libstdc++
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Public Types | |
using | value_type = _Tp |
Public Member Functions | |
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) |
void && | noexcept (swap(declval< _Tp & >(), declval< _Tp & >()))) |
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) |
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 | _M_destruct () |
constexpr _Tp & | _M_get () noexcept |
constexpr const _Tp & | _M_get () const noexcept |
constexpr bool | _M_is_engaged () const noexcept |
void | _M_reset () |
Private Attributes | |
_Empty_byte | _M_empty |
this | _M_engaged |
_Stored_type | _M_payload |
void | |
Class template for optional values.