less_equal (3C++std) - Tru64 UNIX
Standard C++ LibraryCopyright 1996, Rogue Wave Software, Inc.
NAME
less_equal - Binary function object that returns true if its first
argument is less than or equal to its second
SYNOPSIS
#include<functional>
template <class T>
struct less_equal : public binary_function<T, T, bool>;
DESCRIPTION
less_equal is a binary function object. Its operator() returns true if x
is less than or equal to y. You can pass a less_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. less_equal would be used in that algorithm in the following
manner:
vector<int> vec1;
sort(vec1.begin(), vec1.end(),less_equal<int>());
After this call to sort, vec1 will be sorted in ascending order.
INTERFACE
template <class T>
struct less_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;
};
WARNING
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
binary_function, function objects
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
privacy and legal statement