From 8355fc27ae6216450e374c325b6ca49adf6e2b41 Mon Sep 17 00:00:00 2001
From: Richard Stallman <rms@gnu.org>
Date: Sat, 9 Jan 1993 02:56:59 +0000
Subject: [PATCH] (yylex): Don't allow @ in identifier outside of Objective C.

From-SVN: r3163
---
 gcc/c-lex.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/gcc/c-lex.c b/gcc/c-lex.c
index 4c773e118d8..d8771762d9d 100644
--- a/gcc/c-lex.c
+++ b/gcc/c-lex.c
@@ -1096,11 +1096,15 @@ yylex ()
       p = token_buffer;
       while (isalnum (c) || c == '_' || c == '$' || c == '@')
 	{
-	  if (p >= token_buffer + maxtoken)
-	    p = extend_token_buffer (p);
+	  /* Make sure this char really belongs in an identifier.  */
+	  if (c == '@' && ! doing_objc_thang)
+	    break;
 	  if (c == '$' && ! dollars_in_ident)
 	    break;
 
+	  if (p >= token_buffer + maxtoken)
+	    p = extend_token_buffer (p);
+
 	  *p++ = c;
 	  c = getc (finput);
 	}