Standard C++ Library Class Reference
typedef typename unary_function<Arg,Result>::result_type
result_type;
explicit pointer_to_unary_function (Result (*f)(Arg));
Result operator() (const Arg&) const;
};
template<class Arg, class Result>
pointer_to_unary_function<Arg, Result>
ptr_fun (Result (*f)(Arg));
See Also
Function Objects, pointer_to_binary_function, ptr_fun, unary_function