expr {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("expr", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Expr::Call(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Call");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("func", Lite(&_val.func));
+ if !_val.args.is_empty() {
+ formatter.field("args", Lite(&_val.args));
+ }
+ formatter.finish()
+ }
+ syn::Expr::Cast(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Cast");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+ syn::Expr::Closure(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Closure");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.movability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Static);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("movability", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.asyncness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Async);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("asyncness", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.capture {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Move);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("capture", Print::ref_cast(val));
+ }
+ if !_val.inputs.is_empty() {
+ formatter.field("inputs", Lite(&_val.inputs));
+ }
+ formatter.field("output", Lite(&_val.output));
+ formatter.field("body", Lite(&_val.body));
+ formatter.finish()
+ }
+ syn::Expr::Continue(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Continue");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Lifetime);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Expr::Field(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Field");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("base", Lite(&_val.base));
+ formatter.field("member", Lite(&_val.member));
+ formatter.finish()
+ }
+ syn::Expr::ForLoop(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::ForLoop");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Label);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.field("body", Lite(&_val.body));
+ formatter.finish()
+ }
+ syn::Expr::Group(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Group");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::Expr::If(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::If");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("cond", Lite(&_val.cond));
+ formatter.field("then_branch", Lite(&_val.then_branch));
+ if let Some(val) = &_val.else_branch {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::Else, Box<syn::Expr>));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("else_branch", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Expr::Index(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Index");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.field("index", Lite(&_val.index));
+ formatter.finish()
+ }
+ syn::Expr::Let(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Let");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::Expr::Lit(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Lit");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("lit", Lite(&_val.lit));
+ formatter.finish()
+ }
+ syn::Expr::Loop(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Loop");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Label);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ formatter.field("body", Lite(&_val.body));
+ formatter.finish()
+ }
+ syn::Expr::Macro(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Macro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ formatter.finish()
+ }
+ syn::Expr::Match(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Match");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ if !_val.arms.is_empty() {
+ formatter.field("arms", Lite(&_val.arms));
+ }
+ formatter.finish()
+ }
+ syn::Expr::MethodCall(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::MethodCall");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("receiver", Lite(&_val.receiver));
+ formatter.field("method", Lite(&_val.method));
+ if let Some(val) = &_val.turbofish {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::MethodTurbofish);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("turbofish", Print::ref_cast(val));
+ }
+ if !_val.args.is_empty() {
+ formatter.field("args", Lite(&_val.args));
+ }
+ formatter.finish()
+ }
+ syn::Expr::Paren(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Paren");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::Expr::Path(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Path");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.qself {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::QSelf);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("qself", Print::ref_cast(val));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.finish()
+ }
+ syn::Expr::Range(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Range");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.from {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("from", Print::ref_cast(val));
+ }
+ formatter.field("limits", Lite(&_val.limits));
+ if let Some(val) = &_val.to {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("to", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Expr::Reference(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Reference");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::Expr::Repeat(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Repeat");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.field("len", Lite(&_val.len));
+ formatter.finish()
+ }
+ syn::Expr::Return(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Return");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.expr {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("expr", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Expr::Struct(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Struct");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("path", Lite(&_val.path));
+ if !_val.fields.is_empty() {
+ formatter.field("fields", Lite(&_val.fields));
+ }
+ if let Some(val) = &_val.dot2_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Dot2);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("dot2_token", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.rest {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("rest", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Expr::Try(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Try");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::Expr::TryBlock(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::TryBlock");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+ syn::Expr::Tuple(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Tuple");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if !_val.elems.is_empty() {
+ formatter.field("elems", Lite(&_val.elems));
+ }
+ formatter.finish()
+ }
+ syn::Expr::Type(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Type");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+ syn::Expr::Unary(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Unary");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("op", Lite(&_val.op));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::Expr::Unsafe(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Unsafe");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+ syn::Expr::Verbatim(_val) => {
+ formatter.write_str("Verbatim")?;
+ formatter.write_str("(`")?;
+ Display::fmt(_val, formatter)?;
+ formatter.write_str("`)")?;
+ Ok(())
+ }
+ syn::Expr::While(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::While");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Label);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ formatter.field("cond", Lite(&_val.cond));
+ formatter.field("body", Lite(&_val.body));
+ formatter.finish()
+ }
+ syn::Expr::Yield(_val) => {
+ let mut formatter = formatter.debug_struct("Expr::Yield");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.expr {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("expr", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ _ => unreachable!(),
+ }
+ }
+}
+impl Debug for Lite<syn::ExprArray> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprArray");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if !_val.elems.is_empty() {
+ formatter.field("elems", Lite(&_val.elems));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprAssign> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprAssign");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("left", Lite(&_val.left));
+ formatter.field("right", Lite(&_val.right));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprAssignOp> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprAssignOp");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("left", Lite(&_val.left));
+ formatter.field("op", Lite(&_val.op));
+ formatter.field("right", Lite(&_val.right));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprAsync> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprAsync");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.capture {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Move);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("capture", Print::ref_cast(val));
+ }
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprAwait> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprAwait");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("base", Lite(&_val.base));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprBinary> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprBinary");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("left", Lite(&_val.left));
+ formatter.field("op", Lite(&_val.op));
+ formatter.field("right", Lite(&_val.right));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprBlock> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprBlock");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Label);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprBox> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprBox");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprBreak> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprBreak");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Lifetime);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.expr {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("expr", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprCall> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprCall");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("func", Lite(&_val.func));
+ if !_val.args.is_empty() {
+ formatter.field("args", Lite(&_val.args));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprCast> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprCast");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprClosure> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprClosure");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.movability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Static);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("movability", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.asyncness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Async);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("asyncness", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.capture {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Move);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("capture", Print::ref_cast(val));
+ }
+ if !_val.inputs.is_empty() {
+ formatter.field("inputs", Lite(&_val.inputs));
+ }
+ formatter.field("output", Lite(&_val.output));
+ formatter.field("body", Lite(&_val.body));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprContinue> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprContinue");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Lifetime);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprField> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprField");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("base", Lite(&_val.base));
+ formatter.field("member", Lite(&_val.member));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprForLoop> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprForLoop");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Label);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.field("body", Lite(&_val.body));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprGroup> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprGroup");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprIf> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprIf");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("cond", Lite(&_val.cond));
+ formatter.field("then_branch", Lite(&_val.then_branch));
+ if let Some(val) = &_val.else_branch {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::Else, Box<syn::Expr>));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("else_branch", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprIndex> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprIndex");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.field("index", Lite(&_val.index));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprLet> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprLet");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprLit> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprLit");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("lit", Lite(&_val.lit));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprLoop> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprLoop");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Label);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ formatter.field("body", Lite(&_val.body));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprMacro> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprMacro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprMatch> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprMatch");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ if !_val.arms.is_empty() {
+ formatter.field("arms", Lite(&_val.arms));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprMethodCall> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprMethodCall");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("receiver", Lite(&_val.receiver));
+ formatter.field("method", Lite(&_val.method));
+ if let Some(val) = &_val.turbofish {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::MethodTurbofish);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("turbofish", Print::ref_cast(val));
+ }
+ if !_val.args.is_empty() {
+ formatter.field("args", Lite(&_val.args));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprParen> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprParen");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprPath> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprPath");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.qself {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::QSelf);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("qself", Print::ref_cast(val));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprRange> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprRange");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.from {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("from", Print::ref_cast(val));
+ }
+ formatter.field("limits", Lite(&_val.limits));
+ if let Some(val) = &_val.to {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("to", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprReference> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprReference");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprRepeat> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprRepeat");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.field("len", Lite(&_val.len));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprReturn> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprReturn");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.expr {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("expr", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprStruct> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprStruct");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("path", Lite(&_val.path));
+ if !_val.fields.is_empty() {
+ formatter.field("fields", Lite(&_val.fields));
+ }
+ if let Some(val) = &_val.dot2_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Dot2);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("dot2_token", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.rest {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("rest", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprTry> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprTry");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprTryBlock> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprTryBlock");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprTuple> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprTuple");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if !_val.elems.is_empty() {
+ formatter.field("elems", Lite(&_val.elems));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprType> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprType");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprUnary> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprUnary");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("op", Lite(&_val.op));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprUnsafe> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprUnsafe");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprWhile> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprWhile");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.label {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Label);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("label", Print::ref_cast(val));
+ }
+ formatter.field("cond", Lite(&_val.cond));
+ formatter.field("body", Lite(&_val.body));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ExprYield> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ExprYield");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.expr {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Box<syn::Expr>);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("expr", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Field> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Field");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.ident {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(proc_macro2::Ident);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("ident", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.colon_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon_token", Print::ref_cast(val));
+ }
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::FieldPat> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("FieldPat");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("member", Lite(&_val.member));
+ if let Some(val) = &_val.colon_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon_token", Print::ref_cast(val));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::FieldValue> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("FieldValue");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("member", Lite(&_val.member));
+ if let Some(val) = &_val.colon_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon_token", Print::ref_cast(val));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Fields> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Fields::Named(_val) => {
+ let mut formatter = formatter.debug_struct("Fields::Named");
+ if !_val.named.is_empty() {
+ formatter.field("named", Lite(&_val.named));
+ }
+ formatter.finish()
+ }
+ syn::Fields::Unnamed(_val) => {
+ let mut formatter = formatter.debug_struct("Fields::Unnamed");
+ if !_val.unnamed.is_empty() {
+ formatter.field("unnamed", Lite(&_val.unnamed));
+ }
+ formatter.finish()
+ }
+ syn::Fields::Unit => formatter.write_str("Unit"),
+ }
+ }
+}
+impl Debug for Lite<syn::FieldsNamed> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("FieldsNamed");
+ if !_val.named.is_empty() {
+ formatter.field("named", Lite(&_val.named));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::FieldsUnnamed> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("FieldsUnnamed");
+ if !_val.unnamed.is_empty() {
+ formatter.field("unnamed", Lite(&_val.unnamed));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::File> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("File");
+ if let Some(val) = &_val.shebang {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(String);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("shebang", Print::ref_cast(val));
+ }
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if !_val.items.is_empty() {
+ formatter.field("items", Lite(&_val.items));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::FnArg> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::FnArg::Receiver(_val) => {
+ formatter.write_str("Receiver")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::FnArg::Typed(_val) => {
+ formatter.write_str("Typed")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::ForeignItem> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::ForeignItem::Fn(_val) => {
+ let mut formatter = formatter.debug_struct("ForeignItem::Fn");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("sig", Lite(&_val.sig));
+ formatter.finish()
+ }
+ syn::ForeignItem::Static(_val) => {
+ let mut formatter = formatter.debug_struct("ForeignItem::Static");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+ syn::ForeignItem::Type(_val) => {
+ let mut formatter = formatter.debug_struct("ForeignItem::Type");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.finish()
+ }
+ syn::ForeignItem::Macro(_val) => {
+ let mut formatter = formatter.debug_struct("ForeignItem::Macro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::ForeignItem::Verbatim(_val) => {
+ formatter.write_str("Verbatim")?;
+ formatter.write_str("(`")?;
+ Display::fmt(_val, formatter)?;
+ formatter.write_str("`)")?;
+ Ok(())
+ }
+ _ => unreachable!(),
+ }
+ }
+}
+impl Debug for Lite<syn::ForeignItemFn> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ForeignItemFn");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("sig", Lite(&_val.sig));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ForeignItemMacro> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ForeignItemMacro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ForeignItemStatic> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ForeignItemStatic");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ForeignItemType> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ForeignItemType");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::GenericArgument> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::GenericArgument::Lifetime(_val) => {
+ formatter.write_str("Lifetime")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::GenericArgument::Type(_val) => {
+ formatter.write_str("Type")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::GenericArgument::Const(_val) => {
+ formatter.write_str("Const")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::GenericArgument::Binding(_val) => {
+ formatter.write_str("Binding")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::GenericArgument::Constraint(_val) => {
+ formatter.write_str("Constraint")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::GenericMethodArgument> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::GenericMethodArgument::Type(_val) => {
+ formatter.write_str("Type")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::GenericMethodArgument::Const(_val) => {
+ formatter.write_str("Const")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::GenericParam> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::GenericParam::Type(_val) => {
+ formatter.write_str("Type")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::GenericParam::Lifetime(_val) => {
+ formatter.write_str("Lifetime")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::GenericParam::Const(_val) => {
+ formatter.write_str("Const")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::Generics> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Generics");
+ if let Some(val) = &_val.lt_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Lt);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("lt_token", Print::ref_cast(val));
+ }
+ if !_val.params.is_empty() {
+ formatter.field("params", Lite(&_val.params));
+ }
+ if let Some(val) = &_val.gt_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Gt);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("gt_token", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.where_clause {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::WhereClause);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("where_clause", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ImplItem> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::ImplItem::Const(_val) => {
+ let mut formatter = formatter.debug_struct("ImplItem::Const");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.defaultness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Default);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("defaultness", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::ImplItem::Method(_val) => {
+ let mut formatter = formatter.debug_struct("ImplItem::Method");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.defaultness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Default);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("defaultness", Print::ref_cast(val));
+ }
+ formatter.field("sig", Lite(&_val.sig));
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+ syn::ImplItem::Type(_val) => {
+ let mut formatter = formatter.debug_struct("ImplItem::Type");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.defaultness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Default);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("defaultness", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+ syn::ImplItem::Macro(_val) => {
+ let mut formatter = formatter.debug_struct("ImplItem::Macro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::ImplItem::Verbatim(_val) => {
+ formatter.write_str("Verbatim")?;
+ formatter.write_str("(`")?;
+ Display::fmt(_val, formatter)?;
+ formatter.write_str("`)")?;
+ Ok(())
+ }
+ _ => unreachable!(),
+ }
+ }
+}
+impl Debug for Lite<syn::ImplItemConst> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ImplItemConst");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.defaultness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Default);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("defaultness", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ImplItemMacro> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ImplItemMacro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ImplItemMethod> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ImplItemMethod");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.defaultness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Default);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("defaultness", Print::ref_cast(val));
+ }
+ formatter.field("sig", Lite(&_val.sig));
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ImplItemType> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ImplItemType");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.defaultness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Default);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("defaultness", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Index> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Index");
+ formatter.field("index", Lite(&_val.index));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Item> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Item::Const(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Const");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::Item::Enum(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Enum");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ if !_val.variants.is_empty() {
+ formatter.field("variants", Lite(&_val.variants));
+ }
+ formatter.finish()
+ }
+ syn::Item::ExternCrate(_val) => {
+ let mut formatter = formatter.debug_struct("Item::ExternCrate");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ if let Some(val) = &_val.rename {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::As, proc_macro2::Ident));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("rename", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Item::Fn(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Fn");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("sig", Lite(&_val.sig));
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+ syn::Item::ForeignMod(_val) => {
+ let mut formatter = formatter.debug_struct("Item::ForeignMod");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("abi", Lite(&_val.abi));
+ if !_val.items.is_empty() {
+ formatter.field("items", Lite(&_val.items));
+ }
+ formatter.finish()
+ }
+ syn::Item::Impl(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Impl");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.defaultness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Default);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("defaultness", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.unsafety {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Unsafe);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("unsafety", Print::ref_cast(val));
+ }
+ formatter.field("generics", Lite(&_val.generics));
+ if let Some(val) = &_val.trait_ {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((Option<syn::token::Bang>, syn::Path, syn::token::For));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(
+ &(
+ {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Option<syn::token::Bang>);
+ impl Debug for Print {
+ fn fmt(
+ &self,
+ formatter: &mut fmt::Formatter,
+ ) -> fmt::Result {
+ match &self.0 {
+ Some(_val) => {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ None => formatter.write_str("None"),
+ }
+ }
+ }
+ Print::ref_cast(&_val.0)
+ },
+ Lite(&_val.1),
+ ),
+ formatter,
+ )?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("trait_", Print::ref_cast(val));
+ }
+ formatter.field("self_ty", Lite(&_val.self_ty));
+ if !_val.items.is_empty() {
+ formatter.field("items", Lite(&_val.items));
+ }
+ formatter.finish()
+ }
+ syn::Item::Macro(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Macro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.ident {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(proc_macro2::Ident);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("ident", Print::ref_cast(val));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Item::Macro2(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Macro2");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("rules", Lite(&_val.rules));
+ formatter.finish()
+ }
+ syn::Item::Mod(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Mod");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ if let Some(val) = &_val.content {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::Brace, Vec<syn::Item>));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("content", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.semi {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Item::Static(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Static");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::Item::Struct(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Struct");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ formatter.field("fields", Lite(&_val.fields));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Item::Trait(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Trait");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.unsafety {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Unsafe);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("unsafety", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.auto_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Auto);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("auto_token", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ if let Some(val) = &_val.colon_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon_token", Print::ref_cast(val));
+ }
+ if !_val.supertraits.is_empty() {
+ formatter.field("supertraits", Lite(&_val.supertraits));
+ }
+ if !_val.items.is_empty() {
+ formatter.field("items", Lite(&_val.items));
+ }
+ formatter.finish()
+ }
+ syn::Item::TraitAlias(_val) => {
+ let mut formatter = formatter.debug_struct("Item::TraitAlias");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ formatter.finish()
+ }
+ syn::Item::Type(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Type");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+ syn::Item::Union(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Union");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ formatter.field("fields", Lite(&_val.fields));
