equal_to (3C++std) - Tru64 UNIX
Standard C++ LibraryCopyright 1996, Rogue Wave Software, Inc.
NAME
equal_to - Binary function object that returns true if its first argument
equals its second
SYNOPSIS
#include <functional>
template <class T>
struct equal_to;
DESCRIPTION
equal_to is a binary function object. Its operator() returns true if x is
equal to y. You can pass an equal_to object to any algorithm that requires
a binary function. For example, the transform algorithm applies a binary
operation to corresponding values in two collections and stores the result.
equal_to would be used in that algorithm in the following manner:
vector<int> vec1;
vector<int> vec2;
vector<int> vecResult;
transform(vec1.begin(), vec1.end(),
vec2.begin(), vecResult.begin(),
equal_to<int>());
After this call to transform, vecResult(n) will contain a "1" if vec1(n)
was equal to vec2(n) or a "0" if vec1(n) was not equal to vec2(n).
INTERFACE
template <class T>
struct equal_to : binary_function<T, T, bool>
{
typedef typename binary_function<T, T, bool>::second_argument_type
second_argument_type;
typedef typename binary_function<T, T, bool>::first_argument_type
first_argument_type;
typedef typename binary_function<T, T, bool>::result_type
result_type;
SEE ALSO
bool operator() (const T&, const T&) const;
}; binary_function, function objects
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
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