std::is_union< _Tp >(3) Library Functions Manual std::is_union< _Tp >(3) NAME std::is_union< _Tp > - is_union SYNOPSIS #include Inherits __bool_constant< __is_union(_Tp)>. Detailed Description template struct std::is_union< _Tp >"is_union Author Generated automatically by Doxygen for libstdc++ from the source code. libstdc++ std::is_union< _Tp >(3)