[Bug c++/125580] Misspelling the reflection operator as ^ ^ with a space in between gives a confusing error message

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125580

Drea Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2026-06-03
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

Something like this:
```
diff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc
index 03b1ea17683..329ff9b343e 100644
--- a/gcc/cp/parser.cc
+++ b/gcc/cp/parser.cc
@@ -7173,9 +7173,13 @@ cp_parser_primary_expression (cp_parser *parser,
     case CPP_XOR:
       if (cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_XOR)
        {
-         error_at (token->location,
-                   "reflection is only available in C++26 with "
-                   "%<-freflection%>");
+         if (flag_reflection)
+           error_at (token->location,
+                     "%<^^%> requires no whitespace between the two %<^%>");
+         else
+           error_at (token->location,
+                     "reflection is only available in C++26 with "
+                     "%<-freflection%>");
          return error_mark_node;
        }
       gcc_fallthrough ();

```