# Something which can receive data directly and efficiently from MPI
#
# Subclasses of `Receptacle` should use the native MPI recveive function,
# without using Nit serialization.
interface Receptacle
	# Type specific receive from MPI
	protected fun recv(mpi: MPI, at, count: Int, source: Rank, tag: Tag, comm: Comm) is abstract

	# Type specific receive and fill buffer from MPI
	protected fun recv_fill(mpi: MPI, source: Rank, tag: Tag, comm: Comm) is abstract
end