Manpages - std_experimental_optional.3

using value_type = _Tp

template<typename _Up = _Tp, enable_if_t*< __and_< __not_< *is_same*< *optional*< _Tp >, *decay_t*< _Up > > >, *is_constructible*< _Tp, _Up && >, *is_convertible*< _Up &&, _Tp > >::value, bool > = true> constexpr *optional (_Up &&__t)

template<typename _Up = _Tp, enable_if_t*< __and_< __not_< *is_same*< *optional*< _Tp >, *decay_t*< _Up > > >, *is_constructible*< _Tp, _Up && >, __not_< *is_convertible*< _Up &&, _Tp > > >::value, bool > = false> constexpr *optional (_Up &&__t)

template<typename _Up , enable_if_t*< __and_< __not_< *is_same*< _Tp, _Up > >, *is_constructible*< _Tp, const _Up & >, *is_convertible*< const _Up &, _Tp >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = true> constexpr *optional (const *optional*< _Up > &__t)

template<typename _Up , enable_if_t*< __and_< __not_< *is_same*< _Tp, _Up > >, *is_constructible*< _Tp, const _Up & >, __not_< *is_convertible*< const _Up &, _Tp > >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = false> constexpr *optional (const *optional*< _Up > &__t)

template<typename _Up , enable_if_t*< __and_< __not_< *is_same*< _Tp, _Up > >, *is_constructible*< _Tp, _Up && >, *is_convertible*< _Up &&, _Tp >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = true> constexpr *optional (*optional*< _Up > &&__t)

template<typename _Up , enable_if_t*< __and_< __not_< *is_same*< _Tp, _Up > >, *is_constructible*< _Tp, _Up && >, __not_< *is_convertible*< _Up &&, _Tp > >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = false> constexpr *optional (*optional*< _Up > &&__t)

template<typename… _Args> enable_if_t*< *is_constructible*< _Tp, _Args &&… >::value > *emplace (_Args &&… __args)

template<typename _Up , typename… _Args> enable_if_t*< *is_constructible*< _Tp, *initializer_list*< _Up > &, _Args &&… >::value > *emplace (*initializer_list*< _Up > __il, _Args &&… __args)

constexpr operator bool () const noexcept

constexpr _Tp & operator* () &

constexpr _Tp && operator* () &&

constexpr const _Tp & operator* () const &

constexpr const _Tp && operator* () const &&

_Tp * operator-> ()

constexpr const _Tp * operator-> () const

template<typename _Up = _Tp> enable_if_t*< __and_< __not_< *is_same*< *optional*< _Tp >, *decay_t*< _Up > > >, *is_constructible*< _Tp, _Up >, __not_< __and_< *is_scalar*< _Tp >, *is_same*< _Tp, *decay_t*< _Up > > > >, *is_assignable*< _Tp &, _Up > >::value, *optional & > operator= (_Up &&__u)

template<typename _Up > enable_if_t*< __and_< __not_< *is_same*< _Tp, _Up > >, *is_constructible*< _Tp, const _Up & >, *is_assignable*< _Tp &, _Up >, __not_< __converts_from_optional< _Tp, _Up > >, __not_< __assigns_from_optional< _Tp, _Up > > >::value, *optional & > operator= (const *optional*< _Up > &__u)

optional & operator= (nullopt_t) noexcept

template<typename _Up > enable_if_t*< __and_< __not_< *is_same*< _Tp, _Up > >, *is_constructible*< _Tp, _Up >, *is_assignable*< _Tp &, _Up >, __not_< __converts_from_optional< _Tp, _Up > >, __not_< __assigns_from_optional< _Tp, _Up > > >::value, *optional & > operator= (*optional*< _Up > &&__u)

void swap (optional &__other) noexcept(*is_nothrow_move_constructible*< _Tp >() &&__is_nothrow_swappable< _Tp >::value)

constexpr _Tp & value () &

constexpr _Tp && value () &&

constexpr const _Tp & value () const &

constexpr const _Tp && value () const &&

template<typename _Up > _Tp value_or (_Up &&__u) &&

template<typename _Up > constexpr _Tp value_or (_Up &&__u) const &

class std::experimental::optional< _Tp >“Class template for optional values.

Definition at line 428 of file experimental/optional.

>::value_type = _Tp Definition at line 451 of file experimental/optional.

__and_< __not_< is_same*< *optional*< _Tp >, *decay_t*< _Up > > >, *is_constructible*< _Tp, _Up && >, *is_convertible*< _Up &&, _Tp > >::value, bool > = true> constexpr *std::experimental::optional*< _Tp >::*optional (_Up && __t)= [inline]=, = [constexpr]= Definition at line 464 of file experimental/optional.

__and_< __not_< is_same*< *optional*< _Tp >, *decay_t*< _Up > > >, *is_constructible*< _Tp, _Up && >, __not_< *is_convertible*< _Up &&, _Tp > > >::value, bool > = false> constexpr *std::experimental::optional*< _Tp >::*optional (_Up && __t)= [inline]=, = [explicit]=, = [constexpr]= Definition at line 473 of file experimental/optional.

