182 template <class T> inline constexpr T&& constexpr_forward(typename std::remove_reference<T>::type& …  in constexpr_forward()  function
187 template <class T> inline constexpr T&& constexpr_forward(typename std::remove_reference<T>::type&&…  in constexpr_forward()  function
275   constexpr storage_t( Args&&... args ) : value_(constexpr_forward<Args>(args)...) {}  in storage_t()
290     constexpr constexpr_storage_t( Args&&... args ) : value_(constexpr_forward<Args>(args)...) {}  in constexpr_storage_t()
309         : init_(true), storage_(constexpr_forward<Args>(args)...) {}  in optional_base()
332       : init_(true), storage_(constexpr_forward<Args>(args)...) {}  in constexpr_optional_base()
427   : OptionalBase<T>(in_place_t{}, constexpr_forward<Args>(args)...) {}  in optional()
431   : OptionalBase<T>(in_place_t{}, il, constexpr_forward<Args>(args)...) {}  in optional()
569     return *this ? **this : detail_::convert<T>(constexpr_forward<V>(v));  in value_or()
577 …ve(const_cast<optional<T>&>(*this).contained_val()) : detail_::convert<T>(constexpr_forward<V>(v));  in value_or()
585 …ve(const_cast<optional<T>&>(*this).contained_val()) : detail_::convert<T>(constexpr_forward<V>(v));  in value_or()
595     return *this ? **this : detail_::convert<T>(constexpr_forward<V>(v));  in value_or()
698     return *this ? **this : detail_::convert<typename decay<T>::type>(constexpr_forward<V>(v));  in value_or()
1001   return optional<typename decay<T>::type>(constexpr_forward<T>(v));  in make_optional()