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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/53934] New: Better CPP macro diagnostics
Date: Thu, 12 Jul 2012 07:48:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D53934

             Bug #: 53934
           Summary: Better CPP macro diagnostics
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org
        Depends on: 44054, 53552


GCC has (now) for the following C program the nice warning:


foo.c:1:23: error: invalid operands to binary << (have =E2=80=98int=E2=80=
=99 and =E2=80=98double=E2=80=99)
 #define MOVE(a,b)  (a << (b))
                       ^
foo.c:4:7: note: in expansion of macro 'MOVE'
   i =3D MOVE(12,2.2);
       ^
/* ------------------ */
#define MOVE(a,b)  (a << (b))
foo(){
  int i;
  i =3D MOVE(12,2.2);
}



While for Fortran one just gets:

foo.F90:2.14:

i =3D lshift(1, 1.1)
              1
Error: 'shift' argument of 'lshift' intrinsic at (1) must be INTEGER

which is less helpful.


#define MOVE(a,b) lshift(a,b)
integer :: i
i =3D MOVE(1, 1.1)
end


Expected: Something similar. Possibly related to PR44054 and PR53552