+ formatter.finish()
+ }
+ syn::Item::Use(_val) => {
+ let mut formatter = formatter.debug_struct("Item::Use");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.leading_colon {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon2);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("leading_colon", Print::ref_cast(val));
+ }
+ formatter.field("tree", Lite(&_val.tree));
+ formatter.finish()
+ }
+ syn::Item::Verbatim(_val) => {
+ formatter.write_str("Verbatim")?;
+ formatter.write_str("(`")?;
+ Display::fmt(_val, formatter)?;
+ formatter.write_str("`)")?;
+ Ok(())
+ }
+ _ => unreachable!(),
+ }
+ }
+}
+impl Debug for Lite<syn::ItemConst> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemConst");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemEnum> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemEnum");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ if !_val.variants.is_empty() {
+ formatter.field("variants", Lite(&_val.variants));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemExternCrate> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemExternCrate");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ if let Some(val) = &_val.rename {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::As, proc_macro2::Ident));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("rename", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemFn> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemFn");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("sig", Lite(&_val.sig));
+ formatter.field("block", Lite(&_val.block));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemForeignMod> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemForeignMod");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("abi", Lite(&_val.abi));
+ if !_val.items.is_empty() {
+ formatter.field("items", Lite(&_val.items));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemImpl> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemImpl");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.defaultness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Default);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("defaultness", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.unsafety {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Unsafe);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("unsafety", Print::ref_cast(val));
+ }
+ formatter.field("generics", Lite(&_val.generics));
+ if let Some(val) = &_val.trait_ {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((Option<syn::token::Bang>, syn::Path, syn::token::For));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(
+ &(
+ {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Option<syn::token::Bang>);
+ impl Debug for Print {
+ fn fmt(
+ &self,
+ formatter: &mut fmt::Formatter,
+ ) -> fmt::Result {
+ match &self.0 {
+ Some(_val) => {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ None => formatter.write_str("None"),
+ }
+ }
+ }
+ Print::ref_cast(&_val.0)
+ },
+ Lite(&_val.1),
+ ),
+ formatter,
+ )?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("trait_", Print::ref_cast(val));
+ }
+ formatter.field("self_ty", Lite(&_val.self_ty));
+ if !_val.items.is_empty() {
+ formatter.field("items", Lite(&_val.items));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemMacro> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemMacro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.ident {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(proc_macro2::Ident);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("ident", Print::ref_cast(val));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemMacro2> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemMacro2");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("rules", Lite(&_val.rules));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemMod> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemMod");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ if let Some(val) = &_val.content {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::Brace, Vec<syn::Item>));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("content", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.semi {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemStatic> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemStatic");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemStruct> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemStruct");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ formatter.field("fields", Lite(&_val.fields));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemTrait> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemTrait");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.unsafety {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Unsafe);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("unsafety", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.auto_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Auto);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("auto_token", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ if let Some(val) = &_val.colon_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon_token", Print::ref_cast(val));
+ }
+ if !_val.supertraits.is_empty() {
+ formatter.field("supertraits", Lite(&_val.supertraits));
+ }
+ if !_val.items.is_empty() {
+ formatter.field("items", Lite(&_val.items));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemTraitAlias> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemTraitAlias");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemType> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemType");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemUnion> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemUnion");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ formatter.field("fields", Lite(&_val.fields));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ItemUse> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ItemUse");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("vis", Lite(&_val.vis));
+ if let Some(val) = &_val.leading_colon {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon2);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("leading_colon", Print::ref_cast(val));
+ }
+ formatter.field("tree", Lite(&_val.tree));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Label> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Label");
+ formatter.field("name", Lite(&_val.name));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Lifetime> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Lifetime");
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::LifetimeDef> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("LifetimeDef");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("lifetime", Lite(&_val.lifetime));
+ if let Some(val) = &_val.colon_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon_token", Print::ref_cast(val));
+ }
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Lit> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Lit::Str(_val) => write!(formatter, "{:?}", _val.value()),
+ syn::Lit::ByteStr(_val) => write!(formatter, "{:?}", _val.value()),
+ syn::Lit::Byte(_val) => write!(formatter, "{:?}", _val.value()),
+ syn::Lit::Char(_val) => write!(formatter, "{:?}", _val.value()),
+ syn::Lit::Int(_val) => write!(formatter, "{}", _val),
+ syn::Lit::Float(_val) => write!(formatter, "{}", _val),
+ syn::Lit::Bool(_val) => {
+ let mut formatter = formatter.debug_struct("Lit::Bool");
+ formatter.field("value", Lite(&_val.value));
+ formatter.finish()
+ }
+ syn::Lit::Verbatim(_val) => {
+ formatter.write_str("Verbatim")?;
+ formatter.write_str("(`")?;
+ Display::fmt(_val, formatter)?;
+ formatter.write_str("`)")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::LitBool> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("LitBool");
+ formatter.field("value", Lite(&_val.value));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::LitByte> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ write!(formatter, "{:?}", _val.value())
+ }
+}
+impl Debug for Lite<syn::LitByteStr> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ write!(formatter, "{:?}", _val.value())
+ }
+}
+impl Debug for Lite<syn::LitChar> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ write!(formatter, "{:?}", _val.value())
+ }
+}
+impl Debug for Lite<syn::LitFloat> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ write!(formatter, "{}", _val)
+ }
+}
+impl Debug for Lite<syn::LitInt> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ write!(formatter, "{}", _val)
+ }
+}
+impl Debug for Lite<syn::LitStr> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ write!(formatter, "{:?}", _val.value())
+ }
+}
+impl Debug for Lite<syn::Local> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Local");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ if let Some(val) = &_val.init {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::Eq, Box<syn::Expr>));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("init", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Macro> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Macro");
+ formatter.field("path", Lite(&_val.path));
+ formatter.field("delimiter", Lite(&_val.delimiter));
+ formatter.field("tokens", Lite(&_val.tokens));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::MacroDelimiter> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::MacroDelimiter::Paren(_val) => {
+ formatter.write_str("Paren")?;
+ Ok(())
+ }
+ syn::MacroDelimiter::Brace(_val) => {
+ formatter.write_str("Brace")?;
+ Ok(())
+ }
+ syn::MacroDelimiter::Bracket(_val) => {
+ formatter.write_str("Bracket")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::Member> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Member::Named(_val) => {
+ formatter.write_str("Named")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::Member::Unnamed(_val) => {
+ formatter.write_str("Unnamed")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::Meta> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Meta::Path(_val) => {
+ formatter.write_str("Path")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::Meta::List(_val) => {
+ let mut formatter = formatter.debug_struct("Meta::List");
+ formatter.field("path", Lite(&_val.path));
+ if !_val.nested.is_empty() {
+ formatter.field("nested", Lite(&_val.nested));
+ }
+ formatter.finish()
+ }
+ syn::Meta::NameValue(_val) => {
+ let mut formatter = formatter.debug_struct("Meta::NameValue");
+ formatter.field("path", Lite(&_val.path));
+ formatter.field("lit", Lite(&_val.lit));
+ formatter.finish()
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::MetaList> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("MetaList");
+ formatter.field("path", Lite(&_val.path));
+ if !_val.nested.is_empty() {
+ formatter.field("nested", Lite(&_val.nested));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::MetaNameValue> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("MetaNameValue");
+ formatter.field("path", Lite(&_val.path));
+ formatter.field("lit", Lite(&_val.lit));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::MethodTurbofish> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("MethodTurbofish");
+ if !_val.args.is_empty() {
+ formatter.field("args", Lite(&_val.args));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::NestedMeta> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::NestedMeta::Meta(_val) => {
+ formatter.write_str("Meta")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::NestedMeta::Lit(_val) => {
+ formatter.write_str("Lit")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::ParenthesizedGenericArguments> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("ParenthesizedGenericArguments");
+ if !_val.inputs.is_empty() {
+ formatter.field("inputs", Lite(&_val.inputs));
+ }
+ formatter.field("output", Lite(&_val.output));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Pat> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Pat::Box(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Box");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.finish()
+ }
+ syn::Pat::Ident(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Ident");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.by_ref {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Ref);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("by_ref", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ if let Some(val) = &_val.subpat {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::At, Box<syn::Pat>));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("subpat", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Pat::Lit(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Lit");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+ syn::Pat::Macro(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Macro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ formatter.finish()
+ }
+ syn::Pat::Or(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Or");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.leading_vert {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Or);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("leading_vert", Print::ref_cast(val));
+ }
+ if !_val.cases.is_empty() {
+ formatter.field("cases", Lite(&_val.cases));
+ }
+ formatter.finish()
+ }
+ syn::Pat::Path(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Path");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.qself {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::QSelf);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("qself", Print::ref_cast(val));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.finish()
+ }
+ syn::Pat::Range(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Range");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("lo", Lite(&_val.lo));
+ formatter.field("limits", Lite(&_val.limits));
+ formatter.field("hi", Lite(&_val.hi));
+ formatter.finish()
+ }
+ syn::Pat::Reference(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Reference");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.finish()
+ }
+ syn::Pat::Rest(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Rest");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.finish()
+ }
+ syn::Pat::Slice(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Slice");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if !_val.elems.is_empty() {
+ formatter.field("elems", Lite(&_val.elems));
+ }
+ formatter.finish()
+ }
+ syn::Pat::Struct(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Struct");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("path", Lite(&_val.path));
+ if !_val.fields.is_empty() {
+ formatter.field("fields", Lite(&_val.fields));
+ }
+ if let Some(val) = &_val.dot2_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Dot2);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("dot2_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::Pat::Tuple(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Tuple");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if !_val.elems.is_empty() {
+ formatter.field("elems", Lite(&_val.elems));
+ }
+ formatter.finish()
+ }
+ syn::Pat::TupleStruct(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::TupleStruct");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.finish()
+ }
+ syn::Pat::Type(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Type");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+ syn::Pat::Verbatim(_val) => {
+ formatter.write_str("Verbatim")?;
+ formatter.write_str("(`")?;
+ Display::fmt(_val, formatter)?;
+ formatter.write_str("`)")?;
+ Ok(())
+ }
+ syn::Pat::Wild(_val) => {
+ let mut formatter = formatter.debug_struct("Pat::Wild");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.finish()
+ }
+ _ => unreachable!(),
+ }
+ }
+}
+impl Debug for Lite<syn::PatBox> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatBox");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatIdent> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatIdent");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.by_ref {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Ref);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("by_ref", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ if let Some(val) = &_val.subpat {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::At, Box<syn::Pat>));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("subpat", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatLit> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatLit");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("expr", Lite(&_val.expr));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatMacro> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatMacro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatOr> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatOr");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.leading_vert {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Or);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("leading_vert", Print::ref_cast(val));
+ }
+ if !_val.cases.is_empty() {
+ formatter.field("cases", Lite(&_val.cases));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatPath> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatPath");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.qself {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::QSelf);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("qself", Print::ref_cast(val));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatRange> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatRange");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("lo", Lite(&_val.lo));
+ formatter.field("limits", Lite(&_val.limits));
+ formatter.field("hi", Lite(&_val.hi));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatReference> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatReference");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatRest> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatRest");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatSlice> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatSlice");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if !_val.elems.is_empty() {
+ formatter.field("elems", Lite(&_val.elems));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatStruct> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatStruct");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("path", Lite(&_val.path));
+ if !_val.fields.is_empty() {
+ formatter.field("fields", Lite(&_val.fields));
+ }
+ if let Some(val) = &_val.dot2_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Dot2);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("dot2_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatTuple> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatTuple");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if !_val.elems.is_empty() {
+ formatter.field("elems", Lite(&_val.elems));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatTupleStruct> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatTupleStruct");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatType> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatType");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("pat", Lite(&_val.pat));
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PatWild> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PatWild");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Path> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Path");
+ if let Some(val) = &_val.leading_colon {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon2);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("leading_colon", Print::ref_cast(val));
+ }
+ if !_val.segments.is_empty() {
+ formatter.field("segments", Lite(&_val.segments));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PathArguments> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::PathArguments::None => formatter.write_str("None"),
+ syn::PathArguments::AngleBracketed(_val) => {
+ let mut formatter = formatter
+ .debug_struct("PathArguments::AngleBracketed");
+ if let Some(val) = &_val.colon2_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon2);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon2_token", Print::ref_cast(val));
+ }
+ if !_val.args.is_empty() {
+ formatter.field("args", Lite(&_val.args));
+ }
+ formatter.finish()
+ }
+ syn::PathArguments::Parenthesized(_val) => {
+ let mut formatter = formatter
+ .debug_struct("PathArguments::Parenthesized");
+ if !_val.inputs.is_empty() {
+ formatter.field("inputs", Lite(&_val.inputs));
+ }
+ formatter.field("output", Lite(&_val.output));
+ formatter.finish()
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::PathSegment> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PathSegment");
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("arguments", Lite(&_val.arguments));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PredicateEq> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PredicateEq");
+ formatter.field("lhs_ty", Lite(&_val.lhs_ty));
+ formatter.field("rhs_ty", Lite(&_val.rhs_ty));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PredicateLifetime> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PredicateLifetime");
+ formatter.field("lifetime", Lite(&_val.lifetime));
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::PredicateType> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("PredicateType");
+ if let Some(val) = &_val.lifetimes {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::BoundLifetimes);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("lifetimes", Print::ref_cast(val));
+ }
+ formatter.field("bounded_ty", Lite(&_val.bounded_ty));
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::QSelf> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("QSelf");
+ formatter.field("ty", Lite(&_val.ty));
+ formatter.field("position", Lite(&_val.position));
+ if let Some(val) = &_val.as_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::As);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("as_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::RangeLimits> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::RangeLimits::HalfOpen(_val) => {
+ formatter.write_str("HalfOpen")?;
+ Ok(())
+ }
+ syn::RangeLimits::Closed(_val) => {
+ formatter.write_str("Closed")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::Receiver> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Receiver");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ if let Some(val) = &_val.reference {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::And, Option<syn::Lifetime>));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(
+ {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(Option<syn::Lifetime>);
+ impl Debug for Print {
+ fn fmt(
+ &self,
+ formatter: &mut fmt::Formatter,
+ ) -> fmt::Result {
+ match &self.0 {
+ Some(_val) => {
+ formatter.write_str("Some")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ None => formatter.write_str("None"),
+ }
+ }
+ }
+ Print::ref_cast(&_val.1)
+ },
+ formatter,
+ )?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("reference", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::ReturnType> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::ReturnType::Default => formatter.write_str("Default"),
+ syn::ReturnType::Type(_v0, _v1) => {
+ let mut formatter = formatter.debug_tuple("Type");
+ formatter.field(Lite(_v1));
+ formatter.finish()
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::Signature> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Signature");
+ if let Some(val) = &_val.constness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Const);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("constness", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.asyncness {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Async);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("asyncness", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.unsafety {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Unsafe);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("unsafety", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.abi {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Abi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("abi", Print::ref_cast(val));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ if !_val.inputs.is_empty() {
+ formatter.field("inputs", Lite(&_val.inputs));
+ }
+ if let Some(val) = &_val.variadic {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Variadic);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("variadic", Print::ref_cast(val));
+ }
+ formatter.field("output", Lite(&_val.output));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Stmt> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Stmt::Local(_val) => {
+ formatter.write_str("Local")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::Stmt::Item(_val) => {
+ formatter.write_str("Item")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::Stmt::Expr(_val) => {
+ formatter.write_str("Expr")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::Stmt::Semi(_v0, _v1) => {
+ let mut formatter = formatter.debug_tuple("Semi");
+ formatter.field(Lite(_v0));
+ formatter.finish()
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::TraitBound> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TraitBound");
+ if let Some(val) = &_val.paren_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Paren);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("paren_token", Print::ref_cast(val));
+ }
+ formatter.field("modifier", Lite(&_val.modifier));
+ if let Some(val) = &_val.lifetimes {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::BoundLifetimes);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("lifetimes", Print::ref_cast(val));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TraitBoundModifier> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::TraitBoundModifier::None => formatter.write_str("None"),
+ syn::TraitBoundModifier::Maybe(_val) => {
+ formatter.write_str("Maybe")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::TraitItem> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::TraitItem::Const(_val) => {
+ let mut formatter = formatter.debug_struct("TraitItem::Const");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ if let Some(val) = &_val.default {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::Eq, syn::Expr));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("default", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::TraitItem::Method(_val) => {
+ let mut formatter = formatter.debug_struct("TraitItem::Method");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("sig", Lite(&_val.sig));
+ if let Some(val) = &_val.default {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Block);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("default", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::TraitItem::Type(_val) => {
+ let mut formatter = formatter.debug_struct("TraitItem::Type");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ if let Some(val) = &_val.colon_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon_token", Print::ref_cast(val));
+ }
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ if let Some(val) = &_val.default {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::Eq, syn::Type));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("default", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::TraitItem::Macro(_val) => {
+ let mut formatter = formatter.debug_struct("TraitItem::Macro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+ syn::TraitItem::Verbatim(_val) => {
+ formatter.write_str("Verbatim")?;
+ formatter.write_str("(`")?;
+ Display::fmt(_val, formatter)?;
+ formatter.write_str("`)")?;
+ Ok(())
+ }
+ _ => unreachable!(),
+ }
+ }
+}
+impl Debug for Lite<syn::TraitItemConst> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TraitItemConst");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("ty", Lite(&_val.ty));
+ if let Some(val) = &_val.default {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::Eq, syn::Expr));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("default", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TraitItemMacro> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TraitItemMacro");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("mac", Lite(&_val.mac));
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TraitItemMethod> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TraitItemMethod");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("sig", Lite(&_val.sig));
+ if let Some(val) = &_val.default {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Block);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("default", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.semi_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Semi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("semi_token", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TraitItemType> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TraitItemType");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("generics", Lite(&_val.generics));
+ if let Some(val) = &_val.colon_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon_token", Print::ref_cast(val));
+ }
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ if let Some(val) = &_val.default {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::Eq, syn::Type));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("default", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Type> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Type::Array(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Array");
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.field("len", Lite(&_val.len));
+ formatter.finish()
+ }
+ syn::Type::BareFn(_val) => {
+ let mut formatter = formatter.debug_struct("Type::BareFn");
+ if let Some(val) = &_val.lifetimes {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::BoundLifetimes);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("lifetimes", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.unsafety {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Unsafe);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("unsafety", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.abi {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Abi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("abi", Print::ref_cast(val));
+ }
+ if !_val.inputs.is_empty() {
+ formatter.field("inputs", Lite(&_val.inputs));
+ }
+ if let Some(val) = &_val.variadic {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Variadic);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("variadic", Print::ref_cast(val));
+ }
+ formatter.field("output", Lite(&_val.output));
+ formatter.finish()
+ }
+ syn::Type::Group(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Group");
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.finish()
+ }
+ syn::Type::ImplTrait(_val) => {
+ let mut formatter = formatter.debug_struct("Type::ImplTrait");
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ formatter.finish()
+ }
+ syn::Type::Infer(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Infer");
+ formatter.finish()
+ }
+ syn::Type::Macro(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Macro");
+ formatter.field("mac", Lite(&_val.mac));
+ formatter.finish()
+ }
+ syn::Type::Never(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Never");
+ formatter.finish()
+ }
+ syn::Type::Paren(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Paren");
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.finish()
+ }
+ syn::Type::Path(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Path");
+ if let Some(val) = &_val.qself {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::QSelf);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("qself", Print::ref_cast(val));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.finish()
+ }
+ syn::Type::Ptr(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Ptr");
+ if let Some(val) = &_val.const_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Const);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("const_token", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.finish()
+ }
+ syn::Type::Reference(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Reference");
+ if let Some(val) = &_val.lifetime {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Lifetime);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("lifetime", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.finish()
+ }
+ syn::Type::Slice(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Slice");
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.finish()
+ }
+ syn::Type::TraitObject(_val) => {
+ let mut formatter = formatter.debug_struct("Type::TraitObject");
