.TH "std::nullopt_t" 3cxx "Thu Feb 16 2023" "libstdc++" \" -*- nroff -*- .ad l .nh .SH NAME std::nullopt_t \- Tag type to disengage optional objects\&. .SH SYNOPSIS .br .PP .SS "Public Types" .in +1c .ti -1c .RI "enum class \fB_Construct\fP { \fB_Token\fP }" .br .in -1c .SS "Public Member Functions" .in +1c .ti -1c .RI "constexpr \fBnullopt_t\fP (_Construct) noexcept" .br .in -1c .SH "Detailed Description" .PP Tag type to disengage optional objects\&. .PP Definition at line \fB68\fP of file \fBoptional\fP\&. .SH "Member Enumeration Documentation" .PP .SS "enum class std::nullopt_t::_Construct\fC [strong]\fP" .PP Definition at line \fB75\fP of file \fBoptional\fP\&. .SH "Constructor & Destructor Documentation" .PP .SS "constexpr std::nullopt_t::nullopt_t (_Construct)\fC [inline]\fP, \fC [explicit]\fP, \fC [constexpr]\fP, \fC [noexcept]\fP" .PP Definition at line \fB78\fP of file \fBoptional\fP\&. .SH "Author" .PP Generated automatically by Doxygen for libstdc++ from the source code\&.