[Bug fortran/40039] New: Procedures as actual arguments: Check intent of arguments

[janus at gcc dot gnu dot org]

Consider the following module:


module m

contains

subroutine a(x,f)
  real :: x
  interface
    real function f(y)
      real,intent(in) :: y
    end function
  end interface
  print *,f(x)
end subroutine

real function func(z)
  real,intent(inout) :: z
  func = z**2
end function

subroutine caller
  call a(4.3,func)
end subroutine

end module 


ifort complains:
error #7061: The characteristics of dummy argument 1 of the associated actual
procedure differ from the characteristics of dummy argument 1 of the dummy
procedure. (12.2)   [FUNC]
  call a(4.3,func)

Although gfortran, g95 and sunf95 accept it, I think ifort is right to reject
it (but I haven't checked the standard yet). The same check should also be
applied to procedure pointer assignments.

Btw "gfortran -Wall -Wextra" produces this warning:
test.f90:5: warning: unused parameter ‘f’
This is bogus, because 'f' *is* used in the subroutine a.


-- 
           Summary: Procedures as actual arguments: Check intent of
                    arguments
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: accepts-invalid
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40039