+ if let Some(val) = &_val.dyn_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Dyn);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("dyn_token", Print::ref_cast(val));
+ }
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ formatter.finish()
+ }
+ syn::Type::Tuple(_val) => {
+ let mut formatter = formatter.debug_struct("Type::Tuple");
+ if !_val.elems.is_empty() {
+ formatter.field("elems", Lite(&_val.elems));
+ }
+ formatter.finish()
+ }
+ syn::Type::Verbatim(_val) => {
+ formatter.write_str("Verbatim")?;
+ formatter.write_str("(`")?;
+ Display::fmt(_val, formatter)?;
+ formatter.write_str("`)")?;
+ Ok(())
+ }
+ _ => unreachable!(),
+ }
+ }
+}
+impl Debug for Lite<syn::TypeArray> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeArray");
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.field("len", Lite(&_val.len));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeBareFn> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeBareFn");
+ if let Some(val) = &_val.lifetimes {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::BoundLifetimes);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("lifetimes", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.unsafety {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Unsafe);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("unsafety", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.abi {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Abi);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("abi", Print::ref_cast(val));
+ }
+ if !_val.inputs.is_empty() {
+ formatter.field("inputs", Lite(&_val.inputs));
+ }
+ if let Some(val) = &_val.variadic {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Variadic);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("variadic", Print::ref_cast(val));
+ }
+ formatter.field("output", Lite(&_val.output));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeGroup> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeGroup");
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeImplTrait> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeImplTrait");
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeInfer> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeInfer");
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeMacro> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeMacro");
+ formatter.field("mac", Lite(&_val.mac));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeNever> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeNever");
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeParam> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeParam");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ if let Some(val) = &_val.colon_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Colon);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("colon_token", Print::ref_cast(val));
+ }
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ if let Some(val) = &_val.eq_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Eq);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("eq_token", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.default {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Type);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("default", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeParamBound> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::TypeParamBound::Trait(_val) => {
+ formatter.write_str("Trait")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::TypeParamBound::Lifetime(_val) => {
+ formatter.write_str("Lifetime")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::TypeParen> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeParen");
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypePath> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypePath");
+ if let Some(val) = &_val.qself {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::QSelf);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("qself", Print::ref_cast(val));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypePtr> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypePtr");
+ if let Some(val) = &_val.const_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Const);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("const_token", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeReference> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeReference");
+ if let Some(val) = &_val.lifetime {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::Lifetime);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("lifetime", Print::ref_cast(val));
+ }
+ if let Some(val) = &_val.mutability {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Mut);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("mutability", Print::ref_cast(val));
+ }
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeSlice> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeSlice");
+ formatter.field("elem", Lite(&_val.elem));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeTraitObject> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeTraitObject");
+ if let Some(val) = &_val.dyn_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::Dyn);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("dyn_token", Print::ref_cast(val));
+ }
+ if !_val.bounds.is_empty() {
+ formatter.field("bounds", Lite(&_val.bounds));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::TypeTuple> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("TypeTuple");
+ if !_val.elems.is_empty() {
+ formatter.field("elems", Lite(&_val.elems));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::UnOp> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::UnOp::Deref(_val) => {
+ formatter.write_str("Deref")?;
+ Ok(())
+ }
+ syn::UnOp::Not(_val) => {
+ formatter.write_str("Not")?;
+ Ok(())
+ }
+ syn::UnOp::Neg(_val) => {
+ formatter.write_str("Neg")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::UseGlob> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("UseGlob");
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::UseGroup> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("UseGroup");
+ if !_val.items.is_empty() {
+ formatter.field("items", Lite(&_val.items));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::UseName> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("UseName");
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::UsePath> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("UsePath");
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("tree", Lite(&_val.tree));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::UseRename> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("UseRename");
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("rename", Lite(&_val.rename));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::UseTree> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::UseTree::Path(_val) => {
+ formatter.write_str("Path")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::UseTree::Name(_val) => {
+ formatter.write_str("Name")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::UseTree::Rename(_val) => {
+ formatter.write_str("Rename")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::UseTree::Glob(_val) => {
+ formatter.write_str("Glob")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::UseTree::Group(_val) => {
+ formatter.write_str("Group")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ }
+}
+impl Debug for Lite<syn::Variadic> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Variadic");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Variant> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("Variant");
+ if !_val.attrs.is_empty() {
+ formatter.field("attrs", Lite(&_val.attrs));
+ }
+ formatter.field("ident", Lite(&_val.ident));
+ formatter.field("fields", Lite(&_val.fields));
+ if let Some(val) = &_val.discriminant {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print((syn::token::Eq, syn::Expr));
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ let _val = &self.0;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(&_val.1), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ formatter.field("discriminant", Print::ref_cast(val));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::VisCrate> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("VisCrate");
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::VisPublic> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("VisPublic");
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::VisRestricted> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("VisRestricted");
+ if let Some(val) = &_val.in_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::In);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("in_token", Print::ref_cast(val));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::Visibility> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::Visibility::Public(_val) => {
+ let mut formatter = formatter.debug_struct("Visibility::Public");
+ formatter.finish()
+ }
+ syn::Visibility::Crate(_val) => {
+ let mut formatter = formatter.debug_struct("Visibility::Crate");
+ formatter.finish()
+ }
+ syn::Visibility::Restricted(_val) => {
+ let mut formatter = formatter.debug_struct("Visibility::Restricted");
+ if let Some(val) = &_val.in_token {
+ #[derive(RefCast)]
+ #[repr(transparent)]
+ struct Print(syn::token::In);
+ impl Debug for Print {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("Some")?;
+ Ok(())
+ }
+ }
+ formatter.field("in_token", Print::ref_cast(val));
+ }
+ formatter.field("path", Lite(&_val.path));
+ formatter.finish()
+ }
+ syn::Visibility::Inherited => formatter.write_str("Inherited"),
+ }
+ }
+}
+impl Debug for Lite<syn::WhereClause> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ let mut formatter = formatter.debug_struct("WhereClause");
+ if !_val.predicates.is_empty() {
+ formatter.field("predicates", Lite(&_val.predicates));
+ }
+ formatter.finish()
+ }
+}
+impl Debug for Lite<syn::WherePredicate> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let _val = &self.value;
+ match _val {
+ syn::WherePredicate::Type(_val) => {
+ formatter.write_str("Type")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::WherePredicate::Lifetime(_val) => {
+ formatter.write_str("Lifetime")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ syn::WherePredicate::Eq(_val) => {
+ formatter.write_str("Eq")?;
+ formatter.write_str("(")?;
+ Debug::fmt(Lite(_val), formatter)?;
+ formatter.write_str(")")?;
+ Ok(())
+ }
+ }
+ }
+}
diff --git a/third_party/rust/syn/tests/debug/mod.rs b/third_party/rust/syn/tests/debug/mod.rs
new file mode 100644
index 0000000000..0a0991a924
--- /dev/null
+++ b/third_party/rust/syn/tests/debug/mod.rs
@@ -0,0 +1,125 @@
+#![allow(
+ clippy::no_effect_underscore_binding,
+ clippy::too_many_lines,
+ clippy::used_underscore_binding
+)]
+
+#[rustfmt::skip]
+mod gen;
+
+use proc_macro2::{Ident, Literal, TokenStream};
+use ref_cast::RefCast;
+use std::fmt::{self, Debug};
+use std::ops::Deref;
+use syn::punctuated::Punctuated;
+
+#[derive(RefCast)]
+#[repr(transparent)]
+pub struct Lite<T: ?Sized> {
+ value: T,
+}
+
+#[allow(non_snake_case)]
+pub fn Lite<T: ?Sized>(value: &T) -> &Lite<T> {
+ Lite::ref_cast(value)
+}
+
+impl<T: ?Sized> Deref for Lite<T> {
+ type Target = T;
+
+ fn deref(&self) -> &Self::Target {
+ &self.value
+ }
+}
+
+impl Debug for Lite<bool> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ write!(formatter, "{}", self.value)
+ }
+}
+
+impl Debug for Lite<u32> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ write!(formatter, "{}", self.value)
+ }
+}
+
+impl Debug for Lite<usize> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ write!(formatter, "{}", self.value)
+ }
+}
+
+impl Debug for Lite<String> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ write!(formatter, "{:?}", self.value)
+ }
+}
+
+impl Debug for Lite<Ident> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ write!(formatter, "{:?}", self.value.to_string())
+ }
+}
+
+impl Debug for Lite<Literal> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ write!(formatter, "{}", self.value)
+ }
+}
+
+impl Debug for Lite<TokenStream> {
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ let string = self.value.to_string();
+ if string.len() <= 80 {
+ write!(formatter, "TokenStream(`{}`)", self.value)
+ } else {
+ formatter
+ .debug_tuple("TokenStream")
+ .field(&format_args!("`{}`", string))
+ .finish()
+ }
+ }
+}
+
+impl<'a, T> Debug for Lite<&'a T>
+where
+ Lite<T>: Debug,
+{
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ Debug::fmt(Lite(self.value), formatter)
+ }
+}
+
+impl<T> Debug for Lite<Box<T>>
+where
+ Lite<T>: Debug,
+{
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ Debug::fmt(Lite(&*self.value), formatter)
+ }
+}
+
+impl<T> Debug for Lite<Vec<T>>
+where
+ Lite<T>: Debug,
+{
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter
+ .debug_list()
+ .entries(self.value.iter().map(Lite))
+ .finish()
+ }
+}
+
+impl<T, P> Debug for Lite<Punctuated<T, P>>
+where
+ Lite<T>: Debug,
+{
+ fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter
+ .debug_list()
+ .entries(self.value.iter().map(Lite))
+ .finish()
+ }
+}
diff --git a/third_party/rust/syn/tests/macros/mod.rs b/third_party/rust/syn/tests/macros/mod.rs
new file mode 100644
index 0000000000..5ca88b083b
--- /dev/null
+++ b/third_party/rust/syn/tests/macros/mod.rs
@@ -0,0 +1,79 @@
+#![allow(unused_macros, unused_macro_rules)]
+
+#[path = "../debug/mod.rs"]
+pub mod debug;
+
+use syn::parse::{Parse, Result};
+
+macro_rules! errorf {
+ ($($tt:tt)*) => {{
+ use ::std::io::Write;
+ let stderr = ::std::io::stderr();
+ write!(stderr.lock(), $($tt)*).unwrap();
+ }};
+}
+
+macro_rules! punctuated {
+ ($($e:expr,)+) => {{
+ let mut seq = ::syn::punctuated::Punctuated::new();
+ $(
+ seq.push($e);
+ )+
+ seq
+ }};
+
+ ($($e:expr),+) => {
+ punctuated!($($e,)+)
+ };
+}
+
+macro_rules! snapshot {
+ ($($args:tt)*) => {
+ snapshot_impl!(() $($args)*)
+ };
+}
+
+macro_rules! snapshot_impl {
+ (($expr:ident) as $t:ty, @$snapshot:literal) => {
+ let $expr = crate::macros::Tokens::parse::<$t>($expr).unwrap();
+ let debug = crate::macros::debug::Lite(&$expr);
+ if !cfg!(miri) {
+ insta::assert_debug_snapshot!(debug, @$snapshot);
+ }
+ };
+ (($($expr:tt)*) as $t:ty, @$snapshot:literal) => {{
+ let syntax_tree = crate::macros::Tokens::parse::<$t>($($expr)*).unwrap();
+ let debug = crate::macros::debug::Lite(&syntax_tree);
+ if !cfg!(miri) {
+ insta::assert_debug_snapshot!(debug, @$snapshot);
+ }
+ syntax_tree
+ }};
+ (($($expr:tt)*) , @$snapshot:literal) => {{
+ let syntax_tree = $($expr)*;
+ let debug = crate::macros::debug::Lite(&syntax_tree);
+ if !cfg!(miri) {
+ insta::assert_debug_snapshot!(debug, @$snapshot);
+ }
+ syntax_tree
+ }};
+ (($($expr:tt)*) $next:tt $($rest:tt)*) => {
+ snapshot_impl!(($($expr)* $next) $($rest)*)
+ };
+}
+
+pub trait Tokens {
+ fn parse<T: Parse>(self) -> Result<T>;
+}
+
+impl<'a> Tokens for &'a str {
+ fn parse<T: Parse>(self) -> Result<T> {
+ syn::parse_str(self)
+ }
+}
+
+impl Tokens for proc_macro2::TokenStream {
+ fn parse<T: Parse>(self) -> Result<T> {
+ syn::parse2(self)
+ }
+}
diff --git a/third_party/rust/syn/tests/regression.rs b/third_party/rust/syn/tests/regression.rs
new file mode 100644
index 0000000000..fb2b25c89b
--- /dev/null
+++ b/third_party/rust/syn/tests/regression.rs
@@ -0,0 +1,3 @@
+mod regression {
+ automod::dir!("tests/regression");
+}
diff --git a/third_party/rust/syn/tests/regression/issue1108.rs b/third_party/rust/syn/tests/regression/issue1108.rs
new file mode 100644
index 0000000000..4fd30c0c7a
--- /dev/null
+++ b/third_party/rust/syn/tests/regression/issue1108.rs
@@ -0,0 +1,5 @@
+#[test]
+fn issue1108() {
+ let data = "impl<x<>>::x for";
+ _ = syn::parse_file(data);
+}
diff --git a/third_party/rust/syn/tests/regression/issue1235.rs b/third_party/rust/syn/tests/regression/issue1235.rs
new file mode 100644
index 0000000000..8836030664
--- /dev/null
+++ b/third_party/rust/syn/tests/regression/issue1235.rs
@@ -0,0 +1,32 @@
+use proc_macro2::{Delimiter, Group};
+use quote::quote;
+
+#[test]
+fn main() {
+ // Okay. Rustc allows top-level `static` with no value syntactically, but
+ // not semantically. Syn parses as Item::Verbatim.
+ let tokens = quote! {
+ pub static FOO: usize;
+ pub static BAR: usize;
+ };
+ let file = syn::parse2::<syn::File>(tokens).unwrap();
+ println!("{:#?}", file);
+
+ // Okay.
+ let inner = Group::new(
+ Delimiter::None,
+ quote!(static FOO: usize = 0; pub static BAR: usize = 0),
+ );
+ let tokens = quote!(pub #inner;);
+ let file = syn::parse2::<syn::File>(tokens).unwrap();
+ println!("{:#?}", file);
+
+ // Formerly parser crash.
+ let inner = Group::new(
+ Delimiter::None,
+ quote!(static FOO: usize; pub static BAR: usize),
+ );
+ let tokens = quote!(pub #inner;);
+ let file = syn::parse2::<syn::File>(tokens).unwrap();
+ println!("{:#?}", file);
+}
diff --git a/third_party/rust/syn/tests/repo/mod.rs b/third_party/rust/syn/tests/repo/mod.rs
new file mode 100644
index 0000000000..8418b87192
--- /dev/null
+++ b/third_party/rust/syn/tests/repo/mod.rs
@@ -0,0 +1,215 @@
+#![allow(clippy::manual_assert)]
+
+mod progress;
+
+use self::progress::Progress;
+use anyhow::Result;
+use flate2::read::GzDecoder;
+use std::fs;
+use std::path::Path;
+use tar::Archive;
+use walkdir::DirEntry;
+
+const REVISION: &str = "98ad6a5519651af36e246c0335c964dd52c554ba";
+
+#[rustfmt::skip]
+static EXCLUDE_FILES: &[&str] = &[
+ // TODO: impl ~const T {}
+ // https://github.com/dtolnay/syn/issues/1051
+ "src/test/ui/rfc-2632-const-trait-impl/syntax.rs",
+
+ // Compile-fail expr parameter in const generic position: f::<1 + 2>()
+ "src/test/ui/const-generics/early/closing-args-token.rs",
+ "src/test/ui/const-generics/early/const-expression-parameter.rs",
+
+ // Need at least one trait in impl Trait, no such type as impl 'static
+ "src/test/ui/type-alias-impl-trait/generic_type_does_not_live_long_enough.rs",
+
+ // Deprecated anonymous parameter syntax in traits
+ "src/test/ui/issues/issue-13105.rs",
+ "src/test/ui/issues/issue-13775.rs",
+ "src/test/ui/issues/issue-34074.rs",
+ "src/test/ui/proc-macro/trait-fn-args-2015.rs",
+ "src/tools/rustfmt/tests/source/trait.rs",
+ "src/tools/rustfmt/tests/target/trait.rs",
+
+ // Various extensions to Rust syntax made up by rust-analyzer
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/0012_type_item_where_clause.rs",
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/0040_crate_keyword_vis.rs",
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/0131_existential_type.rs",
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/0179_use_tree_abs_star.rs",
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/0188_const_param_default_path.rs",
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/ok/0015_use_tree.rs",
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/ok/0029_range_forms.rs",
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/ok/0051_parameter_attrs.rs",
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/ok/0055_dot_dot_dot.rs",
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/ok/0068_item_modifiers.rs",
+ "src/tools/rust-analyzer/crates/syntax/test_data/parser/validation/0031_block_inner_attrs.rs",
+ "src/tools/rust-analyzer/crates/syntax/test_data/parser/validation/0045_ambiguous_trait_object.rs",
+ "src/tools/rust-analyzer/crates/syntax/test_data/parser/validation/0046_mutable_const_item.rs",
+
+ // Placeholder syntax for "throw expressions"
+ "src/test/pretty/yeet-expr.rs",
+ "src/test/ui/try-trait/yeet-for-option.rs",
+ "src/test/ui/try-trait/yeet-for-result.rs",
+
+ // Excessive nesting
+ "src/test/ui/issues/issue-74564-if-expr-stack-overflow.rs",
+
+ // Testing tools on invalid syntax
+ "src/test/run-make/translation/test.rs",
+ "src/test/ui/generics/issue-94432-garbage-ice.rs",
+ "src/tools/rustfmt/tests/coverage/target/comments.rs",
+ "src/tools/rustfmt/tests/parser/issue-4126/invalid.rs",
+ "src/tools/rustfmt/tests/parser/issue_4418.rs",
+ "src/tools/rustfmt/tests/parser/unclosed-delims/issue_4466.rs",
+ "src/tools/rustfmt/tests/source/configs/disable_all_formatting/true.rs",
+ "src/tools/rustfmt/tests/source/configs/spaces_around_ranges/false.rs",
+ "src/tools/rustfmt/tests/source/configs/spaces_around_ranges/true.rs",
+ "src/tools/rustfmt/tests/source/type.rs",
+ "src/tools/rustfmt/tests/target/configs/spaces_around_ranges/false.rs",
+ "src/tools/rustfmt/tests/target/configs/spaces_around_ranges/true.rs",
+ "src/tools/rustfmt/tests/target/type.rs",
+
+ // Generated file containing a top-level expression, used with `include!`
+ "compiler/rustc_codegen_gcc/src/intrinsic/archs.rs",
+
+ // Clippy lint lists represented as expressions
+ "src/tools/clippy/clippy_lints/src/lib.deprecated.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_all.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_cargo.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_complexity.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_correctness.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_internal.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_lints.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_nursery.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_pedantic.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_perf.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_restriction.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_style.rs",
+ "src/tools/clippy/clippy_lints/src/lib.register_suspicious.rs",
+
+ // Not actually test cases
+ "src/test/ui/lint/expansion-time-include.rs",
+ "src/test/ui/macros/auxiliary/macro-comma-support.rs",
+ "src/test/ui/macros/auxiliary/macro-include-items-expr.rs",
+ "src/test/ui/macros/include-single-expr-helper.rs",
+ "src/test/ui/macros/include-single-expr-helper-1.rs",
+ "src/test/ui/parser/issues/auxiliary/issue-21146-inc.rs",
+];
+
+#[rustfmt::skip]
+static EXCLUDE_DIRS: &[&str] = &[
+ // Inputs that intentionally do not parse
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/err",
+ "src/tools/rust-analyzer/crates/parser/test_data/parser/inline/err",
+
+ // Inputs that lex but do not necessarily parse
+ "src/tools/rust-analyzer/crates/parser/test_data/lexer",
+
+ // Inputs that used to crash rust-analyzer, but aren't necessarily supposed to parse
+ "src/tools/rust-analyzer/crates/syntax/test_data/parser/fuzz-failures",
+ "src/tools/rust-analyzer/crates/syntax/test_data/reparse/fuzz-failures",
+];
+
+pub fn base_dir_filter(entry: &DirEntry) -> bool {
+ let path = entry.path();
+
+ let mut path_string = path.to_string_lossy();
+ if cfg!(windows) {
+ path_string = path_string.replace('\\', "/").into();
+ }
+ let path_string = if path_string == "tests/rust" {
+ return true;
+ } else if let Some(path) = path_string.strip_prefix("tests/rust/") {
+ path
+ } else {
+ panic!("unexpected path in Rust dist: {}", path_string);
+ };
+
+ if path.is_dir() {
+ return !EXCLUDE_DIRS.contains(&path_string);
+ }
+
+ if path.extension().map_or(true, |e| e != "rs") {
+ return false;
+ }
+
+ if path_string.starts_with("src/test/ui") || path_string.starts_with("src/test/rustdoc-ui") {
+ let stderr_path = path.with_extension("stderr");
+ if stderr_path.exists() {
+ // Expected to fail in some way
+ return false;
+ }
+ }
+
+ !EXCLUDE_FILES.contains(&path_string)
+}
+
+#[allow(dead_code)]
+pub fn edition(path: &Path) -> &'static str {
+ if path.ends_with("dyn-2015-no-warnings-without-lints.rs") {
+ "2015"
+ } else {
+ "2018"
+ }
+}
+
+pub fn clone_rust() {
+ let needs_clone = match fs::read_to_string("tests/rust/COMMIT") {
+ Err(_) => true,
+ Ok(contents) => contents.trim() != REVISION,
+ };
+ if needs_clone {
+ download_and_unpack().unwrap();
+ }
+ let mut missing = String::new();
+ let test_src = Path::new("tests/rust");
+ for exclude in EXCLUDE_FILES {
+ if !test_src.join(exclude).is_file() {
+ missing += "\ntests/rust/";
+ missing += exclude;
+ }
+ }
+ for exclude in EXCLUDE_DIRS {
+ if !test_src.join(exclude).is_dir() {
+ missing += "\ntests/rust/";
+ missing += exclude;
+ missing += "/";
+ }
+ }
+ if !missing.is_empty() {
+ panic!("excluded test file does not exist:{}\n", missing);
+ }
+}
+
+fn download_and_unpack() -> Result<()> {
+ let url = format!(
+ "https://github.com/rust-lang/rust/archive/{}.tar.gz",
+ REVISION
+ );
+ let response = reqwest::blocking::get(url)?.error_for_status()?;
+ let progress = Progress::new(response);
+ let decoder = GzDecoder::new(progress);
+ let mut archive = Archive::new(decoder);
+ let prefix = format!("rust-{}", REVISION);
+
+ let tests_rust = Path::new("tests/rust");
+ if tests_rust.exists() {
+ fs::remove_dir_all(tests_rust)?;
+ }
+
+ for entry in archive.entries()? {
+ let mut entry = entry?;
+ let path = entry.path()?;
+ if path == Path::new("pax_global_header") {
+ continue;
+ }
+ let relative = path.strip_prefix(&prefix)?;
+ let out = tests_rust.join(relative);
+ entry.unpack(&out)?;
+ }
+
+ fs::write("tests/rust/COMMIT", REVISION)?;
+ Ok(())
+}
diff --git a/third_party/rust/syn/tests/repo/progress.rs b/third_party/rust/syn/tests/repo/progress.rs
new file mode 100644
index 0000000000..28c8a44b12
--- /dev/null
+++ b/third_party/rust/syn/tests/repo/progress.rs
@@ -0,0 +1,37 @@
+use std::io::{Read, Result};
+use std::time::{Duration, Instant};
+
+pub struct Progress<R> {
+ bytes: usize,
+ tick: Instant,
+ stream: R,
+}
+
+impl<R> Progress<R> {
+ pub fn new(stream: R) -> Self {
+ Progress {
+ bytes: 0,
+ tick: Instant::now() + Duration::from_millis(2000),
+ stream,
+ }
+ }
+}
+
+impl<R: Read> Read for Progress<R> {
+ fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
+ let num = self.stream.read(buf)?;
+ self.bytes += num;
+ let now = Instant::now();
+ if now > self.tick {
+ self.tick = now + Duration::from_millis(500);
+ errorf!("downloading... {} bytes\n", self.bytes);
+ }
+ Ok(num)
+ }
+}
+
+impl<R> Drop for Progress<R> {
+ fn drop(&mut self) {
+ errorf!("done ({} bytes)\n", self.bytes);
+ }
+}
diff --git a/third_party/rust/syn/tests/test_asyncness.rs b/third_party/rust/syn/tests/test_asyncness.rs
new file mode 100644
index 0000000000..0efef5976f
--- /dev/null
+++ b/third_party/rust/syn/tests/test_asyncness.rs
@@ -0,0 +1,37 @@
+#[macro_use]
+mod macros;
+
+use syn::{Expr, Item};
+
+#[test]
+fn test_async_fn() {
+ let input = "async fn process() {}";
+
+ snapshot!(input as Item, @r###"
+ Item::Fn {
+ vis: Inherited,
+ sig: Signature {
+ asyncness: Some,
+ ident: "process",
+ generics: Generics,
+ output: Default,
+ },
+ block: Block,
+ }
+ "###);
+}
+
+#[test]
+fn test_async_closure() {
+ let input = "async || {}";
+
+ snapshot!(input as Expr, @r###"
+ Expr::Closure {
+ asyncness: Some,
+ output: Default,
+ body: Expr::Block {
+ block: Block,
+ },
+ }
+ "###);
+}
diff --git a/third_party/rust/syn/tests/test_attribute.rs b/third_party/rust/syn/tests/test_attribute.rs
new file mode 100644
index 0000000000..c26bd090ec
--- /dev/null
+++ b/third_party/rust/syn/tests/test_attribute.rs
@@ -0,0 +1,336 @@
+#[macro_use]
+mod macros;
+
+use syn::parse::Parser;
+use syn::{Attribute, Meta};
+
+#[test]
+fn test_meta_item_word() {
+ let meta = test("#[foo]");
+
+ snapshot!(meta, @r###"
+ Path(Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ })
+ "###);
+}
+
+#[test]
+fn test_meta_item_name_value() {
+ let meta = test("#[foo = 5]");
+
+ snapshot!(meta, @r###"
+ Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }
+ "###);
+}
+
+#[test]
+fn test_meta_item_bool_value() {
+ let meta = test("#[foo = true]");
+
+ snapshot!(meta, @r###"
+ Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ lit: Lit::Bool {
+ value: true,
+ },
+ }
+ "###);
+
+ let meta = test("#[foo = false]");
+
+ snapshot!(meta, @r###"
+ Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ lit: Lit::Bool {
+ value: false,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_meta_item_list_lit() {
+ let meta = test("#[foo(5)]");
+
+ snapshot!(meta, @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Lit(5),
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_meta_item_list_word() {
+ let meta = test("#[foo(bar)]");
+
+ snapshot!(meta, @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Path(Path {
+ segments: [
+ PathSegment {
+ ident: "bar",
+ arguments: None,
+ },
+ ],
+ })),
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_meta_item_list_name_value() {
+ let meta = test("#[foo(bar = 5)]");
+
+ snapshot!(meta, @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "bar",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }),
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_meta_item_list_bool_value() {
+ let meta = test("#[foo(bar = true)]");
+
+ snapshot!(meta, @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "bar",
+ arguments: None,
+ },
+ ],
+ },
+ lit: Lit::Bool {
+ value: true,
+ },
+ }),
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_meta_item_multiple() {
+ let meta = test("#[foo(word, name = 5, list(name2 = 6), word2)]");
+
+ snapshot!(meta, @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Path(Path {
+ segments: [
+ PathSegment {
+ ident: "word",
+ arguments: None,
+ },
+ ],
+ })),
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "name",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }),
+ Meta(Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "list",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "name2",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 6,
+ }),
+ ],
+ }),
+ Meta(Path(Path {
+ segments: [
+ PathSegment {
+ ident: "word2",
+ arguments: None,
+ },
+ ],
+ })),
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_bool_lit() {
+ let meta = test("#[foo(true)]");
+
+ snapshot!(meta, @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Lit(Lit::Bool {
+ value: true,
+ }),
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_negative_lit() {
+ let meta = test("#[form(min = -1, max = 200)]");
+
+ snapshot!(meta, @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "form",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "min",
+ arguments: None,
+ },
+ ],
+ },
+ lit: -1,
+ }),
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "max",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 200,
+ }),
+ ],
+ }
+ "###);
+}
+
+fn test(input: &str) -> Meta {
+ let attrs = Attribute::parse_outer.parse_str(input).unwrap();
+
+ assert_eq!(attrs.len(), 1);
+ let attr = attrs.into_iter().next().unwrap();
+
+ attr.parse_meta().unwrap()
+}
diff --git a/third_party/rust/syn/tests/test_derive_input.rs b/third_party/rust/syn/tests/test_derive_input.rs
new file mode 100644
index 0000000000..1eff01186a
--- /dev/null
+++ b/third_party/rust/syn/tests/test_derive_input.rs
@@ -0,0 +1,894 @@
+#![allow(clippy::assertions_on_result_states, clippy::too_many_lines)]
+
+#[macro_use]
+mod macros;
+
+use quote::quote;
+use syn::{Data, DeriveInput};
+
+#[test]
+fn test_unit() {
+ let input = quote! {
+ struct Unit;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Inherited,
+ ident: "Unit",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_struct() {
+ let input = quote! {
+ #[derive(Debug, Clone)]
+ pub struct Item {
+ pub ident: Ident,
+ pub attrs: Vec<Attribute>
+ }
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ attrs: [
+ Attribute {
+ style: Outer,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "derive",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(`(Debug , Clone)`),
+ },
+ ],
+ vis: Visibility::Public,
+ ident: "Item",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Named {
+ named: [
+ Field {
+ vis: Visibility::Public,
+ ident: Some("ident"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Ident",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ Field {
+ vis: Visibility::Public,
+ ident: Some("attrs"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Vec",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ Type(Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Attribute",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ },
+ }
+ "###);
+
+ snapshot!(input.attrs[0].parse_meta().unwrap(), @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "derive",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Path(Path {
+ segments: [
+ PathSegment {
+ ident: "Debug",
+ arguments: None,
+ },
+ ],
+ })),
+ Meta(Path(Path {
+ segments: [
+ PathSegment {
+ ident: "Clone",
+ arguments: None,
+ },
+ ],
+ })),
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_union() {
+ let input = quote! {
+ union MaybeUninit<T> {
+ uninit: (),
+ value: T
+ }
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Inherited,
+ ident: "MaybeUninit",
+ generics: Generics {
+ lt_token: Some,
+ params: [
+ Type(TypeParam {
+ ident: "T",
+ }),
+ ],
+ gt_token: Some,
+ },
+ data: Data::Union {
+ fields: FieldsNamed {
+ named: [
+ Field {
+ vis: Inherited,
+ ident: Some("uninit"),
+ colon_token: Some,
+ ty: Type::Tuple,
+ },
+ Field {
+ vis: Inherited,
+ ident: Some("value"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ },
+ }
+ "###);
+}
+
+#[test]
+#[cfg(feature = "full")]
+fn test_enum() {
+ let input = quote! {
+ /// See the std::result module documentation for details.
