Currently, the API does not expose displacement options for collective operations such as allgather, gather and scatter. There is a corresponding MPI function, with displacement options, available for each of these operations.
As a suggestion, the displacement could be passed via a flag mpi::flag::payload::displaced_t, which should carry the displacement factor. By using a flag, we guarantee that no other flag-enabled mode is used, thus avoiding API inconsistencies.
Currently, the API does not expose displacement options for collective operations such as
allgather,gatherandscatter. There is a corresponding MPI function, with displacement options, available for each of these operations.As a suggestion, the displacement could be passed via a flag
mpi::flag::payload::displaced_t, which should carry the displacement factor. By using a flag, we guarantee that no other flag-enabled mode is used, thus avoiding API inconsistencies.