.TH "std::identity" 3cxx "Sun Jan 8 2023" "libstdc++" \" -*- nroff -*- .ad l .nh .SH NAME std::identity \- [func\&.identity] The identity function\&. .SH SYNOPSIS .br .PP .PP \fC#include \fP .SS "Public Types" .in +1c .ti -1c .RI "using \fBis_transparent\fP = __is_transparent" .br .in -1c .SS "Public Member Functions" .in +1c .ti -1c .RI "template constexpr _Tp && \fBoperator()\fP (_Tp &&__t) const noexcept" .br .in -1c .SH "Detailed Description" .PP [func\&.identity] The identity function\&. .PP Definition at line \fB47\fP of file \fBfunctional\fP\&. .SH "Member Typedef Documentation" .PP .SS "using std::identity::is_transparent = __is_transparent" .PP Definition at line \fB55\fP of file \fBfunctional\fP\&. .SH "Member Function Documentation" .PP .SS "template constexpr _Tp && std::identity::operator() (_Tp && __t) const\fC [inline]\fP, \fC [constexpr]\fP, \fC [noexcept]\fP" .PP Definition at line \fB52\fP of file \fBfunctional\fP\&. .SH "Author" .PP Generated automatically by Doxygen for libstdc++ from the source code\&.