|  | 
            Move-construct a posix::basic_descriptor from a descriptor
            of another executor type.
          
template< typename Executor1> basic_descriptor( basic_descriptor< Executor1 > && other, constraint_t< is_convertible< Executor1, Executor >::value, defaulted_constraint > = defaulted_constraint());
This constructor moves a descriptor from one object to another.
                  The other posix::basic_descriptor object
                  from which the move will occur.
                
            Following the move, the moved-from object is in the same state as if
            constructed using the basic_descriptor(const executor_type&)
            constructor.