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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /third_party/rust/quote
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/quote')
-rw-r--r--third_party/rust/quote/.cargo-checksum.json1
-rw-r--r--third_party/rust/quote/Cargo.toml50
-rw-r--r--third_party/rust/quote/LICENSE-APACHE176
-rw-r--r--third_party/rust/quote/LICENSE-MIT23
-rw-r--r--third_party/rust/quote/README.md272
-rw-r--r--third_party/rust/quote/rust-toolchain.toml2
-rw-r--r--third_party/rust/quote/src/ext.rs110
-rw-r--r--third_party/rust/quote/src/format.rs168
-rw-r--r--third_party/rust/quote/src/ident_fragment.rs88
-rw-r--r--third_party/rust/quote/src/lib.rs1444
-rw-r--r--third_party/rust/quote/src/runtime.rs530
-rw-r--r--third_party/rust/quote/src/spanned.rs50
-rw-r--r--third_party/rust/quote/src/to_tokens.rs209
-rw-r--r--third_party/rust/quote/tests/compiletest.rs7
-rw-r--r--third_party/rust/quote/tests/test.rs549
-rw-r--r--third_party/rust/quote/tests/ui/does-not-have-iter-interpolated-dup.rs9
-rw-r--r--third_party/rust/quote/tests/ui/does-not-have-iter-interpolated-dup.stderr11
-rw-r--r--third_party/rust/quote/tests/ui/does-not-have-iter-interpolated.rs9
-rw-r--r--third_party/rust/quote/tests/ui/does-not-have-iter-interpolated.stderr11
-rw-r--r--third_party/rust/quote/tests/ui/does-not-have-iter-separated.rs5
-rw-r--r--third_party/rust/quote/tests/ui/does-not-have-iter-separated.stderr10
-rw-r--r--third_party/rust/quote/tests/ui/does-not-have-iter.rs5
-rw-r--r--third_party/rust/quote/tests/ui/does-not-have-iter.stderr10
-rw-r--r--third_party/rust/quote/tests/ui/not-quotable.rs7
-rw-r--r--third_party/rust/quote/tests/ui/not-quotable.stderr20
-rw-r--r--third_party/rust/quote/tests/ui/not-repeatable.rs8
-rw-r--r--third_party/rust/quote/tests/ui/not-repeatable.stderr35
-rw-r--r--third_party/rust/quote/tests/ui/wrong-type-span.rs7
-rw-r--r--third_party/rust/quote/tests/ui/wrong-type-span.stderr10
29 files changed, 3836 insertions, 0 deletions
diff --git a/third_party/rust/quote/.cargo-checksum.json b/third_party/rust/quote/.cargo-checksum.json
new file mode 100644
index 0000000000..0d900a272d
--- /dev/null
+++ b/third_party/rust/quote/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"0ec1e0fd36354750321a12d04a5e4d9a8d5dc6a8af753183de50da55fc10391b","LICENSE-APACHE":"62c7a1e35f56406896d7aa7ca52d0cc0d272ac022b5d2796e7d6905db8a3636a","LICENSE-MIT":"23f18e03dc49df91622fe2a76176497404e46ced8a715d9d2b67a7446571cca3","README.md":"626e7079eab0baacf0fcaf3e244f407b2014ebaeca45905d72e8fb8bed18aaea","rust-toolchain.toml":"6bbb61302978c736b2da03e4fb40e3beab908f85d533ab46fd541e637b5f3e0f","src/ext.rs":"9881576cac3e476a4bf04f9b601cf9a53b79399fb0ca9634e8b861ac91709843","src/format.rs":"c595015418f35e6992e710441b9999f09b2afe4678b138039d670d100c0bdd86","src/ident_fragment.rs":"0b3e6c2129e55910fd2d240e1e7efba6f1796801d24352d1c0bfbceb0e8b678f","src/lib.rs":"cef1b4c031d401fb87e88a2ed51858c5f8f471e62a6261c1ef0f55ef9e1906a1","src/runtime.rs":"7f37326edaeac2c42ed806b447eeba12e36dd4b1bc25fbf52f8eb23140f3be7a","src/spanned.rs":"3ccf5120593f35787442c0a37d243e802c5262e7f8b35aed503873008ec035c5","src/to_tokens.rs":"1c76311fcc82098e630056d71fd6f3929194ee31b0840e2aa643ed7e78026e3e","tests/compiletest.rs":"022a8e400ef813d7ea1875b944549cee5125f6a995dc33e93b48cba3e1b57bd1","tests/test.rs":"3be80741f84a707376c230d9cf70ce9537caa359691d8d4c34968e28175e4ad7","tests/ui/does-not-have-iter-interpolated-dup.rs":"ad13eea21d4cdd2ab6c082f633392e1ff20fb0d1af5f2177041e0bf7f30da695","tests/ui/does-not-have-iter-interpolated-dup.stderr":"90a4bdb9267535f5d2785940148338d6b7d905548051d2c9c5dcbd58f2c11d8e","tests/ui/does-not-have-iter-interpolated.rs":"83a5b3f240651adcbe4b6e51076d76d653ad439b37442cf4054f1fd3c073f3b7","tests/ui/does-not-have-iter-interpolated.stderr":"ae7c2739554c862b331705e82781aa4687a4375210cef6ae899a4be4a4ec2d97","tests/ui/does-not-have-iter-separated.rs":"fe413c48331d5e3a7ae5fef6a5892a90c72f610d54595879eb49d0a94154ba3f","tests/ui/does-not-have-iter-separated.stderr":"03fd560979ebcd5aa6f83858bc2c3c01ba6546c16335101275505304895c1ae9","tests/ui/does-not-have-iter.rs":"09dc9499d861b63cebb0848b855b78e2dc9497bfde37ba6339f3625ae009a62f","tests/ui/does-not-have-iter.stderr":"d6da483c29e232ced72059bbdf05d31afb1df9e02954edaa9cfaea1ec6df72dc","tests/ui/not-quotable.rs":"5759d0884943417609f28faadc70254a3e2fd3d9bd6ff7297a3fb70a77fafd8a","tests/ui/not-quotable.stderr":"459bdadbf1e73b9401cf7d5d578dc053774bb4e5aa25ad2abf25d6b0f61aa306","tests/ui/not-repeatable.rs":"a4b115c04e4e41049a05f5b69450503fbffeba031218b4189cb931839f7f9a9c","tests/ui/not-repeatable.stderr":"594249d59d16f039c16816f1aaf9933176994e296fcf81d1b8b24d5b66ae0d0a","tests/ui/wrong-type-span.rs":"6195e35ea844c0c52ba1cff5d790c3a371af6915d137d377834ad984229ef9ea","tests/ui/wrong-type-span.stderr":"cad072e40e0ecc04f375122ae41aede2f0da2a9244492b3fcf70249e59d1b128"},"package":"291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"} \ No newline at end of file
diff --git a/third_party/rust/quote/Cargo.toml b/third_party/rust/quote/Cargo.toml
new file mode 100644
index 0000000000..f3222c25db
--- /dev/null
+++ b/third_party/rust/quote/Cargo.toml
@@ -0,0 +1,50 @@
+# 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 = "1.56"
+name = "quote"
+version = "1.0.35"
+authors = ["David Tolnay <dtolnay@gmail.com>"]
+autobenches = false
+description = "Quasi-quoting macro quote!(...)"
+documentation = "https://docs.rs/quote/"
+readme = "README.md"
+keywords = [
+ "macros",
+ "syn",
+]
+categories = ["development-tools::procedural-macro-helpers"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/dtolnay/quote"
+
+[package.metadata.docs.rs]
+rustdoc-args = ["--generate-link-to-definition"]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[lib]
+doc-scrape-examples = false
+
+[dependencies.proc-macro2]
+version = "1.0.74"
+default-features = false
+
+[dev-dependencies.rustversion]
+version = "1.0"
+
+[dev-dependencies.trybuild]
+version = "1.0.66"
+features = ["diff"]
+
+[features]
+default = ["proc-macro"]
+proc-macro = ["proc-macro2/proc-macro"]
diff --git a/third_party/rust/quote/LICENSE-APACHE b/third_party/rust/quote/LICENSE-APACHE
new file mode 100644
index 0000000000..1b5ec8b78e
--- /dev/null
+++ b/third_party/rust/quote/LICENSE-APACHE
@@ -0,0 +1,176 @@
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
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+5. Submission of Contributions. Unless You explicitly state otherwise,
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+6. Trademarks. This License does not grant permission to use the trade
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+END OF TERMS AND CONDITIONS
diff --git a/third_party/rust/quote/LICENSE-MIT b/third_party/rust/quote/LICENSE-MIT
new file mode 100644
index 0000000000..31aa79387f
--- /dev/null
+++ b/third_party/rust/quote/LICENSE-MIT
@@ -0,0 +1,23 @@
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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diff --git a/third_party/rust/quote/README.md b/third_party/rust/quote/README.md
new file mode 100644
index 0000000000..bfc91a9753
--- /dev/null
+++ b/third_party/rust/quote/README.md
@@ -0,0 +1,272 @@
+Rust Quasi-Quoting
+==================
+
+[<img alt="github" src="https://img.shields.io/badge/github-dtolnay/quote-8da0cb?style=for-the-badge&labelColor=555555&logo=github" height="20">](https://github.com/dtolnay/quote)
+[<img alt="crates.io" src="https://img.shields.io/crates/v/quote.svg?style=for-the-badge&color=fc8d62&logo=rust" height="20">](https://crates.io/crates/quote)
+[<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-quote-66c2a5?style=for-the-badge&labelColor=555555&logo=docs.rs" height="20">](https://docs.rs/quote)
+[<img alt="build status" src="https://img.shields.io/github/actions/workflow/status/dtolnay/quote/ci.yml?branch=master&style=for-the-badge" height="20">](https://github.com/dtolnay/quote/actions?query=branch%3Amaster)
+
+This crate provides the [`quote!`] macro for turning Rust syntax tree data
+structures into tokens of source code.
+
+[`quote!`]: https://docs.rs/quote/1.0/quote/macro.quote.html
+
+Procedural macros in Rust receive a stream of tokens as input, execute arbitrary
+Rust code to determine how to manipulate those tokens, and produce a stream of
+tokens to hand back to the compiler to compile into the caller's crate.
+Quasi-quoting is a solution to one piece of that &mdash; producing tokens to
+return to the compiler.
+
+The idea of quasi-quoting is that we write *code* that we treat as *data*.
+Within the `quote!` macro, we can write what looks like code to our text editor
+or IDE. We get all the benefits of the editor's brace matching, syntax
+highlighting, indentation, and maybe autocompletion. But rather than compiling
+that as code into the current crate, we can treat it as data, pass it around,
+mutate it, and eventually hand it back to the compiler as tokens to compile into
+the macro caller's crate.
+
+This crate is motivated by the procedural macro use case, but is a
+general-purpose Rust quasi-quoting library and is not specific to procedural
+macros.
+
+```toml
+[dependencies]
+quote = "1.0"
+```
+
+*Version requirement: Quote supports rustc 1.56 and up.*<br>
+[*Release notes*](https://github.com/dtolnay/quote/releases)
+
+<br>
+
+## Syntax
+
+The quote crate provides a [`quote!`] macro within which you can write Rust code
+that gets packaged into a [`TokenStream`] and can be treated as data. You should
+think of `TokenStream` as representing a fragment of Rust source code.
+
+[`TokenStream`]: https://docs.rs/proc-macro2/1.0/proc_macro2/struct.TokenStream.html
+
+Within the `quote!` macro, interpolation is done with `#var`. Any type
+implementing the [`quote::ToTokens`] trait can be interpolated. This includes
+most Rust primitive types as well as most of the syntax tree types from [`syn`].
+
+[`quote::ToTokens`]: https://docs.rs/quote/1.0/quote/trait.ToTokens.html
+[`syn`]: https://github.com/dtolnay/syn
+
+```rust
+let tokens = quote! {
+ struct SerializeWith #generics #where_clause {
+ value: &'a #field_ty,
+ phantom: core::marker::PhantomData<#item_ty>,
+ }
+
+ impl #generics serde::Serialize for SerializeWith #generics #where_clause {
+ fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+ where
+ S: serde::Serializer,
+ {
+ #path(self.value, serializer)
+ }
+ }
+
+ SerializeWith {
+ value: #value,
+ phantom: core::marker::PhantomData::<#item_ty>,
+ }
+};
+```
+
+<br>
+
+## Repetition
+
+Repetition is done using `#(...)*` or `#(...),*` similar to `macro_rules!`. This
+iterates through the elements of any variable interpolated within the repetition
+and inserts a copy of the repetition body for each one. The variables in an
+interpolation may be anything that implements `IntoIterator`, including `Vec` or
+a pre-existing iterator.
+
+- `#(#var)*` — no separators
+- `#(#var),*` — the character before the asterisk is used as a separator
+- `#( struct #var; )*` — the repetition can contain other things
+- `#( #k => println!("{}", #v), )*` — even multiple interpolations
+
+Note that there is a difference between `#(#var ,)*` and `#(#var),*`—the latter
+does not produce a trailing comma. This matches the behavior of delimiters in
+`macro_rules!`.
+
+<br>
+
+## Returning tokens to the compiler
+
+The `quote!` macro evaluates to an expression of type
+`proc_macro2::TokenStream`. Meanwhile Rust procedural macros are expected to
+return the type `proc_macro::TokenStream`.
+
+The difference between the two types is that `proc_macro` types are entirely
+specific to procedural macros and cannot ever exist in code outside of a
+procedural macro, while `proc_macro2` types may exist anywhere including tests
+and non-macro code like main.rs and build.rs. This is why even the procedural
+macro ecosystem is largely built around `proc_macro2`, because that ensures the
+libraries are unit testable and accessible in non-macro contexts.
+
+There is a [`From`]-conversion in both directions so returning the output of
+`quote!` from a procedural macro usually looks like `tokens.into()` or
+`proc_macro::TokenStream::from(tokens)`.
+
+[`From`]: https://doc.rust-lang.org/std/convert/trait.From.html
+
+<br>
+
+## Examples
+
+### Combining quoted fragments
+
+Usually you don't end up constructing an entire final `TokenStream` in one
+piece. Different parts may come from different helper functions. The tokens
+produced by `quote!` themselves implement `ToTokens` and so can be interpolated
+into later `quote!` invocations to build up a final result.
+
+```rust
+let type_definition = quote! {...};
+let methods = quote! {...};
+
+let tokens = quote! {
+ #type_definition
+ #methods
+};
+```
+
+### Constructing identifiers
+
+Suppose we have an identifier `ident` which came from somewhere in a macro
+input and we need to modify it in some way for the macro output. Let's consider
+prepending the identifier with an underscore.
+
+Simply interpolating the identifier next to an underscore will not have the
+behavior of concatenating them. The underscore and the identifier will continue
+to be two separate tokens as if you had written `_ x`.
+
+```rust
+// incorrect
+quote! {
+ let mut _#ident = 0;
+}
+```
+
+The solution is to build a new identifier token with the correct value. As this
+is such a common case, the `format_ident!` macro provides a convenient utility
+for doing so correctly.
+
+```rust
+let varname = format_ident!("_{}", ident);
+quote! {
+ let mut #varname = 0;
+}
+```
+
+Alternatively, the APIs provided by Syn and proc-macro2 can be used to directly
+build the identifier. This is roughly equivalent to the above, but will not
+handle `ident` being a raw identifier.
+
+```rust
+let concatenated = format!("_{}", ident);
+let varname = syn::Ident::new(&concatenated, ident.span());
+quote! {
+ let mut #varname = 0;
+}
+```
+
+### Making method calls
+
+Let's say our macro requires some type specified in the macro input to have a
+constructor called `new`. We have the type in a variable called `field_type` of
+type `syn::Type` and want to invoke the constructor.
+
+```rust
+// incorrect
+quote! {
+ let value = #field_type::new();
+}
+```
+
+This works only sometimes. If `field_type` is `String`, the expanded code
+contains `String::new()` which is fine. But if `field_type` is something like
+`Vec<i32>` then the expanded code is `Vec<i32>::new()` which is invalid syntax.
+Ordinarily in handwritten Rust we would write `Vec::<i32>::new()` but for macros
+often the following is more convenient.
+
+```rust
+quote! {
+ let value = <#field_type>::new();
+}
+```
+
+This expands to `<Vec<i32>>::new()` which behaves correctly.
+
+A similar pattern is appropriate for trait methods.
+
+```rust
+quote! {
+ let value = <#field_type as core::default::Default>::default();
+}
+```
+
+<br>
+
+## Hygiene
+
+Any interpolated tokens preserve the `Span` information provided by their
+`ToTokens` implementation. Tokens that originate within a `quote!` invocation
+are spanned with [`Span::call_site()`].