+ #[must_use]
+ pub enum Result<T, E> {
+ Ok(T),
+ Err(E),
+ Surprise = 0isize,
+
+ // Smuggling data into a proc_macro_derive,
+ // in the style of https://github.com/dtolnay/proc-macro-hack
+ ProcMacroHack = (0, "data").0
+ }
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ attrs: [
+ Attribute {
+ style: Outer,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "doc",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(`= r" See the std::result module documentation for details."`),
+ },
+ Attribute {
+ style: Outer,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "must_use",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(``),
+ },
+ ],
+ vis: Visibility::Public,
+ ident: "Result",
+ generics: Generics {
+ lt_token: Some,
+ params: [
+ Type(TypeParam {
+ ident: "T",
+ }),
+ Type(TypeParam {
+ ident: "E",
+ }),
+ ],
+ gt_token: Some,
+ },
+ data: Data::Enum {
+ variants: [
+ Variant {
+ ident: "Ok",
+ fields: Fields::Unnamed {
+ unnamed: [
+ Field {
+ vis: Inherited,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ },
+ Variant {
+ ident: "Err",
+ fields: Fields::Unnamed {
+ unnamed: [
+ Field {
+ vis: Inherited,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "E",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ },
+ Variant {
+ ident: "Surprise",
+ fields: Unit,
+ discriminant: Some(Expr::Lit {
+ lit: 0isize,
+ }),
+ },
+ Variant {
+ ident: "ProcMacroHack",
+ fields: Unit,
+ discriminant: Some(Expr::Field {
+ base: Expr::Tuple {
+ elems: [
+ Expr::Lit {
+ lit: 0,
+ },
+ Expr::Lit {
+ lit: "data",
+ },
+ ],
+ },
+ member: Unnamed(Index {
+ index: 0,
+ }),
+ }),
+ },
+ ],
+ },
+ }
+ "###);
+
+ let meta_items: Vec<_> = input
+ .attrs
+ .into_iter()
+ .map(|attr| attr.parse_meta().unwrap())
+ .collect();
+
+ snapshot!(meta_items, @r###"
+ [
+ Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "doc",
+ arguments: None,
+ },
+ ],
+ },
+ lit: " See the std::result module documentation for details.",
+ },
+ Path(Path {
+ segments: [
+ PathSegment {
+ ident: "must_use",
+ arguments: None,
+ },
+ ],
+ }),
+ ]
+ "###);
+}
+
+#[test]
+fn test_attr_with_path() {
+ let input = quote! {
+ #[::attr_args::identity
+ fn main() { assert_eq!(foo(), "Hello, world!"); }]
+ struct Dummy;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ attrs: [
+ Attribute {
+ style: Outer,
+ path: Path {
+ leading_colon: Some,
+ segments: [
+ PathSegment {
+ ident: "attr_args",
+ arguments: None,
+ },
+ PathSegment {
+ ident: "identity",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(`fn main () { assert_eq ! (foo () , "Hello, world!") ; }`),
+ },
+ ],
+ vis: Inherited,
+ ident: "Dummy",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+
+ assert!(input.attrs[0].parse_meta().is_err());
+}
+
+#[test]
+fn test_attr_with_non_mod_style_path() {
+ let input = quote! {
+ #[inert <T>]
+ struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ attrs: [
+ Attribute {
+ style: Outer,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "inert",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(`< T >`),
+ },
+ ],
+ vis: Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+
+ assert!(input.attrs[0].parse_meta().is_err());
+}
+
+#[test]
+fn test_attr_with_mod_style_path_with_self() {
+ let input = quote! {
+ #[foo::self]
+ struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ attrs: [
+ Attribute {
+ style: Outer,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ PathSegment {
+ ident: "self",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(``),
+ },
+ ],
+ vis: Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+
+ snapshot!(input.attrs[0].parse_meta().unwrap(), @r###"
+ Path(Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ PathSegment {
+ ident: "self",
+ arguments: None,
+ },
+ ],
+ })
+ "###);
+}
+
+#[test]
+fn test_pub_restricted() {
+ // Taken from tests/rust/src/test/ui/resolve/auxiliary/privacy-struct-ctor.rs
+ let input = quote! {
+ pub(in m) struct Z(pub(in m::n) u8);
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Restricted {
+ in_token: Some,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "m",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ ident: "Z",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unnamed {
+ unnamed: [
+ Field {
+ vis: Visibility::Restricted {
+ in_token: Some,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "m",
+ arguments: None,
+ },
+ PathSegment {
+ ident: "n",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "u8",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_vis_crate() {
+ let input = quote! {
+ crate struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Crate,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_pub_restricted_crate() {
+ let input = quote! {
+ pub(crate) struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Restricted {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "crate",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_pub_restricted_super() {
+ let input = quote! {
+ pub(super) struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Restricted {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "super",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_pub_restricted_in_super() {
+ let input = quote! {
+ pub(in super) struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Restricted {
+ in_token: Some,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "super",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_fields_on_unit_struct() {
+ let input = quote! {
+ struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+
+ let data = match input.data {
+ Data::Struct(data) => data,
+ _ => panic!("expected a struct"),
+ };
+
+ assert_eq!(0, data.fields.iter().count());
+}
+
+#[test]
+fn test_fields_on_named_struct() {
+ let input = quote! {
+ struct S {
+ foo: i32,
+ pub bar: String,
+ }
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Named {
+ named: [
+ Field {
+ vis: Inherited,
+ ident: Some("foo"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "i32",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ Field {
+ vis: Visibility::Public,
+ ident: Some("bar"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "String",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ },
+ }
+ "###);
+
+ let data = match input.data {
+ Data::Struct(data) => data,
+ _ => panic!("expected a struct"),
+ };
+
+ snapshot!(data.fields.into_iter().collect::<Vec<_>>(), @r###"
+ [
+ Field {
+ vis: Inherited,
+ ident: Some("foo"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "i32",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ Field {
+ vis: Visibility::Public,
+ ident: Some("bar"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "String",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ ]
+ "###);
+}
+
+#[test]
+fn test_fields_on_tuple_struct() {
+ let input = quote! {
+ struct S(i32, pub String);
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unnamed {
+ unnamed: [
+ Field {
+ vis: Inherited,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "i32",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ Field {
+ vis: Visibility::Public,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "String",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ semi_token: Some,
+ },
+ }
+ "###);
+
+ let data = match input.data {
+ Data::Struct(data) => data,
+ _ => panic!("expected a struct"),
+ };
+
+ snapshot!(data.fields.iter().collect::<Vec<_>>(), @r###"
+ [
+ Field {
+ vis: Inherited,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "i32",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ Field {
+ vis: Visibility::Public,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "String",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ ]
+ "###);
+}
+
+#[test]
+fn test_ambiguous_crate() {
+ let input = quote! {
+ // The field type is `(crate::X)` not `crate (::X)`.
+ struct S(crate::X);
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unnamed {
+ unnamed: [
+ Field {
+ vis: Inherited,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "crate",
+ arguments: None,
+ },
+ PathSegment {
+ ident: "X",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ semi_token: Some,
+ },
+ }
+ "###);
+}
diff --git a/third_party/rust/syn/tests/test_expr.rs b/third_party/rust/syn/tests/test_expr.rs
new file mode 100644
index 0000000000..e5b151fd80
--- /dev/null
+++ b/third_party/rust/syn/tests/test_expr.rs
@@ -0,0 +1,306 @@
+#[macro_use]
+mod macros;
+
+use proc_macro2::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree};
+use quote::quote;
+use std::iter::FromIterator;
+use syn::{Expr, ExprRange};
+
+#[test]
+fn test_expr_parse() {
+ let tokens = quote!(..100u32);
+ snapshot!(tokens as Expr, @r###"
+ Expr::Range {
+ limits: HalfOpen,
+ to: Some(Expr::Lit {
+ lit: 100u32,
+ }),
+ }
+ "###);
+
+ let tokens = quote!(..100u32);
+ snapshot!(tokens as ExprRange, @r###"
+ ExprRange {
+ limits: HalfOpen,
+ to: Some(Expr::Lit {
+ lit: 100u32,
+ }),
+ }
+ "###);
+}
+
+#[test]
+fn test_await() {
+ // Must not parse as Expr::Field.
+ let tokens = quote!(fut.await);
+
+ snapshot!(tokens as Expr, @r###"
+ Expr::Await {
+ base: Expr::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "fut",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ }
+ "###);
+}
+
+#[rustfmt::skip]
+#[test]
+fn test_tuple_multi_index() {
+ let expected = snapshot!("tuple.0.0" as Expr, @r###"
+ Expr::Field {
+ base: Expr::Field {
+ base: Expr::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "tuple",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ member: Unnamed(Index {
+ index: 0,
+ }),
+ },
+ member: Unnamed(Index {
+ index: 0,
+ }),
+ }
+ "###);
+
+ for &input in &[
+ "tuple .0.0",
+ "tuple. 0.0",
+ "tuple.0 .0",
+ "tuple.0. 0",
+ "tuple . 0 . 0",
+ ] {
+ assert_eq!(expected, syn::parse_str(input).unwrap());
+ }
+
+ for tokens in vec![
+ quote!(tuple.0.0),
+ quote!(tuple .0.0),
+ quote!(tuple. 0.0),
+ quote!(tuple.0 .0),
+ quote!(tuple.0. 0),
+ quote!(tuple . 0 . 0),
+ ] {
+ assert_eq!(expected, syn::parse2(tokens).unwrap());
+ }
+}
+
+#[test]
+fn test_macro_variable_func() {
+ // mimics the token stream corresponding to `$fn()`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { f })),
+ TokenTree::Group(Group::new(Delimiter::Parenthesis, TokenStream::new())),
+ ]);
+
+ snapshot!(tokens as Expr, @r###"
+ Expr::Call {
+ func: Expr::Group {
+ expr: Expr::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "f",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ }
+ "###);
+
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Punct(Punct::new('#', Spacing::Alone)),
+ TokenTree::Group(Group::new(Delimiter::Bracket, quote! { outside })),
+ TokenTree::Group(Group::new(Delimiter::None, quote! { #[inside] f })),
+ TokenTree::Group(Group::new(Delimiter::Parenthesis, TokenStream::new())),
+ ]);
+
+ snapshot!(tokens as Expr, @r###"
+ Expr::Call {
+ attrs: [
+ Attribute {
+ style: Outer,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "outside",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(``),
+ },
+ ],
+ func: Expr::Group {
+ expr: Expr::Path {
+ attrs: [
+ Attribute {
+ style: Outer,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "inside",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(``),
+ },
+ ],
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "f",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_macro_variable_macro() {
+ // mimics the token stream corresponding to `$macro!()`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { m })),
+ TokenTree::Punct(Punct::new('!', Spacing::Alone)),
+ TokenTree::Group(Group::new(Delimiter::Parenthesis, TokenStream::new())),
+ ]);
+
+ snapshot!(tokens as Expr, @r###"
+ Expr::Macro {
+ mac: Macro {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "m",
+ arguments: None,
+ },
+ ],
+ },
+ delimiter: Paren,
+ tokens: TokenStream(``),
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_macro_variable_struct() {
+ // mimics the token stream corresponding to `$struct {}`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { S })),
+ TokenTree::Group(Group::new(Delimiter::Brace, TokenStream::new())),
+ ]);
+
+ snapshot!(tokens as Expr, @r###"
+ Expr::Struct {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "S",
+ arguments: None,
+ },
+ ],
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_macro_variable_match_arm() {
+ // mimics the token stream corresponding to `match v { _ => $expr }`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Ident(Ident::new("match", Span::call_site())),
+ TokenTree::Ident(Ident::new("v", Span::call_site())),
+ TokenTree::Group(Group::new(
+ Delimiter::Brace,
+ TokenStream::from_iter(vec![
+ TokenTree::Punct(Punct::new('_', Spacing::Alone)),
+ TokenTree::Punct(Punct::new('=', Spacing::Joint)),
+ TokenTree::Punct(Punct::new('>', Spacing::Alone)),
+ TokenTree::Group(Group::new(Delimiter::None, quote! { #[a] () })),
+ ]),
+ )),
+ ]);
+
+ snapshot!(tokens as Expr, @r###"
+ Expr::Match {
+ expr: Expr::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "v",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ arms: [
+ Arm {
+ pat: Pat::Wild,
+ body: Expr::Group {
+ expr: Expr::Tuple {
+ attrs: [
+ Attribute {
+ style: Outer,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "a",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(``),
+ },
+ ],
+ },
+ },
+ },
+ ],
+ }
+ "###);
+}
+
+// https://github.com/dtolnay/syn/issues/1019
+#[test]
+fn test_closure_vs_rangefull() {
+ #[rustfmt::skip] // rustfmt bug: https://github.com/rust-lang/rustfmt/issues/4808
+ let tokens = quote!(|| .. .method());
+ snapshot!(tokens as Expr, @r###"
+ Expr::MethodCall {
+ receiver: Expr::Closure {
+ output: Default,
+ body: Expr::Range {
+ limits: HalfOpen,
+ },
+ },
+ method: "method",
+ }
+ "###);
+}
+
+#[test]
+fn test_postfix_operator_after_cast() {
+ syn::parse_str::<Expr>("|| &x as T[0]").unwrap_err();
+ syn::parse_str::<Expr>("|| () as ()()").unwrap_err();
+}
diff --git a/third_party/rust/syn/tests/test_generics.rs b/third_party/rust/syn/tests/test_generics.rs
new file mode 100644
index 0000000000..330f02f4dc
--- /dev/null
+++ b/third_party/rust/syn/tests/test_generics.rs
@@ -0,0 +1,285 @@
+#![allow(clippy::too_many_lines)]
+
+#[macro_use]
+mod macros;
+
+use quote::quote;
+use syn::{DeriveInput, ItemFn, TypeParamBound, WhereClause, WherePredicate};
+
+#[test]
+fn test_split_for_impl() {
+ let input = quote! {
+ struct S<'a, 'b: 'a, #[may_dangle] T: 'a = ()> where T: Debug;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Inherited,
+ ident: "S",
+ generics: Generics {
+ lt_token: Some,
+ params: [
+ Lifetime(LifetimeDef {
+ lifetime: Lifetime {
+ ident: "a",
+ },
+ }),
+ Lifetime(LifetimeDef {
+ lifetime: Lifetime {
+ ident: "b",
+ },
+ colon_token: Some,
+ bounds: [
+ Lifetime {
+ ident: "a",
+ },
+ ],
+ }),
+ Type(TypeParam {
+ attrs: [
+ Attribute {
+ style: Outer,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "may_dangle",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(``),
+ },
+ ],
+ ident: "T",
+ colon_token: Some,
+ bounds: [
+ Lifetime(Lifetime {
+ ident: "a",
+ }),
+ ],
+ eq_token: Some,
+ default: Some(Type::Tuple),
+ }),
+ ],
+ gt_token: Some,
+ where_clause: Some(WhereClause {
+ predicates: [
+ Type(PredicateType {
+ bounded_ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ bounds: [
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Debug",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ }),
+ ],
+ }),
+ },
+ data: Data::Struct {
+ fields: Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+
+ let generics = input.generics;
+ let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
+
+ let generated = quote! {
+ impl #impl_generics MyTrait for Test #ty_generics #where_clause {}
+ };
+ let expected = quote! {
+ impl<'a, 'b: 'a, #[may_dangle] T: 'a> MyTrait
+ for Test<'a, 'b, T>
+ where
+ T: Debug
+ {}
+ };
+ assert_eq!(generated.to_string(), expected.to_string());
+
+ let turbofish = ty_generics.as_turbofish();
+ let generated = quote! {
+ Test #turbofish
+ };
+ let expected = quote! {
+ Test::<'a, 'b, T>
+ };
+ assert_eq!(generated.to_string(), expected.to_string());
+}
+
+#[test]
+fn test_ty_param_bound() {
+ let tokens = quote!('a);
+ snapshot!(tokens as TypeParamBound, @r###"
+ Lifetime(Lifetime {
+ ident: "a",
+ })
+ "###);
+
+ let tokens = quote!('_);
+ snapshot!(tokens as TypeParamBound, @r###"
+ Lifetime(Lifetime {
+ ident: "_",
+ })
+ "###);
+
+ let tokens = quote!(Debug);
+ snapshot!(tokens as TypeParamBound, @r###"
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Debug",
+ arguments: None,
+ },
+ ],
+ },
+ })
+ "###);
+
+ let tokens = quote!(?Sized);
+ snapshot!(tokens as TypeParamBound, @r###"
+ Trait(TraitBound {
+ modifier: Maybe,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Sized",
+ arguments: None,
+ },
+ ],
+ },
+ })
+ "###);
+}
+
+#[test]
+fn test_fn_precedence_in_where_clause() {
+ // This should parse as two separate bounds, `FnOnce() -> i32` and `Send` - not
+ // `FnOnce() -> (i32 + Send)`.
