Superior *printf-fu lets us avoid modifying source code.

p4raw-id: //depot/perl@27452

diff --git a/toke.c b/toke.c
index d87f7da..8ee3b84 100644 (file)
--- a/toke.c
+++ b/toke.c
@@ -1089,15 +1089,10 @@ S_check_uni(pTHX)
     if ((t = strchr(s, '(')) && t < PL_bufptr)
        return;
 
-    /* XXX Things like this are just so nasty.  We shouldn't be modifying
-    source code, even if we realquick set it back. */
     if (ckWARN_d(WARN_AMBIGUOUS)){
-       const char ch = *s;
-        *s = '\0';
         Perl_warner(aTHX_ packWARN(WARN_AMBIGUOUS),
-                  "Warning: Use of \"%s\" without parentheses is ambiguous",
-                  PL_last_uni);
-        *s = ch;
+                  "Warning: Use of \"%.*s\" without parentheses is ambiguous",
+                  (int)(s - PL_last_uni), PL_last_uni);
     }
 }