boost::has_move_emulation_enabled
// In header: <boost/move/core.hpp> template<typename T> struct has_move_emulation_enabled { // public data members static const bool value; };
This trait yields to a compile-time true boolean if T was marked as BOOST_MOVABLE_BUT_NOT_COPYABLE or BOOST_COPYABLE_AND_MOVABLE and rvalue references are not available on the platform. False otherwise.