+ let input = quote! {
+ fn f<G>()
+ where
+ G: FnOnce() -> i32 + Send,
+ {
+ }
+ };
+
+ snapshot!(input as ItemFn, @r###"
+ ItemFn {
+ vis: Inherited,
+ sig: Signature {
+ ident: "f",
+ generics: Generics {
+ lt_token: Some,
+ params: [
+ Type(TypeParam {
+ ident: "G",
+ }),
+ ],
+ gt_token: Some,
+ where_clause: Some(WhereClause {
+ predicates: [
+ Type(PredicateType {
+ bounded_ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "G",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ bounds: [
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "FnOnce",
+ arguments: PathArguments::Parenthesized {
+ output: Type(
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "i32",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ ),
+ },
+ },
+ ],
+ },
+ }),
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Send",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ }),
+ ],
+ }),
+ },
+ output: Default,
+ },
+ block: Block,
+ }
+ "###);
+
+ let where_clause = input.sig.generics.where_clause.as_ref().unwrap();
+ assert_eq!(where_clause.predicates.len(), 1);
+
+ let predicate = match &where_clause.predicates[0] {
+ WherePredicate::Type(pred) => pred,
+ _ => panic!("wrong predicate kind"),
+ };
+
+ assert_eq!(predicate.bounds.len(), 2, "{:#?}", predicate.bounds);
+
+ let first_bound = &predicate.bounds[0];
+ assert_eq!(quote!(#first_bound).to_string(), "FnOnce () -> i32");
+
+ let second_bound = &predicate.bounds[1];
+ assert_eq!(quote!(#second_bound).to_string(), "Send");
+}
+
+#[test]
+fn test_where_clause_at_end_of_input() {
+ let input = quote! {
+ where
+ };
+
+ snapshot!(input as WhereClause, @"WhereClause");
+
+ assert_eq!(input.predicates.len(), 0);
+}
diff --git a/third_party/rust/syn/tests/test_grouping.rs b/third_party/rust/syn/tests/test_grouping.rs
new file mode 100644
index 0000000000..9eb7eee9b7
--- /dev/null
+++ b/third_party/rust/syn/tests/test_grouping.rs
@@ -0,0 +1,52 @@
+#[macro_use]
+mod macros;
+
+use proc_macro2::{Delimiter, Group, Literal, Punct, Spacing, TokenStream, TokenTree};
+use std::iter::FromIterator;
+use syn::Expr;
+
+#[test]
+fn test_grouping() {
+ let tokens: TokenStream = TokenStream::from_iter(vec![
+ TokenTree::Literal(Literal::i32_suffixed(1)),
+ TokenTree::Punct(Punct::new('+', Spacing::Alone)),
+ TokenTree::Group(Group::new(
+ Delimiter::None,
+ TokenStream::from_iter(vec![
+ TokenTree::Literal(Literal::i32_suffixed(2)),
+ TokenTree::Punct(Punct::new('+', Spacing::Alone)),
+ TokenTree::Literal(Literal::i32_suffixed(3)),
+ ]),
+ )),
+ TokenTree::Punct(Punct::new('*', Spacing::Alone)),
+ TokenTree::Literal(Literal::i32_suffixed(4)),
+ ]);
+
+ assert_eq!(tokens.to_string(), "1i32 + 2i32 + 3i32 * 4i32");
+
+ snapshot!(tokens as Expr, @r###"
+ Expr::Binary {
+ left: Expr::Lit {
+ lit: 1i32,
+ },
+ op: Add,
+ right: Expr::Binary {
+ left: Expr::Group {
+ expr: Expr::Binary {
+ left: Expr::Lit {
+ lit: 2i32,
+ },
+ op: Add,
+ right: Expr::Lit {
+ lit: 3i32,
+ },
+ },
+ },
+ op: Mul,
+ right: Expr::Lit {
+ lit: 4i32,
+ },
+ },
+ }
+ "###);
+}
diff --git a/third_party/rust/syn/tests/test_ident.rs b/third_party/rust/syn/tests/test_ident.rs
new file mode 100644
index 0000000000..ee01bfcc9f
--- /dev/null
+++ b/third_party/rust/syn/tests/test_ident.rs
@@ -0,0 +1,85 @@
+use proc_macro2::{Ident, Span, TokenStream};
+use std::str::FromStr;
+use syn::Result;
+
+fn parse(s: &str) -> Result<Ident> {
+ syn::parse2(TokenStream::from_str(s).unwrap())
+}
+
+fn new(s: &str) -> Ident {
+ Ident::new(s, Span::call_site())
+}
+
+#[test]
+fn ident_parse() {
+ parse("String").unwrap();
+}
+
+#[test]
+fn ident_parse_keyword() {
+ parse("abstract").unwrap_err();
+}
+
+#[test]
+fn ident_parse_empty() {
+ parse("").unwrap_err();
+}
+
+#[test]
+fn ident_parse_lifetime() {
+ parse("'static").unwrap_err();
+}
+
+#[test]
+fn ident_parse_underscore() {
+ parse("_").unwrap_err();
+}
+
+#[test]
+fn ident_parse_number() {
+ parse("255").unwrap_err();
+}
+
+#[test]
+fn ident_parse_invalid() {
+ parse("a#").unwrap_err();
+}
+
+#[test]
+fn ident_new() {
+ new("String");
+}
+
+#[test]
+fn ident_new_keyword() {
+ new("abstract");
+}
+
+#[test]
+#[should_panic(expected = "use Option<Ident>")]
+fn ident_new_empty() {
+ new("");
+}
+
+#[test]
+#[should_panic(expected = "not a valid Ident")]
+fn ident_new_lifetime() {
+ new("'static");
+}
+
+#[test]
+fn ident_new_underscore() {
+ new("_");
+}
+
+#[test]
+#[should_panic(expected = "use Literal instead")]
+fn ident_new_number() {
+ new("255");
+}
+
+#[test]
+#[should_panic(expected = "\"a#\" is not a valid Ident")]
+fn ident_new_invalid() {
+ new("a#");
+}
diff --git a/third_party/rust/syn/tests/test_item.rs b/third_party/rust/syn/tests/test_item.rs
new file mode 100644
index 0000000000..96df4b1aad
--- /dev/null
+++ b/third_party/rust/syn/tests/test_item.rs
@@ -0,0 +1,336 @@
+#[macro_use]
+mod macros;
+
+use proc_macro2::{Delimiter, Group, Ident, Span, TokenStream, TokenTree};
+use quote::quote;
+use std::iter::FromIterator;
+use syn::{Item, ItemTrait};
+
+#[test]
+fn test_macro_variable_attr() {
+ // mimics the token stream corresponding to `$attr fn f() {}`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { #[test] })),
+ TokenTree::Ident(Ident::new("fn", Span::call_site())),
+ TokenTree::Ident(Ident::new("f", Span::call_site())),
+ TokenTree::Group(Group::new(Delimiter::Parenthesis, TokenStream::new())),
+ TokenTree::Group(Group::new(Delimiter::Brace, TokenStream::new())),
+ ]);
+
+ snapshot!(tokens as Item, @r###"
+ Item::Fn {
+ attrs: [
+ Attribute {
+ style: Outer,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "test",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(``),
+ },
+ ],
+ vis: Inherited,
+ sig: Signature {
+ ident: "f",
+ generics: Generics,
+ output: Default,
+ },
+ block: Block,
+ }
+ "###);
+}
+
+#[test]
+fn test_negative_impl() {
+ // Rustc parses all of the following.
+
+ #[cfg(any())]
+ impl ! {}
+ let tokens = quote! {
+ impl ! {}
+ };
+ snapshot!(tokens as Item, @r###"
+ Item::Impl {
+ generics: Generics,
+ self_ty: Type::Never,
+ }
+ "###);
+
+ #[cfg(any())]
+ #[rustfmt::skip]
+ impl !Trait {}
+ let tokens = quote! {
+ impl !Trait {}
+ };
+ snapshot!(tokens as Item, @r###"
+ Item::Impl {
+ generics: Generics,
+ self_ty: Verbatim(`! Trait`),
+ }
+ "###);
+
+ #[cfg(any())]
+ impl !Trait for T {}
+ let tokens = quote! {
+ impl !Trait for T {}
+ };
+ snapshot!(tokens as Item, @r###"
+ Item::Impl {
+ generics: Generics,
+ trait_: Some((
+ Some,
+ Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ arguments: None,
+ },
+ ],
+ },
+ )),
+ self_ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ }
+ "###);
+
+ #[cfg(any())]
+ #[rustfmt::skip]
+ impl !! {}
+ let tokens = quote! {
+ impl !! {}
+ };
+ snapshot!(tokens as Item, @r###"
+ Item::Impl {
+ generics: Generics,
+ self_ty: Verbatim(`! !`),
+ }
+ "###);
+}
+
+#[test]
+fn test_macro_variable_impl() {
+ // mimics the token stream corresponding to `impl $trait for $ty {}`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Ident(Ident::new("impl", Span::call_site())),
+ TokenTree::Group(Group::new(Delimiter::None, quote!(Trait))),
+ TokenTree::Ident(Ident::new("for", Span::call_site())),
+ TokenTree::Group(Group::new(Delimiter::None, quote!(Type))),
+ TokenTree::Group(Group::new(Delimiter::Brace, TokenStream::new())),
+ ]);
+
+ snapshot!(tokens as Item, @r###"
+ Item::Impl {
+ generics: Generics,
+ trait_: Some((
+ None,
+ Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ arguments: None,
+ },
+ ],
+ },
+ )),
+ self_ty: Type::Group {
+ elem: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Type",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_supertraits() {
+ // Rustc parses all of the following.
+
+ #[rustfmt::skip]
+ let tokens = quote!(trait Trait where {});
+ snapshot!(tokens as ItemTrait, @r###"
+ ItemTrait {
+ vis: Inherited,
+ ident: "Trait",
+ generics: Generics {
+ where_clause: Some(WhereClause),
+ },
+ }
+ "###);
+
+ #[rustfmt::skip]
+ let tokens = quote!(trait Trait: where {});
+ snapshot!(tokens as ItemTrait, @r###"
+ ItemTrait {
+ vis: Inherited,
+ ident: "Trait",
+ generics: Generics {
+ where_clause: Some(WhereClause),
+ },
+ colon_token: Some,
+ }
+ "###);
+
+ #[rustfmt::skip]
+ let tokens = quote!(trait Trait: Sized where {});
+ snapshot!(tokens as ItemTrait, @r###"
+ ItemTrait {
+ vis: Inherited,
+ ident: "Trait",
+ generics: Generics {
+ where_clause: Some(WhereClause),
+ },
+ colon_token: Some,
+ supertraits: [
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Sized",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ }
+ "###);
+
+ #[rustfmt::skip]
+ let tokens = quote!(trait Trait: Sized + where {});
+ snapshot!(tokens as ItemTrait, @r###"
+ ItemTrait {
+ vis: Inherited,
+ ident: "Trait",
+ generics: Generics {
+ where_clause: Some(WhereClause),
+ },
+ colon_token: Some,
+ supertraits: [
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Sized",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_type_empty_bounds() {
+ #[rustfmt::skip]
+ let tokens = quote! {
+ trait Foo {
+ type Bar: ;
+ }
+ };
+
+ snapshot!(tokens as ItemTrait, @r###"
+ ItemTrait {
+ vis: Inherited,
+ ident: "Foo",
+ generics: Generics,
+ items: [
+ TraitItem::Type {
+ ident: "Bar",
+ generics: Generics,
+ colon_token: Some,
+ },
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_impl_visibility() {
+ let tokens = quote! {
+ pub default unsafe impl union {}
+ };
+
+ snapshot!(tokens as Item, @"Verbatim(`pub default unsafe impl union { }`)");
+}
+
+#[test]
+fn test_impl_type_parameter_defaults() {
+ #[cfg(any())]
+ impl<T = ()> () {}
+ let tokens = quote! {
+ impl<T = ()> () {}
+ };
+ snapshot!(tokens as Item, @r###"
+ Item::Impl {
+ generics: Generics {
+ lt_token: Some,
+ params: [
+ Type(TypeParam {
+ ident: "T",
+ eq_token: Some,
+ default: Some(Type::Tuple),
+ }),
+ ],
+ gt_token: Some,
+ },
+ self_ty: Type::Tuple,
+ }"###);
+}
+
+#[test]
+fn test_impl_trait_trailing_plus() {
+ let tokens = quote! {
+ fn f() -> impl Sized + {}
+ };
+
+ snapshot!(tokens as Item, @r###"
+ Item::Fn {
+ vis: Inherited,
+ sig: Signature {
+ ident: "f",
+ generics: Generics,
+ output: Type(
+ Type::ImplTrait {
+ bounds: [
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Sized",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ ),
+ },
+ block: Block,
+ }
+ "###);
+}
diff --git a/third_party/rust/syn/tests/test_iterators.rs b/third_party/rust/syn/tests/test_iterators.rs
new file mode 100644
index 0000000000..0ab0fb9147
--- /dev/null
+++ b/third_party/rust/syn/tests/test_iterators.rs
@@ -0,0 +1,68 @@
+use syn::punctuated::{Pair, Punctuated};
+use syn::Token;
+
+#[macro_use]
+mod macros;
+
+macro_rules! check_exact_size_iterator {
+ ($iter:expr) => {{
+ let iter = $iter;
+ let size_hint = iter.size_hint();
+ let len = iter.len();
+ let count = iter.count();
+ assert_eq!(len, count);
+ assert_eq!(size_hint, (count, Some(count)));
+ }};
+}
+
+#[test]
+fn pairs() {
+ let mut p: Punctuated<_, Token![,]> = punctuated!(2, 3, 4);
+
+ check_exact_size_iterator!(p.pairs());
+ check_exact_size_iterator!(p.pairs_mut());
+ check_exact_size_iterator!(p.into_pairs());
+
+ let mut p: Punctuated<_, Token![,]> = punctuated!(2, 3, 4);
+
+ assert_eq!(p.pairs().next_back().map(Pair::into_value), Some(&4));
+ assert_eq!(
+ p.pairs_mut().next_back().map(Pair::into_value),
+ Some(&mut 4)
+ );
+ assert_eq!(p.into_pairs().next_back().map(Pair::into_value), Some(4));
+}
+
+#[test]
+fn iter() {
+ let mut p: Punctuated<_, Token![,]> = punctuated!(2, 3, 4);
+
+ check_exact_size_iterator!(p.iter());
+ check_exact_size_iterator!(p.iter_mut());
+ check_exact_size_iterator!(p.into_iter());
+
+ let mut p: Punctuated<_, Token![,]> = punctuated!(2, 3, 4);
+
+ assert_eq!(p.iter().next_back(), Some(&4));
+ assert_eq!(p.iter_mut().next_back(), Some(&mut 4));
+ assert_eq!(p.into_iter().next_back(), Some(4));
+}
+
+#[test]
+fn may_dangle() {
+ let p: Punctuated<_, Token![,]> = punctuated!(2, 3, 4);
+ for element in &p {
+ if *element == 2 {
+ drop(p);
+ break;
+ }
+ }
+
+ let mut p: Punctuated<_, Token![,]> = punctuated!(2, 3, 4);
+ for element in &mut p {
+ if *element == 2 {
+ drop(p);
+ break;
+ }
+ }
+}
diff --git a/third_party/rust/syn/tests/test_lit.rs b/third_party/rust/syn/tests/test_lit.rs
new file mode 100644
index 0000000000..ebe077c617
--- /dev/null
+++ b/third_party/rust/syn/tests/test_lit.rs
@@ -0,0 +1,266 @@
+#![allow(clippy::float_cmp, clippy::non_ascii_literal)]
+
+#[macro_use]
+mod macros;
+
+use proc_macro2::{Delimiter, Group, Literal, Span, TokenStream, TokenTree};
+use quote::ToTokens;
+use std::iter::FromIterator;
+use std::str::FromStr;
+use syn::{Lit, LitFloat, LitInt, LitStr};
+
+fn lit(s: &str) -> Lit {
+ match TokenStream::from_str(s)
+ .unwrap()
+ .into_iter()
+ .next()
+ .unwrap()
+ {
+ TokenTree::Literal(lit) => Lit::new(lit),
+ _ => panic!(),
+ }
+}
+
+#[test]
+fn strings() {
+ fn test_string(s: &str, value: &str) {
+ match lit(s) {
+ Lit::Str(lit) => {
+ assert_eq!(lit.value(), value);
+ let again = lit.into_token_stream().to_string();
+ if again != s {
+ test_string(&again, value);
+ }
+ }
+ wrong => panic!("{:?}", wrong),
+ }
+ }
+
+ test_string("\"a\"", "a");
+ test_string("\"\\n\"", "\n");
+ test_string("\"\\r\"", "\r");
+ test_string("\"\\t\"", "\t");
+ test_string("\"🐕\"", "🐕"); // NOTE: This is an emoji
+ test_string("\"\\\"\"", "\"");
+ test_string("\"'\"", "'");
+ test_string("\"\"", "");
+ test_string("\"\\u{1F415}\"", "\u{1F415}");
+ test_string("\"\\u{1_2__3_}\"", "\u{123}");
+ test_string(
+ "\"contains\nnewlines\\\nescaped newlines\"",
+ "contains\nnewlinesescaped newlines",
+ );
+ test_string("r\"raw\nstring\\\nhere\"", "raw\nstring\\\nhere");
+ test_string("\"...\"q", "...");
+ test_string("r\"...\"q", "...");
+ test_string("r##\"...\"##q", "...");
+}
+
+#[test]
+fn byte_strings() {
+ fn test_byte_string(s: &str, value: &[u8]) {
+ match lit(s) {
+ Lit::ByteStr(lit) => {
+ assert_eq!(lit.value(), value);
+ let again = lit.into_token_stream().to_string();
+ if again != s {
+ test_byte_string(&again, value);
+ }
+ }
+ wrong => panic!("{:?}", wrong),
+ }
+ }
+
+ test_byte_string("b\"a\"", b"a");
+ test_byte_string("b\"\\n\"", b"\n");
+ test_byte_string("b\"\\r\"", b"\r");
+ test_byte_string("b\"\\t\"", b"\t");
+ test_byte_string("b\"\\\"\"", b"\"");
+ test_byte_string("b\"'\"", b"'");
+ test_byte_string("b\"\"", b"");
+ test_byte_string(
+ "b\"contains\nnewlines\\\nescaped newlines\"",
+ b"contains\nnewlinesescaped newlines",
+ );
+ test_byte_string("br\"raw\nstring\\\nhere\"", b"raw\nstring\\\nhere");
+ test_byte_string("b\"...\"q", b"...");
+ test_byte_string("br\"...\"q", b"...");
+ test_byte_string("br##\"...\"##q", b"...");
+}
+
+#[test]
+fn bytes() {
+ fn test_byte(s: &str, value: u8) {
+ match lit(s) {
+ Lit::Byte(lit) => {
+ assert_eq!(lit.value(), value);
+ let again = lit.into_token_stream().to_string();
+ assert_eq!(again, s);
+ }
+ wrong => panic!("{:?}", wrong),
+ }
+ }
+
+ test_byte("b'a'", b'a');
+ test_byte("b'\\n'", b'\n');
+ test_byte("b'\\r'", b'\r');
+ test_byte("b'\\t'", b'\t');
+ test_byte("b'\\''", b'\'');
+ test_byte("b'\"'", b'"');
+ test_byte("b'a'q", b'a');
+}
+
+#[test]
+fn chars() {
+ fn test_char(s: &str, value: char) {
+ match lit(s) {
+ Lit::Char(lit) => {
+ assert_eq!(lit.value(), value);
+ let again = lit.into_token_stream().to_string();
+ if again != s {
+ test_char(&again, value);
+ }
+ }
+ wrong => panic!("{:?}", wrong),
+ }
+ }
+
+ test_char("'a'", 'a');
+ test_char("'\\n'", '\n');
+ test_char("'\\r'", '\r');
+ test_char("'\\t'", '\t');
+ test_char("'🐕'", '🐕'); // NOTE: This is an emoji
+ test_char("'\\''", '\'');
+ test_char("'\"'", '"');
+ test_char("'\\u{1F415}'", '\u{1F415}');
+ test_char("'a'q", 'a');
+}
+
+#[test]
+fn ints() {
+ fn test_int(s: &str, value: u64, suffix: &str) {
+ match lit(s) {
+ Lit::Int(lit) => {
+ assert_eq!(lit.base10_digits().parse::<u64>().unwrap(), value);
+ assert_eq!(lit.suffix(), suffix);
+ let again = lit.into_token_stream().to_string();
+ if again != s {
+ test_int(&again, value, suffix);
+ }
+ }
+ wrong => panic!("{:?}", wrong),
+ }
+ }
+
+ test_int("5", 5, "");
+ test_int("5u32", 5, "u32");
+ test_int("0E", 0, "E");
+ test_int("0ECMA", 0, "ECMA");
+ test_int("0o0A", 0, "A");
+ test_int("5_0", 50, "");
+ test_int("5_____0_____", 50, "");
+ test_int("0x7f", 127, "");
+ test_int("0x7F", 127, "");
+ test_int("0b1001", 9, "");
+ test_int("0o73", 59, "");
+ test_int("0x7Fu8", 127, "u8");
+ test_int("0b1001i8", 9, "i8");
+ test_int("0o73u32", 59, "u32");
+ test_int("0x__7___f_", 127, "");
+ test_int("0x__7___F_", 127, "");
+ test_int("0b_1_0__01", 9, "");
+ test_int("0o_7__3", 59, "");
+ test_int("0x_7F__u8", 127, "u8");
+ test_int("0b__10__0_1i8", 9, "i8");
+ test_int("0o__7__________________3u32", 59, "u32");
+ test_int("0e1\u{5c5}", 0, "e1\u{5c5}");
+}
+
+#[test]
+fn floats() {
+ fn test_float(s: &str, value: f64, suffix: &str) {
+ match lit(s) {
+ Lit::Float(lit) => {
+ assert_eq!(lit.base10_digits().parse::<f64>().unwrap(), value);
+ assert_eq!(lit.suffix(), suffix);
+ let again = lit.into_token_stream().to_string();
+ if again != s {
+ test_float(&again, value, suffix);
+ }
+ }
+ wrong => panic!("{:?}", wrong),
+ }
+ }
+
+ test_float("5.5", 5.5, "");
+ test_float("5.5E12", 5.5e12, "");
+ test_float("5.5e12", 5.5e12, "");
+ test_float("1.0__3e-12", 1.03e-12, "");
+ test_float("1.03e+12", 1.03e12, "");
+ test_float("9e99e99", 9e99, "e99");
+ test_float("1e_0", 1.0, "");
