std::unary_function< _Arg, _Result >

       Generated automatically by Doxygen for libstdc++ from the source code.

                                                    libstdc++         std::unary_function<_Arg,_Result>(3cxx)

template<typename_Arg,typename_Result>
       struct std::unary_function< _Arg, _Result >"Helper for defining adaptable unary function objects.

       Deprecated
           Deprecated in C++11, no longer in the standard since C++17.

template<typename_Arg,typename_Result>typedef_Argstd::unary_function<_Arg,_Result>::argument_type
       argument_type is the type of the argument

   template<typename_Arg,typename_Result>typedef_Resultstd::unary_function<_Arg,_Result>::result_type

       result_type is the return type

       std::unary_function< _Arg, _Result >

       #include <functional>

       Inherited by std::_Identity< _Value >, std::_Select1st< pair< const _Key, _Tp > >, and
       std::pointer_to_unary_function<_Arg,_Result>.

   PublicTypestypedef _Arg argument_type
           argument_type is the type of the argument
       typedef _Result result_type
           result_type is the return type