+
+[`Span::call_site()`]: https://docs.rs/proc-macro2/1.0/proc_macro2/struct.Span.html#method.call_site
+
+A different span can be provided explicitly through the [`quote_spanned!`]
+macro.
+
+[`quote_spanned!`]: https://docs.rs/quote/1.0/quote/macro.quote_spanned.html
+
+<br>
+
+## Non-macro code generators
+
+When using `quote` in a build.rs or main.rs and writing the output out to a
+file, consider having the code generator pass the tokens through [prettyplease]
+before writing. This way if an error occurs in the generated code it is
+convenient for a human to read and debug.
+
+Be aware that no kind of hygiene or span information is retained when tokens are
+written to a file; the conversion from tokens to source code is lossy.
+
+Example usage in build.rs:
+
+```rust
+let output = quote! { ... };
+let syntax_tree = syn::parse2(output).unwrap();
+let formatted = prettyplease::unparse(&syntax_tree);
+
+let out_dir = env::var_os("OUT_DIR").unwrap();
+let dest_path = Path::new(&out_dir).join("out.rs");
+fs::write(dest_path, formatted).unwrap();
+```
+
+[prettyplease]: https://github.com/dtolnay/prettyplease
+
+<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/quote/rust-toolchain.toml b/third_party/rust/quote/rust-toolchain.toml
new file mode 100644
index 0000000000..20fe888c30
--- /dev/null
+++ b/third_party/rust/quote/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+components = ["rust-src"]
diff --git a/third_party/rust/quote/src/ext.rs b/third_party/rust/quote/src/ext.rs
new file mode 100644
index 0000000000..92c2315b18
--- /dev/null
+++ b/third_party/rust/quote/src/ext.rs
@@ -0,0 +1,110 @@
+use super::ToTokens;
+use core::iter;
+use proc_macro2::{TokenStream, TokenTree};
+
+/// TokenStream extension trait with methods for appending tokens.
+///
+/// This trait is sealed and cannot be implemented outside of the `quote` crate.
+pub trait TokenStreamExt: private::Sealed {
+ /// For use by `ToTokens` implementations.
+ ///
+ /// Appends the token specified to this list of tokens.
+ fn append<U>(&mut self, token: U)
+ where
+ U: Into<TokenTree>;
+
+ /// For use by `ToTokens` implementations.
+ ///
+ /// ```
+ /// # use quote::{quote, TokenStreamExt, ToTokens};
+ /// # use proc_macro2::TokenStream;
+ /// #
+ /// struct X;
+ ///
+ /// impl ToTokens for X {
+ /// fn to_tokens(&self, tokens: &mut TokenStream) {
+ /// tokens.append_all(&[true, false]);
+ /// }
+ /// }
+ ///
+ /// let tokens = quote!(#X);
+ /// assert_eq!(tokens.to_string(), "true false");
+ /// ```
+ fn append_all<I>(&mut self, iter: I)
+ where
+ I: IntoIterator,
+ I::Item: ToTokens;
+
+ /// For use by `ToTokens` implementations.
+ ///
+ /// Appends all of the items in the iterator `I`, separated by the tokens
+ /// `U`.
+ fn append_separated<I, U>(&mut self, iter: I, op: U)
+ where
+ I: IntoIterator,
+ I::Item: ToTokens,
+ U: ToTokens;
+
+ /// For use by `ToTokens` implementations.
+ ///
+ /// Appends all tokens in the iterator `I`, appending `U` after each
+ /// element, including after the last element of the iterator.
+ fn append_terminated<I, U>(&mut self, iter: I, term: U)
+ where
+ I: IntoIterator,
+ I::Item: ToTokens,
+ U: ToTokens;
+}
+
+impl TokenStreamExt for TokenStream {
+ fn append<U>(&mut self, token: U)
+ where
+ U: Into<TokenTree>,
+ {
+ self.extend(iter::once(token.into()));
+ }
+
+ fn append_all<I>(&mut self, iter: I)
+ where
+ I: IntoIterator,
+ I::Item: ToTokens,
+ {
+ for token in iter {
+ token.to_tokens(self);
+ }
+ }
+
+ fn append_separated<I, U>(&mut self, iter: I, op: U)
+ where
+ I: IntoIterator,
+ I::Item: ToTokens,
+ U: ToTokens,
+ {
+ for (i, token) in iter.into_iter().enumerate() {
+ if i > 0 {
+ op.to_tokens(self);
+ }
+ token.to_tokens(self);
+ }
+ }
+
+ fn append_terminated<I, U>(&mut self, iter: I, term: U)
+ where
+ I: IntoIterator,
+ I::Item: ToTokens,
+ U: ToTokens,
+ {
+ for token in iter {
+ token.to_tokens(self);
+ term.to_tokens(self);
+ }
+ }
+}
+
+mod private {
+ use proc_macro2::TokenStream;
+
+ pub trait Sealed {}
+
+ impl Sealed for TokenStream {}
+}
diff --git a/third_party/rust/quote/src/format.rs b/third_party/rust/quote/src/format.rs
new file mode 100644
index 0000000000..3cddbd2819
--- /dev/null
+++ b/third_party/rust/quote/src/format.rs
@@ -0,0 +1,168 @@
+/// Formatting macro for constructing `Ident`s.
+///
+/// <br>
+///
+/// # Syntax
+///
+/// Syntax is copied from the [`format!`] macro, supporting both positional and
+/// named arguments.
+///
+/// Only a limited set of formatting traits are supported. The current mapping
+/// of format types to traits is:
+///
+/// * `{}` ⇒ [`IdentFragment`]
+/// * `{:o}` ⇒ [`Octal`](std::fmt::Octal)
+/// * `{:x}` ⇒ [`LowerHex`](std::fmt::LowerHex)
+/// * `{:X}` ⇒ [`UpperHex`](std::fmt::UpperHex)
+/// * `{:b}` ⇒ [`Binary`](std::fmt::Binary)
+///
+/// See [`std::fmt`] for more information.
+///
+/// <br>
+///
+/// # IdentFragment
+///
+/// Unlike `format!`, this macro uses the [`IdentFragment`] formatting trait by
+/// default. This trait is like `Display`, with a few differences:
+///
+/// * `IdentFragment` is only implemented for a limited set of types, such as
+/// unsigned integers and strings.
+/// * [`Ident`] arguments will have their `r#` prefixes stripped, if present.
+///
+/// [`IdentFragment`]: crate::IdentFragment
+/// [`Ident`]: proc_macro2::Ident
+///
+/// <br>
+///
+/// # Hygiene
+///
+/// The [`Span`] of the first `Ident` argument is used as the span of the final
+/// identifier, falling back to [`Span::call_site`] when no identifiers are
+/// provided.
+///
+/// ```
+/// # use quote::format_ident;
+/// # let ident = format_ident!("Ident");
+/// // If `ident` is an Ident, the span of `my_ident` will be inherited from it.
+/// let my_ident = format_ident!("My{}{}", ident, "IsCool");
+/// assert_eq!(my_ident, "MyIdentIsCool");
+/// ```
+///
+/// Alternatively, the span can be overridden by passing the `span` named
+/// argument.
+///
+/// ```
+/// # use quote::format_ident;
+/// # const IGNORE_TOKENS: &'static str = stringify! {
+/// let my_span = /* ... */;
+/// # };
+/// # let my_span = proc_macro2::Span::call_site();
+/// format_ident!("MyIdent", span = my_span);
+/// ```
+///
+/// [`Span`]: proc_macro2::Span
+/// [`Span::call_site`]: proc_macro2::Span::call_site
+///
+/// <p><br></p>
+///
+/// # Panics
+///
+/// This method will panic if the resulting formatted string is not a valid
+/// identifier.
+///
+/// <br>
+///
+/// # Examples
+///
+/// Composing raw and non-raw identifiers:
+/// ```
+/// # use quote::format_ident;
+/// let my_ident = format_ident!("My{}", "Ident");
+/// assert_eq!(my_ident, "MyIdent");
+///
+/// let raw = format_ident!("r#Raw");
+/// assert_eq!(raw, "r#Raw");
+///
+/// let my_ident_raw = format_ident!("{}Is{}", my_ident, raw);
+/// assert_eq!(my_ident_raw, "MyIdentIsRaw");
+/// ```
+///
+/// Integer formatting options:
+/// ```
+/// # use quote::format_ident;
+/// let num: u32 = 10;
+///
+/// let decimal = format_ident!("Id_{}", num);
+/// assert_eq!(decimal, "Id_10");
+///
+/// let octal = format_ident!("Id_{:o}", num);
+/// assert_eq!(octal, "Id_12");
+///
+/// let binary = format_ident!("Id_{:b}", num);
+/// assert_eq!(binary, "Id_1010");
+///
+/// let lower_hex = format_ident!("Id_{:x}", num);
+/// assert_eq!(lower_hex, "Id_a");
+///
+/// let upper_hex = format_ident!("Id_{:X}", num);
+/// assert_eq!(upper_hex, "Id_A");
+/// ```
+#[macro_export]
+macro_rules! format_ident {
+ ($fmt:expr) => {
+ $crate::format_ident_impl!([
+ $crate::__private::Option::None,
+ $fmt
+ ])
+ };
+
+ ($fmt:expr, $($rest:tt)*) => {
+ $crate::format_ident_impl!([
+ $crate::__private::Option::None,
+ $fmt
+ ] $($rest)*)
+ };
+}
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! format_ident_impl {
+ // Final state
+ ([$span:expr, $($fmt:tt)*]) => {
+ $crate::__private::mk_ident(
+ &$crate::__private::format!($($fmt)*),
+ $span,
+ )
+ };
+
+ // Span argument
+ ([$old:expr, $($fmt:tt)*] span = $span:expr) => {
+ $crate::format_ident_impl!([$old, $($fmt)*] span = $span,)
+ };
+ ([$old:expr, $($fmt:tt)*] span = $span:expr, $($rest:tt)*) => {
+ $crate::format_ident_impl!([
+ $crate::__private::Option::Some::<$crate::__private::Span>($span),
+ $($fmt)*
+ ] $($rest)*)
+ };
+
+ // Named argument
+ ([$span:expr, $($fmt:tt)*] $name:ident = $arg:expr) => {
+ $crate::format_ident_impl!([$span, $($fmt)*] $name = $arg,)
+ };
+ ([$span:expr, $($fmt:tt)*] $name:ident = $arg:expr, $($rest:tt)*) => {
+ match $crate::__private::IdentFragmentAdapter(&$arg) {
+ arg => $crate::format_ident_impl!([$span.or(arg.span()), $($fmt)*, $name = arg] $($rest)*),
+ }
+ };
+
+ // Positional argument
+ ([$span:expr, $($fmt:tt)*] $arg:expr) => {
+ $crate::format_ident_impl!([$span, $($fmt)*] $arg,)
+ };
+ ([$span:expr, $($fmt:tt)*] $arg:expr, $($rest:tt)*) => {
+ match $crate::__private::IdentFragmentAdapter(&$arg) {
+ arg => $crate::format_ident_impl!([$span.or(arg.span()), $($fmt)*, arg] $($rest)*),
+ }
+ };
+}
diff --git a/third_party/rust/quote/src/ident_fragment.rs b/third_party/rust/quote/src/ident_fragment.rs
new file mode 100644
index 0000000000..6c2a9a87ac
--- /dev/null
+++ b/third_party/rust/quote/src/ident_fragment.rs
@@ -0,0 +1,88 @@
+use alloc::borrow::Cow;
+use core::fmt;
+use proc_macro2::{Ident, Span};
+
+/// Specialized formatting trait used by `format_ident!`.
+///
+/// [`Ident`] arguments formatted using this trait will have their `r#` prefix
+/// stripped, if present.
+///
+/// See [`format_ident!`] for more information.
+///
+/// [`format_ident!`]: crate::format_ident
+pub trait IdentFragment {
+ /// Format this value as an identifier fragment.
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result;
+
+ /// Span associated with this `IdentFragment`.
+ ///
+ /// If non-`None`, may be inherited by formatted identifiers.
+ fn span(&self) -> Option<Span> {
+ None
+ }
+}
+
+impl<T: IdentFragment + ?Sized> IdentFragment for &T {
+ fn span(&self) -> Option<Span> {
+ <T as IdentFragment>::span(*self)
+ }
+
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ IdentFragment::fmt(*self, f)
+ }
+}
+
+impl<T: IdentFragment + ?Sized> IdentFragment for &mut T {
+ fn span(&self) -> Option<Span> {
+ <T as IdentFragment>::span(*self)
+ }
+
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ IdentFragment::fmt(*self, f)
+ }
+}
+
+impl IdentFragment for Ident {
+ fn span(&self) -> Option<Span> {
+ Some(self.span())
+ }
+
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ let id = self.to_string();
+ if let Some(id) = id.strip_prefix("r#") {
+ fmt::Display::fmt(id, f)
+ } else {
+ fmt::Display::fmt(&id[..], f)
+ }
+ }
+}
+
+impl<T> IdentFragment for Cow<'_, T>
+where
+ T: IdentFragment + ToOwned + ?Sized,
+{
+ fn span(&self) -> Option<Span> {
+ T::span(self)
+ }
+
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ T::fmt(self, f)
+ }
+}
+
+// Limited set of types which this is implemented for, as we want to avoid types
+// which will often include non-identifier characters in their `Display` impl.
+macro_rules! ident_fragment_display {
+ ($($T:ty),*) => {
+ $(
+ impl IdentFragment for $T {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ fmt::Display::fmt(self, f)
+ }
+ }
+ )*
+ };
+}
+
+ident_fragment_display!(bool, str, String, char);
+ident_fragment_display!(u8, u16, u32, u64, u128, usize);
diff --git a/third_party/rust/quote/src/lib.rs b/third_party/rust/quote/src/lib.rs
new file mode 100644
index 0000000000..8b97abd79d
--- /dev/null
+++ b/third_party/rust/quote/src/lib.rs
@@ -0,0 +1,1444 @@
+//! [![github]](https://github.com/dtolnay/quote)&ensp;[![crates-io]](https://crates.io/crates/quote)&ensp;[![docs-rs]](https://docs.rs/quote)
+//!
+//! [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>
+//!
+//! This crate provides the [`quote!`] macro for turning Rust syntax tree data
+//! structures into tokens of source code.
+//!
+//! [`quote!`]: macro.quote.html
+//!
+//! Procedural macros in Rust receive a stream of tokens as input, execute
+//! arbitrary Rust code to determine how to manipulate those tokens, and produce
+//! a stream of tokens to hand back to the compiler to compile into the caller's
+//! crate. Quasi-quoting is a solution to one piece of that &mdash; producing
+//! tokens to return to the compiler.
+//!
+//! The idea of quasi-quoting is that we write *code* that we treat as *data*.
+//! Within the `quote!` macro, we can write what looks like code to our text
+//! editor or IDE. We get all the benefits of the editor's brace matching,
+//! syntax highlighting, indentation, and maybe autocompletion. But rather than
+//! compiling that as code into the current crate, we can treat it as data, pass
+//! it around, mutate it, and eventually hand it back to the compiler as tokens
+//! to compile into the macro caller's crate.
+//!
+//! This crate is motivated by the procedural macro use case, but is a
+//! general-purpose Rust quasi-quoting library and is not specific to procedural
+//! macros.
+//!
+//! ```toml
+//! [dependencies]
+//! quote = "1.0"
+//! ```
+//!
+//! <br>
+//!
+//! # Example
+//!
+//! The following quasi-quoted block of code is something you might find in [a]
+//! procedural macro having to do with data structure serialization. The `#var`
+//! syntax performs interpolation of runtime variables into the quoted tokens.
+//! Check out the documentation of the [`quote!`] macro for more detail about
+//! the syntax. See also the [`quote_spanned!`] macro which is important for
+//! implementing hygienic procedural macros.
+//!
+//! [a]: https://serde.rs/
+//! [`quote_spanned!`]: macro.quote_spanned.html
+//!
+//! ```
+//! # use quote::quote;
+//! #
+//! # let generics = "";
+//! # let where_clause = "";
+//! # let field_ty = "";
+//! # let item_ty = "";
+//! # let path = "";
+//! # let value = "";
+//! #
+//! let tokens = quote! {
+//! struct SerializeWith #generics #where_clause {
+//! value: &'a #field_ty,
+//! phantom: core::marker::PhantomData<#item_ty>,
+//! }
+//!
