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Function operator|

boost::mpi::operator| — Computes the union of two process groups.


BOOST_MPI_DECL group operator|(const group & g1, const group & g2);


This routine returns a new group that contains all processes that are either in group g1 or in group g2 (or both). The processes that are in g1 will be first in the resulting group, followed by the processes from g2 (but not also in g1). Equivalent to MPI_Group_union.