Standard C++ Library Class Reference

Click on the banner to return to the Class Reference home page.

negate

Function Object

Summary

Unary function object that returns the negation of its argument.

Contents

Synopsis●

Description●

Interface●

Warning●

See Also●

Synopsis

#include <functional>

template <class T>

struct negate : public unary_function<T, T>;

Description

negate is a unary function object. Its operator() returns the negation of its argument, i.e., true if its argument is false,

or false if its arguement is true. You can pass a negate object to any algorithm that requires a unary function. For

example, the transform algorithm applies a unary operation to the values in a collection and stores the result. negate

could be used in that algorithm in the following manner:

vector<int> vec1;

vector<int> vecResult;

transform(vec1.begin(), vec1.end(), vecResult.begin(), negate<int>());

After this call to transform, vecResult(n) will contain the negation of the element in vec1(n).

Interface

template <class T>

struct negate : unary_function<T, T> {