+//! impl #generics serde::Serialize for SerializeWith #generics #where_clause {
+//! fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+//! where
+//! S: serde::Serializer,
+//! {
+//! #path(self.value, serializer)
+//! }
+//! }
+//!
+//! SerializeWith {
+//! value: #value,
+//! phantom: core::marker::PhantomData::<#item_ty>,
+//! }
+//! };
+//! ```
+//!
+//! <br>
+//!
+//! # Non-macro code generators
+//!
+//! When using `quote` in a build.rs or main.rs and writing the output out to a
+//! file, consider having the code generator pass the tokens through
+//! [prettyplease] before writing. This way if an error occurs in the generated
+//! code it is convenient for a human to read and debug.
+//!
+//! [prettyplease]: https://github.com/dtolnay/prettyplease
+
+// Quote types in rustdoc of other crates get linked to here.
+#![doc(html_root_url = "https://docs.rs/quote/1.0.35")]
+#![allow(
+ clippy::doc_markdown,
+ clippy::missing_errors_doc,
+ clippy::missing_panics_doc,
+ clippy::module_name_repetitions,
+ // false positive https://github.com/rust-lang/rust-clippy/issues/6983
+ clippy::wrong_self_convention,
+)]
+
+extern crate alloc;
+
+#[cfg(feature = "proc-macro")]
+extern crate proc_macro;
+
+mod ext;
+mod format;
+mod ident_fragment;
+mod to_tokens;
+
+// Not public API.
+#[doc(hidden)]
+#[path = "runtime.rs"]
+pub mod __private;
+
+pub use crate::ext::TokenStreamExt;
+pub use crate::ident_fragment::IdentFragment;
+pub use crate::to_tokens::ToTokens;
+
+// Not public API.
+#[doc(hidden)]
+pub mod spanned;
+
+/// The whole point.
+///
+/// Performs variable interpolation against the input and produces it as
+/// [`proc_macro2::TokenStream`].
+///
+/// Note: for returning tokens to the compiler in a procedural macro, use
+/// `.into()` on the result to convert to [`proc_macro::TokenStream`].
+///
+/// [`TokenStream`]: https://docs.rs/proc-macro2/1.0/proc_macro2/struct.TokenStream.html
+///
+/// <br>
+///
+/// # Interpolation
+///
+/// Variable interpolation is done with `#var` (similar to `$var` in
+/// `macro_rules!` macros). This grabs the `var` variable that is currently in
+/// scope and inserts it in that location in the output tokens. Any type
+/// implementing the [`ToTokens`] trait can be interpolated. This includes most
+/// Rust primitive types as well as most of the syntax tree types from the [Syn]
+/// crate.
+///
+/// [`ToTokens`]: trait.ToTokens.html
+/// [Syn]: https://github.com/dtolnay/syn
+///
+/// Repetition is done using `#(...)*` or `#(...),*` again similar to
+/// `macro_rules!`. This iterates through the elements of any variable
+/// interpolated within the repetition and inserts a copy of the repetition body
+/// for each one. The variables in an interpolation may be a `Vec`, slice,
+/// `BTreeSet`, or any `Iterator`.
+///
+/// - `#(#var)*` — no separators
+/// - `#(#var),*` — the character before the asterisk is used as a separator
+/// - `#( struct #var; )*` — the repetition can contain other tokens
+/// - `#( #k => println!("{}", #v), )*` — even multiple interpolations
+///
+/// <br>
+///
+/// # Hygiene
+///
+/// Any interpolated tokens preserve the `Span` information provided by their
+/// `ToTokens` implementation. Tokens that originate within the `quote!`
+/// invocation are spanned with [`Span::call_site()`].
+///
+/// [`Span::call_site()`]: https://docs.rs/proc-macro2/1.0/proc_macro2/struct.Span.html#method.call_site
+///
+/// A different span can be provided through the [`quote_spanned!`] macro.
+///
+/// [`quote_spanned!`]: macro.quote_spanned.html
+///
+/// <br>
+///
+/// # Return type
+///
+/// The macro evaluates to an expression of type `proc_macro2::TokenStream`.
+/// Meanwhile Rust procedural macros are expected to return the type
+/// `proc_macro::TokenStream`.
+///
+/// The difference between the two types is that `proc_macro` types are entirely
+/// specific to procedural macros and cannot ever exist in code outside of a
+/// procedural macro, while `proc_macro2` types may exist anywhere including
+/// tests and non-macro code like main.rs and build.rs. This is why even the
+/// procedural macro ecosystem is largely built around `proc_macro2`, because
+/// that ensures the libraries are unit testable and accessible in non-macro
+/// contexts.
+///
+/// There is a [`From`]-conversion in both directions so returning the output of
+/// `quote!` from a procedural macro usually looks like `tokens.into()` or
+/// `proc_macro::TokenStream::from(tokens)`.
+///
+/// [`From`]: https://doc.rust-lang.org/std/convert/trait.From.html
+///
+/// <br>
+///
+/// # Examples
+///
+/// ### Procedural macro
+///
+/// The structure of a basic procedural macro is as follows. Refer to the [Syn]
+/// crate for further useful guidance on using `quote!` as part of a procedural
+/// macro.
+///
+/// [Syn]: https://github.com/dtolnay/syn
+///
+/// ```
+/// # #[cfg(any())]
+/// extern crate proc_macro;
+/// # extern crate proc_macro2;
+///
+/// # #[cfg(any())]
+/// use proc_macro::TokenStream;
+/// # use proc_macro2::TokenStream;
+/// use quote::quote;
+///
+/// # const IGNORE_TOKENS: &'static str = stringify! {
+/// #[proc_macro_derive(HeapSize)]
+/// # };
+/// pub fn derive_heap_size(input: TokenStream) -> TokenStream {
+/// // Parse the input and figure out what implementation to generate...
+/// # const IGNORE_TOKENS: &'static str = stringify! {
+/// let name = /* ... */;
+/// let expr = /* ... */;
+/// # };
+/// #
+/// # let name = 0;
+/// # let expr = 0;
+///
+/// let expanded = quote! {
+/// // The generated impl.
+/// impl heapsize::HeapSize for #name {
+/// fn heap_size_of_children(&self) -> usize {
+/// #expr
+/// }
+/// }
+/// };
+///
+/// // Hand the output tokens back to the compiler.
+/// TokenStream::from(expanded)
+/// }
+/// ```
+///
+/// <p><br></p>
+///
+/// ### Combining quoted fragments
+///
+/// Usually you don't end up constructing an entire final `TokenStream` in one
+/// piece. Different parts may come from different helper functions. The tokens
+/// produced by `quote!` themselves implement `ToTokens` and so can be
+/// interpolated into later `quote!` invocations to build up a final result.
+///
+/// ```
+/// # use quote::quote;
+/// #
+/// let type_definition = quote! {...};
+/// let methods = quote! {...};
+///
+/// let tokens = quote! {
+/// #type_definition
+/// #methods
+/// };
+/// ```
+///
+/// <p><br></p>
+///
+/// ### Constructing identifiers
+///
+/// Suppose we have an identifier `ident` which came from somewhere in a macro
+/// input and we need to modify it in some way for the macro output. Let's
+/// consider prepending the identifier with an underscore.
+///
+/// Simply interpolating the identifier next to an underscore will not have the
+/// behavior of concatenating them. The underscore and the identifier will
+/// continue to be two separate tokens as if you had written `_ x`.
+///
+/// ```
+/// # use proc_macro2::{self as syn, Span};
+/// # use quote::quote;
+/// #
+/// # let ident = syn::Ident::new("i", Span::call_site());
+/// #
+/// // incorrect
+/// quote! {
+/// let mut _#ident = 0;
+/// }
+/// # ;
+/// ```
+///
+/// The solution is to build a new identifier token with the correct value. As
+/// this is such a common case, the [`format_ident!`] macro provides a
+/// convenient utility for doing so correctly.
+///
+/// ```
+/// # use proc_macro2::{Ident, Span};
+/// # use quote::{format_ident, quote};
+/// #
+/// # let ident = Ident::new("i", Span::call_site());
+/// #
+/// let varname = format_ident!("_{}", ident);
+/// quote! {
+/// let mut #varname = 0;
+/// }
+/// # ;
+/// ```
+///
+/// Alternatively, the APIs provided by Syn and proc-macro2 can be used to
+/// directly build the identifier. This is roughly equivalent to the above, but
+/// will not handle `ident` being a raw identifier.
+///
+/// ```
+/// # use proc_macro2::{self as syn, Span};
+/// # use quote::quote;
+/// #
+/// # let ident = syn::Ident::new("i", Span::call_site());
+/// #
+/// let concatenated = format!("_{}", ident);
+/// let varname = syn::Ident::new(&concatenated, ident.span());
+/// quote! {
+/// let mut #varname = 0;
+/// }
+/// # ;
+/// ```
+///
+/// <p><br></p>
+///
+/// ### Making method calls
+///
+/// Let's say our macro requires some type specified in the macro input to have
+/// a constructor called `new`. We have the type in a variable called
+/// `field_type` of type `syn::Type` and want to invoke the constructor.
+///
+/// ```
+/// # use quote::quote;
+/// #
+/// # let field_type = quote!(...);
+/// #
+/// // incorrect
+/// quote! {
+/// let value = #field_type::new();
+/// }
+/// # ;
+/// ```
+///
+/// This works only sometimes. If `field_type` is `String`, the expanded code
+/// contains `String::new()` which is fine. But if `field_type` is something
+/// like `Vec<i32>` then the expanded code is `Vec<i32>::new()` which is invalid
+/// syntax. Ordinarily in handwritten Rust we would write `Vec::<i32>::new()`
+/// but for macros often the following is more convenient.
+///
+/// ```
+/// # use quote::quote;
+/// #
+/// # let field_type = quote!(...);
+/// #
+/// quote! {
+/// let value = <#field_type>::new();
+/// }
+/// # ;
+/// ```
+///
+/// This expands to `<Vec<i32>>::new()` which behaves correctly.
+///
+/// A similar pattern is appropriate for trait methods.
+///
+/// ```
+/// # use quote::quote;
+/// #
+/// # let field_type = quote!(...);
+/// #
+/// quote! {
+/// let value = <#field_type as core::default::Default>::default();
+/// }
+/// # ;
+/// ```
+///
+/// <p><br></p>
+///
+/// ### Interpolating text inside of doc comments
+///
+/// Neither doc comments nor string literals get interpolation behavior in
+/// quote:
+///
+/// ```compile_fail
+/// quote! {
+/// /// try to interpolate: #ident
+/// ///
+/// /// ...
+/// }
+/// ```
+///
+/// ```compile_fail
+/// quote! {
+/// #[doc = "try to interpolate: #ident"]
+/// }
+/// ```
+///
+/// Instead the best way to build doc comments that involve variables is by
+/// formatting the doc string literal outside of quote.
+///
+/// ```rust
+/// # use proc_macro2::{Ident, Span};
+/// # use quote::quote;
+/// #
+/// # const IGNORE: &str = stringify! {
+/// let msg = format!(...);
+/// # };
+/// #
+/// # let ident = Ident::new("var", Span::call_site());
+/// # let msg = format!("try to interpolate: {}", ident);
+/// quote! {
+/// #[doc = #msg]
+/// ///
+/// /// ...
+/// }
+/// # ;
+/// ```
+///
+/// <p><br></p>
+///
+/// ### Indexing into a tuple struct
+///
+/// When interpolating indices of a tuple or tuple struct, we need them not to
+/// appears suffixed as integer literals by interpolating them as [`syn::Index`]
+/// instead.
+///
+/// [`syn::Index`]: https://docs.rs/syn/2.0/syn/struct.Index.html
+///
+/// ```compile_fail
+/// let i = 0usize..self.fields.len();
+///
+/// // expands to 0 + self.0usize.heap_size() + self.1usize.heap_size() + ...
+/// // which is not valid syntax
+/// quote! {
+/// 0 #( + self.#i.heap_size() )*
+/// }
+/// ```
+///
+/// ```
+/// # use proc_macro2::{Ident, TokenStream};
+/// # use quote::quote;
+/// #
+/// # mod syn {
+/// # use proc_macro2::{Literal, TokenStream};
+/// # use quote::{ToTokens, TokenStreamExt};
+/// #
+/// # pub struct Index(usize);
+/// #
+/// # impl From<usize> for Index {
+/// # fn from(i: usize) -> Self {
+/// # Index(i)
+/// # }
+/// # }
+/// #
+/// # impl ToTokens for Index {
+/// # fn to_tokens(&self, tokens: &mut TokenStream) {
+/// # tokens.append(Literal::usize_unsuffixed(self.0));
+/// # }
+/// # }
+/// # }
+/// #
+/// # struct Struct {
+/// # fields: Vec<Ident>,
+/// # }
+/// #
+/// # impl Struct {
+/// # fn example(&self) -> TokenStream {
+/// let i = (0..self.fields.len()).map(syn::Index::from);
+///
+/// // expands to 0 + self.0.heap_size() + self.1.heap_size() + ...
+/// quote! {
+/// 0 #( + self.#i.heap_size() )*
+/// }
+/// # }
+/// # }
+/// ```
+#[cfg(doc)]
+#[macro_export]
+macro_rules! quote {
+ ($($tt:tt)*) => {
+ ...
+ };
+}
+
+#[cfg(not(doc))]
+#[macro_export]
+macro_rules! quote {
+ () => {
+ $crate::__private::TokenStream::new()
+ };
+
+ // Special case rule for a single tt, for performance.
+ ($tt:tt) => {{
+ let mut _s = $crate::__private::TokenStream::new();
+ $crate::quote_token!{$tt _s}
+ _s
+ }};
+
+ // Special case rules for two tts, for performance.
+ (# $var:ident) => {{
+ let mut _s = $crate::__private::TokenStream::new();
+ $crate::ToTokens::to_tokens(&$var, &mut _s);
+ _s
+ }};
+ ($tt1:tt $tt2:tt) => {{
+ let mut _s = $crate::__private::TokenStream::new();
+ $crate::quote_token!{$tt1 _s}
+ $crate::quote_token!{$tt2 _s}
+ _s
+ }};
+
+ // Rule for any other number of tokens.
+ ($($tt:tt)*) => {{
+ let mut _s = $crate::__private::TokenStream::new();
+ $crate::quote_each_token!{_s $($tt)*}
+ _s
+ }};
+}
+
+/// Same as `quote!`, but applies a given span to all tokens originating within
+/// the macro invocation.
+///
+/// <br>
+///
+/// # Syntax
+///
+/// A span expression of type [`Span`], followed by `=>`, followed by the tokens
+/// to quote. The span expression should be brief &mdash; use a variable for
+/// anything more than a few characters. There should be no space before the
+/// `=>` token.
+///
+/// [`Span`]: https://docs.rs/proc-macro2/1.0/proc_macro2/struct.Span.html
+///
+/// ```
+/// # use proc_macro2::Span;
+/// # use quote::quote_spanned;
+/// #
+/// # const IGNORE_TOKENS: &'static str = stringify! {
+/// let span = /* ... */;
+/// # };
+/// # let span = Span::call_site();
+/// # let init = 0;
+///
+/// // On one line, use parentheses.
+/// let tokens = quote_spanned!(span=> Box::into_raw(Box::new(#init)));
+///
+/// // On multiple lines, place the span at the top and use braces.
+/// let tokens = quote_spanned! {span=>
+/// Box::into_raw(Box::new(#init))
+/// };
+/// ```
+///
+/// The lack of space before the `=>` should look jarring to Rust programmers
+/// and this is intentional. The formatting is designed to be visibly
+/// off-balance and draw the eye a particular way, due to the span expression
+/// being evaluated in the context of the procedural macro and the remaining
+/// tokens being evaluated in the generated code.
+///
+/// <br>
+///
+/// # Hygiene
+///
+/// Any interpolated tokens preserve the `Span` information provided by their
+/// `ToTokens` implementation. Tokens that originate within the `quote_spanned!`
+/// invocation are spanned with the given span argument.
+///
+/// <br>
+///
+/// # Example
+///
+/// The following procedural macro code uses `quote_spanned!` to assert that a
+/// particular Rust type implements the [`Sync`] trait so that references can be
+/// safely shared between threads.
+///
+/// [`Sync`]: https://doc.rust-lang.org/std/marker/trait.Sync.html
+///
+/// ```
+/// # use quote::{quote_spanned, TokenStreamExt, ToTokens};
+/// # use proc_macro2::{Span, TokenStream};
+/// #
+/// # struct Type;
+/// #
+/// # impl Type {
+/// # fn span(&self) -> Span {
+/// # Span::call_site()
+/// # }
+/// # }
+/// #
+/// # impl ToTokens for Type {
+/// # fn to_tokens(&self, _tokens: &mut TokenStream) {}
+/// # }
+/// #
+/// # let ty = Type;
+/// # let call_site = Span::call_site();
+/// #
+/// let ty_span = ty.span();
+/// let assert_sync = quote_spanned! {ty_span=>
+/// struct _AssertSync where #ty: Sync;
+/// };
+/// ```
+///
+/// If the assertion fails, the user will see an error like the following. The
+/// input span of their type is highlighted in the error.
