Searched defs:__optional (Results 1 – 1 of 1) sorted by relevance
48 struct __optional { struct51 union {55 bool __has_value_ = false;57 __optional() noexcept { in __optional() function60 __optional(__nullopt_t) noexcept { in __optional() function67 __optional(_Up&& __v) noexcept(__nothrow_constructible_from<_Tp, _Up>) { in __optional() function73 __optional(std::in_place_t, _Us&&... __us) in __optional() function78 ~__optional() { in ~__optional()99 auto emplace(_Us&&... __us) noexcept(__nothrow_constructible_from<_Tp, _Us...>) -> _Tp& { in emplace()110 auto __emplace_from(_Fn&& __f, _Args&&... __args) noexcept(__nothrow_callable<_Fn, _Args...>) in __emplace_from()[all …]