Template Class optional< T & >

• Defined in File Optional.h

Class Documentation

template<class T>
class optional<T&>

Public Functions

inline constexpr optional() noexcept

inline constexpr optional(nullopt_t) noexcept

template<typename U = T>
inline constexpr optional(U &u) noexcept

template<typename U = T>
optional(U&&) = delete

inline constexpr optional(const optional &rhs) noexcept

inline explicit constexpr optional(in_place_t, T &v) noexcept

explicit optional(in_place_t, T&&) = delete

~optional() = default

inline optional &operator=(nullopt_t) noexcept

template<typename U, typename = std::enable_if_t<std::is_same_v<typename std::decay<U>::type, optional<T&>>>>
inline optional &operator=(U &&rhs) noexcept

template<typename U>
auto operator=(U &&rhs) noexcept -> typename std::enable_if<!std::is_same<typename std::decay<U>::type, optional<T&>>::value, optional&>::type = delete

inline void emplace(T &v) noexcept

void emplace(T&&) = delete

inline void swap(optional<T&> &rhs) noexcept

inline constexpr T *operator->() const

inline constexpr T &operator*() const

inline constexpr T &value() const

inline explicit constexpr operator bool() const noexcept

inline constexpr bool has_value() const noexcept

template<class V>
inline constexpr std::decay<T>::type value_or(V &&v) const

inline void reset() noexcept