+///
+/// ```text
+/// error[E0277]: the trait bound `*const (): std::marker::Sync` is not satisfied
+/// --> src/main.rs:10:21
+/// |
+/// 10 | static ref PTR: *const () = &();
+/// | ^^^^^^^^^ `*const ()` cannot be shared between threads safely
+/// ```
+///
+/// In this example it is important for the where-clause to be spanned with the
+/// line/column information of the user's input type so that error messages are
+/// placed appropriately by the compiler.
+#[cfg(doc)]
+#[macro_export]
+macro_rules! quote_spanned {
+ ($span:expr=> $($tt:tt)*) => {
+ ...
+ };
+}
+
+#[cfg(not(doc))]
+#[macro_export]
+macro_rules! quote_spanned {
+ ($span:expr=>) => {{
+ let _: $crate::__private::Span = $crate::__private::get_span($span).__into_span();
+ $crate::__private::TokenStream::new()
+ }};
+
+ // Special case rule for a single tt, for performance.
+ ($span:expr=> $tt:tt) => {{
+ let mut _s = $crate::__private::TokenStream::new();
+ let _span: $crate::__private::Span = $crate::__private::get_span($span).__into_span();
+ $crate::quote_token_spanned!{$tt _s _span}
+ _s
+ }};
+
+ // Special case rules for two tts, for performance.
+ ($span:expr=> # $var:ident) => {{
+ let mut _s = $crate::__private::TokenStream::new();
+ let _: $crate::__private::Span = $crate::__private::get_span($span).__into_span();
+ $crate::ToTokens::to_tokens(&$var, &mut _s);
+ _s
+ }};
+ ($span:expr=> $tt1:tt $tt2:tt) => {{
+ let mut _s = $crate::__private::TokenStream::new();
+ let _span: $crate::__private::Span = $crate::__private::get_span($span).__into_span();
+ $crate::quote_token_spanned!{$tt1 _s _span}
+ $crate::quote_token_spanned!{$tt2 _s _span}
+ _s
+ }};
+
+ // Rule for any other number of tokens.
+ ($span:expr=> $($tt:tt)*) => {{
+ let mut _s = $crate::__private::TokenStream::new();
+ let _span: $crate::__private::Span = $crate::__private::get_span($span).__into_span();
+ $crate::quote_each_token_spanned!{_s _span $($tt)*}
+ _s
+ }};
+}
+
+// Extract the names of all #metavariables and pass them to the $call macro.
+//
+// in: pounded_var_names!(then!(...) a #b c #( #d )* #e)
+// out: then!(... b);
+// then!(... d);
+// then!(... e);
+#[macro_export]
+#[doc(hidden)]
+macro_rules! pounded_var_names {
+ ($call:ident! $extra:tt $($tts:tt)*) => {
+ $crate::pounded_var_names_with_context!{$call! $extra
+ (@ $($tts)*)
+ ($($tts)* @)
+ }
+ };
+}
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! pounded_var_names_with_context {
+ ($call:ident! $extra:tt ($($b1:tt)*) ($($curr:tt)*)) => {
+ $(
+ $crate::pounded_var_with_context!{$call! $extra $b1 $curr}
+ )*
+ };
+}
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! pounded_var_with_context {
+ ($call:ident! $extra:tt $b1:tt ( $($inner:tt)* )) => {
+ $crate::pounded_var_names!{$call! $extra $($inner)*}
+ };
+
+ ($call:ident! $extra:tt $b1:tt [ $($inner:tt)* ]) => {
+ $crate::pounded_var_names!{$call! $extra $($inner)*}
+ };
+
+ ($call:ident! $extra:tt $b1:tt { $($inner:tt)* }) => {
+ $crate::pounded_var_names!{$call! $extra $($inner)*}
+ };
+
+ ($call:ident!($($extra:tt)*) # $var:ident) => {
+ $crate::$call!($($extra)* $var);
+ };
+
+ ($call:ident! $extra:tt $b1:tt $curr:tt) => {};
+}
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! quote_bind_into_iter {
+ ($has_iter:ident $var:ident) => {
+ // `mut` may be unused if $var occurs multiple times in the list.
+ #[allow(unused_mut)]
+ let (mut $var, i) = $var.quote_into_iter();
+ let $has_iter = $has_iter | i;
+ };
+}
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! quote_bind_next_or_break {
+ ($var:ident) => {
+ let $var = match $var.next() {
+ Some(_x) => $crate::__private::RepInterp(_x),
+ None => break,
+ };
+ };
+}
+
+// The obvious way to write this macro is as a tt muncher. This implementation
+// does something more complex for two reasons.
+//
+// - With a tt muncher it's easy to hit Rust's built-in recursion_limit, which
+// this implementation avoids because it isn't tail recursive.
+//
+// - Compile times for a tt muncher are quadratic relative to the length of
+// the input. This implementation is linear, so it will be faster
+// (potentially much faster) for big inputs. However, the constant factors
+// of this implementation are higher than that of a tt muncher, so it is
+// somewhat slower than a tt muncher if there are many invocations with
+// short inputs.
+//
+// An invocation like this:
+//
+// quote_each_token!(_s a b c d e f g h i j);
+//
+// expands to this:
+//
+// quote_tokens_with_context!(_s
+// (@ @ @ @ @ @ a b c d e f g h i j)
+// (@ @ @ @ @ a b c d e f g h i j @)
+// (@ @ @ @ a b c d e f g h i j @ @)
+// (@ @ @ (a) (b) (c) (d) (e) (f) (g) (h) (i) (j) @ @ @)
+// (@ @ a b c d e f g h i j @ @ @ @)
+// (@ a b c d e f g h i j @ @ @ @ @)
+// (a b c d e f g h i j @ @ @ @ @ @)
+// );
+//
+// which gets transposed and expanded to this:
+//
+// quote_token_with_context!(_s @ @ @ @ @ @ a);
+// quote_token_with_context!(_s @ @ @ @ @ a b);
+// quote_token_with_context!(_s @ @ @ @ a b c);
+// quote_token_with_context!(_s @ @ @ (a) b c d);
+// quote_token_with_context!(_s @ @ a (b) c d e);
+// quote_token_with_context!(_s @ a b (c) d e f);
+// quote_token_with_context!(_s a b c (d) e f g);
+// quote_token_with_context!(_s b c d (e) f g h);
+// quote_token_with_context!(_s c d e (f) g h i);
+// quote_token_with_context!(_s d e f (g) h i j);
+// quote_token_with_context!(_s e f g (h) i j @);
+// quote_token_with_context!(_s f g h (i) j @ @);
+// quote_token_with_context!(_s g h i (j) @ @ @);
+// quote_token_with_context!(_s h i j @ @ @ @);
+// quote_token_with_context!(_s i j @ @ @ @ @);
+// quote_token_with_context!(_s j @ @ @ @ @ @);
+//
+// Without having used muncher-style recursion, we get one invocation of
+// quote_token_with_context for each original tt, with three tts of context on
+// either side. This is enough for the longest possible interpolation form (a
+// repetition with separator, as in `# (#var) , *`) to be fully represented with
+// the first or last tt in the middle.
+//
+// The middle tt (surrounded by parentheses) is the tt being processed.
+//
+// - When it is a `#`, quote_token_with_context can do an interpolation. The
+// interpolation kind will depend on the three subsequent tts.
+//
+// - When it is within a later part of an interpolation, it can be ignored
+// because the interpolation has already been done.
+//
+// - When it is not part of an interpolation it can be pushed as a single
+// token into the output.
+//
+// - When the middle token is an unparenthesized `@`, that call is one of the
+// first 3 or last 3 calls of quote_token_with_context and does not
+// correspond to one of the original input tokens, so turns into nothing.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! quote_each_token {
+ ($tokens:ident $($tts:tt)*) => {
+ $crate::quote_tokens_with_context!{$tokens
+ (@ @ @ @ @ @ $($tts)*)
+ (@ @ @ @ @ $($tts)* @)
+ (@ @ @ @ $($tts)* @ @)
+ (@ @ @ $(($tts))* @ @ @)
+ (@ @ $($tts)* @ @ @ @)
+ (@ $($tts)* @ @ @ @ @)
+ ($($tts)* @ @ @ @ @ @)
+ }
+ };
+}
+
+// See the explanation on quote_each_token.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! quote_each_token_spanned {
+ ($tokens:ident $span:ident $($tts:tt)*) => {
+ $crate::quote_tokens_with_context_spanned!{$tokens $span
+ (@ @ @ @ @ @ $($tts)*)
+ (@ @ @ @ @ $($tts)* @)
+ (@ @ @ @ $($tts)* @ @)
+ (@ @ @ $(($tts))* @ @ @)
+ (@ @ $($tts)* @ @ @ @)
+ (@ $($tts)* @ @ @ @ @)
+ ($($tts)* @ @ @ @ @ @)
+ }
+ };
+}
+
+// See the explanation on quote_each_token.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! quote_tokens_with_context {
+ ($tokens:ident
+ ($($b3:tt)*) ($($b2:tt)*) ($($b1:tt)*)
+ ($($curr:tt)*)
+ ($($a1:tt)*) ($($a2:tt)*) ($($a3:tt)*)
+ ) => {
+ $(
+ $crate::quote_token_with_context!{$tokens $b3 $b2 $b1 $curr $a1 $a2 $a3}
+ )*
+ };
+}
+
+// See the explanation on quote_each_token.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! quote_tokens_with_context_spanned {
+ ($tokens:ident $span:ident
+ ($($b3:tt)*) ($($b2:tt)*) ($($b1:tt)*)
+ ($($curr:tt)*)
+ ($($a1:tt)*) ($($a2:tt)*) ($($a3:tt)*)
+ ) => {
+ $(
+ $crate::quote_token_with_context_spanned!{$tokens $span $b3 $b2 $b1 $curr $a1 $a2 $a3}
+ )*
+ };
+}
+
+// See the explanation on quote_each_token.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! quote_token_with_context {
+ // Unparenthesized `@` indicates this call does not correspond to one of the
+ // original input tokens. Ignore it.
+ ($tokens:ident $b3:tt $b2:tt $b1:tt @ $a1:tt $a2:tt $a3:tt) => {};
+
+ // A repetition with no separator.
+ ($tokens:ident $b3:tt $b2:tt $b1:tt (#) ( $($inner:tt)* ) * $a3:tt) => {{
+ use $crate::__private::ext::*;
+ let has_iter = $crate::__private::ThereIsNoIteratorInRepetition;
+ $crate::pounded_var_names!{quote_bind_into_iter!(has_iter) () $($inner)*}
+ let _: $crate::__private::HasIterator = has_iter;
+ // This is `while true` instead of `loop` because if there are no
+ // iterators used inside of this repetition then the body would not
+ // contain any `break`, so the compiler would emit unreachable code
+ // warnings on anything below the loop. We use has_iter to detect and
+ // fail to compile when there are no iterators, so here we just work
+ // around the unneeded extra warning.
+ while true {
+ $crate::pounded_var_names!{quote_bind_next_or_break!() () $($inner)*}
+ $crate::quote_each_token!{$tokens $($inner)*}
+ }
+ }};
+ // ... and one step later.
+ ($tokens:ident $b3:tt $b2:tt # (( $($inner:tt)* )) * $a2:tt $a3:tt) => {};
+ // ... and one step later.
+ ($tokens:ident $b3:tt # ( $($inner:tt)* ) (*) $a1:tt $a2:tt $a3:tt) => {};
+
+ // A repetition with separator.
+ ($tokens:ident $b3:tt $b2:tt $b1:tt (#) ( $($inner:tt)* ) $sep:tt *) => {{
+ use $crate::__private::ext::*;
+ let mut _i = 0usize;
+ let has_iter = $crate::__private::ThereIsNoIteratorInRepetition;
+ $crate::pounded_var_names!{quote_bind_into_iter!(has_iter) () $($inner)*}
+ let _: $crate::__private::HasIterator = has_iter;
+ while true {
+ $crate::pounded_var_names!{quote_bind_next_or_break!() () $($inner)*}
+ if _i > 0 {
+ $crate::quote_token!{$sep $tokens}
+ }
+ _i += 1;
+ $crate::quote_each_token!{$tokens $($inner)*}
+ }
+ }};
+ // ... and one step later.
+ ($tokens:ident $b3:tt $b2:tt # (( $($inner:tt)* )) $sep:tt * $a3:tt) => {};
+ // ... and one step later.
+ ($tokens:ident $b3:tt # ( $($inner:tt)* ) ($sep:tt) * $a2:tt $a3:tt) => {};
+ // (A special case for `#(var)**`, where the first `*` is treated as the
+ // repetition symbol and the second `*` is treated as an ordinary token.)
+ ($tokens:ident # ( $($inner:tt)* ) * (*) $a1:tt $a2:tt $a3:tt) => {
+ // https://github.com/dtolnay/quote/issues/130
+ $crate::quote_token!{* $tokens}
+ };
+ // ... and one step later.
+ ($tokens:ident # ( $($inner:tt)* ) $sep:tt (*) $a1:tt $a2:tt $a3:tt) => {};
+
+ // A non-repetition interpolation.
+ ($tokens:ident $b3:tt $b2:tt $b1:tt (#) $var:ident $a2:tt $a3:tt) => {
+ $crate::ToTokens::to_tokens(&$var, &mut $tokens);
+ };
+ // ... and one step later.
+ ($tokens:ident $b3:tt $b2:tt # ($var:ident) $a1:tt $a2:tt $a3:tt) => {};
+
+ // An ordinary token, not part of any interpolation.
+ ($tokens:ident $b3:tt $b2:tt $b1:tt ($curr:tt) $a1:tt $a2:tt $a3:tt) => {
+ $crate::quote_token!{$curr $tokens}
+ };
+}
+
+// See the explanation on quote_each_token, and on the individual rules of
+// quote_token_with_context.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! quote_token_with_context_spanned {
+ ($tokens:ident $span:ident $b3:tt $b2:tt $b1:tt @ $a1:tt $a2:tt $a3:tt) => {};
+
+ ($tokens:ident $span:ident $b3:tt $b2:tt $b1:tt (#) ( $($inner:tt)* ) * $a3:tt) => {{
+ use $crate::__private::ext::*;
+ let has_iter = $crate::__private::ThereIsNoIteratorInRepetition;
+ $crate::pounded_var_names!{quote_bind_into_iter!(has_iter) () $($inner)*}
+ let _: $crate::__private::HasIterator = has_iter;
+ while true {
+ $crate::pounded_var_names!{quote_bind_next_or_break!() () $($inner)*}
+ $crate::quote_each_token_spanned!{$tokens $span $($inner)*}
+ }
+ }};
+ ($tokens:ident $span:ident $b3:tt $b2:tt # (( $($inner:tt)* )) * $a2:tt $a3:tt) => {};
+ ($tokens:ident $span:ident $b3:tt # ( $($inner:tt)* ) (*) $a1:tt $a2:tt $a3:tt) => {};
+
+ ($tokens:ident $span:ident $b3:tt $b2:tt $b1:tt (#) ( $($inner:tt)* ) $sep:tt *) => {{
+ use $crate::__private::ext::*;
+ let mut _i = 0usize;
+ let has_iter = $crate::__private::ThereIsNoIteratorInRepetition;
+ $crate::pounded_var_names!{quote_bind_into_iter!(has_iter) () $($inner)*}
+ let _: $crate::__private::HasIterator = has_iter;
+ while true {
+ $crate::pounded_var_names!{quote_bind_next_or_break!() () $($inner)*}
+ if _i > 0 {
+ $crate::quote_token_spanned!{$sep $tokens $span}
+ }
+ _i += 1;
+ $crate::quote_each_token_spanned!{$tokens $span $($inner)*}
+ }
+ }};
+ ($tokens:ident $span:ident $b3:tt $b2:tt # (( $($inner:tt)* )) $sep:tt * $a3:tt) => {};
+ ($tokens:ident $span:ident $b3:tt # ( $($inner:tt)* ) ($sep:tt) * $a2:tt $a3:tt) => {};
+ ($tokens:ident $span:ident # ( $($inner:tt)* ) * (*) $a1:tt $a2:tt $a3:tt) => {
+ // https://github.com/dtolnay/quote/issues/130
+ $crate::quote_token_spanned!{* $tokens $span}
+ };
+ ($tokens:ident $span:ident # ( $($inner:tt)* ) $sep:tt (*) $a1:tt $a2:tt $a3:tt) => {};
+
+ ($tokens:ident $span:ident $b3:tt $b2:tt $b1:tt (#) $var:ident $a2:tt $a3:tt) => {
+ $crate::ToTokens::to_tokens(&$var, &mut $tokens);
+ };
+ ($tokens:ident $span:ident $b3:tt $b2:tt # ($var:ident) $a1:tt $a2:tt $a3:tt) => {};
+
+ ($tokens:ident $span:ident $b3:tt $b2:tt $b1:tt ($curr:tt) $a1:tt $a2:tt $a3:tt) => {
+ $crate::quote_token_spanned!{$curr $tokens $span}
+ };
+}
+
+// These rules are ordered by approximate token frequency, at least for the
+// first 10 or so, to improve compile times. Having `ident` first is by far the
+// most important because it's typically 2-3x more common than the next most
+// common token.
