Create an error handler (function) that throws a C++ exception, then wherever the original code set the error handler to MPI:ERRORS_THROW_EXCEPTIONS, use your new error handler. I haven't looked up the standard here, but it might say that the error handler must return. If it does, then this would not be allowed, otherwise, this should work. -d On Nov 1, 2011, at 4:18 PM, Jeff Hammond wrote:

Can someone explain how one can migrate (backwards) from the C++ to the C bindings if they currently use MPI::Exception in a try-catch block like this:

=================================== try { ((ThreadBase*)(self))->run(); } catch (const MPI::Exception& e) { error("caught an MPI exception"); } ===================================

This is taken from MADNESS, btw.

I think it is only fair for those who want to kill the C++ bindings to provide a clear description of how this will not break existing codes that use C++ bindings. Clearly, many things, e.g. MPI::BYTE -> MPI_BYTE, are trivial, but I see error handling as being fundamentally nontrivial.

Thanks,

Jeff

-- Jeff Hammond Argonne Leadership Computing Facility University of Chicago Computation Institute [email protected] / (630) 252-5381 http://www.linkedin.com/in/jeffhammond https://wiki.alcf.anl.gov/index.php/User:Jhammond _______________________________________________ mpi-forum mailing list [email protected] http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum