NAME

       std::experimental::_Optional_base< _Tp, _ShouldProvideDestructor > - Class template that
       holds the necessary state for Optional values and that has the responsibility for
       construction and the special members.

SYNOPSIS

   Public Member Functions
       constexpr _Optional_base (nullopt_t) noexcept
       template<typename... _Args> constexpr _Optional_base (in_place_t, _Args &&... __args)
       template<typename _Up , typename... _Args, enable_if_t< is_constructible< _Tp,
           initializer_list< _Up > &, _Args &&... >::value, int > ...> constexpr _Optional_base
           (in_place_t, initializer_list< _Up > __il, _Args &&... __args)
       _Optional_base (const _Optional_base &__other)
       _Optional_base (_Optional_base &&__other) noexcept(is_nothrow_move_constructible< _Tp >())
       _Optional_base & operator= (const _Optional_base &__other)
       _Optional_base & operator= (_Optional_base &&__other) noexcept(__and_<
           is_nothrow_move_constructible< _Tp >, is_nothrow_move_assignable< _Tp >>())

   Protected Member Functions
       template<typename... _Args> void _M_construct (_Args &&... __args)
           noexcept(is_nothrow_constructible< _Stored_type, _Args... >())
       void _M_destruct ()
       constexpr _Tp & _M_get () noexcept
       constexpr const _Tp & _M_get () const noexcept
       constexpr bool _M_is_engaged () const noexcept
       void _M_reset ()

Detailed Description

   template<typename _Tp, bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
       class std::experimental::_Optional_base< _Tp, _ShouldProvideDestructor >" Class template
       that holds the necessary state for Optional values and that has the responsibility for
       construction and the special members.

       Such a separate base class template is necessary in order to conditionally enable the
       special members (e.g. copy/move constructors). Note that this means that _Optional_base
       implements the functionality for copy and move assignment, but not for converting
       assignment.

       See also:
           optional, _Enable_special_members

       Definition at line 202 of file optional.

Author

       Generated automatically by Doxygen for libstdc++ from the source code.

libstdc++                std::experimental::_Optional0base< _Tp, _ShouldProvideDestructor >(3cxx)