.TH "std::relation" 3cxx "libstdc++" \" -*- nroff -*- .ad l .nh .SH NAME std::relation \- [concept\&.relation], concept relation .SH SYNOPSIS .br .PP .PP \fC#include \fP .SH "Concept definition" .PP .PP .nf template concept std::relation = predicate<_Rel, _Tp, _Tp> && predicate<_Rel, _Up, _Up> && predicate<_Rel, _Tp, _Up> && predicate<_Rel, _Up, _Tp> .fi .SH "Detailed Description" .PP [concept\&.relation], concept relation .SH "Author" .PP Generated automatically by Doxygen for libstdc++ from the source code\&.