}
// for predefined types, so refcount_ = 0.
Datatype::Datatype(const char* name, int ident, int size, MPI_Aint lb, MPI_Aint ub, int flags)
: name_(name), id(std::to_string(ident)), size_(size), lb_(lb), ub_(ub), flags_(flags), refcount_(0)
{
}
// for predefined types, so refcount_ = 0.
Datatype::Datatype(const char* name, int ident, int size, MPI_Aint lb, MPI_Aint ub, int flags)
: name_(name), id(std::to_string(ident)), size_(size), lb_(lb), ub_(ub), flags_(flags), refcount_(0)
{