+ test_float("0.0ECMA", 0.0, "ECMA");
+}
+
+#[test]
+fn negative() {
+ let span = Span::call_site();
+ assert_eq!("-1", LitInt::new("-1", span).to_string());
+ assert_eq!("-1i8", LitInt::new("-1i8", span).to_string());
+ assert_eq!("-1i16", LitInt::new("-1i16", span).to_string());
+ assert_eq!("-1i32", LitInt::new("-1i32", span).to_string());
+ assert_eq!("-1i64", LitInt::new("-1i64", span).to_string());
+ assert_eq!("-1.5", LitFloat::new("-1.5", span).to_string());
+ assert_eq!("-1.5f32", LitFloat::new("-1.5f32", span).to_string());
+ assert_eq!("-1.5f64", LitFloat::new("-1.5f64", span).to_string());
+}
+
+#[test]
+fn suffix() {
+ fn get_suffix(token: &str) -> String {
+ let lit = syn::parse_str::<Lit>(token).unwrap();
+ match lit {
+ Lit::Str(lit) => lit.suffix().to_owned(),
+ Lit::ByteStr(lit) => lit.suffix().to_owned(),
+ Lit::Byte(lit) => lit.suffix().to_owned(),
+ Lit::Char(lit) => lit.suffix().to_owned(),
+ Lit::Int(lit) => lit.suffix().to_owned(),
+ Lit::Float(lit) => lit.suffix().to_owned(),
+ _ => unimplemented!(),
+ }
+ }
+
+ assert_eq!(get_suffix("\"\"s"), "s");
+ assert_eq!(get_suffix("r\"\"r"), "r");
+ assert_eq!(get_suffix("b\"\"b"), "b");
+ assert_eq!(get_suffix("br\"\"br"), "br");
+ assert_eq!(get_suffix("r#\"\"#r"), "r");
+ assert_eq!(get_suffix("'c'c"), "c");
+ assert_eq!(get_suffix("b'b'b"), "b");
+ assert_eq!(get_suffix("1i32"), "i32");
+ assert_eq!(get_suffix("1_i32"), "i32");
+ assert_eq!(get_suffix("1.0f32"), "f32");
+ assert_eq!(get_suffix("1.0_f32"), "f32");
+}
+
+#[test]
+fn test_deep_group_empty() {
+ let tokens = TokenStream::from_iter(vec![TokenTree::Group(Group::new(
+ Delimiter::None,
+ TokenStream::from_iter(vec![TokenTree::Group(Group::new(
+ Delimiter::None,
+ TokenStream::from_iter(vec![TokenTree::Literal(Literal::string("hi"))]),
+ ))]),
+ ))]);
+
+ snapshot!(tokens as Lit, @r#""hi""# );
+}
+
+#[test]
+fn test_error() {
+ let err = syn::parse_str::<LitStr>("...").unwrap_err();
+ assert_eq!("expected string literal", err.to_string());
+
+ let err = syn::parse_str::<LitStr>("5").unwrap_err();
+ assert_eq!("expected string literal", err.to_string());
+}
diff --git a/third_party/rust/syn/tests/test_meta.rs b/third_party/rust/syn/tests/test_meta.rs
new file mode 100644
index 0000000000..9b3f30deeb
--- /dev/null
+++ b/third_party/rust/syn/tests/test_meta.rs
@@ -0,0 +1,378 @@
+#![allow(clippy::shadow_unrelated, clippy::too_many_lines)]
+
+#[macro_use]
+mod macros;
+
+use syn::{Meta, MetaList, MetaNameValue, NestedMeta};
+
+#[test]
+fn test_parse_meta_item_word() {
+ let input = "hello";
+
+ snapshot!(input as Meta, @r###"
+ Path(Path {
+ segments: [
+ PathSegment {
+ ident: "hello",
+ arguments: None,
+ },
+ ],
+ })
+ "###);
+}
+
+#[test]
+fn test_parse_meta_name_value() {
+ let input = "foo = 5";
+ let (inner, meta) = (input, input);
+
+ snapshot!(inner as MetaNameValue, @r###"
+ MetaNameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }
+ "###);
+
+ snapshot!(meta as Meta, @r###"
+ Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }
+ "###);
+
+ assert_eq!(meta, inner.into());
+}
+
+#[test]
+fn test_parse_meta_name_value_with_keyword() {
+ let input = "static = 5";
+ let (inner, meta) = (input, input);
+
+ snapshot!(inner as MetaNameValue, @r###"
+ MetaNameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "static",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }
+ "###);
+
+ snapshot!(meta as Meta, @r###"
+ Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "static",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }
+ "###);
+
+ assert_eq!(meta, inner.into());
+}
+
+#[test]
+fn test_parse_meta_name_value_with_bool() {
+ let input = "true = 5";
+ let (inner, meta) = (input, input);
+
+ snapshot!(inner as MetaNameValue, @r###"
+ MetaNameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "true",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }
+ "###);
+
+ snapshot!(meta as Meta, @r###"
+ Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "true",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }
+ "###);
+
+ assert_eq!(meta, inner.into());
+}
+
+#[test]
+fn test_parse_meta_item_list_lit() {
+ let input = "foo(5)";
+ let (inner, meta) = (input, input);
+
+ snapshot!(inner as MetaList, @r###"
+ MetaList {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Lit(5),
+ ],
+ }
+ "###);
+
+ snapshot!(meta as Meta, @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Lit(5),
+ ],
+ }
+ "###);
+
+ assert_eq!(meta, inner.into());
+}
+
+#[test]
+fn test_parse_meta_item_multiple() {
+ let input = "foo(word, name = 5, list(name2 = 6), word2)";
+ let (inner, meta) = (input, input);
+
+ snapshot!(inner as MetaList, @r###"
+ MetaList {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Path(Path {
+ segments: [
+ PathSegment {
+ ident: "word",
+ arguments: None,
+ },
+ ],
+ })),
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "name",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }),
+ Meta(Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "list",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "name2",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 6,
+ }),
+ ],
+ }),
+ Meta(Path(Path {
+ segments: [
+ PathSegment {
+ ident: "word2",
+ arguments: None,
+ },
+ ],
+ })),
+ ],
+ }
+ "###);
+
+ snapshot!(meta as Meta, @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Path(Path {
+ segments: [
+ PathSegment {
+ ident: "word",
+ arguments: None,
+ },
+ ],
+ })),
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "name",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 5,
+ }),
+ Meta(Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "list",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "name2",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 6,
+ }),
+ ],
+ }),
+ Meta(Path(Path {
+ segments: [
+ PathSegment {
+ ident: "word2",
+ arguments: None,
+ },
+ ],
+ })),
+ ],
+ }
+ "###);
+
+ assert_eq!(meta, inner.into());
+}
+
+#[test]
+fn test_parse_nested_meta() {
+ let input = "5";
+ snapshot!(input as NestedMeta, @"Lit(5)");
+
+ let input = "list(name2 = 6)";
+ snapshot!(input as NestedMeta, @r###"
+ Meta(Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "list",
+ arguments: None,
+ },
+ ],
+ },
+ nested: [
+ Meta(Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "name2",
+ arguments: None,
+ },
+ ],
+ },
+ lit: 6,
+ }),
+ ],
+ })
+ "###);
+}
+
+#[test]
+fn test_parse_path() {
+ let input = "::serde::Serialize";
+ snapshot!(input as Meta, @r###"
+ Path(Path {
+ leading_colon: Some,
+ segments: [
+ PathSegment {
+ ident: "serde",
+ arguments: None,
+ },
+ PathSegment {
+ ident: "Serialize",
+ arguments: None,
+ },
+ ],
+ })
+ "###);
+
+ let input = "::serde::Serialize";
+ snapshot!(input as NestedMeta, @r###"
+ Meta(Path(Path {
+ leading_colon: Some,
+ segments: [
+ PathSegment {
+ ident: "serde",
+ arguments: None,
+ },
+ PathSegment {
+ ident: "Serialize",
+ arguments: None,
+ },
+ ],
+ }))
+ "###);
+}
diff --git a/third_party/rust/syn/tests/test_parse_buffer.rs b/third_party/rust/syn/tests/test_parse_buffer.rs
new file mode 100644
index 0000000000..cc23e9ba6c
--- /dev/null
+++ b/third_party/rust/syn/tests/test_parse_buffer.rs
@@ -0,0 +1,92 @@
+#![allow(clippy::non_ascii_literal)]
+
+use proc_macro2::{Delimiter, Group, Punct, Spacing, TokenStream, TokenTree};
+use std::iter::FromIterator;
+use syn::parse::{discouraged::Speculative, Parse, ParseStream, Parser, Result};
+use syn::{parenthesized, Token};
+
+#[test]
+#[should_panic(expected = "Fork was not derived from the advancing parse stream")]
+fn smuggled_speculative_cursor_between_sources() {
+ struct BreakRules;
+ impl Parse for BreakRules {
+ fn parse(input1: ParseStream) -> Result<Self> {
+ let nested = |input2: ParseStream| {
+ input1.advance_to(input2);
+ Ok(Self)
+ };
+ nested.parse_str("")
+ }
+ }
+
+ syn::parse_str::<BreakRules>("").unwrap();
+}
+
+#[test]
+#[should_panic(expected = "Fork was not derived from the advancing parse stream")]
+fn smuggled_speculative_cursor_between_brackets() {
+ struct BreakRules;
+ impl Parse for BreakRules {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let a;
+ let b;
+ parenthesized!(a in input);
+ parenthesized!(b in input);
+ a.advance_to(&b);
+ Ok(Self)
+ }
+ }
+
+ syn::parse_str::<BreakRules>("()()").unwrap();
+}
+
+#[test]
+#[should_panic(expected = "Fork was not derived from the advancing parse stream")]
+fn smuggled_speculative_cursor_into_brackets() {
+ struct BreakRules;
+ impl Parse for BreakRules {
+ fn parse(input: ParseStream) -> Result<Self> {
+ let a;
+ parenthesized!(a in input);
+ input.advance_to(&a);
+ Ok(Self)
+ }
+ }
+
+ syn::parse_str::<BreakRules>("()").unwrap();
+}
+
+#[test]
+fn trailing_empty_none_group() {
+ fn parse(input: ParseStream) -> Result<()> {
+ input.parse::<Token![+]>()?;
+
+ let content;
+ parenthesized!(content in input);
+ content.parse::<Token![+]>()?;
+
+ Ok(())
+ }
+
+ // `+ ( + <Ø Ø> ) <Ø <Ø Ø> Ø>`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Punct(Punct::new('+', Spacing::Alone)),
+ TokenTree::Group(Group::new(
+ Delimiter::Parenthesis,
+ TokenStream::from_iter(vec![
+ TokenTree::Punct(Punct::new('+', Spacing::Alone)),
+ TokenTree::Group(Group::new(Delimiter::None, TokenStream::new())),
+ ]),
+ )),
+ TokenTree::Group(Group::new(Delimiter::None, TokenStream::new())),
+ TokenTree::Group(Group::new(
+ Delimiter::None,
+ TokenStream::from_iter(vec![TokenTree::Group(Group::new(
+ Delimiter::None,
+ TokenStream::new(),
+ ))]),
+ )),
+ ]);
+
+ parse.parse2(tokens).unwrap();
+}
diff --git a/third_party/rust/syn/tests/test_parse_stream.rs b/third_party/rust/syn/tests/test_parse_stream.rs
new file mode 100644
index 0000000000..cc14fa032e
--- /dev/null
+++ b/third_party/rust/syn/tests/test_parse_stream.rs
@@ -0,0 +1,12 @@
+use syn::ext::IdentExt;
+use syn::parse::ParseStream;
+use syn::{Ident, Token};
+
+#[test]
+fn test_peek() {
+ _ = |input: ParseStream| {
+ _ = input.peek(Ident);
+ _ = input.peek(Ident::peek_any);
+ _ = input.peek(Token![::]);
+ };
+}
diff --git a/third_party/rust/syn/tests/test_pat.rs b/third_party/rust/syn/tests/test_pat.rs
new file mode 100644
index 0000000000..695e4736ee
--- /dev/null
+++ b/third_party/rust/syn/tests/test_pat.rs
@@ -0,0 +1,67 @@
+#[macro_use]
+mod macros;
+
+use proc_macro2::{Delimiter, Group, TokenStream, TokenTree};
+use quote::quote;
+use std::iter::FromIterator;
+use syn::{Item, Pat, Stmt};
+
+#[test]
+fn test_pat_ident() {
+ match syn::parse2(quote!(self)).unwrap() {
+ Pat::Ident(_) => (),
+ value => panic!("expected PatIdent, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_pat_path() {
+ match syn::parse2(quote!(self::CONST)).unwrap() {
+ Pat::Path(_) => (),
+ value => panic!("expected PatPath, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_leading_vert() {
+ // https://github.com/rust-lang/rust/blob/1.43.0/src/test/ui/or-patterns/remove-leading-vert.rs
+
+ syn::parse_str::<Item>("fn f() {}").unwrap();
+ syn::parse_str::<Item>("fn fun1(| A: E) {}").unwrap_err();
+ syn::parse_str::<Item>("fn fun2(|| A: E) {}").unwrap_err();
+
+ syn::parse_str::<Stmt>("let | () = ();").unwrap();
+ syn::parse_str::<Stmt>("let (| A): E;").unwrap();
+ syn::parse_str::<Stmt>("let (|| A): (E);").unwrap_err();
+ syn::parse_str::<Stmt>("let (| A,): (E,);").unwrap();
+ syn::parse_str::<Stmt>("let [| A]: [E; 1];").unwrap();
+ syn::parse_str::<Stmt>("let [|| A]: [E; 1];").unwrap_err();
+ syn::parse_str::<Stmt>("let TS(| A): TS;").unwrap();
+ syn::parse_str::<Stmt>("let TS(|| A): TS;").unwrap_err();
+ syn::parse_str::<Stmt>("let NS { f: | A }: NS;").unwrap();
+ syn::parse_str::<Stmt>("let NS { f: || A }: NS;").unwrap_err();
+}
+
+#[test]
+fn test_group() {
+ let group = Group::new(Delimiter::None, quote!(Some(_)));
+ let tokens = TokenStream::from_iter(vec![TokenTree::Group(group)]);
+
+ snapshot!(tokens as Pat, @r###"
+ Pat::TupleStruct {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Some",
+ arguments: None,
+ },
+ ],
+ },
+ pat: PatTuple {
+ elems: [
+ Pat::Wild,
+ ],
+ },
+ }
+ "###);
+}
diff --git a/third_party/rust/syn/tests/test_path.rs b/third_party/rust/syn/tests/test_path.rs
new file mode 100644
index 0000000000..c732eff70c
--- /dev/null
+++ b/third_party/rust/syn/tests/test_path.rs
@@ -0,0 +1,126 @@
+#[macro_use]
+mod macros;
+
+use proc_macro2::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree};
+use quote::{quote, ToTokens};
+use std::iter::FromIterator;
+use syn::{parse_quote, Expr, Type, TypePath};
+
+#[test]
+fn parse_interpolated_leading_component() {
+ // mimics the token stream corresponding to `$mod::rest`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { first })),
+ TokenTree::Punct(Punct::new(':', Spacing::Joint)),
+ TokenTree::Punct(Punct::new(':', Spacing::Alone)),
+ TokenTree::Ident(Ident::new("rest", Span::call_site())),
+ ]);
+
+ snapshot!(tokens.clone() as Expr, @r###"
+ Expr::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "first",
+ arguments: None,
+ },
+ PathSegment {
+ ident: "rest",
+ arguments: None,
+ },
+ ],
+ },
+ }
+ "###);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "first",
+ arguments: None,
+ },
+ PathSegment {
+ ident: "rest",
+ arguments: None,
+ },
+ ],
+ },
+ }
+ "###);
+}
+
+#[test]
+fn print_incomplete_qpath() {
+ // qpath with `as` token
+ let mut ty: TypePath = parse_quote!(<Self as A>::Q);
+ snapshot!(ty.to_token_stream(), @r###"
+ TokenStream(`< Self as A > :: Q`)
+ "###);
+ assert!(ty.path.segments.pop().is_some());
+ snapshot!(ty.to_token_stream(), @r###"
+ TokenStream(`< Self as A > ::`)
+ "###);
+ assert!(ty.path.segments.pop().is_some());
+ snapshot!(ty.to_token_stream(), @r###"
+ TokenStream(`< Self >`)
+ "###);
+ assert!(ty.path.segments.pop().is_none());
+
+ // qpath without `as` token
+ let mut ty: TypePath = parse_quote!(<Self>::A::B);
+ snapshot!(ty.to_token_stream(), @r###"
+ TokenStream(`< Self > :: A :: B`)
+ "###);
+ assert!(ty.path.segments.pop().is_some());
+ snapshot!(ty.to_token_stream(), @r###"
+ TokenStream(`< Self > :: A ::`)
+ "###);
+ assert!(ty.path.segments.pop().is_some());
+ snapshot!(ty.to_token_stream(), @r###"
+ TokenStream(`< Self > ::`)
+ "###);
+ assert!(ty.path.segments.pop().is_none());
+
+ // normal path
+ let mut ty: TypePath = parse_quote!(Self::A::B);
+ snapshot!(ty.to_token_stream(), @r###"
+ TokenStream(`Self :: A :: B`)
+ "###);
+ assert!(ty.path.segments.pop().is_some());
+ snapshot!(ty.to_token_stream(), @r###"
+ TokenStream(`Self :: A ::`)
+ "###);
+ assert!(ty.path.segments.pop().is_some());
+ snapshot!(ty.to_token_stream(), @r###"
+ TokenStream(`Self ::`)
+ "###);
+ assert!(ty.path.segments.pop().is_some());
+ snapshot!(ty.to_token_stream(), @r###"
+ TokenStream(``)
+ "###);
+ assert!(ty.path.segments.pop().is_none());
+}
+
+#[test]
+fn parse_parenthesized_path_arguments_with_disambiguator() {
+ #[rustfmt::skip]
+ let tokens = quote!(FnOnce::() -> !);
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "FnOnce",
+ arguments: PathArguments::Parenthesized {
+ output: Type(
+ Type::Never,
+ ),
+ },
+ },
+ ],
+ },
+ }
+ "###);
+}
diff --git a/third_party/rust/syn/tests/test_precedence.rs b/third_party/rust/syn/tests/test_precedence.rs
new file mode 100644
index 0000000000..dbcd74f163
--- /dev/null
+++ b/third_party/rust/syn/tests/test_precedence.rs
@@ -0,0 +1,460 @@
+#![cfg(not(syn_disable_nightly_tests))]
+#![cfg(not(miri))]
+#![recursion_limit = "1024"]
+#![feature(rustc_private)]
+#![allow(
+ clippy::explicit_deref_methods,
+ clippy::manual_assert,
+ clippy::match_wildcard_for_single_variants,
+ clippy::too_many_lines
+)]
+
+//! The tests in this module do the following:
+//!
+//! 1. Parse a given expression in both `syn` and `librustc`.
+//! 2. Fold over the expression adding brackets around each subexpression (with
+//! some complications - see the `syn_brackets` and `librustc_brackets`
+//! methods).
+//! 3. Serialize the `syn` expression back into a string, and re-parse it with
+//! `librustc`.
+//! 4. Respan all of the expressions, replacing the spans with the default
+//! spans.
+//! 5. Compare the expressions with one another, if they are not equal fail.
+
+extern crate rustc_ast;
+extern crate rustc_data_structures;
+extern crate rustc_span;
+extern crate thin_vec;
+
+use crate::common::eq::SpanlessEq;
+use crate::common::parse;
+use quote::quote;
+use rayon::iter::{IntoParallelIterator, ParallelIterator};
+use regex::Regex;
+use rustc_ast::ast;
+use rustc_ast::ptr::P;
+use rustc_span::edition::Edition;
+use std::fs;
+use std::process;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use walkdir::{DirEntry, WalkDir};
+
+#[macro_use]
+mod macros;
+
+#[allow(dead_code)]
+mod common;
+
+mod repo;
+
+/// Test some pre-set expressions chosen by us.
+#[test]
+fn test_simple_precedence() {
+ const EXPRS: &[&str] = &[
+ "1 + 2 * 3 + 4",
+ "1 + 2 * ( 3 + 4 )",
+ "{ for i in r { } *some_ptr += 1; }",
+ "{ loop { break 5; } }",
+ "{ if true { () }.mthd() }",
+ "{ for i in unsafe { 20 } { } }",
+ ];
+
+ let mut failed = 0;
+
+ for input in EXPRS {
+ let expr = if let Some(expr) = parse::syn_expr(input) {
+ expr
+ } else {
+ failed += 1;
+ continue;
+ };
+
+ let pf = match test_expressions(Edition::Edition2018, vec![expr]) {
+ (1, 0) => "passed",
+ (0, 1) => {
+ failed += 1;
+ "failed"
+ }
+ _ => unreachable!(),
+ };
+ errorf!("=== {}: {}\n", input, pf);
+ }
+
+ if failed > 0 {
+ panic!("Failed {} tests", failed);
+ }
+}
+
+/// Test expressions from rustc, like in `test_round_trip`.
