basic_result(basic_result &&)
Move constructor.
Requires: that value_type and error_type both implement a move constructor.
Complexity: Same as for value_type’s and error_type’s move constructors. Constexpr, triviality and noexcept of underlying operations is propagated.
Guarantees: If an exception is thrown during the operation, the object is left in a partially completed state, as per the normal rules for the same operation on a struct.