+//
+// Separately, we put the token being matched in the very front so that failing
+// rules may fail to match as quickly as possible.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! quote_token {
+ ($ident:ident $tokens:ident) => {
+ $crate::__private::push_ident(&mut $tokens, stringify!($ident));
+ };
+
+ (:: $tokens:ident) => {
+ $crate::__private::push_colon2(&mut $tokens);
+ };
+
+ (( $($inner:tt)* ) $tokens:ident) => {
+ $crate::__private::push_group(
+ &mut $tokens,
+ $crate::__private::Delimiter::Parenthesis,
+ $crate::quote!($($inner)*),
+ );
+ };
+
+ ([ $($inner:tt)* ] $tokens:ident) => {
+ $crate::__private::push_group(
+ &mut $tokens,
+ $crate::__private::Delimiter::Bracket,
+ $crate::quote!($($inner)*),
+ );
+ };
+
+ ({ $($inner:tt)* } $tokens:ident) => {
+ $crate::__private::push_group(
+ &mut $tokens,
+ $crate::__private::Delimiter::Brace,
+ $crate::quote!($($inner)*),
+ );
+ };
+
+ (# $tokens:ident) => {
+ $crate::__private::push_pound(&mut $tokens);
+ };
+
+ (, $tokens:ident) => {
+ $crate::__private::push_comma(&mut $tokens);
+ };
+
+ (. $tokens:ident) => {
+ $crate::__private::push_dot(&mut $tokens);
+ };
+
+ (; $tokens:ident) => {
+ $crate::__private::push_semi(&mut $tokens);
+ };
+
+ (: $tokens:ident) => {
+ $crate::__private::push_colon(&mut $tokens);
+ };
+
+ (+ $tokens:ident) => {
+ $crate::__private::push_add(&mut $tokens);
+ };
+
+ (+= $tokens:ident) => {
+ $crate::__private::push_add_eq(&mut $tokens);
+ };
+
+ (& $tokens:ident) => {
+ $crate::__private::push_and(&mut $tokens);
+ };
+
+ (&& $tokens:ident) => {
+ $crate::__private::push_and_and(&mut $tokens);
+ };
+
+ (&= $tokens:ident) => {
+ $crate::__private::push_and_eq(&mut $tokens);
+ };
+
+ (@ $tokens:ident) => {
+ $crate::__private::push_at(&mut $tokens);
+ };
+
+ (! $tokens:ident) => {
+ $crate::__private::push_bang(&mut $tokens);
+ };
+
+ (^ $tokens:ident) => {
+ $crate::__private::push_caret(&mut $tokens);
+ };
+
+ (^= $tokens:ident) => {
+ $crate::__private::push_caret_eq(&mut $tokens);
+ };
+
+ (/ $tokens:ident) => {
+ $crate::__private::push_div(&mut $tokens);
+ };
+
+ (/= $tokens:ident) => {
+ $crate::__private::push_div_eq(&mut $tokens);
+ };
+
+ (.. $tokens:ident) => {
+ $crate::__private::push_dot2(&mut $tokens);
+ };
+
+ (... $tokens:ident) => {
+ $crate::__private::push_dot3(&mut $tokens);
+ };
+
+ (..= $tokens:ident) => {
+ $crate::__private::push_dot_dot_eq(&mut $tokens);
+ };
+
+ (= $tokens:ident) => {
+ $crate::__private::push_eq(&mut $tokens);
+ };
+
+ (== $tokens:ident) => {
+ $crate::__private::push_eq_eq(&mut $tokens);
+ };
+
+ (>= $tokens:ident) => {
+ $crate::__private::push_ge(&mut $tokens);
+ };
+
+ (> $tokens:ident) => {
+ $crate::__private::push_gt(&mut $tokens);
+ };
+
+ (<= $tokens:ident) => {
+ $crate::__private::push_le(&mut $tokens);
+ };
+
+ (< $tokens:ident) => {
+ $crate::__private::push_lt(&mut $tokens);
+ };
+
+ (*= $tokens:ident) => {
+ $crate::__private::push_mul_eq(&mut $tokens);
+ };
+
+ (!= $tokens:ident) => {
+ $crate::__private::push_ne(&mut $tokens);
+ };
+
+ (| $tokens:ident) => {
+ $crate::__private::push_or(&mut $tokens);
+ };
+
+ (|= $tokens:ident) => {
+ $crate::__private::push_or_eq(&mut $tokens);
+ };
+
+ (|| $tokens:ident) => {
+ $crate::__private::push_or_or(&mut $tokens);
+ };
+
+ (? $tokens:ident) => {
+ $crate::__private::push_question(&mut $tokens);
+ };
+
+ (-> $tokens:ident) => {
+ $crate::__private::push_rarrow(&mut $tokens);
+ };
+
+ (<- $tokens:ident) => {
+ $crate::__private::push_larrow(&mut $tokens);
+ };
+
+ (% $tokens:ident) => {
+ $crate::__private::push_rem(&mut $tokens);
+ };
+
+ (%= $tokens:ident) => {
+ $crate::__private::push_rem_eq(&mut $tokens);
+ };
+
+ (=> $tokens:ident) => {
+ $crate::__private::push_fat_arrow(&mut $tokens);
+ };
+
+ (<< $tokens:ident) => {
+ $crate::__private::push_shl(&mut $tokens);
+ };
+
+ (<<= $tokens:ident) => {
+ $crate::__private::push_shl_eq(&mut $tokens);
+ };
+
+ (>> $tokens:ident) => {
+ $crate::__private::push_shr(&mut $tokens);
+ };
+
+ (>>= $tokens:ident) => {
+ $crate::__private::push_shr_eq(&mut $tokens);
+ };
+
+ (* $tokens:ident) => {
+ $crate::__private::push_star(&mut $tokens);
+ };
+
+ (- $tokens:ident) => {
+ $crate::__private::push_sub(&mut $tokens);
+ };
+
+ (-= $tokens:ident) => {
+ $crate::__private::push_sub_eq(&mut $tokens);
+ };
+
+ ($lifetime:lifetime $tokens:ident) => {
+ $crate::__private::push_lifetime(&mut $tokens, stringify!($lifetime));
+ };
+
+ (_ $tokens:ident) => {
+ $crate::__private::push_underscore(&mut $tokens);
+ };
+
+ ($other:tt $tokens:ident) => {
+ $crate::__private::parse(&mut $tokens, stringify!($other));
+ };
+}
+
+// See the comment above `quote_token!` about the rule ordering.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! quote_token_spanned {
+ ($ident:ident $tokens:ident $span:ident) => {
+ $crate::__private::push_ident_spanned(&mut $tokens, $span, stringify!($ident));
+ };
+
+ (:: $tokens:ident $span:ident) => {
+ $crate::__private::push_colon2_spanned(&mut $tokens, $span);
+ };
+
+ (( $($inner:tt)* ) $tokens:ident $span:ident) => {
+ $crate::__private::push_group_spanned(
+ &mut $tokens,
+ $span,
+ $crate::__private::Delimiter::Parenthesis,
+ $crate::quote_spanned!($span=> $($inner)*),
+ );
+ };
+
+ ([ $($inner:tt)* ] $tokens:ident $span:ident) => {
+ $crate::__private::push_group_spanned(
+ &mut $tokens,
+ $span,
+ $crate::__private::Delimiter::Bracket,
+ $crate::quote_spanned!($span=> $($inner)*),
+ );
+ };
+
+ ({ $($inner:tt)* } $tokens:ident $span:ident) => {
+ $crate::__private::push_group_spanned(
+ &mut $tokens,
+ $span,
+ $crate::__private::Delimiter::Brace,
+ $crate::quote_spanned!($span=> $($inner)*),
+ );
+ };
+
+ (# $tokens:ident $span:ident) => {
+ $crate::__private::push_pound_spanned(&mut $tokens, $span);
+ };
+
+ (, $tokens:ident $span:ident) => {
+ $crate::__private::push_comma_spanned(&mut $tokens, $span);
+ };
+
+ (. $tokens:ident $span:ident) => {
+ $crate::__private::push_dot_spanned(&mut $tokens, $span);
+ };
+
+ (; $tokens:ident $span:ident) => {
+ $crate::__private::push_semi_spanned(&mut $tokens, $span);
+ };
+
+ (: $tokens:ident $span:ident) => {
+ $crate::__private::push_colon_spanned(&mut $tokens, $span);
+ };
+
+ (+ $tokens:ident $span:ident) => {
+ $crate::__private::push_add_spanned(&mut $tokens, $span);
+ };
+
+ (+= $tokens:ident $span:ident) => {
+ $crate::__private::push_add_eq_spanned(&mut $tokens, $span);
+ };
+
+ (& $tokens:ident $span:ident) => {
+ $crate::__private::push_and_spanned(&mut $tokens, $span);
+ };
+
+ (&& $tokens:ident $span:ident) => {
+ $crate::__private::push_and_and_spanned(&mut $tokens, $span);
+ };
+
+ (&= $tokens:ident $span:ident) => {
+ $crate::__private::push_and_eq_spanned(&mut $tokens, $span);
+ };
+
+ (@ $tokens:ident $span:ident) => {
+ $crate::__private::push_at_spanned(&mut $tokens, $span);
+ };
+
+ (! $tokens:ident $span:ident) => {
+ $crate::__private::push_bang_spanned(&mut $tokens, $span);
+ };
+
+ (^ $tokens:ident $span:ident) => {
+ $crate::__private::push_caret_spanned(&mut $tokens, $span);
+ };
+
+ (^= $tokens:ident $span:ident) => {
+ $crate::__private::push_caret_eq_spanned(&mut $tokens, $span);
+ };
+
+ (/ $tokens:ident $span:ident) => {
+ $crate::__private::push_div_spanned(&mut $tokens, $span);
+ };
+
+ (/= $tokens:ident $span:ident) => {
+ $crate::__private::push_div_eq_spanned(&mut $tokens, $span);
+ };
+
+ (.. $tokens:ident $span:ident) => {
+ $crate::__private::push_dot2_spanned(&mut $tokens, $span);
+ };
+
+ (... $tokens:ident $span:ident) => {
+ $crate::__private::push_dot3_spanned(&mut $tokens, $span);
+ };
+
+ (..= $tokens:ident $span:ident) => {
+ $crate::__private::push_dot_dot_eq_spanned(&mut $tokens, $span);
+ };
+
+ (= $tokens:ident $span:ident) => {
+ $crate::__private::push_eq_spanned(&mut $tokens, $span);
+ };
+
+ (== $tokens:ident $span:ident) => {
+ $crate::__private::push_eq_eq_spanned(&mut $tokens, $span);
+ };
+
+ (>= $tokens:ident $span:ident) => {
+ $crate::__private::push_ge_spanned(&mut $tokens, $span);
+ };
+
+ (> $tokens:ident $span:ident) => {
+ $crate::__private::push_gt_spanned(&mut $tokens, $span);
+ };
+
+ (<= $tokens:ident $span:ident) => {
+ $crate::__private::push_le_spanned(&mut $tokens, $span);
+ };
+
+ (< $tokens:ident $span:ident) => {
+ $crate::__private::push_lt_spanned(&mut $tokens, $span);
+ };
+
+ (*= $tokens:ident $span:ident) => {
+ $crate::__private::push_mul_eq_spanned(&mut $tokens, $span);
+ };
+
+ (!= $tokens:ident $span:ident) => {
+ $crate::__private::push_ne_spanned(&mut $tokens, $span);
+ };
+
+ (| $tokens:ident $span:ident) => {
+ $crate::__private::push_or_spanned(&mut $tokens, $span);
+ };
+
+ (|= $tokens:ident $span:ident) => {
+ $crate::__private::push_or_eq_spanned(&mut $tokens, $span);
+ };
+
+ (|| $tokens:ident $span:ident) => {
+ $crate::__private::push_or_or_spanned(&mut $tokens, $span);
+ };
+
+ (? $tokens:ident $span:ident) => {
+ $crate::__private::push_question_spanned(&mut $tokens, $span);
+ };
+
+ (-> $tokens:ident $span:ident) => {
+ $crate::__private::push_rarrow_spanned(&mut $tokens, $span);
+ };
+
+ (<- $tokens:ident $span:ident) => {
+ $crate::__private::push_larrow_spanned(&mut $tokens, $span);
+ };
+
+ (% $tokens:ident $span:ident) => {
+ $crate::__private::push_rem_spanned(&mut $tokens, $span);
+ };
+
+ (%= $tokens:ident $span:ident) => {
+ $crate::__private::push_rem_eq_spanned(&mut $tokens, $span);
+ };
+
+ (=> $tokens:ident $span:ident) => {
+ $crate::__private::push_fat_arrow_spanned(&mut $tokens, $span);
+ };
+
+ (<< $tokens:ident $span:ident) => {
+ $crate::__private::push_shl_spanned(&mut $tokens, $span);
+ };
+
+ (<<= $tokens:ident $span:ident) => {
+ $crate::__private::push_shl_eq_spanned(&mut $tokens, $span);
+ };
+
+ (>> $tokens:ident $span:ident) => {
+ $crate::__private::push_shr_spanned(&mut $tokens, $span);
+ };
+
+ (>>= $tokens:ident $span:ident) => {
+ $crate::__private::push_shr_eq_spanned(&mut $tokens, $span);
+ };
+
+ (* $tokens:ident $span:ident) => {
+ $crate::__private::push_star_spanned(&mut $tokens, $span);
+ };
+
+ (- $tokens:ident $span:ident) => {
+ $crate::__private::push_sub_spanned(&mut $tokens, $span);
+ };
+
+ (-= $tokens:ident $span:ident) => {
+ $crate::__private::push_sub_eq_spanned(&mut $tokens, $span);
+ };
+
+ ($lifetime:lifetime $tokens:ident $span:ident) => {
+ $crate::__private::push_lifetime_spanned(&mut $tokens, $span, stringify!($lifetime));
+ };
+
+ (_ $tokens:ident $span:ident) => {
+ $crate::__private::push_underscore_spanned(&mut $tokens, $span);
+ };
+
+ ($other:tt $tokens:ident $span:ident) => {
+ $crate::__private::parse_spanned(&mut $tokens, $span, stringify!($other));
+ };
+}
diff --git a/third_party/rust/quote/src/runtime.rs b/third_party/rust/quote/src/runtime.rs
new file mode 100644
index 0000000000..eff044a957
--- /dev/null
+++ b/third_party/rust/quote/src/runtime.rs
@@ -0,0 +1,530 @@
+use self::get_span::{GetSpan, GetSpanBase, GetSpanInner};
+use crate::{IdentFragment, ToTokens, TokenStreamExt};
+use core::fmt;
+use core::iter;
+use core::ops::BitOr;
+use proc_macro2::{Group, Ident, Punct, Spacing, TokenTree};
+
+#[doc(hidden)]
+pub use alloc::format;
+#[doc(hidden)]
+pub use core::option::Option;
+
+#[doc(hidden)]
+pub type Delimiter = proc_macro2::Delimiter;
+#[doc(hidden)]
+pub type Span = proc_macro2::Span;
+#[doc(hidden)]
+pub type TokenStream = proc_macro2::TokenStream;
+
+#[doc(hidden)]
+pub struct HasIterator; // True
+#[doc(hidden)]
+pub struct ThereIsNoIteratorInRepetition; // False
+
+impl BitOr<ThereIsNoIteratorInRepetition> for ThereIsNoIteratorInRepetition {
+ type Output = ThereIsNoIteratorInRepetition;
+ fn bitor(self, _rhs: ThereIsNoIteratorInRepetition) -> ThereIsNoIteratorInRepetition {
+ ThereIsNoIteratorInRepetition
+ }
+}
+
+impl BitOr<ThereIsNoIteratorInRepetition> for HasIterator {
+ type Output = HasIterator;
+ fn bitor(self, _rhs: ThereIsNoIteratorInRepetition) -> HasIterator {
+ HasIterator
+ }
+}
+
+impl BitOr<HasIterator> for ThereIsNoIteratorInRepetition {
+ type Output = HasIterator;
+ fn bitor(self, _rhs: HasIterator) -> HasIterator {
+ HasIterator
+ }
+}
+
+impl BitOr<HasIterator> for HasIterator {
+ type Output = HasIterator;
+ fn bitor(self, _rhs: HasIterator) -> HasIterator {
+ HasIterator
+ }
+}
+
+/// Extension traits used by the implementation of `quote!`. These are defined
+/// in separate traits, rather than as a single trait due to ambiguity issues.
