[MPIWG Fortran] pair types proposal

[Jeff Hammond]

MPI needs to know about the Fortran type.  That's what this routine does.
It does not create the Fortran type.  Just view this as a special case of
MPI_Type_create_struct.

We could just use BIND(C) but then I have to add the pair type constructor
for C.  I was planning to do that but haven't typed it.

Jeff

On Fri, Nov 10, 2017 at 11:53 AM, Bill Long <longb at cray.com> wrote:

> Fortran 90 had derived types, and Fortran 2003 had BIND(C) derived types -
> essentially C structs.  I don’t see the logic of inventing an archaic
> “create type” routine when the user could just declared the required type
> directly.
>
> Cheers,
> Bill
>
>
> > On Nov 10, 2017, at 1:34 PM, Jeff Hammond <jeff.science at gmail.com>
> wrote:
> >
> > Given that Fortran 90+ has user-defined types, I don't see any reason
> why we can't allow these to be used to make MPI_M**LOC reductions more
> useful in Fortran.  See the following ticket for details.  Please add
> comments to the GitHub issue.
> >
> > https://github.com/mpi-forum/mpi-issues/issues/70
> >
> > Thanks,
> >
> > Jeff
> >
> > --
> > Jeff Hammond
> > jeff.science at gmail.com
> > http://jeffhammond.github.io/
> > _______________________________________________
> > mpiwg-fortran mailing list
> > mpiwg-fortran at lists.mpi-forum.org
> > https://lists.mpi-forum.org/mailman/listinfo/mpiwg-fortran
>
> Bill Long
>      longb at cray.com
> Principal Engineer, Fortran Technical Support &   voice:  651-605-9024
> Bioinformatics Software Development                      fax:  651-605-9143
> Cray Inc./ 2131 Lindau Lane/  Suite 1000/  Bloomington, MN  55425
>
>
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-- 
Jeff Hammond
jeff.science at gmail.com
http://jeffhammond.github.io/
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