#if defined(__cplusplus) && (201103L <= __cplusplus)

#include <array>

#include <cassert>

#include <vector>

#include "boost/mpi/environment.hpp"

#include "boost/mpi/communicator.hpp"

using std::array;

using std::vector;

namespace mpi = boost::mpi;

struct blob : array<int, 9>, array<double, 3>, array<char, 8> {

};

namespace boost {

namespace mpi {

template <>

struct is_mpi_datatype<blob> : mpl::true_ {

};

template <>

MPI_Datatype get_mpi_datatype<blob>(const blob& b) {

array<unsigned long, 3> block_lengths{

{ 9, 3, 8 }

};

array<MPI_Aint, 3> displacements{

{ 0, 40, 64 }

};

array<MPI_Datatype, 3> datatypes{

{ MPI_INT, MPI_DOUBLE, MPI_CHAR }

};

MPI_Datatype blob_type;

MPI_Type_create_struct(

block_lengths.size()

, reinterpret_cast<int*>(block_lengths.data())

, displacements.data()

, datatypes.data()

, &blob_type);

MPI_Type_commit(&blob_type);

return blob_type;

}

} // namespace mpi

} // namespace boost

#endif // defined(__cplusplus)

int main(int argc, char* argv[]) {

}