4 files changed, 93 insertions, 0 deletions
diff --git a/third_party/rust/darling_macro/.cargo-checksum.json b/third_party/rust/darling_macro/.cargo-checksum.json
new file mode 100644
index 0000000000..2f56ee886e
--- /dev/null
+++ b/third_party/rust/darling_macro/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"772583c440b7413dfc8fe74b455978310f5a9b321733c973bdaeb1cd21cfb2ca","LICENSE":"8ea93490d74a5a1b1af3ff71d786271b3f1e5f0bea79ac16e02ec533cef040d6","src/lib.rs":"88141a58dc13b9001a83ca7559b6213ab44641510b6d642a3280c244ad735cec"},"package":"0cd3e432e52c0810b72898296a69d66b1d78d1517dff6cde7a130557a55a62c1"}
+\ No newline at end of file
diff --git a/third_party/rust/darling_macro/Cargo.toml b/third_party/rust/darling_macro/Cargo.toml
new file mode 100644
index 0000000000..61f76a70c3
--- /dev/null
+++ b/third_party/rust/darling_macro/Cargo.toml
@@ -0,0 +1,30 @@
+# 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 believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+name = "darling_macro"
+version = "0.10.1"
+authors = ["Ted Driggs <ted.driggs@outlook.com>"]
+description = "Internal support for a proc-macro library for reading attributes into structs when\nimplementing custom derives. Use https://crates.io/crates/darling in your code.\n"
+license = "MIT"
+repository = "https://github.com/TedDriggs/darling"
+
+[lib]
+proc-macro = true
+[dependencies.darling_core]
+version = "=0.10.1"
+
+[dependencies.quote]
+version = "1"
+
+[dependencies.syn]
+version = "1"
diff --git a/third_party/rust/darling_macro/LICENSE b/third_party/rust/darling_macro/LICENSE
new file mode 100644
index 0000000000..0b48eadc9d
--- /dev/null
+++ b/third_party/rust/darling_macro/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Ted Driggs
+
+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 ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/third_party/rust/darling_macro/src/lib.rs b/third_party/rust/darling_macro/src/lib.rs
new file mode 100644
index 0000000000..629526c553
--- /dev/null
+++ b/third_party/rust/darling_macro/src/lib.rs
@@ -0,0 +1,41 @@
+extern crate proc_macro;
+#[macro_use]
+extern crate syn;
+
+extern crate darling_core;
+
+use proc_macro::TokenStream;
+
+use darling_core::{derive, Error};
+
+#[proc_macro_derive(FromMeta, attributes(darling))]
+pub fn derive_from_meta(input: TokenStream) -> TokenStream {
+    derive::from_meta(&parse_macro_input!(input)).into()
+}
+
+#[proc_macro_derive(FromMetaItem, attributes(darling))]
+pub fn derive_from_meta_item(_input: TokenStream) -> TokenStream {
+    Error::custom("darling::FromMetaItem has been replaced by darling::FromMeta")
+        .write_errors()
+        .into()
+}
+
+#[proc_macro_derive(FromDeriveInput, attributes(darling))]
+pub fn derive_from_input(input: TokenStream) -> TokenStream {
+    derive::from_derive_input(&parse_macro_input!(input)).into()
+}
+
+#[proc_macro_derive(FromField, attributes(darling))]
+pub fn derive_field(input: TokenStream) -> TokenStream {
+    derive::from_field(&parse_macro_input!(input)).into()
+}
+
+#[proc_macro_derive(FromTypeParam, attributes(darling))]
+pub fn derive_type_param(input: TokenStream) -> TokenStream {
+    derive::from_type_param(&parse_macro_input!(input)).into()
+}
+
+#[proc_macro_derive(FromVariant, attributes(darling))]
+pub fn derive_variant(input: TokenStream) -> TokenStream {
+    derive::from_variant(&parse_macro_input!(input)).into()
+}