std::logical_not< _Tp >(3) Library Functions Manual NAME std::logical_not< _Tp > - One of the Boolean operations functors. SYNOPSIS #include Inherits std::unary_function< _Tp, bool >. Public Types typedef _Tp argument_type argument_type is the type of the argument typedef bool result_type result_type is the return type Public Member Functions constexpr bool operator() (const _Tp &__x) const Detailed Description template struct std::logical_not< _Tp >"One of the Boolean operations functors. Member Typedef Documentation typedef _Tp std::unary_function< _Tp , bool >::argument_type [inherited] argument_type is the type of the argument typedef bool std::unary_function< _Tp , bool >::result_type [inherited] result_type is the return type Author Generated automatically by Doxygen for libstdc++ from the source code. libstdc++ std::logical_not< _Tp >(3)