[Mpi-forum] C++ types inaccessible after #281

[Jim Dinan]

Hi Doug,

Apologies if I'm missing something, but this seems to be the same 
situation as the Fortan types, which can be used in the C interface.  If 
the user can't supply the needed compiler in a particular build, then an 
implementation should be free to disable these types.

  ~Jim.

On 6/26/12 11:41 AM, Douglas Miller wrote:
> I've got to raise a concern here. If we start defining MPI datatypes to
> be C++ types then how will an implementation support that with only a C
> compiler? I thought the point of 281 was to eradicate C++ from the
> standard (and start over later if C++ was to be defined in the standard).
>
>
> _______________________________________________
> Douglas Miller                  BlueGene Messaging Development
> IBM Corp., Rochester, MN USA                     Bldg 030-2 A401
> dougmill at us.ibm.com               Douglas Miller/Rochester/IBM
>
> Inactive hide details for Jed Brown ---06/26/2012 11:26:16 AM---Jed
> Brown <jedbrown at mcs.anl.gov>Jed Brown ---06/26/2012 11:26:16 AM---Jed
> Brown <jedbrown at mcs.anl.gov>
>
>     *Jed Brown <jedbrown at mcs.anl.gov>*
>     Sent by: mpi-forum-bounces at lists.mpi-forum.org
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>     06/26/2012 11:14 AM
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>     Re: [Mpi-forum] C++ types inaccessible after #281
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> On Tue, Jun 26, 2012 at 6:13 AM, Jeff Squyres <_jsquyres at cisco.com_
> <mailto:jsquyres at cisco.com>> wrote:
>
>     There are a few C++-specific datatypes for which it would be worth
>     introducing new C datatypes (e.g., MPI_CXX_COMPLEX).  It's too bad
>     that no one realized this until now, because this won't make the
>     MPI-3 deadline.  But it could be part of MPI-3.1 or errata, or some
>     such.
>
>
> Two people in offline discussions have suggested that C bindings to the
> std::complex types (I'm not aware of anything else that #281 will lose)
> might qualify as ticket 0._______________________________________________
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