X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/39fb7e623967922da2fc0a6908dc94ed6e9f4488..20cc714980c65f0035ae8dc60a562d6f86530af1:/src/scan-gram.l

diff --git a/src/scan-gram.l b/src/scan-gram.l
index 9aec298e..2f264f5f 100644
--- a/src/scan-gram.l
+++ b/src/scan-gram.l
@@ -1,7 +1,6 @@
 /* Bison Grammar Scanner                             -*- C -*-
 
-   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free
-   Software Foundation, Inc.
+   Copyright (C) 2002-2011 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -104,8 +103,8 @@ static void unexpected_newline (boundary, char const *);
  /* Bracketed identifiers support. */
 %x SC_BRACKETED_ID SC_RETURN_BRACKETED_ID
 
-letter	  [-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_]
-id	  {letter}({letter}|[0-9])*
+letter	  [.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_]
+id	  {letter}({letter}|[-0-9])*
 directive %{id}
 int	  [0-9]+
 
@@ -560,12 +559,9 @@ splice	 (\\[ \f\t\v]*\n)*
   }
   \\(.|\n)	{
     char const *p = yytext + 1;
-    char quoted_ws[] = "` '";
-    if (isspace (*p) && isprint (*p))
-      {
-        quoted_ws[1] = *p;
-        p = quoted_ws;
-      }
+    /* Quote only if escaping won't make the character visible.  */
+    if (isspace ((unsigned char) *p) && isprint ((unsigned char) *p))
+      p = quote (p);
     else
       p = quotearg_style_mem (escape_quoting_style, p, 1);
     complain_at (*loc, _("invalid character after \\-escape: %s"), p);