1 files changed, 34 insertions, 0 deletions
diff --git a/third_party/rust/async-trait/src/verbatim.rs b/third_party/rust/async-trait/src/verbatim.rs
new file mode 100644
index 0000000000..d064f6ee1f
--- /dev/null
+++ b/third_party/rust/async-trait/src/verbatim.rs
@@ -0,0 +1,34 @@
+use proc_macro2::TokenStream;
+use quote::{ToTokens, TokenStreamExt};
+use syn::parse::{Parse, ParseStream, Result};
+use syn::{Attribute, Signature, Token, Visibility};
+
+pub struct VerbatimFn {
+    pub attrs: Vec<Attribute>,
+    pub vis: Visibility,
+    pub defaultness: Option<Token![default]>,
+    pub sig: Signature,
+    pub semi_token: Token![;],
+}
+
+impl Parse for VerbatimFn {
+    fn parse(input: ParseStream) -> Result<Self> {
+        Ok(VerbatimFn {
+            attrs: input.call(Attribute::parse_outer)?,
+            vis: input.parse()?,
+            defaultness: input.parse()?,
+            sig: input.parse()?,
+            semi_token: input.parse()?,
+        })
+    }
+}
+
+impl ToTokens for VerbatimFn {
+    fn to_tokens(&self, tokens: &mut TokenStream) {
+        tokens.append_all(&self.attrs);
+        self.vis.to_tokens(tokens);
+        self.defaultness.to_tokens(tokens);
+        self.sig.to_tokens(tokens);
+        self.semi_token.to_tokens(tokens);
+    }
+}