libstdc++
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Public Member Functions | |
void | declval ()))) |
template<typename... _Args> | |
void | emplace (_Args &&...__args) |
template<typename _Up , typename... _Args> | |
enable_if_t< is_constructible < _Tp, initializer_list< _Up > &, _Args &&...>::value > | emplace (initializer_list< _Up > __il, _Args &&...__args) |
constexpr | operator bool () const noexcept |
constexpr const _Tp & | operator* () const & |
constexpr _Tp & | operator* ()& |
constexpr _Tp && | operator* ()&& |
constexpr const _Tp && | operator* () const && |
constexpr const _Tp * | operator-> () const |
_Tp * | operator-> () |
optional & | operator= (nullopt_t) noexcept |
template<typename _Up > | |
enable_if_t< is_same< _Tp, decay_t< _Up > >::value, optional & > | operator= (_Up &&__u) |
void | swap (optional &__other) noexcept(is_nothrow_move_constructible< _Tp >()&&noexcept(swap(declval< _Tp & >() |
constexpr const _Tp & | value () const & |
constexpr _Tp & | value ()& |
constexpr _Tp && | value ()&& |
constexpr const _Tp && | value () const && |
template<typename _Up > | |
constexpr _Tp | value_or (_Up &&__u) const & |
template<typename _Up > | |
_Tp | value_or (_Up &&__u)&& |
Private Member Functions | |
void | _Args ()) |
void | _M_construct (_Args &&...__args) noexcept(is_nothrow_constructible< _Stored_type |
void | _M_destruct () |
_M_engaged (true) | |
constexpr _Tp & | _M_get () noexcept |
constexpr const _Tp & | _M_get () const noexcept |
constexpr bool | _M_is_engaged () const noexcept |
void | _M_reset () |
_Optional_base | is_nothrow_move_assignable ()) |
Private Attributes | |
_Empty_byte | _M_empty |
_Stored_type | _M_payload |
Class template for optional values.