__and_< __not_< is_same*< _Tp, _Up > >, *is_constructible*< _Tp, const _Up & >, *is_convertible*< const _Up &, _Tp >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = true> constexpr *std::experimental::optional*< _Tp >::*optional (const optional*< _Up > & __t)= [inline]=, = [constexpr]= Definition at line *483 of file experimental/optional.

__and_< __not_< is_same*< _Tp, _Up > >, *is_constructible*< _Tp, const _Up & >, __not_< *is_convertible*< const _Up &, _Tp > >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = false> constexpr *std::experimental::optional*< _Tp >::*optional (const optional*< _Up > & __t)= [inline]=, = [explicit]=, = [constexpr]= Definition at line *496 of file experimental/optional.

__and_< __not_< is_same*< _Tp, _Up > >, *is_constructible*< _Tp, _Up && >, *is_convertible*< _Up &&, _Tp >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = true> constexpr *std::experimental::optional*< _Tp >::*optional (optional*< _Up > && __t)= [inline]=, = [constexpr]= Definition at line *509 of file experimental/optional.

__and_< __not_< is_same*< _Tp, _Up > >, *is_constructible*< _Tp, _Up && >, __not_< *is_convertible*< _Up &&, _Tp > >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = false> constexpr *std::experimental::optional*< _Tp >::*optional (optional*< _Up > && __t)= [inline]=, = [explicit]=, = [constexpr]= Definition at line *522 of file experimental/optional.

is_constructible*< _Tp, _Args &&… >::value > *std::experimental::optional*< _Tp >::emplace (_Args &&… __args)= [inline]= Definition at line *607 of file experimental/optional.

enable_if_t*< *is_constructible*< _Tp, *initializer_list*< _Up > &, _Args &&… >::value > *std::experimental::optional*< _Tp >::emplace (*initializer_list*< _Up > __il, _Args &&… __args)= [inline]= Definition at line *616 of file experimental/optional.

>::operator bool () const= [inline]=, = [explicit]=, = [constexpr]=, = [noexcept]= Definition at line 671 of file experimental/optional.

std::experimental::optional*< _Tp >::operator () &= [inline]=, = [constexpr]= Definition at line 660 of file experimental/optional.

std::experimental::optional*< _Tp >::operator () &&= [inline]=, = [constexpr]= Definition at line 664 of file experimental/optional.

std::experimental::optional*< _Tp >::operator () const &= [inline]=, = [constexpr]= Definition at line 656 of file experimental/optional.

std::experimental::optional*< _Tp >::operator () const &&= [inline]=, = [constexpr]= Definition at line 668 of file experimental/optional.

>::operator-> ()= [inline]= Definition at line 652 of file experimental/optional.

std::experimental::optional*< _Tp >::operator-> () const= [inline]=, = [constexpr]= Definition at line *648 of file experimental/optional.

__and_< __not_< is_same*< *optional*< _Tp >, *decay_t*< _Up > > >, *is_constructible*< _Tp, _Up >, __not_< __and_< *is_scalar*< _Tp >, *is_same*< _Tp, *decay_t*< _Up > > > >, *is_assignable*< _Tp &, _Up > >::value, *optional & > std::experimental::optional*< _Tp >::operator= (_Up && __u)= [inline]= Definition at line *544 of file experimental/optional.

__and_< __not_< is_same*< _Tp, _Up > >, *is_constructible*< _Tp, const _Up & >, *is_assignable*< _Tp &, _Up >, __not_< __converts_from_optional< _Tp, _Up > >, __not_< __assigns_from_optional< _Tp, _Up > > >::value, *optional & > std::experimental::optional*< _Tp >::operator= (const *optional*< _Up > & __u)= [inline]= Definition at line *563 of file experimental/optional.

_Tp >::operator= (nullopt_t)= [inline]=, = [noexcept]= Definition at line 530 of file experimental/optional.

__and_< __not_< is_same*< _Tp, _Up > >, *is_constructible*< _Tp, _Up >, *is_assignable*< _Tp &, _Up >, __not_< __converts_from_optional< _Tp, _Up > >, __not_< __assigns_from_optional< _Tp, _Up > > >::value, *optional & > std::experimental::optional*< _Tp >::operator= (*optional*< _Up > && __u)= [inline]= Definition at line *588 of file experimental/optional.

>::swap (optional*< _Tp > & __other)= [inline]=, = [noexcept]= Definition at line *626 of file experimental/optional.

std::experimental::optional*< _Tp >::value () &= [inline]=, = [constexpr]= Definition at line *685 of file experimental/optional.

std::experimental::optional*< _Tp >::value () &&= [inline]=, = [constexpr]= Definition at line *695 of file experimental/optional.

std::experimental::optional*< _Tp >::value () const &= [inline]=, = [constexpr]= Definition at line *675 of file experimental/optional.

std::experimental::optional*< _Tp >::value () const &&= [inline]=, = [constexpr]= Definition at line *705 of file experimental/optional.

std::experimental::optional*< _Tp >::value_or (_Up && __u) &&= [inline]= Definition at line *729 of file experimental/optional.

std::experimental::optional*< _Tp >::value_or (_Up && __u) const &= [inline]=, = [constexpr]= Definition at line *716 of file experimental/optional.