re PR fortran/13257 ([4.0 only] Error instead of warning for missing comma in format string)

PR fortran/13257

fortran/ChangeLog:
	* io.c (check_format): Allow an optional comma
	between descriptors.

libgfortran/ChangeLog:
	* format.c (parse_format_list): Allow an optional comma
	between descriptors.

testsuite/ChangeLog:
	* comma_format_extension_[1234].f: New tests.

From-SVN: r97919

gcc/fortran/ChangeLog

+2005-04-09  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	PR fortran/13257
+	* io.c (check_format): Allow an optional comma
+	between descriptors.
+
 2005-04-09  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
 
 	* match.c (match_arithmetic_if): Remove gfc_ prefix and correct

gcc/fortran/io.c

@@ -433,6 +433,7 @@ check_format (void)
 format_item:
   /* In this state, the next thing has to be a format item.  */
   t = format_lex ();
+format_item_1:
   switch (t)
     {
     case FMT_POSINT:
@@ -701,8 +702,10 @@ between_desc:
       goto syntax;
 
     default:
-      error = "Missing comma";
-      goto syntax;
+      if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
+	  == FAILURE)
+	return FAILURE;
+      goto format_item_1;
     }
 
 optional_comma:

gcc/testsuite/ChangeLog

+2005-04-09  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	PR fortran/13257
+	* comma_format_extension_[1234].f: New tests.
+
 2005-04-09  Jakub Jelinek  <jakub@redhat.com>
 
 	* gcc.dg/tree-ssa/stdarg-1.c: New test.

gcc/testsuite/gfortran.dg/comma_format_extension_1.f

+! { dg-do compile }
+! { dg-options "" }
+! test that the extension for a missing comma is accepted
+
+      subroutine mysub
+      dimension ibar(5)
+      write (3,1001) ( ibar(m), m = 1, 5 )
+
+ 1001 format (/5x,' ',i4' '/ )
+      return
+      end

gcc/testsuite/gfortran.dg/comma_format_extension_2.f

+! { dg-do compile }
+! test that the extension for a missing comma is accepted
+
+      subroutine mysub
+      dimension ibar(5)
+      write (3,1001) ( ibar(m), m = 1, 5 )
+
+ 1001 format (/5x,' ',i4' '/ ) ! { dg-warning "Missing comma" }
+      return
+      end

gcc/testsuite/gfortran.dg/comma_format_extension_3.f

+! PR libfortran/15332 and PR fortran/13257
+! We used to accept this as an extension but
+! did do the correct thing at runtime.
+! Note the missing , before i1 in the format.
+! { do-do run }
+! { dg-options "" }
+      character*12 c
+
+      write (c,100) 0, 1
+      if (c .ne. 'i = 0, j = 1') call abort
+      
+      write (c,100) 0
+      if (c .ne. 'i = 0       ') call abort
+
+ 100  format ('i = 'i1,:,', j = ',i1)
+      end

gcc/testsuite/gfortran.dg/comma_format_extension_4.f

+! PR fortran/13257
+! Note the missing , before i1 in the format.
+! { do-do run }
+! { dg-options "" }
+      character*5 c
+      write (c,1001) 1
+      if (c .ne. '    1 ') call abort
+
+ 1001 format (' ',i4' ')
+      end

libgfortran/ChangeLog

+2005-04-09  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	PR fortran/13257
+	* format.c (parse_format_list): Allow an optional comma
+	between descriptors.
+
 2005-04-08  Eric Botcazou  <ebotcazou@libertysurf.fr>
 
 	* io/backspace.c (unformatted_backspace): Do not dereference

libgfortran/io/format.c

@@ -452,6 +452,7 @@ parse_format_list (void)
   /* Get the next format item */
  format_item:
   t = format_lex ();
+ format_item_1:
   switch (t)
     {
     case FMT_POSINT:
@@ -853,8 +854,8 @@ parse_format_list (void)
       goto finished;
 
     default:
-      error = "Missing comma in format";
-      goto finished;
+      /* Assume a missing comma, this is a GNU extension */
+      goto format_item_1;
     }
 
   /* Optional comma is a weird between state where we've just finished