bool operator!=(const basic_result<A, B, C> &) const
Returns true if this outcome does not compare equal to the other result. Comparison is done using
error_type if the currently chosen state is the same for both outcome and result, otherwise true is returned. Note that an excepted outcome is always unequal to a result.
operator!= must be a valid expression between
A, and between
void, then so must be
A; similarly for
Complexity: Whatever the underlying
operator!= have. Constexpr and noexcept of underlying operations is propagated.