+#[test]
+fn test_rustc_precedence() {
+ common::rayon_init();
+ repo::clone_rust();
+ let abort_after = common::abort_after();
+ if abort_after == 0 {
+ panic!("Skipping all precedence tests");
+ }
+
+ let passed = AtomicUsize::new(0);
+ let failed = AtomicUsize::new(0);
+
+ // 2018 edition is hard
+ let edition_regex = Regex::new(r"\b(async|try)[!(]").unwrap();
+
+ WalkDir::new("tests/rust")
+ .sort_by(|a, b| a.file_name().cmp(b.file_name()))
+ .into_iter()
+ .filter_entry(repo::base_dir_filter)
+ .collect::<Result<Vec<DirEntry>, walkdir::Error>>()
+ .unwrap()
+ .into_par_iter()
+ .for_each(|entry| {
+ let path = entry.path();
+ if path.is_dir() {
+ return;
+ }
+
+ let content = fs::read_to_string(path).unwrap();
+ let content = edition_regex.replace_all(&content, "_$0");
+
+ let (l_passed, l_failed) = match syn::parse_file(&content) {
+ Ok(file) => {
+ let edition = repo::edition(path).parse().unwrap();
+ let exprs = collect_exprs(file);
+ test_expressions(edition, exprs)
+ }
+ Err(msg) => {
+ errorf!("syn failed to parse\n{:?}\n", msg);
+ (0, 1)
+ }
+ };
+
+ errorf!(
+ "=== {}: {} passed | {} failed\n",
+ path.display(),
+ l_passed,
+ l_failed
+ );
+
+ passed.fetch_add(l_passed, Ordering::Relaxed);
+ let prev_failed = failed.fetch_add(l_failed, Ordering::Relaxed);
+
+ if prev_failed + l_failed >= abort_after {
+ process::exit(1);
+ }
+ });
+
+ let passed = passed.load(Ordering::Relaxed);
+ let failed = failed.load(Ordering::Relaxed);
+
+ errorf!("\n===== Precedence Test Results =====\n");
+ errorf!("{} passed | {} failed\n", passed, failed);
+
+ if failed > 0 {
+ panic!("{} failures", failed);
+ }
+}
+
+fn test_expressions(edition: Edition, exprs: Vec<syn::Expr>) -> (usize, usize) {
+ let mut passed = 0;
+ let mut failed = 0;
+
+ rustc_span::create_session_if_not_set_then(edition, |_| {
+ for expr in exprs {
+ let raw = quote!(#expr).to_string();
+
+ let librustc_ast = if let Some(e) = librustc_parse_and_rewrite(&raw) {
+ e
+ } else {
+ failed += 1;
+ errorf!("\nFAIL - librustc failed to parse raw\n");
+ continue;
+ };
+
+ let syn_expr = syn_brackets(expr);
+ let syn_ast = if let Some(e) = parse::librustc_expr(&quote!(#syn_expr).to_string()) {
+ e
+ } else {
+ failed += 1;
+ errorf!("\nFAIL - librustc failed to parse bracketed\n");
+ continue;
+ };
+
+ if SpanlessEq::eq(&syn_ast, &librustc_ast) {
+ passed += 1;
+ } else {
+ failed += 1;
+ errorf!("\nFAIL\n{:?}\n!=\n{:?}\n", syn_ast, librustc_ast);
+ }
+ }
+ });
+
+ (passed, failed)
+}
+
+fn librustc_parse_and_rewrite(input: &str) -> Option<P<ast::Expr>> {
+ parse::librustc_expr(input).and_then(librustc_brackets)
+}
+
+/// Wrap every expression which is not already wrapped in parens with parens, to
+/// reveal the precedence of the parsed expressions, and produce a stringified
+/// form of the resulting expression.
+///
+/// This method operates on librustc objects.
+fn librustc_brackets(mut librustc_expr: P<ast::Expr>) -> Option<P<ast::Expr>> {
+ use rustc_ast::ast::{
+ Attribute, Block, BorrowKind, Expr, ExprField, ExprKind, GenericArg, Local, LocalKind, Pat,
+ Stmt, StmtKind, StructExpr, StructRest, Ty,
+ };
+ use rustc_ast::mut_visit::{noop_visit_generic_arg, noop_visit_local, MutVisitor};
+ use rustc_data_structures::map_in_place::MapInPlace;
+ use rustc_span::DUMMY_SP;
+ use std::mem;
+ use std::ops::DerefMut;
+ use thin_vec::ThinVec;
+
+ struct BracketsVisitor {
+ failed: bool,
+ }
+
+ fn flat_map_field<T: MutVisitor>(mut f: ExprField, vis: &mut T) -> Vec<ExprField> {
+ if f.is_shorthand {
+ noop_visit_expr(&mut f.expr, vis);
+ } else {
+ vis.visit_expr(&mut f.expr);
+ }
+ vec![f]
+ }
+
+ fn flat_map_stmt<T: MutVisitor>(stmt: Stmt, vis: &mut T) -> Vec<Stmt> {
+ let kind = match stmt.kind {
+ // Don't wrap toplevel expressions in statements.
+ StmtKind::Expr(mut e) => {
+ noop_visit_expr(&mut e, vis);
+ StmtKind::Expr(e)
+ }
+ StmtKind::Semi(mut e) => {
+ noop_visit_expr(&mut e, vis);
+ StmtKind::Semi(e)
+ }
+ s => s,
+ };
+
+ vec![Stmt { kind, ..stmt }]
+ }
+
+ fn noop_visit_expr<T: MutVisitor>(e: &mut Expr, vis: &mut T) {
+ use rustc_ast::mut_visit::{noop_visit_expr, visit_attrs};
+ match &mut e.kind {
+ ExprKind::AddrOf(BorrowKind::Raw, ..) => {}
+ ExprKind::Struct(expr) => {
+ let StructExpr {
+ qself,
+ path,
+ fields,
+ rest,
+ } = expr.deref_mut();
+ vis.visit_qself(qself);
+ vis.visit_path(path);
+ fields.flat_map_in_place(|field| flat_map_field(field, vis));
+ if let StructRest::Base(rest) = rest {
+ vis.visit_expr(rest);
+ }
+ vis.visit_id(&mut e.id);
+ vis.visit_span(&mut e.span);
+ visit_attrs(&mut e.attrs, vis);
+ }
+ _ => noop_visit_expr(e, vis),
+ }
+ }
+
+ impl MutVisitor for BracketsVisitor {
+ fn visit_expr(&mut self, e: &mut P<Expr>) {
+ match e.kind {
+ ExprKind::ConstBlock(..) => {}
+ _ => noop_visit_expr(e, self),
+ }
+ match e.kind {
+ ExprKind::If(..) | ExprKind::Block(..) | ExprKind::Let(..) => {}
+ _ => {
+ let inner = mem::replace(
+ e,
+ P(Expr {
+ id: ast::DUMMY_NODE_ID,
+ kind: ExprKind::Err,
+ span: DUMMY_SP,
+ attrs: ThinVec::new(),
+ tokens: None,
+ }),
+ );
+ e.kind = ExprKind::Paren(inner);
+ }
+ }
+ }
+
+ fn visit_generic_arg(&mut self, arg: &mut GenericArg) {
+ match arg {
+ // Don't wrap unbraced const generic arg as that's invalid syntax.
+ GenericArg::Const(anon_const) => {
+ if let ExprKind::Block(..) = &mut anon_const.value.kind {
+ noop_visit_expr(&mut anon_const.value, self);
+ }
+ }
+ _ => noop_visit_generic_arg(arg, self),
+ }
+ }
+
+ fn visit_block(&mut self, block: &mut P<Block>) {
+ self.visit_id(&mut block.id);
+ block
+ .stmts
+ .flat_map_in_place(|stmt| flat_map_stmt(stmt, self));
+ self.visit_span(&mut block.span);
+ }
+
+ fn visit_local(&mut self, local: &mut P<Local>) {
+ match local.kind {
+ LocalKind::InitElse(..) => {}
+ _ => noop_visit_local(local, self),
+ }
+ }
+
+ // We don't want to look at expressions that might appear in patterns or
+ // types yet. We'll look into comparing those in the future. For now
+ // focus on expressions appearing in other places.
+ fn visit_pat(&mut self, pat: &mut P<Pat>) {
+ _ = pat;
+ }
+
+ fn visit_ty(&mut self, ty: &mut P<Ty>) {
+ _ = ty;
+ }
+
+ fn visit_attribute(&mut self, attr: &mut Attribute) {
+ _ = attr;
+ }
+ }
+
+ let mut folder = BracketsVisitor { failed: false };
+ folder.visit_expr(&mut librustc_expr);
+ if folder.failed {
+ None
+ } else {
+ Some(librustc_expr)
+ }
+}
+
+/// Wrap every expression which is not already wrapped in parens with parens, to
+/// reveal the precedence of the parsed expressions, and produce a stringified
+/// form of the resulting expression.
+fn syn_brackets(syn_expr: syn::Expr) -> syn::Expr {
+ use syn::fold::{fold_expr, fold_generic_argument, fold_generic_method_argument, Fold};
+ use syn::{token, Expr, ExprParen, GenericArgument, GenericMethodArgument, Pat, Stmt, Type};
+
+ struct ParenthesizeEveryExpr;
+ impl Fold for ParenthesizeEveryExpr {
+ fn fold_expr(&mut self, expr: Expr) -> Expr {
+ match expr {
+ Expr::Group(_) => unreachable!(),
+ Expr::If(..) | Expr::Unsafe(..) | Expr::Block(..) | Expr::Let(..) => {
+ fold_expr(self, expr)
+ }
+ _ => Expr::Paren(ExprParen {
+ attrs: Vec::new(),
+ expr: Box::new(fold_expr(self, expr)),
+ paren_token: token::Paren::default(),
+ }),
+ }
+ }
+
+ fn fold_generic_argument(&mut self, arg: GenericArgument) -> GenericArgument {
+ match arg {
+ GenericArgument::Const(arg) => GenericArgument::Const(match arg {
+ Expr::Block(_) => fold_expr(self, arg),
+ // Don't wrap unbraced const generic arg as that's invalid syntax.
+ _ => arg,
+ }),
+ _ => fold_generic_argument(self, arg),
+ }
+ }
+
+ fn fold_generic_method_argument(
+ &mut self,
+ arg: GenericMethodArgument,
+ ) -> GenericMethodArgument {
+ match arg {
+ GenericMethodArgument::Const(arg) => GenericMethodArgument::Const(match arg {
+ Expr::Block(_) => fold_expr(self, arg),
+ // Don't wrap unbraced const generic arg as that's invalid syntax.
+ _ => arg,
+ }),
+ _ => fold_generic_method_argument(self, arg),
+ }
+ }
+
+ fn fold_stmt(&mut self, stmt: Stmt) -> Stmt {
+ match stmt {
+ // Don't wrap toplevel expressions in statements.
+ Stmt::Expr(e) => Stmt::Expr(fold_expr(self, e)),
+ Stmt::Semi(e, semi) => {
+ if let Expr::Verbatim(_) = e {
+ Stmt::Semi(e, semi)
+ } else {
+ Stmt::Semi(fold_expr(self, e), semi)
+ }
+ }
+ s => s,
+ }
+ }
+
+ // We don't want to look at expressions that might appear in patterns or
+ // types yet. We'll look into comparing those in the future. For now
+ // focus on expressions appearing in other places.
+ fn fold_pat(&mut self, pat: Pat) -> Pat {
+ pat
+ }
+
+ fn fold_type(&mut self, ty: Type) -> Type {
+ ty
+ }
+ }
+
+ let mut folder = ParenthesizeEveryExpr;
+ folder.fold_expr(syn_expr)
+}
+
+/// Walk through a crate collecting all expressions we can find in it.
+fn collect_exprs(file: syn::File) -> Vec<syn::Expr> {
+ use syn::fold::Fold;
+ use syn::punctuated::Punctuated;
+ use syn::{token, ConstParam, Expr, ExprTuple, Path};
+
+ struct CollectExprs(Vec<Expr>);
+ impl Fold for CollectExprs {
+ fn fold_expr(&mut self, expr: Expr) -> Expr {
+ match expr {
+ Expr::Verbatim(_) => {}
+ _ => self.0.push(expr),
+ }
+
+ Expr::Tuple(ExprTuple {
+ attrs: vec![],
+ elems: Punctuated::new(),
+ paren_token: token::Paren::default(),
+ })
+ }
+
+ fn fold_path(&mut self, path: Path) -> Path {
+ // Skip traversing into const generic path arguments
+ path
+ }
+
+ fn fold_const_param(&mut self, const_param: ConstParam) -> ConstParam {
+ const_param
+ }
+ }
+
+ let mut folder = CollectExprs(vec![]);
+ folder.fold_file(file);
+ folder.0
+}
diff --git a/third_party/rust/syn/tests/test_receiver.rs b/third_party/rust/syn/tests/test_receiver.rs
new file mode 100644
index 0000000000..923df96ba9
--- /dev/null
+++ b/third_party/rust/syn/tests/test_receiver.rs
@@ -0,0 +1,127 @@
+use syn::{parse_quote, FnArg, Receiver, TraitItemMethod};
+
+#[test]
+fn test_by_value() {
+ let TraitItemMethod { sig, .. } = parse_quote! {
+ fn by_value(self: Self);
+ };
+ match sig.receiver() {
+ Some(FnArg::Typed(_)) => (),
+ value => panic!("expected FnArg::Typed, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_by_mut_value() {
+ let TraitItemMethod { sig, .. } = parse_quote! {
+ fn by_mut(mut self: Self);
+ };
+ match sig.receiver() {
+ Some(FnArg::Typed(_)) => (),
+ value => panic!("expected FnArg::Typed, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_by_ref() {
+ let TraitItemMethod { sig, .. } = parse_quote! {
+ fn by_ref(self: &Self);
+ };
+ match sig.receiver() {
+ Some(FnArg::Typed(_)) => (),
+ value => panic!("expected FnArg::Typed, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_by_box() {
+ let TraitItemMethod { sig, .. } = parse_quote! {
+ fn by_box(self: Box<Self>);
+ };
+ match sig.receiver() {
+ Some(FnArg::Typed(_)) => (),
+ value => panic!("expected FnArg::Typed, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_by_pin() {
+ let TraitItemMethod { sig, .. } = parse_quote! {
+ fn by_pin(self: Pin<Self>);
+ };
+ match sig.receiver() {
+ Some(FnArg::Typed(_)) => (),
+ value => panic!("expected FnArg::Typed, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_explicit_type() {
+ let TraitItemMethod { sig, .. } = parse_quote! {
+ fn explicit_type(self: Pin<MyType>);
+ };
+ match sig.receiver() {
+ Some(FnArg::Typed(_)) => (),
+ value => panic!("expected FnArg::Typed, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_value_shorthand() {
+ let TraitItemMethod { sig, .. } = parse_quote! {
+ fn value_shorthand(self);
+ };
+ match sig.receiver() {
+ Some(FnArg::Receiver(Receiver {
+ reference: None,
+ mutability: None,
+ ..
+ })) => (),
+ value => panic!("expected FnArg::Receiver without ref/mut, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_mut_value_shorthand() {
+ let TraitItemMethod { sig, .. } = parse_quote! {
+ fn mut_value_shorthand(mut self);
+ };
+ match sig.receiver() {
+ Some(FnArg::Receiver(Receiver {
+ reference: None,
+ mutability: Some(_),
+ ..
+ })) => (),
+ value => panic!("expected FnArg::Receiver with mut, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_ref_shorthand() {
+ let TraitItemMethod { sig, .. } = parse_quote! {
+ fn ref_shorthand(&self);
+ };
+ match sig.receiver() {
+ Some(FnArg::Receiver(Receiver {
+ reference: Some(_),
+ mutability: None,
+ ..
+ })) => (),
+ value => panic!("expected FnArg::Receiver with ref, got {:?}", value),
+ }
+}
+
+#[test]
+fn test_ref_mut_shorthand() {
+ let TraitItemMethod { sig, .. } = parse_quote! {
+ fn ref_mut_shorthand(&mut self);
+ };
+ match sig.receiver() {
+ Some(FnArg::Receiver(Receiver {
+ reference: Some(_),
+ mutability: Some(_),
+ ..
+ })) => (),
+ value => panic!("expected FnArg::Receiver with ref+mut, got {:?}", value),
+ }
+}
diff --git a/third_party/rust/syn/tests/test_round_trip.rs b/third_party/rust/syn/tests/test_round_trip.rs
new file mode 100644
index 0000000000..9a5801d449
--- /dev/null
+++ b/third_party/rust/syn/tests/test_round_trip.rs
@@ -0,0 +1,241 @@
+#![cfg(not(syn_disable_nightly_tests))]
+#![cfg(not(miri))]
+#![recursion_limit = "1024"]
+#![feature(rustc_private)]
+#![allow(clippy::manual_assert)]
+
+extern crate rustc_ast;
+extern crate rustc_data_structures;
+extern crate rustc_error_messages;
+extern crate rustc_errors;
+extern crate rustc_expand;
+extern crate rustc_parse as parse;
+extern crate rustc_session;
+extern crate rustc_span;
+
+use crate::common::eq::SpanlessEq;
+use quote::quote;
+use rayon::iter::{IntoParallelIterator, ParallelIterator};
+use rustc_ast::ast::{
+ AngleBracketedArg, AngleBracketedArgs, Crate, GenericArg, GenericParamKind, Generics,
+ WhereClause,
+};
+use rustc_ast::mut_visit::{self, MutVisitor};
+use rustc_error_messages::{DiagnosticMessage, LazyFallbackBundle};
+use rustc_errors::{translation, Diagnostic, PResult};
+use rustc_session::parse::ParseSess;
+use rustc_span::source_map::FilePathMapping;
+use rustc_span::FileName;
+use std::fs;
+use std::panic;
+use std::path::Path;
+use std::process;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::time::Instant;
+use walkdir::{DirEntry, WalkDir};
+
+#[macro_use]
+mod macros;
+
+#[allow(dead_code)]
+mod common;
+
+mod repo;
+
+#[test]
+fn test_round_trip() {
+ common::rayon_init();
+ repo::clone_rust();
+ let abort_after = common::abort_after();
+ if abort_after == 0 {
+ panic!("Skipping all round_trip tests");
+ }
+
+ let failed = AtomicUsize::new(0);
+
+ WalkDir::new("tests/rust")
+ .sort_by(|a, b| a.file_name().cmp(b.file_name()))
+ .into_iter()
+ .filter_entry(repo::base_dir_filter)
+ .collect::<Result<Vec<DirEntry>, walkdir::Error>>()
+ .unwrap()
+ .into_par_iter()
+ .for_each(|entry| {
+ let path = entry.path();
+ if !path.is_dir() {
+ test(path, &failed, abort_after);
+ }
+ });
+
+ let failed = failed.load(Ordering::Relaxed);
+ if failed > 0 {
+ panic!("{} failures", failed);
+ }
+}
+
+fn test(path: &Path, failed: &AtomicUsize, abort_after: usize) {
+ let content = fs::read_to_string(path).unwrap();
+
+ let start = Instant::now();
+ let (krate, elapsed) = match syn::parse_file(&content) {
+ Ok(krate) => (krate, start.elapsed()),
+ Err(msg) => {
+ errorf!("=== {}: syn failed to parse\n{:?}\n", path.display(), msg);
+ let prev_failed = failed.fetch_add(1, Ordering::Relaxed);
+ if prev_failed + 1 >= abort_after {
+ process::exit(1);
+ }
+ return;
+ }
+ };
+ let back = quote!(#krate).to_string();
+ let edition = repo::edition(path).parse().unwrap();
+
+ rustc_span::create_session_if_not_set_then(edition, |_| {
+ let equal = match panic::catch_unwind(|| {
+ let sess = ParseSess::new(FilePathMapping::empty());
+ let before = match librustc_parse(content, &sess) {
+ Ok(before) => before,
+ Err(diagnostic) => {
+ errorf!(
+ "=== {}: ignore - librustc failed to parse original content: {}\n",
+ path.display(),
+ translate_message(&diagnostic),
+ );
+ diagnostic.cancel();
+ return Err(true);
+ }
+ };
+ let after = match librustc_parse(back, &sess) {
+ Ok(after) => after,
+ Err(mut diagnostic) => {
+ errorf!("=== {}: librustc failed to parse", path.display());
+ diagnostic.emit();
+ return Err(false);
+ }
+ };
+ Ok((before, after))
+ }) {
+ Err(_) => {
+ errorf!("=== {}: ignoring librustc panic\n", path.display());
+ true
+ }
+ Ok(Err(equal)) => equal,
+ Ok(Ok((mut before, mut after))) => {
+ normalize(&mut before);
+ normalize(&mut after);
+ if SpanlessEq::eq(&before, &after) {
+ errorf!(
+ "=== {}: pass in {}ms\n",
+ path.display(),
+ elapsed.as_secs() * 1000 + u64::from(elapsed.subsec_nanos()) / 1_000_000
+ );
+ true
+ } else {
+ errorf!(
+ "=== {}: FAIL\nbefore: {:#?}\nafter: {:#?}\n",
+ path.display(),
+ before,
+ after,
+ );
+ false
+ }
+ }
+ };
+ if !equal {
+ let prev_failed = failed.fetch_add(1, Ordering::Relaxed);
+ if prev_failed + 1 >= abort_after {
+ process::exit(1);
+ }
+ }
+ });
+}
+
+fn librustc_parse(content: String, sess: &ParseSess) -> PResult<Crate> {
+ static COUNTER: AtomicUsize = AtomicUsize::new(0);
+ let counter = COUNTER.fetch_add(1, Ordering::Relaxed);
+ let name = FileName::Custom(format!("test_round_trip{}", counter));
+ parse::parse_crate_from_source_str(name, content, sess)
+}
+
+fn translate_message(diagnostic: &Diagnostic) -> String {
+ thread_local! {
+ static FLUENT_BUNDLE: LazyFallbackBundle = {
+ let resources = rustc_error_messages::DEFAULT_LOCALE_RESOURCES;
+ let with_directionality_markers = false;
+ rustc_error_messages::fallback_fluent_bundle(resources, with_directionality_markers)
+ };
+ }
+
+ let message = &diagnostic.message[0].0;
+ let args = translation::to_fluent_args(diagnostic.args());
+
+ let (identifier, attr) = match message {
+ DiagnosticMessage::Str(msg) | DiagnosticMessage::Eager(msg) => return msg.clone(),
+ DiagnosticMessage::FluentIdentifier(identifier, attr) => (identifier, attr),
+ };
+
+ FLUENT_BUNDLE.with(|fluent_bundle| {
+ let message = fluent_bundle
+ .get_message(identifier)
+ .expect("missing diagnostic in fluent bundle");
+ let value = match attr {
+ Some(attr) => message
+ .get_attribute(attr)
+ .expect("missing attribute in fluent message")
+ .value(),
+ None => message.value().expect("missing value in fluent message"),
+ };
+
+ let mut err = Vec::new();
+ let translated = fluent_bundle.format_pattern(value, Some(&args), &mut err);
+ assert!(err.is_empty());
+ translated.into_owned()
+ })
+}
+
+fn normalize(krate: &mut Crate) {
+ struct NormalizeVisitor;
+
+ impl MutVisitor for NormalizeVisitor {
+ fn visit_angle_bracketed_parameter_data(&mut self, e: &mut AngleBracketedArgs) {
+ #[derive(Ord, PartialOrd, Eq, PartialEq)]
+ enum Group {
+ Lifetimes,
+ TypesAndConsts,
+ Constraints,
+ }
+ e.args.sort_by_key(|arg| match arg {
+ AngleBracketedArg::Arg(arg) => match arg {
+ GenericArg::Lifetime(_) => Group::Lifetimes,
+ GenericArg::Type(_) | GenericArg::Const(_) => Group::TypesAndConsts,
+ },
+ AngleBracketedArg::Constraint(_) => Group::Constraints,
+ });
+ mut_visit::noop_visit_angle_bracketed_parameter_data(e, self);
+ }
+
+ fn visit_generics(&mut self, e: &mut Generics) {
+ #[derive(Ord, PartialOrd, Eq, PartialEq)]
+ enum Group {
+ Lifetimes,
+ TypesAndConsts,
+ }
+ e.params.sort_by_key(|param| match param.kind {
+ GenericParamKind::Lifetime => Group::Lifetimes,
+ GenericParamKind::Type { .. } | GenericParamKind::Const { .. } => {
+ Group::TypesAndConsts
+ }
+ });
+ mut_visit::noop_visit_generics(e, self);
+ }
+
+ fn visit_where_clause(&mut self, e: &mut WhereClause) {
+ if e.predicates.is_empty() {
+ e.has_where_token = false;
+ }
+ }
+ }
+
+ NormalizeVisitor.visit_crate(krate);
+}
diff --git a/third_party/rust/syn/tests/test_shebang.rs b/third_party/rust/syn/tests/test_shebang.rs
new file mode 100644
index 0000000000..dc26b9aab3
--- /dev/null
+++ b/third_party/rust/syn/tests/test_shebang.rs
@@ -0,0 +1,59 @@
+#[macro_use]
+mod macros;
+
+#[test]
+fn test_basic() {
+ let content = "#!/usr/bin/env rustx\nfn main() {}";
+ let file = syn::parse_file(content).unwrap();
+ snapshot!(file, @r###"
+ File {
+ shebang: Some("#!/usr/bin/env rustx"),
+ items: [
+ Item::Fn {
+ vis: Inherited,
+ sig: Signature {
+ ident: "main",
+ generics: Generics,
+ output: Default,
+ },
+ block: Block,
+ },
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_comment() {
+ let content = "#!//am/i/a/comment\n[allow(dead_code)] fn main() {}";
+ let file = syn::parse_file(content).unwrap();
+ snapshot!(file, @r###"
+ File {
+ attrs: [
+ Attribute {
+ style: Inner,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "allow",
+ arguments: None,
+ },
+ ],
+ },
+ tokens: TokenStream(`(dead_code)`),
+ },
+ ],
+ items: [
+ Item::Fn {
+ vis: Inherited,
+ sig: Signature {
+ ident: "main",
+ generics: Generics,
+ output: Default,
+ },
+ block: Block,
+ },
+ ],
+ }
+ "###);
+}
diff --git a/third_party/rust/syn/tests/test_should_parse.rs b/third_party/rust/syn/tests/test_should_parse.rs
new file mode 100644
index 0000000000..180d859916
--- /dev/null
+++ b/third_party/rust/syn/tests/test_should_parse.rs
@@ -0,0 +1,45 @@
+macro_rules! should_parse {
+ ($name:ident, { $($in:tt)* }) => {
+ #[test]
+ fn $name() {
+ // Make sure we can parse the file!
