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CXXLSTD, Function Objects, less

 *Conan The Librarian

 			   Standard C++	Library
 		 Copyright 1996, Rogue Wave Software, Inc.

 NAME

   less	- Binary function object that returns true if its first
   argument  is less than its	second

 SYNOPSIS

   #include<functional>

   template <class T>
   struct less :	public binary_function<T, T, bool> ;

 DESCRIPTION

   less is a binary function object.  Its operator() returns true if x
   is  less than y.  You can pass	a less 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 of the function.   less
   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(), less<int>());

   After	this call to transform,	vecResult(n) will contain a "1"	if
   vec1(n) was less than	 vec2(n) or a "0" if vec1(n) was greater than
   or equal to vec2(n).

 INTERFACE

   template <class T>
   struct less :	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
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