From 0a0e22235b7ad222be1aaa7765b580f4096c9aeb Mon Sep 17 00:00:00 2001
From: Kevin Mehall <km@kevinmehall.net>
Date: Sat, 20 Mar 2021 12:18:57 -0600
Subject: Make bare underscore token an Ident rather than Punct in proc-macro

---
 crates/proc_macro_srv/src/rustc_server.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'crates/proc_macro_srv/src')

diff --git a/crates/proc_macro_srv/src/rustc_server.rs b/crates/proc_macro_srv/src/rustc_server.rs
index ceefd187d..c147484c0 100644
--- a/crates/proc_macro_srv/src/rustc_server.rs
+++ b/crates/proc_macro_srv/src/rustc_server.rs
@@ -805,5 +805,14 @@ mod tests {
         let t2 = TokenStream::from_str("(a);").unwrap();
         assert_eq!(t2.token_trees.len(), 2);
         assert_eq!(t2.token_trees[0], subtree_paren_a);
+
+        let underscore = TokenStream::from_str("_").unwrap();
+        assert_eq!(
+            underscore.token_trees[0],
+            tt::TokenTree::Leaf(tt::Leaf::Ident(tt::Ident {
+                text: "_".into(),
+                id: tt::TokenId::unspecified(),
+            }))
+        );
     }
 }
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