preprocessor/8449: Ellipsis in 3...5 not recognized properly

[ehrhardt@mathematik.uni-ulm.de]

>Number:         8449
>Category:       preprocessor
>Synopsis:       Ellipsis in 3...5 not recognized properly
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Mon Nov 04 08:26:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Christian Ehrhardt
>Release:        gcc-3.2
>Organization:
>Environment:
Reading specs from /usr/local/bin/../lib/gcc-lib/sparc-sun-solaris2.9/3.2/specs
Configured with: /export/local/manager/playground/ULMgcc32/src/gcc-3.2/configure --with-ld=/usr/local/bin/ld --with-gnu-ld --with-as=/usr/local/bin/as --with-gnu-as --prefix=/usr/local/
Thread model: posix
gcc version 3.2
SunOS perseus 5.9 Generic_112233-01 sun4u sparc SUNW,Ultra-5_10
>Description:
Compiling this:

int a[2] = {[0 ...1]=1};

with gcc -c t.c gives an error:
gcc -c t9.c
t9.c:1: too many decimal points in floating constant
The cause is quite obious: The ellipsis is parsed as part of the
number. Something along these lines might fix it (only compile tested
as of yet)

--- cpplex.c.old	Mon Nov  4 17:15:08 2002
+++ cpplex.c	Mon Nov  4 17:14:45 2002
@@ -527,6 +527,7 @@
 {
   cpp_buffer *buffer = pfile->buffer;
   unsigned char *dest, *limit;
+  int dotdot = 0;
 
   dest = BUFF_FRONT (pfile->u_buff);
   limit = BUFF_LIMIT (pfile->u_buff);
@@ -547,6 +548,11 @@
     {
       do
 	{
+	  /* Is this potentially an ellipsis? */
+	  if (c == '.' && *(buffer->cur+1) == '.') {
+	    dotdot = 1;
+	    break;
+	  }
 	  /* Need room for terminating null.  */
 	  if ((size_t) (limit - dest) < 2)
 	    {
@@ -563,6 +569,8 @@
 
       /* Potential escaped newline?  */
       buffer->backup_to = buffer->cur - 1;
+      if (dotdot)
+        break;
       if (c != '?' && c != '\\')
 	break;
       c = skip_escaped_newlines (pfile);
>How-To-Repeat:
See above.
>Fix:
Add a space before the ellipsis.
>Release-Note:
>Audit-Trail:
>Unformatted: