| Itasca C++ Interface
    | 
| Public Member Functions | |
| constexpr | unexpected (const unexpected< E > &)=default | 
| constexpr | unexpected (unexpected< E > &&)=default | 
| constexpr const E & | error () const &noexcept | 
| constexpr const E & | error () &noexcept | 
| constexpr const E && | error () const &&noexcept | 
| constexpr E && | error () const &&noexcept | 
| Friends | |
| template<class E2 > | |
| constexpr bool | operator== (const unexpected< E > &x, const unexpected< E2 > &y) |