.TH "std::experimental::optional< _Tp >" 3 "libstdc++" \" -*- nroff -*-
.ad l
.nh
.SH NAME
std::experimental::optional< _Tp > \- Class template for optional values\&.  

.SH SYNOPSIS
.br
.PP
.PP
\fR#include <optional>\fP
.SS "Public Types"

.in +1c
.ti -1c
.RI "using \fBvalue_type\fP"
.br
.in -1c
.SS "Public Member Functions"

.in +1c
.ti -1c
.RI "template<typename _Up = _Tp, \fBenable_if_t\fP< __and_< __not_< is_same< optional< _Tp >, \fBdecay_t\fP< _Up > > >, \fBis_constructible\fP< _Tp, _Up && >, __not_< is_convertible< _Up &&, _Tp > > >::value, bool > = false> constexpr \fBoptional\fP (_Up &&__t)"
.br
.ti -1c
.RI "template<typename _Up = _Tp, \fBenable_if_t\fP< __and_< __not_< is_same< optional< _Tp >, \fBdecay_t\fP< _Up > > >, \fBis_constructible\fP< _Tp, _Up && >, is_convertible< _Up &&, _Tp > >::value, bool > = true> constexpr \fBoptional\fP (_Up &&__t)"
.br
.ti -1c
.RI "template<typename _Up, \fBenable_if_t\fP< __and_< __not_< is_same< _Tp, _Up > >, \fBis_constructible\fP< _Tp, const _Up & >, __not_< is_convertible< const _Up &, _Tp > >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = false> constexpr \fBoptional\fP (const optional< _Up > &__t)"
.br
.ti -1c
.RI "template<typename _Up, \fBenable_if_t\fP< __and_< __not_< is_same< _Tp, _Up > >, \fBis_constructible\fP< _Tp, const _Up & >, is_convertible< const _Up &, _Tp >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = true> constexpr \fBoptional\fP (const optional< _Up > &__t)"
.br
.ti -1c
.RI "template<typename _Up, \fBenable_if_t\fP< __and_< __not_< is_same< _Tp, _Up > >, \fBis_constructible\fP< _Tp, _Up && >, __not_< is_convertible< _Up &&, _Tp > >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = false> constexpr \fBoptional\fP (optional< _Up > &&__t)"
.br
.ti -1c
.RI "template<typename _Up, \fBenable_if_t\fP< __and_< __not_< is_same< _Tp, _Up > >, \fBis_constructible\fP< _Tp, _Up && >, is_convertible< _Up &&, _Tp >, __not_< __converts_from_optional< _Tp, _Up > > >::value, bool > = true> constexpr \fBoptional\fP (optional< _Up > &&__t)"
.br
.ti -1c
.RI "template<typename\&.\&.\&. _Args> \fBenable_if_t\fP< \fBis_constructible\fP< _Tp, _Args &&\&.\&.\&. >::value > \fBemplace\fP (_Args &&\&.\&.\&. __args)"
.br
.ti -1c
.RI "template<typename _Up, typename\&.\&.\&. _Args> \fBenable_if_t\fP< \fBis_constructible\fP< _Tp, \fBinitializer_list\fP< _Up > &, _Args &&\&.\&.\&. >::value > \fBemplace\fP (\fBinitializer_list\fP< _Up > __il, _Args &&\&.\&.\&. __args)"
.br
.ti -1c
.RI "constexpr \fBoperator bool\fP () const noexcept"
.br
.ti -1c
.RI "constexpr _Tp & \fBoperator*\fP () &"
.br
.ti -1c
.RI "constexpr _Tp && \fBoperator*\fP () &&"
.br
.ti -1c
.RI "constexpr const _Tp & \fBoperator*\fP () const &"
.br
.ti -1c
.RI "constexpr const _Tp && \fBoperator*\fP () const &&"
.br
.ti -1c
.RI "_Tp * \fBoperator\->\fP ()"
.br
.ti -1c
.RI "constexpr const _Tp * \fBoperator\->\fP () const"
.br
.ti -1c
.RI "template<typename _Up = _Tp> \fBenable_if_t\fP< __and_< __not_< is_same< optional< _Tp >, \fBdecay_t\fP< _Up > > >, \fBis_constructible\fP< _Tp, _Up >, __not_< __and_< \fBis_scalar\fP< _Tp >, is_same< _Tp, \fBdecay_t\fP< _Up > > > >, \fBis_assignable\fP< _Tp &, _Up > >::value, optional & > \fBoperator=\fP (_Up &&__u)"
.br
.ti -1c
.RI "template<typename _Up> \fBenable_if_t\fP< __and_< __not_< is_same< _Tp, _Up > >, \fBis_constructible\fP< _Tp, const _Up & >, \fBis_assignable\fP< _Tp &, _Up >, __not_< __converts_from_optional< _Tp, _Up > >, __not_< __assigns_from_optional< _Tp, _Up > > >::value, optional & > \fBoperator=\fP (const optional< _Up > &__u)"
.br
.ti -1c
.RI "optional & \fBoperator=\fP (\fBnullopt_t\fP) noexcept"
.br
.ti -1c
.RI "template<typename _Up> \fBenable_if_t\fP< __and_< __not_< is_same< _Tp, _Up > >, \fBis_constructible\fP< _Tp, _Up >, \fBis_assignable\fP< _Tp &, _Up >, __not_< __converts_from_optional< _Tp, _Up > >, __not_< __assigns_from_optional< _Tp, _Up > > >::value, optional & > \fBoperator=\fP (optional< _Up > &&__u)"
.br
.ti -1c
.RI "void \fBswap\fP (optional &__other) noexcept(\fBis_nothrow_move_constructible\fP< _Tp >() &&__is_nothrow_swappable< _Tp >::value)"
.br
.ti -1c
.RI "constexpr _Tp & \fBvalue\fP () &"
.br
.ti -1c
.RI "constexpr _Tp && \fBvalue\fP () &&"
.br
.ti -1c
.RI "constexpr const _Tp & \fBvalue\fP () const &"
.br
.ti -1c
.RI "constexpr const _Tp && \fBvalue\fP () const &&"
.br
.ti -1c
.RI "template<typename _Up> _Tp \fBvalue_or\fP (_Up &&__u) &&"
.br
.ti -1c
.RI "template<typename _Up> constexpr _Tp \fBvalue_or\fP (_Up &&__u) const &"
.br
.in -1c
.SH "Detailed Description"
.PP 

.SS "template<typename _Tp>
.br
class std::experimental::optional< _Tp >"Class template for optional values\&. 

.SH "Author"
.PP 
Generated automatically by Doxygen for libstdc++ from the source code\&.