1 files changed, 61 insertions, 0 deletions
diff --git a/third_party/rust/futures-macro/src/lib.rs b/third_party/rust/futures-macro/src/lib.rs
new file mode 100644
index 0000000000..0afe34b83b
--- /dev/null
+++ b/third_party/rust/futures-macro/src/lib.rs
@@ -0,0 +1,61 @@
+//! The futures-rs procedural macro implementations.
+
+#![warn(rust_2018_idioms, single_use_lifetimes, unreachable_pub)]
+#![doc(test(
+    no_crate_inject,
+    attr(
+        deny(warnings, rust_2018_idioms, single_use_lifetimes),
+        allow(dead_code, unused_assignments, unused_variables)
+    )
+))]
+
+// Since https://github.com/rust-lang/cargo/pull/7700 `proc_macro` is part of the prelude for
+// proc-macro crates, but to support older compilers we still need this explicit `extern crate`.
+#[allow(unused_extern_crates)]
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+
+mod executor;
+mod join;
+mod select;
+mod stream_select;
+
+/// The `join!` macro.
+#[proc_macro]
+pub fn join_internal(input: TokenStream) -> TokenStream {
+    crate::join::join(input)
+}
+
+/// The `try_join!` macro.
+#[proc_macro]
+pub fn try_join_internal(input: TokenStream) -> TokenStream {
+    crate::join::try_join(input)
+}
+
+/// The `select!` macro.
+#[proc_macro]
+pub fn select_internal(input: TokenStream) -> TokenStream {
+    crate::select::select(input)
+}
+
+/// The `select_biased!` macro.
+#[proc_macro]
+pub fn select_biased_internal(input: TokenStream) -> TokenStream {
+    crate::select::select_biased(input)
+}
+
+// TODO: Change this to doc comment once rustdoc bug fixed: https://github.com/rust-lang/futures-rs/pull/2435
+// The `test` attribute.
+#[proc_macro_attribute]
+pub fn test_internal(input: TokenStream, item: TokenStream) -> TokenStream {
+    crate::executor::test(input, item)
+}
+
+/// The `stream_select!` macro.
+#[proc_macro]
+pub fn stream_select_internal(input: TokenStream) -> TokenStream {
+    crate::stream_select::stream_select(input.into())
+        .unwrap_or_else(syn::Error::into_compile_error)
+        .into()
+}