.TH "std::nullopt_t" 3cxx "Wed Jul 28 2021" "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)" .br .in -1c .SH "Detailed Description" .PP Tag type to disengage optional objects\&. .PP Definition at line 63 of file optional\&. .SH "Author" .PP Generated automatically by Doxygen for libstdc++ from the source code\&.