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VMS Help CXXLSTD, Algorithms, greater_equal *Conan The Librarian |
Standard C++ Library
Copyright 1996, Rogue Wave Software, Inc.
NAME
greater_equal - Binary function object that returns true if its
first argument is greater than or equal to its second
SYNOPSIS
#include <functional>
template <class T>
struct greater_equal ; : 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;
bool operator() (const T&, const T&) const;
};
DESCRIPTION
greater_equal is a binary function object. Its operator() returns
true if x is greater than or equal to y. You can pass a
greater_equal object to any algorithm that requires a binary
function. For example, the sort algorithm can accept a
binary function as an alternate comparison object to sort a
sequence. greater_equal would be used in that algorithm in
the following manner:
vector<int> vec1;
sort(vec1.begin(), vec1.end(),greater_equal<int>());
After this call to sort, vec1 will be sorted in descending order.
WARNINGS
If your compiler does not support default template parameters, then
you need to always supply the Allocator template argument. For
instance, you'll have to write :
vector<int, allocator<int> >
instead of
vector<int>
SEE ALSO
function objects
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
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