299     bool init_;  member
302     constexpr optional_base() noexcept : init_(false), storage_(trivial_init) {};  in optional_base()
304     explicit constexpr optional_base(const T& v) : init_(true), storage_(v) {}  in optional_base()
306     explicit constexpr optional_base(T&& v) : init_(true), storage_(constexpr_move(v)) {}  in optional_base()
309         : init_(true), storage_(constexpr_forward<Args>(args)...) {}  in optional_base()
313         : init_(true), storage_(il, std::forward<Args>(args)...) {}  in optional_base()
315     ~optional_base() { if (init_) storage_.value_.T::~T(); }  in ~optional_base()
322     bool init_;  member
325     constexpr constexpr_optional_base() noexcept : init_(false), storage_(trivial_init) {};  in constexpr_optional_base()
327     explicit constexpr constexpr_optional_base(const T& v) : init_(true), storage_(v) {}  in constexpr_optional_base()
329     explicit constexpr constexpr_optional_base(T&& v) : init_(true), storage_(constexpr_move(v)) {}  in constexpr_optional_base()
332       : init_(true), storage_(constexpr_forward<Args>(args)...) {}  in constexpr_optional_base()
336       : init_(true), storage_(il, std::forward<Args>(args)...) {}  in constexpr_optional_base()
357   constexpr bool initialized() const noexcept { return OptionalBase<T>::init_; }  in initialized()
377     OptionalBase<T>::init_ = false;  in clear()
383     assert(!OptionalBase<T>::init_);  in initialize()
385     OptionalBase<T>::init_ = true;  in initialize()
391     assert(!OptionalBase<T>::init_);  in initialize()
393     OptionalBase<T>::init_ = true;  in initialize()
408         OptionalBase<T>::init_ = true;  in optional()
417         OptionalBase<T>::init_ = true;  in optional()