Re: Does F90 do type checking when calling module subroutines?

Neilen Marais wrote: 
Hi

I was under the impression that if you call subroutines from modules, f90
would check the call paramter types?  I'm using Intel fortran under linux.
I have a subroutine defined in a module like this:

MODULE parseinput
.
.
.
  INTERFACE read_namelists
     MODULE PROCEDURE read_namelists
  END INTERFACE
.
.
.
CONTAINS

  SUBROUTINE read_namelists(infile)
    IMPLICIT NONE
    INTEGER(I4B), INTENT(in) :: infile


In another .f90 file, I included this subroutine with a USE parseinput
statement. [...]


    In addition to what Richard Maine said, I have some uneasiness
about the last sentence quoted above.  If you know all this, pardon
my saying the obvious, but just to eliminate all sources of error...

    F90 does not have a concept of "source file" as does C/C++.
It is important that the "USE parseinput" statement be present in
*every* subroutine or function, or the main program, that calls
read_namelists.  Secondly, the USE statement does *not* include
the subroutine read_namelists.  What it does is make any module
parameters or variables visible to the compiler, and the _interfaces_
for any module procedures defined in the module.  That's a lot
different than, e.g., _including_ the source code for the subroutine.

	-Ken
--
I don't speak for Intel, Intel doesn't speak for me...

Ken Fairfield
D1C Automation VMS System Support
who:   kenneth dot h dot fairfield
where: intel dot com
.

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