+///
+/// These traits expose a `quote_into_iter` method which should allow calling
+/// whichever impl happens to be applicable. Calling that method repeatedly on
+/// the returned value should be idempotent.
+#[doc(hidden)]
+pub mod ext {
+ use super::RepInterp;
+ use super::{HasIterator as HasIter, ThereIsNoIteratorInRepetition as DoesNotHaveIter};
+ use crate::ToTokens;
+ use alloc::collections::btree_set::{self, BTreeSet};
+ use core::slice;
+
+ /// Extension trait providing the `quote_into_iter` method on iterators.
+ #[doc(hidden)]
+ pub trait RepIteratorExt: Iterator + Sized {
+ fn quote_into_iter(self) -> (Self, HasIter) {
+ (self, HasIter)
+ }
+ }
+
+ impl<T: Iterator> RepIteratorExt for T {}
+
+ /// Extension trait providing the `quote_into_iter` method for
+ /// non-iterable types. These types interpolate the same value in each
+ /// iteration of the repetition.
+ #[doc(hidden)]
+ pub trait RepToTokensExt {
+ /// Pretend to be an iterator for the purposes of `quote_into_iter`.
+ /// This allows repeated calls to `quote_into_iter` to continue
+ /// correctly returning DoesNotHaveIter.
+ fn next(&self) -> Option<&Self> {
+ Some(self)
+ }
+
+ fn quote_into_iter(&self) -> (&Self, DoesNotHaveIter) {
+ (self, DoesNotHaveIter)
+ }
+ }
+
+ impl<T: ToTokens + ?Sized> RepToTokensExt for T {}
+
+ /// Extension trait providing the `quote_into_iter` method for types that
+ /// can be referenced as an iterator.
+ #[doc(hidden)]
+ pub trait RepAsIteratorExt<'q> {
+ type Iter: Iterator;
+
+ fn quote_into_iter(&'q self) -> (Self::Iter, HasIter);
+ }
+
+ impl<'q, 'a, T: RepAsIteratorExt<'q> + ?Sized> RepAsIteratorExt<'q> for &'a T {
+ type Iter = T::Iter;
+
+ fn quote_into_iter(&'q self) -> (Self::Iter, HasIter) {
+ <T as RepAsIteratorExt>::quote_into_iter(*self)
+ }
+ }
+
+ impl<'q, 'a, T: RepAsIteratorExt<'q> + ?Sized> RepAsIteratorExt<'q> for &'a mut T {
+ type Iter = T::Iter;
+
+ fn quote_into_iter(&'q self) -> (Self::Iter, HasIter) {
+ <T as RepAsIteratorExt>::quote_into_iter(*self)
+ }
+ }
+
+ impl<'q, T: 'q> RepAsIteratorExt<'q> for [T] {
+ type Iter = slice::Iter<'q, T>;
+
+ fn quote_into_iter(&'q self) -> (Self::Iter, HasIter) {
+ (self.iter(), HasIter)
+ }
+ }
+
+ impl<'q, T: 'q> RepAsIteratorExt<'q> for Vec<T> {
+ type Iter = slice::Iter<'q, T>;
+
+ fn quote_into_iter(&'q self) -> (Self::Iter, HasIter) {
+ (self.iter(), HasIter)
+ }
+ }
+
+ impl<'q, T: 'q> RepAsIteratorExt<'q> for BTreeSet<T> {
+ type Iter = btree_set::Iter<'q, T>;
+
+ fn quote_into_iter(&'q self) -> (Self::Iter, HasIter) {
+ (self.iter(), HasIter)
+ }
+ }
+
+ impl<'q, T: RepAsIteratorExt<'q>> RepAsIteratorExt<'q> for RepInterp<T> {
+ type Iter = T::Iter;
+
+ fn quote_into_iter(&'q self) -> (Self::Iter, HasIter) {
+ self.0.quote_into_iter()
+ }
+ }
+}
+
+// Helper type used within interpolations to allow for repeated binding names.
+// Implements the relevant traits, and exports a dummy `next()` method.
+#[derive(Copy, Clone)]
+#[doc(hidden)]
+pub struct RepInterp<T>(pub T);
+
+impl<T> RepInterp<T> {
+ // This method is intended to look like `Iterator::next`, and is called when
+ // a name is bound multiple times, as the previous binding will shadow the
+ // original `Iterator` object. This allows us to avoid advancing the
+ // iterator multiple times per iteration.
+ pub fn next(self) -> Option<T> {
+ Some(self.0)
+ }
+}
+
+impl<T: Iterator> Iterator for RepInterp<T> {
+ type Item = T::Item;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ self.0.next()
+ }
+}
+
+impl<T: ToTokens> ToTokens for RepInterp<T> {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.0.to_tokens(tokens);
+ }
+}
+
+#[doc(hidden)]
+#[inline]
+pub fn get_span<T>(span: T) -> GetSpan<T> {
+ GetSpan(GetSpanInner(GetSpanBase(span)))
+}
+
+mod get_span {
+ use core::ops::Deref;
+ use proc_macro2::extra::DelimSpan;
+ use proc_macro2::Span;
+
+ pub struct GetSpan<T>(pub(crate) GetSpanInner<T>);
+
+ pub struct GetSpanInner<T>(pub(crate) GetSpanBase<T>);
+
+ pub struct GetSpanBase<T>(pub(crate) T);
+
+ impl GetSpan<Span> {
+ #[inline]
+ pub fn __into_span(self) -> Span {
+ ((self.0).0).0
+ }
+ }
+
+ impl GetSpanInner<DelimSpan> {
+ #[inline]
+ pub fn __into_span(&self) -> Span {
+ (self.0).0.join()
+ }
+ }
+
+ impl<T> GetSpanBase<T> {
+ #[allow(clippy::unused_self)]
+ pub fn __into_span(&self) -> T {
+ unreachable!()
+ }
+ }
+
+ impl<T> Deref for GetSpan<T> {
+ type Target = GetSpanInner<T>;
+
+ #[inline]
+ fn deref(&self) -> &Self::Target {
+ &self.0
+ }
+ }
+
+ impl<T> Deref for GetSpanInner<T> {
+ type Target = GetSpanBase<T>;
+
+ #[inline]
+ fn deref(&self) -> &Self::Target {
+ &self.0
+ }
+ }
+}
+
+#[doc(hidden)]
+pub fn push_group(tokens: &mut TokenStream, delimiter: Delimiter, inner: TokenStream) {
+ tokens.append(Group::new(delimiter, inner));
+}
+
+#[doc(hidden)]
+pub fn push_group_spanned(
+ tokens: &mut TokenStream,
+ span: Span,
+ delimiter: Delimiter,
+ inner: TokenStream,
+) {
+ let mut g = Group::new(delimiter, inner);
+ g.set_span(span);
+ tokens.append(g);
+}
+
+#[doc(hidden)]
+pub fn parse(tokens: &mut TokenStream, s: &str) {
+ let s: TokenStream = s.parse().expect("invalid token stream");
+ tokens.extend(iter::once(s));
+}
+
+#[doc(hidden)]
+pub fn parse_spanned(tokens: &mut TokenStream, span: Span, s: &str) {
+ let s: TokenStream = s.parse().expect("invalid token stream");
+ tokens.extend(s.into_iter().map(|t| respan_token_tree(t, span)));
+}
+
+// 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 = g
+ .stream()
+ .into_iter()
+ .map(|token| respan_token_tree(token, span))
+ .collect();
+ *g = Group::new(g.delimiter(), stream);
+ g.set_span(span);
+ }
+ other => other.set_span(span),
+ }
+ token
+}
+
+#[doc(hidden)]
+pub fn push_ident(tokens: &mut TokenStream, s: &str) {
+ let span = Span::call_site();
+ push_ident_spanned(tokens, span, s);
+}
+
+#[doc(hidden)]
+pub fn push_ident_spanned(tokens: &mut TokenStream, span: Span, s: &str) {
+ tokens.append(ident_maybe_raw(s, span));
+}
+
+#[doc(hidden)]
+pub fn push_lifetime(tokens: &mut TokenStream, lifetime: &str) {
+ struct Lifetime<'a> {
+ name: &'a str,
+ state: u8,
+ }
+
+ impl<'a> Iterator for Lifetime<'a> {
+ type Item = TokenTree;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ match self.state {
+ 0 => {
+ self.state = 1;
+ Some(TokenTree::Punct(Punct::new('\'', Spacing::Joint)))
+ }
+ 1 => {
+ self.state = 2;
+ Some(TokenTree::Ident(Ident::new(self.name, Span::call_site())))
+ }
+ _ => None,
+ }
+ }
+ }
+
+ tokens.extend(Lifetime {
+ name: &lifetime[1..],
+ state: 0,
+ });
+}
+
+#[doc(hidden)]
+pub fn push_lifetime_spanned(tokens: &mut TokenStream, span: Span, lifetime: &str) {
+ struct Lifetime<'a> {
+ name: &'a str,
+ span: Span,
+ state: u8,
+ }
+
+ impl<'a> Iterator for Lifetime<'a> {
+ type Item = TokenTree;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ match self.state {
+ 0 => {
+ self.state = 1;
+ let mut apostrophe = Punct::new('\'', Spacing::Joint);
+ apostrophe.set_span(self.span);
+ Some(TokenTree::Punct(apostrophe))
+ }
+ 1 => {
+ self.state = 2;
+ Some(TokenTree::Ident(Ident::new(self.name, self.span)))
+ }
+ _ => None,
+ }
+ }
+ }
+
+ tokens.extend(Lifetime {
+ name: &lifetime[1..],
+ span,
+ state: 0,
+ });
+}
+
+macro_rules! push_punct {
+ ($name:ident $spanned:ident $char1:tt) => {
+ #[doc(hidden)]
+ pub fn $name(tokens: &mut TokenStream) {
+ tokens.append(Punct::new($char1, Spacing::Alone));
+ }
+ #[doc(hidden)]
+ pub fn $spanned(tokens: &mut TokenStream, span: Span) {
+ let mut punct = Punct::new($char1, Spacing::Alone);
+ punct.set_span(span);
+ tokens.append(punct);
+ }
+ };
+ ($name:ident $spanned:ident $char1:tt $char2:tt) => {
+ #[doc(hidden)]
+ pub fn $name(tokens: &mut TokenStream) {
+ tokens.append(Punct::new($char1, Spacing::Joint));
+ tokens.append(Punct::new($char2, Spacing::Alone));
+ }
+ #[doc(hidden)]
+ pub fn $spanned(tokens: &mut TokenStream, span: Span) {
+ let mut punct = Punct::new($char1, Spacing::Joint);
+ punct.set_span(span);
+ tokens.append(punct);
+ let mut punct = Punct::new($char2, Spacing::Alone);
+ punct.set_span(span);
+ tokens.append(punct);
+ }
+ };
+ ($name:ident $spanned:ident $char1:tt $char2:tt $char3:tt) => {
+ #[doc(hidden)]
+ pub fn $name(tokens: &mut TokenStream) {
+ tokens.append(Punct::new($char1, Spacing::Joint));
+ tokens.append(Punct::new($char2, Spacing::Joint));
+ tokens.append(Punct::new($char3, Spacing::Alone));
+ }
+ #[doc(hidden)]
+ pub fn $spanned(tokens: &mut TokenStream, span: Span) {
+ let mut punct = Punct::new($char1, Spacing::Joint);
+ punct.set_span(span);
+ tokens.append(punct);
+ let mut punct = Punct::new($char2, Spacing::Joint);
+ punct.set_span(span);
+ tokens.append(punct);
+ let mut punct = Punct::new($char3, Spacing::Alone);
+ punct.set_span(span);
+ tokens.append(punct);
+ }
+ };
+}
+
+push_punct!(push_add push_add_spanned '+');
+push_punct!(push_add_eq push_add_eq_spanned '+' '=');
+push_punct!(push_and push_and_spanned '&');
+push_punct!(push_and_and push_and_and_spanned '&' '&');
+push_punct!(push_and_eq push_and_eq_spanned '&' '=');
+push_punct!(push_at push_at_spanned '@');
+push_punct!(push_bang push_bang_spanned '!');
+push_punct!(push_caret push_caret_spanned '^');
+push_punct!(push_caret_eq push_caret_eq_spanned '^' '=');
+push_punct!(push_colon push_colon_spanned ':');
+push_punct!(push_colon2 push_colon2_spanned ':' ':');
+push_punct!(push_comma push_comma_spanned ',');
+push_punct!(push_div push_div_spanned '/');
+push_punct!(push_div_eq push_div_eq_spanned '/' '=');
+push_punct!(push_dot push_dot_spanned '.');
+push_punct!(push_dot2 push_dot2_spanned '.' '.');
+push_punct!(push_dot3 push_dot3_spanned '.' '.' '.');
+push_punct!(push_dot_dot_eq push_dot_dot_eq_spanned '.' '.' '=');
+push_punct!(push_eq push_eq_spanned '=');
+push_punct!(push_eq_eq push_eq_eq_spanned '=' '=');
+push_punct!(push_ge push_ge_spanned '>' '=');
+push_punct!(push_gt push_gt_spanned '>');
+push_punct!(push_le push_le_spanned '<' '=');
+push_punct!(push_lt push_lt_spanned '<');
+push_punct!(push_mul_eq push_mul_eq_spanned '*' '=');
+push_punct!(push_ne push_ne_spanned '!' '=');
+push_punct!(push_or push_or_spanned '|');
+push_punct!(push_or_eq push_or_eq_spanned '|' '=');
+push_punct!(push_or_or push_or_or_spanned '|' '|');
+push_punct!(push_pound push_pound_spanned '#');
+push_punct!(push_question push_question_spanned '?');
+push_punct!(push_rarrow push_rarrow_spanned '-' '>');
+push_punct!(push_larrow push_larrow_spanned '<' '-');
+push_punct!(push_rem push_rem_spanned '%');
+push_punct!(push_rem_eq push_rem_eq_spanned '%' '=');
+push_punct!(push_fat_arrow push_fat_arrow_spanned '=' '>');
+push_punct!(push_semi push_semi_spanned ';');
+push_punct!(push_shl push_shl_spanned '<' '<');
+push_punct!(push_shl_eq push_shl_eq_spanned '<' '<' '=');
+push_punct!(push_shr push_shr_spanned '>' '>');
+push_punct!(push_shr_eq push_shr_eq_spanned '>' '>' '=');
+push_punct!(push_star push_star_spanned '*');
+push_punct!(push_sub push_sub_spanned '-');
+push_punct!(push_sub_eq push_sub_eq_spanned '-' '=');
+
+#[doc(hidden)]
+pub fn push_underscore(tokens: &mut TokenStream) {
+ push_underscore_spanned(tokens, Span::call_site());
+}
+
+#[doc(hidden)]
+pub fn push_underscore_spanned(tokens: &mut TokenStream, span: Span) {
+ tokens.append(Ident::new("_", span));
+}
+
+// Helper method for constructing identifiers from the `format_ident!` macro,
+// handling `r#` prefixes.
+#[doc(hidden)]
+pub fn mk_ident(id: &str, span: Option<Span>) -> Ident {
+ let span = span.unwrap_or_else(Span::call_site);
+ ident_maybe_raw(id, span)
+}
+
+fn ident_maybe_raw(id: &str, span: Span) -> Ident {
+ if let Some(id) = id.strip_prefix("r#") {
+ Ident::new_raw(id, span)
+ } else {
+ Ident::new(id, span)
+ }
+}
+
+// Adapts from `IdentFragment` to `fmt::Display` for use by the `format_ident!`
+// macro, and exposes span information from these fragments.
+//
+// This struct also has forwarding implementations of the formatting traits
+// `Octal`, `LowerHex`, `UpperHex`, and `Binary` to allow for their use within
+// `format_ident!`.
