113   template <class _Arg1, class _Arg2, class _Result>
116       typedef _Arg1 first_argument_type;   ///< the type of the first argument
504   template <class _Arg1, class _Arg2, class _Result>
506     : public binary_function<_Arg1, _Arg2, _Result>
509       _Result (*_M_ptr)(_Arg1, _Arg2);
514       pointer_to_binary_function(_Result (*__x)(_Arg1, _Arg2))  in pointer_to_binary_function()  argument
518       operator()(_Arg1 __x, _Arg2 __y) const  in operator()
523   template <class _Arg1, class _Arg2, class _Result>
524     inline pointer_to_binary_function<_Arg1, _Arg2, _Result>
525     ptr_fun(_Result (*__x)(_Arg1, _Arg2))  in ptr_fun()  argument
526     { return pointer_to_binary_function<_Arg1, _Arg2, _Result>(__x); }  in ptr_fun()