(j3.2006) C interoperability idea from a colleague
Tue Apr 14 00:37:32 EDT 2015
On Apr 13, 2015, at 7:53 PM, Van Snyder <van.snyder at jpl.nasa.gov> wrote:
> A colleague would like to reference a Fortran subroutine that has
> several optional arguments from C.
> I referred him to the "Further Interoperability" TS.
> He asked if he had to provide a descriptor for every argument, not just
> the ones that are present.
Optional arguments that are not present are represented by a NULL pointer, not a descriptor.
> I said that's the way it is.
> He suggested that the descriptor ought to include the Fortran argument
> name, and the called Fortran subroutine ought to work out which
> arguments are present.
> I don't know whether that's practical, or not incompatible with what we
> did, but it is interesting.
> J3 mailing list
> J3 at mailman.j3-fortran.org
Bill Long longb at cray.com
Fortran Technical Suport & voice: 651-605-9024
Bioinformatics Software Development fax: 651-605-9142
Cray Inc./ Cray Plaza, Suite 210/ 380 Jackson St./ St. Paul, MN 55101
More information about the J3