[Bug fortran/52295] New: Allow internal procedure in generic interfaces

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52295

             Bug #: 52295
           Summary: Allow internal procedure in generic interfaces
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: diagnostic, patch, rejects-valid
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org


Found at
http://groups.google.com/group/comp.lang.fortran/browse_thread/thread/408949dd41f76a86

gfortran rejects internal procedures in generic interfaces with -std=2008, but
that's valid since F2008.

Fortran 2003:

C1207 (R1206) A procedure-name shall have an explicit interface and shall refer
to an accessible procedure pointer, external procedure, dummy procedure, or
module procedure.

Fortran 2008:

C1207 (R1206) A procedure-name shall be a nonintrinsic procedure that has an
explicit interface.


Untested patch:

--- interface.c (revision 184331)
+++ interface.c (working copy)
@@ -1292,9 +1292,10 @@
          return 1;
        }

+      /* F2003, C1207. F2008, C1207.  */
       if (p->sym->attr.proc == PROC_INTERNAL
-         && gfc_notify_std (GFC_STD_GNU, "Extension: Internal procedure '%s' "
-                            "in %s at %L", p->sym->name, interface_name,
+         && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: Internal procedure "
+                            "'%s' in %s at %L", p->sym->name, interface_name,
                             &p->sym->declared_at) == FAILURE)
        return 1;
     }