tranferability constrain mixin

mixin.hh

namespace mixin
{
	struct no_copy_ctor { no_copy_ctor() = default; no_copy_ctor(no_copy_ctor const&) = delete; };
	struct no_copy_assign { no_copy_assign& operator=(no_copy_assign const&) = delete; };
	struct non_copyable : no_copy_ctor, no_copy_assign {};

	struct no_move_ctor { no_move_ctor() = default; no_move_ctor(no_move_ctor &&) = delete; };
	struct no_move_assign { no_move_assign& operator=(no_move_assign &&) = delete; };
	struct non_movable : no_move_ctor, no_move_assign {};

	struct non_transferable : non_copyable, non_movable {};
}