+#[derive(Copy, Clone)]
+#[doc(hidden)]
+pub struct IdentFragmentAdapter<T: IdentFragment>(pub T);
+
+impl<T: IdentFragment> IdentFragmentAdapter<T> {
+ pub fn span(&self) -> Option<Span> {
+ self.0.span()
+ }
+}
+
+impl<T: IdentFragment> fmt::Display for IdentFragmentAdapter<T> {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ IdentFragment::fmt(&self.0, f)
+ }
+}
+
+impl<T: IdentFragment + fmt::Octal> fmt::Octal for IdentFragmentAdapter<T> {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ fmt::Octal::fmt(&self.0, f)
+ }
+}
+
+impl<T: IdentFragment + fmt::LowerHex> fmt::LowerHex for IdentFragmentAdapter<T> {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ fmt::LowerHex::fmt(&self.0, f)
+ }
+}
+
+impl<T: IdentFragment + fmt::UpperHex> fmt::UpperHex for IdentFragmentAdapter<T> {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ fmt::UpperHex::fmt(&self.0, f)
+ }
+}
+
+impl<T: IdentFragment + fmt::Binary> fmt::Binary for IdentFragmentAdapter<T> {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ fmt::Binary::fmt(&self.0, f)
+ }
+}
diff --git a/third_party/rust/quote/src/spanned.rs b/third_party/rust/quote/src/spanned.rs
new file mode 100644
index 0000000000..6eba64445d
--- /dev/null
+++ b/third_party/rust/quote/src/spanned.rs
@@ -0,0 +1,50 @@
+use crate::ToTokens;
+use proc_macro2::extra::DelimSpan;
+use proc_macro2::{Span, TokenStream};
+
+// Not public API other than via the syn crate. Use syn::spanned::Spanned.
+pub trait Spanned: private::Sealed {
+ fn __span(&self) -> Span;
+}
+
+impl Spanned for Span {
+ fn __span(&self) -> Span {
+ *self
+ }
+}
+
+impl Spanned for DelimSpan {
+ fn __span(&self) -> Span {
+ self.join()
+ }
+}
+
+impl<T: ?Sized + ToTokens> Spanned for T {
+ fn __span(&self) -> Span {
+ join_spans(self.into_token_stream())
+ }
+}
+
+fn join_spans(tokens: TokenStream) -> Span {
+ let mut iter = tokens.into_iter().map(|tt| tt.span());
+
+ let first = match iter.next() {
+ Some(span) => span,
+ None => return Span::call_site(),
+ };
+
+ iter.fold(None, |_prev, next| Some(next))
+ .and_then(|last| first.join(last))
+ .unwrap_or(first)
+}
+
+mod private {
+ use crate::ToTokens;
+ use proc_macro2::extra::DelimSpan;
+ use proc_macro2::Span;
+
+ pub trait Sealed {}
+ impl Sealed for Span {}
+ impl Sealed for DelimSpan {}
+ impl<T: ?Sized + ToTokens> Sealed for T {}
+}
diff --git a/third_party/rust/quote/src/to_tokens.rs b/third_party/rust/quote/src/to_tokens.rs
new file mode 100644
index 0000000000..23b6ec2c08
--- /dev/null
+++ b/third_party/rust/quote/src/to_tokens.rs
@@ -0,0 +1,209 @@
+use super::TokenStreamExt;
+use alloc::borrow::Cow;
+use alloc::rc::Rc;
+use core::iter;
+use proc_macro2::{Group, Ident, Literal, Punct, Span, TokenStream, TokenTree};
+
+/// Types that can be interpolated inside a `quote!` invocation.
+///
+/// [`quote!`]: macro.quote.html
+pub trait ToTokens {
+ /// Write `self` to the given `TokenStream`.
+ ///
+ /// The token append methods provided by the [`TokenStreamExt`] extension
+ /// trait may be useful for implementing `ToTokens`.
+ ///
+ /// [`TokenStreamExt`]: trait.TokenStreamExt.html
+ ///
+ /// # Example
+ ///
+ /// Example implementation for a struct representing Rust paths like
+ /// `std::cmp::PartialEq`:
+ ///
+ /// ```
+ /// use proc_macro2::{TokenTree, Spacing, Span, Punct, TokenStream};
+ /// use quote::{TokenStreamExt, ToTokens};
+ ///
+ /// pub struct Path {
+ /// pub global: bool,
+ /// pub segments: Vec<PathSegment>,
+ /// }
+ ///
+ /// impl ToTokens for Path {
+ /// fn to_tokens(&self, tokens: &mut TokenStream) {
+ /// for (i, segment) in self.segments.iter().enumerate() {
+ /// if i > 0 || self.global {
+ /// // Double colon `::`
+ /// tokens.append(Punct::new(':', Spacing::Joint));
+ /// tokens.append(Punct::new(':', Spacing::Alone));
+ /// }
+ /// segment.to_tokens(tokens);
+ /// }
+ /// }
+ /// }
+ /// #
+ /// # pub struct PathSegment;
+ /// #
+ /// # impl ToTokens for PathSegment {
+ /// # fn to_tokens(&self, tokens: &mut TokenStream) {
+ /// # unimplemented!()
+ /// # }
+ /// # }
+ /// ```
+ fn to_tokens(&self, tokens: &mut TokenStream);
+
+ /// Convert `self` directly into a `TokenStream` object.
+ ///
+ /// This method is implicitly implemented using `to_tokens`, and acts as a
+ /// convenience method for consumers of the `ToTokens` trait.
+ fn to_token_stream(&self) -> TokenStream {
+ let mut tokens = TokenStream::new();
+ self.to_tokens(&mut tokens);
+ tokens
+ }
+
+ /// Convert `self` directly into a `TokenStream` object.
+ ///
+ /// This method is implicitly implemented using `to_tokens`, and acts as a
+ /// convenience method for consumers of the `ToTokens` trait.
+ fn into_token_stream(self) -> TokenStream
+ where
+ Self: Sized,
+ {
+ self.to_token_stream()
+ }
+}
+
+impl<'a, T: ?Sized + ToTokens> ToTokens for &'a T {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ (**self).to_tokens(tokens);
+ }
+}
+
+impl<'a, T: ?Sized + ToTokens> ToTokens for &'a mut T {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ (**self).to_tokens(tokens);
+ }
+}
+
+impl<'a, T: ?Sized + ToOwned + ToTokens> ToTokens for Cow<'a, T> {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ (**self).to_tokens(tokens);
+ }
+}
+
+impl<T: ?Sized + ToTokens> ToTokens for Box<T> {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ (**self).to_tokens(tokens);
+ }
+}
+
+impl<T: ?Sized + ToTokens> ToTokens for Rc<T> {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ (**self).to_tokens(tokens);
+ }
+}
+
+impl<T: ToTokens> ToTokens for Option<T> {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ if let Some(ref t) = *self {
+ t.to_tokens(tokens);
+ }
+ }
+}
+
+impl ToTokens for str {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append(Literal::string(self));
+ }
+}
+
+impl ToTokens for String {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ self.as_str().to_tokens(tokens);
+ }
+}
+
+macro_rules! primitive {
+ ($($t:ident => $name:ident)*) => {
+ $(
+ impl ToTokens for $t {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append(Literal::$name(*self));
+ }
+ }
+ )*
+ };
+}
+
+primitive! {
+ i8 => i8_suffixed
+ i16 => i16_suffixed
+ i32 => i32_suffixed
+ i64 => i64_suffixed
+ i128 => i128_suffixed
+ isize => isize_suffixed
+
+ u8 => u8_suffixed
+ u16 => u16_suffixed
+ u32 => u32_suffixed
+ u64 => u64_suffixed
+ u128 => u128_suffixed
+ usize => usize_suffixed
+
+ f32 => f32_suffixed
+ f64 => f64_suffixed
+}
+
+impl ToTokens for char {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append(Literal::character(*self));
+ }
+}
+
+impl ToTokens for bool {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ let word = if *self { "true" } else { "false" };
+ tokens.append(Ident::new(word, Span::call_site()));
+ }
+}
+
+impl ToTokens for Group {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append(self.clone());
+ }
+}
+
+impl ToTokens for Ident {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append(self.clone());
+ }
+}
+
+impl ToTokens for Punct {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append(self.clone());
+ }
+}
+
+impl ToTokens for Literal {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append(self.clone());
+ }
+}
+
+impl ToTokens for TokenTree {
+ fn to_tokens(&self, dst: &mut TokenStream) {
+ dst.append(self.clone());
+ }
+}
+
+impl ToTokens for TokenStream {
+ fn to_tokens(&self, dst: &mut TokenStream) {
+ dst.extend(iter::once(self.clone()));
+ }
+
+ fn into_token_stream(self) -> TokenStream {
+ self
+ }
+}
diff --git a/third_party/rust/quote/tests/compiletest.rs b/third_party/rust/quote/tests/compiletest.rs
new file mode 100644
index 0000000000..7974a6249e
--- /dev/null
+++ b/third_party/rust/quote/tests/compiletest.rs
@@ -0,0 +1,7 @@
+#[rustversion::attr(not(nightly), ignore)]
+#[cfg_attr(miri, ignore)]
+#[test]
+fn ui() {
+ let t = trybuild::TestCases::new();
+ t.compile_fail("tests/ui/*.rs");
+}
diff --git a/third_party/rust/quote/tests/test.rs b/third_party/rust/quote/tests/test.rs
new file mode 100644
index 0000000000..eab4f55aa8
--- /dev/null
+++ b/third_party/rust/quote/tests/test.rs
@@ -0,0 +1,549 @@
+#![allow(
+ clippy::disallowed_names,
+ clippy::let_underscore_untyped,
+ clippy::shadow_unrelated,
+ clippy::unseparated_literal_suffix,
+ clippy::used_underscore_binding
+)]
+
+extern crate proc_macro;
+
+use std::borrow::Cow;
+use std::collections::BTreeSet;
+
+use proc_macro2::{Delimiter, Group, Ident, Span, TokenStream};
+use quote::{format_ident, quote, quote_spanned, TokenStreamExt};
+
+struct X;
+
+impl quote::ToTokens for X {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ tokens.append(Ident::new("X", Span::call_site()));
+ }
+}
+
+#[test]
+fn test_quote_impl() {
+ let tokens = quote! {
+ impl<'a, T: ToTokens> ToTokens for &'a T {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ (**self).to_tokens(tokens)
+ }
+ }
+ };
+
+ let expected = concat!(
+ "impl < 'a , T : ToTokens > ToTokens for & 'a T { ",
+ "fn to_tokens (& self , tokens : & mut TokenStream) { ",
+ "(* * self) . to_tokens (tokens) ",
+ "} ",
+ "}"
+ );
+
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_quote_spanned_impl() {
+ let span = Span::call_site();
+ let tokens = quote_spanned! {span=>
+ impl<'a, T: ToTokens> ToTokens for &'a T {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ (**self).to_tokens(tokens)
+ }
+ }
+ };
+
+ let expected = concat!(
+ "impl < 'a , T : ToTokens > ToTokens for & 'a T { ",
+ "fn to_tokens (& self , tokens : & mut TokenStream) { ",
+ "(* * self) . to_tokens (tokens) ",
+ "} ",
+ "}"
+ );
+
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_substitution() {
+ let x = X;
+ let tokens = quote!(#x <#x> (#x) [#x] {#x});
+
+ let expected = "X < X > (X) [X] { X }";
+
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_iter() {
+ let primes = &[X, X, X, X];
+
+ assert_eq!("X X X X", quote!(#(#primes)*).to_string());
+
+ assert_eq!("X , X , X , X ,", quote!(#(#primes,)*).to_string());
+
+ assert_eq!("X , X , X , X", quote!(#(#primes),*).to_string());
+}
+
+#[test]
+fn test_array() {
+ let array: [u8; 40] = [0; 40];
+ let _ = quote!(#(#array #array)*);
+
+ let ref_array: &[u8; 40] = &[0; 40];
+ let _ = quote!(#(#ref_array #ref_array)*);
+
+ let ref_slice: &[u8] = &[0; 40];
+ let _ = quote!(#(#ref_slice #ref_slice)*);
+
+ let array: [X; 2] = [X, X]; // !Copy
+ let _ = quote!(#(#array #array)*);
+
+ let ref_array: &[X; 2] = &[X, X];
+ let _ = quote!(#(#ref_array #ref_array)*);
+
+ let ref_slice: &[X] = &[X, X];
+ let _ = quote!(#(#ref_slice #ref_slice)*);
+}
+
+#[test]
+fn test_advanced() {
+ let generics = quote!( <'a, T> );
+
+ let where_clause = quote!( where T: Serialize );
+
+ let field_ty = quote!(String);
+
+ let item_ty = quote!(Cow<'a, str>);
+
+ let path = quote!(SomeTrait::serialize_with);
+
+ let value = quote!(self.x);
+
+ let tokens = quote! {
+ struct SerializeWith #generics #where_clause {
+ value: &'a #field_ty,
+ phantom: ::std::marker::PhantomData<#item_ty>,
+ }
+
+ impl #generics ::serde::Serialize for SerializeWith #generics #where_clause {
+ fn serialize<S>(&self, s: &mut S) -> Result<(), S::Error>
+ where S: ::serde::Serializer
+ {
+ #path(self.value, s)
+ }
+ }
+
+ SerializeWith {
+ value: #value,
+ phantom: ::std::marker::PhantomData::<#item_ty>,
+ }
+ };
+
+ let expected = concat!(
+ "struct SerializeWith < 'a , T > where T : Serialize { ",
+ "value : & 'a String , ",
+ "phantom : :: std :: marker :: PhantomData < Cow < 'a , str > > , ",
+ "} ",
+ "impl < 'a , T > :: serde :: Serialize for SerializeWith < 'a , T > where T : Serialize { ",
+ "fn serialize < S > (& self , s : & mut S) -> Result < () , S :: Error > ",
+ "where S : :: serde :: Serializer ",
+ "{ ",
+ "SomeTrait :: serialize_with (self . value , s) ",
+ "} ",
+ "} ",
+ "SerializeWith { ",
+ "value : self . x , ",
+ "phantom : :: std :: marker :: PhantomData :: < Cow < 'a , str > > , ",
+ "}"
+ );
+
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_integer() {
+ let ii8 = -1i8;
+ let ii16 = -1i16;
+ let ii32 = -1i32;
+ let ii64 = -1i64;
+ let ii128 = -1i128;
+ let iisize = -1isize;
+ let uu8 = 1u8;
+ let uu16 = 1u16;
+ let uu32 = 1u32;
+ let uu64 = 1u64;
+ let uu128 = 1u128;
+ let uusize = 1usize;
+
+ let tokens = quote! {
+ 1 1i32 1u256
+ #ii8 #ii16 #ii32 #ii64 #ii128 #iisize
+ #uu8 #uu16 #uu32 #uu64 #uu128 #uusize
+ };
+ let expected =
+ "1 1i32 1u256 - 1i8 - 1i16 - 1i32 - 1i64 - 1i128 - 1isize 1u8 1u16 1u32 1u64 1u128 1usize";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_floating() {
+ let e32 = 2.345f32;
+
+ let e64 = 2.345f64;
+
+ let tokens = quote! {
+ #e32
+ #e64
+ };
+ let expected = concat!("2.345f32 2.345f64");
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_char() {
+ let zero = '\u{1}';
+ let pound = '#';
+ let quote = '"';
+ let apost = '\'';
+ let newline = '\n';
+ let heart = '\u{2764}';
+
+ let tokens = quote! {
+ #zero #pound #quote #apost #newline #heart
+ };
+ let expected = "'\\u{1}' '#' '\"' '\\'' '\\n' '\u{2764}'";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_str() {
+ let s = "\u{1} a 'b \" c";
+ let tokens = quote!(#s);
+ let expected = "\"\\u{1} a 'b \\\" c\"";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_string() {
+ let s = "\u{1} a 'b \" c".to_string();
+ let tokens = quote!(#s);
+ let expected = "\"\\u{1} a 'b \\\" c\"";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_interpolated_literal() {
+ macro_rules! m {
+ ($literal:literal) => {
+ quote!($literal)
+ };
+ }
+
+ let tokens = m!(1);
+ let expected = "1";
+ assert_eq!(expected, tokens.to_string());
+
+ let tokens = m!(-1);
+ let expected = "- 1";
+ assert_eq!(expected, tokens.to_string());
+
+ let tokens = m!(true);
+ let expected = "true";
+ assert_eq!(expected, tokens.to_string());
+
+ let tokens = m!(-true);
+ let expected = "- true";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_ident() {
+ let foo = Ident::new("Foo", Span::call_site());
+ let bar = Ident::new(&format!("Bar{}", 7), Span::call_site());
+ let tokens = quote!(struct #foo; enum #bar {});
+ let expected = "struct Foo ; enum Bar7 { }";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_underscore() {
+ let tokens = quote!(let _;);
+ let expected = "let _ ;";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_duplicate() {
+ let ch = 'x';
+
+ let tokens = quote!(#ch #ch);
+
+ let expected = "'x' 'x'";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_fancy_repetition() {
+ let foo = vec!["a", "b"];
+ let bar = vec![true, false];
+
+ let tokens = quote! {
+ #(#foo: #bar),*
+ };
+
+ let expected = r#""a" : true , "b" : false"#;
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_nested_fancy_repetition() {
+ let nested = vec![vec!['a', 'b', 'c'], vec!['x', 'y', 'z']];
+
+ let tokens = quote! {
+ #(
+ #(#nested)*
+ ),*
+ };
+
+ let expected = "'a' 'b' 'c' , 'x' 'y' 'z'";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_duplicate_name_repetition() {
+ let foo = &["a", "b"];
+
+ let tokens = quote! {
+ #(#foo: #foo),*
+ #(#foo: #foo),*
+ };
+
+ let expected = r#""a" : "a" , "b" : "b" "a" : "a" , "b" : "b""#;
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_duplicate_name_repetition_no_copy() {
+ let foo = vec!["a".to_owned(), "b".to_owned()];
+
+ let tokens = quote! {
+ #(#foo: #foo),*
+ };
+
+ let expected = r#""a" : "a" , "b" : "b""#;
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_btreeset_repetition() {
+ let mut set = BTreeSet::new();
+ set.insert("a".to_owned());
+ set.insert("b".to_owned());
+
+ let tokens = quote! {
+ #(#set: #set),*
+ };
+
+ let expected = r#""a" : "a" , "b" : "b""#;
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_variable_name_conflict() {
+ // The implementation of `#(...),*` uses the variable `_i` but it should be
+ // fine, if a little confusing when debugging.
