[Bug fortran/24759] New: Unclear error message

[Bug fortran/24759] New: Unclear error message

[schnetter at aei dot mpg dot de]

The code

subroutine a (emask)
  implicit none
  real, intent(in) :: emask(:,:,:)
  logical :: left(3), right(3)
  integer :: i,j,k
  i=1; j=1; k=1
  left=.false.
  right=.false.
  if (.not.right(3)) left(1) = abs(emask(i,j,k+1)-1)<0.01)
end subroutine a

contains an error in the if statement.  The last closing parenthesis in this
line must not be there.  When compiled with gfortran, the error message is

$ ~/gcc/bin/gfortran --version
GNU Fortran 95 (GCC) 4.1.0 20051030 (experimental)

$ ~/gcc/bin/gfortran -c unclassifyable.f90 
 In file unclassifyable.f90:9

  if (.not.right(3)) left(1) = abs(emask(i,j,k+1)-1)<0.01)
                    1
Error: Unclassifiable statement in IF-clause at (1)

This may be technically correct, but I wonder whether it would be possible to
count parentheses and detect the mismatch.  I'm aware of the fact that
classifying statements in Fortran requires e.g. looking for equal signs and
commas that are not enclosed in parentheses, so that mismatching parantheses
can throw the classifier off.  But the classifier probably already contains
parentheses matching code, and reporting the mismatch would lead to a better
error message.


-- 
           Summary: Unclear error message
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: schnetter at aei dot mpg dot de
 GCC build triplet: powerpc-apple-darwin8.3.0
  GCC host triplet: powerpc-apple-darwin8.3.0
GCC target triplet: powerpc-apple-darwin8.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24759

[Bug fortran/24759] Unclear error message for a syntax error

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2005-11-09 17:39 -------
I notice that we give an unclassifiable error almost any time there is a syntax
error.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |diagnostic
   Last reconfirmed|0000-00-00 00:00:00         |2005-11-09 17:39:53
               date|                            |
            Summary|Unclear error message       |Unclear error message for a
                   |                            |syntax error


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24759

[Bug fortran/24759] Unclear error message for a syntax error

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-01-03 17:04 -------
Not PPC specific.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  GCC build triplet|powerpc-apple-darwin8.3.0   |
   GCC host triplet|powerpc-apple-darwin8.3.0   |
 GCC target triplet|powerpc-apple-darwin8.3.0   |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24759

[Bug fortran/24759] Unclear error message for a syntax error

[dfranke at gcc dot gnu dot org]

------- Comment #3 from dfranke at gcc dot gnu dot org  2007-12-21 22:17 -------
Fixed by Jerry. Closing as dupe.

*** This bug has been marked as a duplicate of 34325 ***


-- 

dfranke at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24759