Lines Matching refs:nullopt_t

29     struct nullopt_t{see below};
30     constexpr nullopt_t nullopt(unspecified);
50     template <class T> constexpr bool operator==(const optional<T>&, nullopt_t) noexcept;
51     template <class T> constexpr bool operator==(nullopt_t, const optional<T>&) noexcept;
52     template <class T> constexpr bool operator!=(const optional<T>&, nullopt_t) noexcept;
53     template <class T> constexpr bool operator!=(nullopt_t, const optional<T>&) noexcept;
54     template <class T> constexpr bool operator<(const optional<T>&, nullopt_t) noexcept;
55     template <class T> constexpr bool operator<(nullopt_t, const optional<T>&) noexcept;
56     template <class T> constexpr bool operator<=(const optional<T>&, nullopt_t) noexcept;
57     template <class T> constexpr bool operator<=(nullopt_t, const optional<T>&) noexcept;
58     template <class T> constexpr bool operator>(const optional<T>&, nullopt_t) noexcept;
59     template <class T> constexpr bool operator>(nullopt_t, const optional<T>&) noexcept;
60     template <class T> constexpr bool operator>=(const optional<T>&, nullopt_t) noexcept;
61     template <class T> constexpr bool operator>=(nullopt_t, const optional<T>&) noexcept;
89 	  constexpr optional(nullopt_t) noexcept;
102 	  optional& operator=(nullopt_t) noexcept;
179 struct nullopt_t
181     explicit constexpr nullopt_t(int) noexcept {}
184 constexpr nullopt_t nullopt{0};
307     static_assert(!is_same<typename remove_cv<value_type>::type, nullopt_t>::value,
308               "Instantiation of optional with a nullopt_t type is ill-formed.");
318     _LIBCPP_INLINE_VISIBILITY constexpr optional(nullopt_t) noexcept {}
347     optional& operator=(nullopt_t) noexcept
661 operator==(const optional<_Tp>& __x, nullopt_t) noexcept
670 operator==(nullopt_t, const optional<_Tp>& __x) noexcept
679 operator!=(const optional<_Tp>& __x, nullopt_t) noexcept
688 operator!=(nullopt_t, const optional<_Tp>& __x) noexcept
697 operator<(const optional<_Tp>&, nullopt_t) noexcept
706 operator<(nullopt_t, const optional<_Tp>& __x) noexcept
715 operator<=(const optional<_Tp>& __x, nullopt_t) noexcept
724 operator<=(nullopt_t, const optional<_Tp>&) noexcept
733 operator>(const optional<_Tp>& __x, nullopt_t) noexcept
742 operator>(nullopt_t, const optional<_Tp>&) noexcept
751 operator>=(const optional<_Tp>&, nullopt_t) noexcept
760 operator>=(nullopt_t, const optional<_Tp>& __x) noexcept