gccrs: Handle underscore in MacroMatch.

gcc/rust/ChangeLog:

	* parse/rust-parse-impl.h
	(Parser::parse_macro_match): Handle underscore.

gcc/testsuite/ChangeLog:

	* rust/compile/macro51.rs: New test.

diff --git a/gcc/rust/parse/rust-parse-impl.h b/gcc/rust/parse/rust-parse-impl.h
index 67c4f6a3fabdc3bceebe9c7505b3714e80cc71ba..c48c71f6ca33a55b4f7ba7204819887ca6f9b669 100644 (file)
--- a/gcc/rust/parse/rust-parse-impl.h
+++ b/gcc/rust/parse/rust-parse-impl.h
@@ -2081,6 +2081,7 @@ Parser<ManagedTokenSource>::parse_macro_match ()
          case WHILE:
          case YIELD:
          case IDENTIFIER:
+         case UNDERSCORE:
            // macro fragment
            return parse_macro_match_fragment ();
          case LEFT_PAREN:

diff --git a/gcc/testsuite/rust/compile/macro51.rs b/gcc/testsuite/rust/compile/macro51.rs
new file mode 100644 (file)
index 0000000..6659486
--- /dev/null
+++ b/gcc/testsuite/rust/compile/macro51.rs
@@ -0,0 +1,3 @@
+macro_rules! test {
+    ($_:ident) => {""}
+}