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FS#140 - DGFParser does not work with Lam-mpi
User who did this: - Christian Engwer (christi)

Attached to Project - Dune
Summary - DGFParser does not work with Lam-mpi
Task Type - Bug Report
Category - DGFParser
Status - Requires testing
Assigned To - 
Operating System - All
Severity - Critical
Priority - High
Reported Version - SVN
Due in Version - 1.0
Due Date - Undecided
Percent Complete - 50%
Details - It seems like the dgf parser silently assumes that MPI_Comm
is convertible to an int.

This is true for mpich where MPI_Comm is just a pointer.
Unfortunately this is be no means supported by the standard.
MPI_Datatype might as well be a class or a struct like in lam-mpi.

The attached code crashed with lam-mpi:

complexity.cc:12: error: invalid conversion from '_comm*' to 'int'
complexity.cc:12: error:   initializing argument 2 of
'Dune::GridPtr<GridType>::GridPtr(const char*, int) [with GridType =
Dune::YaspGrid<2, 2>]'
complexity.cc:13: error: invalid conversion from '_comm*' to 'int'
complexity.cc:13: error:   initializing argument 2 of
'Dune::GridPtr<GridType>::GridPtr(const char*, int) [with GridType =
Dune::YaspGrid<3, 3>]'
complexity.cc:14: error: invalid conversion from '_comm*' to 'int'
complexity.cc:14: error:   initializing argument 2 of
'Dune::GridPtr<GridType>::GridPtr(const char*, int) [with GridType =
Dune::AlbertaGrid<2, 2>]'
complexity.cc:15: error: invalid conversion from '_comm*' to 'int'
complexity.cc:15: error:   initializing argument 2 of
'Dune::GridPtr<GridType>::GridPtr(const char*, int) [with GridType =
Dune::AlbertaGrid<3, 3>]'

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