+ syn::parse_file(stringify!($($in)*)).unwrap();
+ }
+ }
+}
+
+should_parse!(generic_associated_type, {
+ impl Foo {
+ type Item = &'a i32;
+ fn foo<'a>(&'a self) -> Self::Item<'a> {}
+ }
+});
+
+#[rustfmt::skip]
+should_parse!(const_generics_use, {
+ type X = Foo<5>;
+ type Y = Foo<"foo">;
+ type Z = Foo<X>;
+ type W = Foo<{ X + 10 }>;
+});
+
+should_parse!(trailing_plus_type, {
+ type A = Box<Foo>;
+ type A = Box<Foo + 'a>;
+ type A = Box<'a + Foo>;
+});
+
+should_parse!(generic_associated_type_where, {
+ trait Foo {
+ type Item;
+ fn foo<T>(&self, t: T) -> Self::Item<T>;
+ }
+});
+
+should_parse!(match_with_block_expr, {
+ fn main() {
+ match false {
+ _ => {}.a(),
+ }
+ }
+});
diff --git a/third_party/rust/syn/tests/test_size.rs b/third_party/rust/syn/tests/test_size.rs
new file mode 100644
index 0000000000..32c6edaed6
--- /dev/null
+++ b/third_party/rust/syn/tests/test_size.rs
@@ -0,0 +1,29 @@
+#![cfg(target_pointer_width = "64")]
+
+use std::mem;
+use syn::{Expr, Item, Lit, Pat, Type};
+
+#[test]
+fn test_expr_size() {
+ assert_eq!(mem::size_of::<Expr>(), 272);
+}
+
+#[test]
+fn test_item_size() {
+ assert_eq!(mem::size_of::<Item>(), 320);
+}
+
+#[test]
+fn test_type_size() {
+ assert_eq!(mem::size_of::<Type>(), 288);
+}
+
+#[test]
+fn test_pat_size() {
+ assert_eq!(mem::size_of::<Pat>(), 144);
+}
+
+#[test]
+fn test_lit_size() {
+ assert_eq!(mem::size_of::<Lit>(), 32);
+}
diff --git a/third_party/rust/syn/tests/test_stmt.rs b/third_party/rust/syn/tests/test_stmt.rs
new file mode 100644
index 0000000000..f444e5b49e
--- /dev/null
+++ b/third_party/rust/syn/tests/test_stmt.rs
@@ -0,0 +1,93 @@
+#![allow(clippy::assertions_on_result_states, clippy::non_ascii_literal)]
+
+#[macro_use]
+mod macros;
+
+use proc_macro2::{Delimiter, Group, Ident, Span, TokenStream, TokenTree};
+use quote::quote;
+use std::iter::FromIterator;
+use syn::Stmt;
+
+#[test]
+fn test_raw_operator() {
+ let stmt = syn::parse_str::<Stmt>("let _ = &raw const x;").unwrap();
+
+ snapshot!(stmt, @r###"
+ Local(Local {
+ pat: Pat::Wild,
+ init: Some(Verbatim(`& raw const x`)),
+ })
+ "###);
+}
+
+#[test]
+fn test_raw_variable() {
+ let stmt = syn::parse_str::<Stmt>("let _ = &raw;").unwrap();
+
+ snapshot!(stmt, @r###"
+ Local(Local {
+ pat: Pat::Wild,
+ init: Some(Expr::Reference {
+ expr: Expr::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "raw",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ }),
+ })
+ "###);
+}
+
+#[test]
+fn test_raw_invalid() {
+ assert!(syn::parse_str::<Stmt>("let _ = &raw x;").is_err());
+}
+
+#[test]
+fn test_none_group() {
+ // <Ø async fn f() {} Ø>
+ let tokens = TokenStream::from_iter(vec![TokenTree::Group(Group::new(
+ Delimiter::None,
+ TokenStream::from_iter(vec![
+ TokenTree::Ident(Ident::new("async", Span::call_site())),
+ TokenTree::Ident(Ident::new("fn", Span::call_site())),
+ TokenTree::Ident(Ident::new("f", Span::call_site())),
+ TokenTree::Group(Group::new(Delimiter::Parenthesis, TokenStream::new())),
+ TokenTree::Group(Group::new(Delimiter::Brace, TokenStream::new())),
+ ]),
+ ))]);
+
+ snapshot!(tokens as Stmt, @r###"
+ Item(Item::Fn {
+ vis: Inherited,
+ sig: Signature {
+ asyncness: Some,
+ ident: "f",
+ generics: Generics,
+ output: Default,
+ },
+ block: Block,
+ })
+ "###);
+}
+
+#[test]
+fn test_let_dot_dot() {
+ let tokens = quote! {
+ let .. = 10;
+ };
+
+ snapshot!(tokens as Stmt, @r###"
+ Local(Local {
+ pat: Pat::Rest,
+ init: Some(Expr::Lit {
+ lit: 10,
+ }),
+ })
+ "###);
+}
diff --git a/third_party/rust/syn/tests/test_token_trees.rs b/third_party/rust/syn/tests/test_token_trees.rs
new file mode 100644
index 0000000000..5b00448af8
--- /dev/null
+++ b/third_party/rust/syn/tests/test_token_trees.rs
@@ -0,0 +1,30 @@
+#[macro_use]
+mod macros;
+
+use proc_macro2::TokenStream;
+use quote::quote;
+use syn::Lit;
+
+#[test]
+fn test_struct() {
+ let input = "
+ #[derive(Debug, Clone)]
+ pub struct Item {
+ pub ident: Ident,
+ pub attrs: Vec<Attribute>,
+ }
+ ";
+
+ snapshot!(input as TokenStream, @r###"
+ TokenStream(
+ `# [derive (Debug , Clone)] pub struct Item { pub ident : Ident , pub attrs : Vec < Attribute >, }`,
+ )
+ "###);
+}
+
+#[test]
+fn test_literal_mangling() {
+ let code = "0_4";
+ let parsed: Lit = syn::parse_str(code).unwrap();
+ assert_eq!(code, quote!(#parsed).to_string());
+}
diff --git a/third_party/rust/syn/tests/test_ty.rs b/third_party/rust/syn/tests/test_ty.rs
new file mode 100644
index 0000000000..335cafa2ac
--- /dev/null
+++ b/third_party/rust/syn/tests/test_ty.rs
@@ -0,0 +1,352 @@
+#[macro_use]
+mod macros;
+
+use proc_macro2::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree};
+use quote::quote;
+use std::iter::FromIterator;
+use syn::Type;
+
+#[test]
+fn test_mut_self() {
+ syn::parse_str::<Type>("fn(mut self)").unwrap();
+ syn::parse_str::<Type>("fn(mut self,)").unwrap();
+ syn::parse_str::<Type>("fn(mut self: ())").unwrap();
+ syn::parse_str::<Type>("fn(mut self: ...)").unwrap_err();
+ syn::parse_str::<Type>("fn(mut self: mut self)").unwrap_err();
+ syn::parse_str::<Type>("fn(mut self::T)").unwrap_err();
+}
+
+#[test]
+fn test_macro_variable_type() {
+ // mimics the token stream corresponding to `$ty<T>`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { ty })),
+ TokenTree::Punct(Punct::new('<', Spacing::Alone)),
+ TokenTree::Ident(Ident::new("T", Span::call_site())),
+ TokenTree::Punct(Punct::new('>', Spacing::Alone)),
+ ]);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "ty",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ Type(Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ }
+ "###);
+
+ // mimics the token stream corresponding to `$ty::<T>`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { ty })),
+ TokenTree::Punct(Punct::new(':', Spacing::Joint)),
+ TokenTree::Punct(Punct::new(':', Spacing::Alone)),
+ TokenTree::Punct(Punct::new('<', Spacing::Alone)),
+ TokenTree::Ident(Ident::new("T", Span::call_site())),
+ TokenTree::Punct(Punct::new('>', Spacing::Alone)),
+ ]);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "ty",
+ arguments: PathArguments::AngleBracketed {
+ colon2_token: Some,
+ args: [
+ Type(Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_group_angle_brackets() {
+ // mimics the token stream corresponding to `Option<$ty>`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Ident(Ident::new("Option", Span::call_site())),
+ TokenTree::Punct(Punct::new('<', Spacing::Alone)),
+ TokenTree::Group(Group::new(Delimiter::None, quote! { Vec<u8> })),
+ TokenTree::Punct(Punct::new('>', Spacing::Alone)),
+ ]);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Option",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ Type(Type::Group {
+ elem: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Vec",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ Type(Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "u8",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ },
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_group_colons() {
+ // mimics the token stream corresponding to `$ty::Item`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { Vec<u8> })),
+ TokenTree::Punct(Punct::new(':', Spacing::Joint)),
+ TokenTree::Punct(Punct::new(':', Spacing::Alone)),
+ TokenTree::Ident(Ident::new("Item", Span::call_site())),
+ ]);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Vec",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ Type(Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "u8",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ },
+ PathSegment {
+ ident: "Item",
+ arguments: None,
+ },
+ ],
+ },
+ }
+ "###);
+
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { [T] })),
+ TokenTree::Punct(Punct::new(':', Spacing::Joint)),
+ TokenTree::Punct(Punct::new(':', Spacing::Alone)),
+ TokenTree::Ident(Ident::new("Element", Span::call_site())),
+ ]);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ qself: Some(QSelf {
+ ty: Type::Slice {
+ elem: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ arguments: None,
+ },
+ ],
+ },
+ },
+ },
+ position: 0,
+ }),
+ path: Path {
+ leading_colon: Some,
+ segments: [
+ PathSegment {
+ ident: "Element",
+ arguments: None,
+ },
+ ],
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_trait_object() {
+ let tokens = quote!(dyn for<'a> Trait<'a> + 'static);
+ snapshot!(tokens as Type, @r###"
+ Type::TraitObject {
+ dyn_token: Some,
+ bounds: [
+ Trait(TraitBound {
+ modifier: None,
+ lifetimes: Some(BoundLifetimes {
+ lifetimes: [
+ LifetimeDef {
+ lifetime: Lifetime {
+ ident: "a",
+ },
+ },
+ ],
+ }),
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ Lifetime(Lifetime {
+ ident: "a",
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ }),
+ Lifetime(Lifetime {
+ ident: "static",
+ }),
+ ],
+ }
+ "###);
+
+ let tokens = quote!(dyn 'a + Trait);
+ snapshot!(tokens as Type, @r###"
+ Type::TraitObject {
+ dyn_token: Some,
+ bounds: [
+ Lifetime(Lifetime {
+ ident: "a",
+ }),
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ }
+ "###);
+
+ // None of the following are valid Rust types.
+ syn::parse_str::<Type>("for<'a> dyn Trait<'a>").unwrap_err();
+ syn::parse_str::<Type>("dyn for<'a> 'a + Trait").unwrap_err();
+}
+
+#[test]
+fn test_trailing_plus() {
+ #[rustfmt::skip]
+ let tokens = quote!(impl Trait +);
+ snapshot!(tokens as Type, @r###"
+ Type::ImplTrait {
+ bounds: [
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ }
+ "###);
+
+ #[rustfmt::skip]
+ let tokens = quote!(dyn Trait +);
+ snapshot!(tokens as Type, @r###"
+ Type::TraitObject {
+ dyn_token: Some,
+ bounds: [
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ }
+ "###);
+
+ #[rustfmt::skip]
+ let tokens = quote!(Trait +);
+ snapshot!(tokens as Type, @r###"
+ Type::TraitObject {
+ bounds: [
+ Trait(TraitBound {
+ modifier: None,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ arguments: None,
+ },
+ ],
+ },
+ }),
+ ],
+ }
+ "###);
+}
diff --git a/third_party/rust/syn/tests/test_visibility.rs b/third_party/rust/syn/tests/test_visibility.rs
new file mode 100644
index 0000000000..7b2c00ba34
--- /dev/null
+++ b/third_party/rust/syn/tests/test_visibility.rs
@@ -0,0 +1,148 @@
+#[macro_use]
+mod macros;
+
+use proc_macro2::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree};
+use std::iter::FromIterator;
+use syn::parse::{Parse, ParseStream};
+use syn::{DeriveInput, Result, Visibility};
+
+#[derive(Debug)]
+struct VisRest {
+ vis: Visibility,
+ rest: TokenStream,
+}
+
+impl Parse for VisRest {
+ fn parse(input: ParseStream) -> Result<Self> {
+ Ok(VisRest {
+ vis: input.parse()?,
+ rest: input.parse()?,
+ })
+ }
+}
+
+macro_rules! assert_vis_parse {
+ ($input:expr, Ok($p:pat)) => {
+ assert_vis_parse!($input, Ok($p) + "");
+ };
+
+ ($input:expr, Ok($p:pat) + $rest:expr) => {
+ let expected = $rest.parse::<TokenStream>().unwrap();
+ let parse: VisRest = syn::parse_str($input).unwrap();
+
+ match parse.vis {
+ $p => {}
+ _ => panic!("Expected {}, got {:?}", stringify!($p), parse.vis),
+ }
+
+ // NOTE: Round-trips through `to_string` to avoid potential whitespace
+ // diffs.
+ assert_eq!(parse.rest.to_string(), expected.to_string());
+ };
+
+ ($input:expr, Err) => {
+ syn::parse2::<VisRest>($input.parse().unwrap()).unwrap_err();
+ };
+}
+
+#[test]
+fn test_pub() {
+ assert_vis_parse!("pub", Ok(Visibility::Public(_)));
+}
+
+#[test]
+fn test_crate() {
+ assert_vis_parse!("crate", Ok(Visibility::Crate(_)));
+}
+
+#[test]
+fn test_inherited() {
+ assert_vis_parse!("", Ok(Visibility::Inherited));
+}
+
+#[test]
+fn test_in() {
+ assert_vis_parse!("pub(in foo::bar)", Ok(Visibility::Restricted(_)));
+}
+
+#[test]
+fn test_pub_crate() {
+ assert_vis_parse!("pub(crate)", Ok(Visibility::Restricted(_)));
+}
+
+#[test]
+fn test_pub_self() {
+ assert_vis_parse!("pub(self)", Ok(Visibility::Restricted(_)));
+}
+
+#[test]
+fn test_pub_super() {
+ assert_vis_parse!("pub(super)", Ok(Visibility::Restricted(_)));
+}
+
+#[test]
+fn test_missing_in() {
+ assert_vis_parse!("pub(foo::bar)", Ok(Visibility::Public(_)) + "(foo::bar)");
+}
+
+#[test]
+fn test_missing_in_path() {
+ assert_vis_parse!("pub(in)", Err);
+}
+
+#[test]
+fn test_crate_path() {
+ assert_vis_parse!(
+ "pub(crate::A, crate::B)",
+ Ok(Visibility::Public(_)) + "(crate::A, crate::B)"
+ );
+}
+
+#[test]
+fn test_junk_after_in() {
+ assert_vis_parse!("pub(in some::path @@garbage)", Err);
+}
+
+#[test]
+fn test_empty_group_vis() {
+ // mimics `struct S { $vis $field: () }` where $vis is empty
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Ident(Ident::new("struct", Span::call_site())),
+ TokenTree::Ident(Ident::new("S", Span::call_site())),
+ TokenTree::Group(Group::new(
+ Delimiter::Brace,
+ TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, TokenStream::new())),
+ TokenTree::Group(Group::new(
+ Delimiter::None,
+ TokenStream::from_iter(vec![TokenTree::Ident(Ident::new(
+ "f",
+ Span::call_site(),
+ ))]),
+ )),
+ TokenTree::Punct(Punct::new(':', Spacing::Alone)),
+ TokenTree::Group(Group::new(Delimiter::Parenthesis, TokenStream::new())),
+ ]),
+ )),
+ ]);
+
+ snapshot!(tokens as DeriveInput, @r###"
+ DeriveInput {
+ vis: Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Named {
+ named: [
+ Field {
+ vis: Inherited,
+ ident: Some("f"),
+ colon_token: Some,
+ ty: Type::Tuple,
+ },
+ ],
+ },
+ },
+ }
+ "###);
+}
diff --git a/third_party/rust/syn/tests/zzz_stable.rs b/third_party/rust/syn/tests/zzz_stable.rs
new file mode 100644
index 0000000000..a1a670d9ed
--- /dev/null
+++ b/third_party/rust/syn/tests/zzz_stable.rs
@@ -0,0 +1,33 @@
+#![cfg(syn_disable_nightly_tests)]
+
+use std::io::{self, Write};
+use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, WriteColor};
+
+const MSG: &str = "\
+‖
+‖ WARNING:
+‖ This is not a nightly compiler so not all tests were able to
+‖ run. Syn includes tests that compare Syn's parser against the
+‖ compiler's parser, which requires access to unstable librustc
+‖ data structures and a nightly compiler.
+‖
+";
+
+#[test]
+fn notice() -> io::Result<()> {
+ let header = "WARNING";
+ let index_of_header = MSG.find(header).unwrap();
+ let before = &MSG[..index_of_header];
+ let after = &MSG[index_of_header + header.len()..];
+
+ let mut stderr = StandardStream::stderr(ColorChoice::Auto);
+ stderr.set_color(ColorSpec::new().set_fg(Some(Color::Yellow)))?;
+ write!(&mut stderr, "{}", before)?;
+ stderr.set_color(ColorSpec::new().set_bold(true).set_fg(Some(Color::Yellow)))?;
+ write!(&mut stderr, "{}", header)?;
+ stderr.set_color(ColorSpec::new().set_fg(Some(Color::Yellow)))?;
+ write!(&mut stderr, "{}", after)?;
+ stderr.reset()?;
+
+ Ok(())
+}