From: Yap Zhi Heng <[email protected]>
gcc/rust/ChangeLog:
* expand/rust-macro-expand.cc (transcribe_expression
(Parser<MacroInvocLexer>)):
Prevent the same trailing semicolon warning from being generated at the
same loc.
Signed-Off-By: Yap Zhi Heng <[email protected]>
---
gcc/rust/expand/rust-macro-expand.cc | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/gcc/rust/expand/rust-macro-expand.cc
b/gcc/rust/expand/rust-macro-expand.cc
index 2ab9d2541dc..30373722e8c 100644
--- a/gcc/rust/expand/rust-macro-expand.cc
+++ b/gcc/rust/expand/rust-macro-expand.cc
@@ -1012,9 +1012,14 @@ transcribe_expression (Parser<MacroInvocLexer> &parser)
// FIXME: make this an error for some edititons
if (parser.peek_current_token ()->get_id () == SEMICOLON)
{
- rust_warning_at (
- parser.peek_current_token ()->get_locus (), 0,
- "trailing semicolon in macro used in expression context");
+ // TODO bandaid for now, make this a member for MacroExpander instead in
+ // the future
+ static std::unordered_set<location_t> warned_loc;
+ auto locus = parser.peek_current_token ()->get_locus ();
+ if (warned_loc.insert (locus).second)
+ rust_warning_at (
+ parser.peek_current_token ()->get_locus (), 0,
+ "trailing semicolon in macro used in expression context");
parser.skip_token ();
}
--
2.50.1