+ let _i = vec!['a', 'b'];
+ let tokens = quote! { #(#_i),* };
+ let expected = "'a' , 'b'";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_nonrep_in_repetition() {
+ let rep = vec!["a", "b"];
+ let nonrep = "c";
+
+ let tokens = quote! {
+ #(#rep #rep : #nonrep #nonrep),*
+ };
+
+ let expected = r#""a" "a" : "c" "c" , "b" "b" : "c" "c""#;
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_empty_quote() {
+ let tokens = quote!();
+ assert_eq!("", tokens.to_string());
+}
+
+#[test]
+fn test_box_str() {
+ let b = "str".to_owned().into_boxed_str();
+ let tokens = quote! { #b };
+ assert_eq!("\"str\"", tokens.to_string());
+}
+
+#[test]
+fn test_cow() {
+ let owned: Cow<Ident> = Cow::Owned(Ident::new("owned", Span::call_site()));
+
+ let ident = Ident::new("borrowed", Span::call_site());
+ let borrowed = Cow::Borrowed(&ident);
+
+ let tokens = quote! { #owned #borrowed };
+ assert_eq!("owned borrowed", tokens.to_string());
+}
+
+#[test]
+fn test_closure() {
+ fn field_i(i: usize) -> Ident {
+ format_ident!("__field{}", i)
+ }
+
+ let fields = (0usize..3)
+ .map(field_i as fn(_) -> _)
+ .map(|var| quote! { #var });
+
+ let tokens = quote! { #(#fields)* };
+ assert_eq!("__field0 __field1 __field2", tokens.to_string());
+}
+
+#[test]
+fn test_append_tokens() {
+ let mut a = quote!(a);
+ let b = quote!(b);
+ a.append_all(b);
+ assert_eq!("a b", a.to_string());
+}
+
+#[test]
+fn test_format_ident() {
+ let id0 = format_ident!("Aa");
+ let id1 = format_ident!("Hello{x}", x = id0);
+ let id2 = format_ident!("Hello{x}", x = 5usize);
+ let id3 = format_ident!("Hello{}_{x}", id0, x = 10usize);
+ let id4 = format_ident!("Aa", span = Span::call_site());
+ let id5 = format_ident!("Hello{}", Cow::Borrowed("World"));
+
+ assert_eq!(id0, "Aa");
+ assert_eq!(id1, "HelloAa");
+ assert_eq!(id2, "Hello5");
+ assert_eq!(id3, "HelloAa_10");
+ assert_eq!(id4, "Aa");
+ assert_eq!(id5, "HelloWorld");
+}
+
+#[test]
+fn test_format_ident_strip_raw() {
+ let id = format_ident!("r#struct");
+ let my_id = format_ident!("MyId{}", id);
+ let raw_my_id = format_ident!("r#MyId{}", id);
+
+ assert_eq!(id, "r#struct");
+ assert_eq!(my_id, "MyIdstruct");
+ assert_eq!(raw_my_id, "r#MyIdstruct");
+}
+
+#[test]
+fn test_outer_line_comment() {
+ let tokens = quote! {
+ /// doc
+ };
+ let expected = "# [doc = r\" doc\"]";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_inner_line_comment() {
+ let tokens = quote! {
+ //! doc
+ };
+ let expected = "# ! [doc = r\" doc\"]";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_outer_block_comment() {
+ let tokens = quote! {
+ /** doc */
+ };
+ let expected = "# [doc = r\" doc \"]";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_inner_block_comment() {
+ let tokens = quote! {
+ /*! doc */
+ };
+ let expected = "# ! [doc = r\" doc \"]";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_outer_attr() {
+ let tokens = quote! {
+ #[inline]
+ };
+ let expected = "# [inline]";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_inner_attr() {
+ let tokens = quote! {
+ #![no_std]
+ };
+ let expected = "# ! [no_std]";
+ assert_eq!(expected, tokens.to_string());
+}
+
+// https://github.com/dtolnay/quote/issues/130
+#[test]
+fn test_star_after_repetition() {
+ let c = vec!['0', '1'];
+ let tokens = quote! {
+ #(
+ f(#c);
+ )*
+ *out = None;
+ };
+ let expected = "f ('0') ; f ('1') ; * out = None ;";
+ assert_eq!(expected, tokens.to_string());
+}
+
+#[test]
+fn test_quote_raw_id() {
+ let id = quote!(r#raw_id);
+ assert_eq!(id.to_string(), "r#raw_id");
+}
+
+#[test]
+fn test_type_inference_for_span() {
+ trait CallSite {
+ fn get() -> Self;
+ }
+
+ impl CallSite for Span {
+ fn get() -> Self {
+ Span::call_site()
+ }
+ }
+
+ let span = Span::call_site();
+ let _ = quote_spanned!(span=> ...);
+
+ let delim_span = Group::new(Delimiter::Parenthesis, TokenStream::new()).delim_span();
+ let _ = quote_spanned!(delim_span=> ...);
+
+ let inferred = CallSite::get();
+ let _ = quote_spanned!(inferred=> ...);
+
+ if false {
+ let proc_macro_span = proc_macro::Span::call_site();
+ let _ = quote_spanned!(proc_macro_span.into()=> ...);
+ }
+}
diff --git a/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated-dup.rs b/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated-dup.rs
new file mode 100644
index 0000000000..0a39f41507
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated-dup.rs
@@ -0,0 +1,9 @@
+use quote::quote;
+
+fn main() {
+ let nonrep = "";
+
+ // Without some protection against repetitions with no iterator somewhere
+ // inside, this would loop infinitely.
+ quote!(#(#nonrep #nonrep)*);
+}
diff --git a/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated-dup.stderr b/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated-dup.stderr
new file mode 100644
index 0000000000..99c20a5676
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated-dup.stderr
@@ -0,0 +1,11 @@
+error[E0308]: mismatched types
+ --> tests/ui/does-not-have-iter-interpolated-dup.rs:8:5
+ |
+8 | quote!(#(#nonrep #nonrep)*);
+ | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+ | |
+ | expected `HasIterator`, found `ThereIsNoIteratorInRepetition`
+ | expected due to this
+ | here the type of `has_iter` is inferred to be `ThereIsNoIteratorInRepetition`
+ |
+ = note: this error originates in the macro `$crate::quote_token_with_context` which comes from the expansion of the macro `quote` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated.rs b/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated.rs
new file mode 100644
index 0000000000..2c740cc083
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated.rs
@@ -0,0 +1,9 @@
+use quote::quote;
+
+fn main() {
+ let nonrep = "";
+
+ // Without some protection against repetitions with no iterator somewhere
+ // inside, this would loop infinitely.
+ quote!(#(#nonrep)*);
+}
diff --git a/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated.stderr b/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated.stderr
new file mode 100644
index 0000000000..ef908131ba
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/does-not-have-iter-interpolated.stderr
@@ -0,0 +1,11 @@
+error[E0308]: mismatched types
+ --> tests/ui/does-not-have-iter-interpolated.rs:8:5
+ |
+8 | quote!(#(#nonrep)*);
+ | ^^^^^^^^^^^^^^^^^^^
+ | |
+ | expected `HasIterator`, found `ThereIsNoIteratorInRepetition`
+ | expected due to this
+ | here the type of `has_iter` is inferred to be `ThereIsNoIteratorInRepetition`
+ |
+ = note: this error originates in the macro `$crate::quote_token_with_context` which comes from the expansion of the macro `quote` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/third_party/rust/quote/tests/ui/does-not-have-iter-separated.rs b/third_party/rust/quote/tests/ui/does-not-have-iter-separated.rs
new file mode 100644
index 0000000000..c027243dda
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/does-not-have-iter-separated.rs
@@ -0,0 +1,5 @@
+use quote::quote;
+
+fn main() {
+ quote!(#(a b),*);
+}
diff --git a/third_party/rust/quote/tests/ui/does-not-have-iter-separated.stderr b/third_party/rust/quote/tests/ui/does-not-have-iter-separated.stderr
new file mode 100644
index 0000000000..7c6e30f2b8
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/does-not-have-iter-separated.stderr
@@ -0,0 +1,10 @@
+error[E0308]: mismatched types
+ --> tests/ui/does-not-have-iter-separated.rs:4:5
+ |
+4 | quote!(#(a b),*);
+ | ^^^^^^^^^^^^^^^^
+ | |
+ | expected `HasIterator`, found `ThereIsNoIteratorInRepetition`
+ | expected due to this
+ |
+ = note: this error originates in the macro `$crate::quote_token_with_context` which comes from the expansion of the macro `quote` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/third_party/rust/quote/tests/ui/does-not-have-iter.rs b/third_party/rust/quote/tests/ui/does-not-have-iter.rs
new file mode 100644
index 0000000000..8908353b57
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/does-not-have-iter.rs
@@ -0,0 +1,5 @@
+use quote::quote;
+
+fn main() {
+ quote!(#(a b)*);
+}
diff --git a/third_party/rust/quote/tests/ui/does-not-have-iter.stderr b/third_party/rust/quote/tests/ui/does-not-have-iter.stderr
new file mode 100644
index 0000000000..0b13e5cb78
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/does-not-have-iter.stderr
@@ -0,0 +1,10 @@
+error[E0308]: mismatched types
+ --> tests/ui/does-not-have-iter.rs:4:5
+ |
+4 | quote!(#(a b)*);
+ | ^^^^^^^^^^^^^^^
+ | |
+ | expected `HasIterator`, found `ThereIsNoIteratorInRepetition`
+ | expected due to this
+ |
+ = note: this error originates in the macro `$crate::quote_token_with_context` which comes from the expansion of the macro `quote` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/third_party/rust/quote/tests/ui/not-quotable.rs b/third_party/rust/quote/tests/ui/not-quotable.rs
new file mode 100644
index 0000000000..f991c1883d
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/not-quotable.rs
@@ -0,0 +1,7 @@
+use quote::quote;
+use std::net::Ipv4Addr;
+
+fn main() {
+ let ip = Ipv4Addr::LOCALHOST;
+ let _ = quote! { #ip };
+}
diff --git a/third_party/rust/quote/tests/ui/not-quotable.stderr b/third_party/rust/quote/tests/ui/not-quotable.stderr
new file mode 100644
index 0000000000..35cb6f2b11
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/not-quotable.stderr
@@ -0,0 +1,20 @@
+error[E0277]: the trait bound `Ipv4Addr: ToTokens` is not satisfied
+ --> tests/ui/not-quotable.rs:6:13
+ |
+6 | let _ = quote! { #ip };
+ | ^^^^^^^^^^^^^^
+ | |
+ | the trait `ToTokens` is not implemented for `Ipv4Addr`
+ | required by a bound introduced by this call
+ |
+ = help: the following other types implement trait `ToTokens`:
+ bool
+ char
+ isize
+ i8
+ i16
+ i32
+ i64
+ i128
+ and $N others
+ = note: this error originates in the macro `quote` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/third_party/rust/quote/tests/ui/not-repeatable.rs b/third_party/rust/quote/tests/ui/not-repeatable.rs
new file mode 100644
index 0000000000..a8f0fe773c
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/not-repeatable.rs
@@ -0,0 +1,8 @@
+use quote::quote;
+
+struct Ipv4Addr;
+
+fn main() {
+ let ip = Ipv4Addr;
+ let _ = quote! { #(#ip)* };
+}
diff --git a/third_party/rust/quote/tests/ui/not-repeatable.stderr b/third_party/rust/quote/tests/ui/not-repeatable.stderr
new file mode 100644
index 0000000000..2ed1da0431
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/not-repeatable.stderr
@@ -0,0 +1,35 @@
+error[E0599]: the method `quote_into_iter` exists for struct `Ipv4Addr`, but its trait bounds were not satisfied
+ --> tests/ui/not-repeatable.rs:7:13
+ |
+3 | struct Ipv4Addr;
+ | ---------------
+ | |
+ | method `quote_into_iter` not found for this struct
+ | doesn't satisfy `Ipv4Addr: Iterator`
+ | doesn't satisfy `Ipv4Addr: ToTokens`
+ | doesn't satisfy `Ipv4Addr: ext::RepIteratorExt`
+ | doesn't satisfy `Ipv4Addr: ext::RepToTokensExt`
+...
+7 | let _ = quote! { #(#ip)* };
+ | ^^^^^^^^^^^^^^^^^^ method cannot be called on `Ipv4Addr` due to unsatisfied trait bounds
+ |
+ = note: the following trait bounds were not satisfied:
+ `Ipv4Addr: Iterator`
+ which is required by `Ipv4Addr: ext::RepIteratorExt`
+ `&Ipv4Addr: Iterator`
+ which is required by `&Ipv4Addr: ext::RepIteratorExt`
+ `Ipv4Addr: ToTokens`
+ which is required by `Ipv4Addr: ext::RepToTokensExt`
+ `&mut Ipv4Addr: Iterator`
+ which is required by `&mut Ipv4Addr: ext::RepIteratorExt`
+note: the traits `ToTokens` and `Iterator` must be implemented
+ --> src/to_tokens.rs
+ |
+ | pub trait ToTokens {
+ | ^^^^^^^^^^^^^^^^^^
+ |
+ ::: $RUST/core/src/iter/traits/iterator.rs
+ |
+ | pub trait Iterator {
+ | ^^^^^^^^^^^^^^^^^^
+ = note: this error originates in the macro `$crate::quote_bind_into_iter` which comes from the expansion of the macro `quote` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/third_party/rust/quote/tests/ui/wrong-type-span.rs b/third_party/rust/quote/tests/ui/wrong-type-span.rs
new file mode 100644
index 0000000000..d5601c8a06
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/wrong-type-span.rs
@@ -0,0 +1,7 @@
+use quote::quote_spanned;
+
+fn main() {
+ let span = "";
+ let x = 0i32;
+ quote_spanned!(span=> #x);
+}
diff --git a/third_party/rust/quote/tests/ui/wrong-type-span.stderr b/third_party/rust/quote/tests/ui/wrong-type-span.stderr
new file mode 100644
index 0000000000..12ad307703
--- /dev/null
+++ b/third_party/rust/quote/tests/ui/wrong-type-span.stderr
@@ -0,0 +1,10 @@
+error[E0308]: mismatched types
+ --> tests/ui/wrong-type-span.rs:6:5
+ |
+6 | quote_spanned!(span=> #x);
+ | ^^^^^^^^^^^^^^^^^^^^^^^^^
+ | |
+ | expected `Span`, found `&str`
+ | expected due to this
+ |
+ = note: this error originates in the macro `quote_spanned` (in Nightly builds, run with -Z macro-backtrace for more info)