Standard C++ Library Class Reference

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binary_function

Function Object

Summary

Base class for creating binary function objects.

Contents

Synopsis●

Description●

See Also●

Synopsis

#include <functional>

template <class Arg1, class Arg2, class Result>

struct binary_function{

typedef Arg1 first_argument_type;

typedef Arg2 second_argument_type;

typedef Result result_type;

};

Description

Function objects are objects with an operator() defined. They are important for the effective use

of the standard library's generic algorithms, because the interface for each algorithmic template

can accept either an object with an operator() defined or a pointer to a function. The Standard

C++ Library provides both a standard set of function objects, and a pair of classes that you can

use as the base for creating your own function objects.

Function objects that take two arguments are called binary function objects. Binary function