/* Copyright 2003-2008 Joaquin M Lopez Munoz. | |
* Distributed under the Boost Software License, Version 1.0. | |
* (See accompanying file LICENSE_1_0.txt or copy at | |
* http://www.boost.org/LICENSE_1_0.txt) | |
* | |
* See http://www.boost.org/libs/multi_index for library home page. | |
*/ | |
#ifndef BOOST_MULTI_INDEX_DETAIL_VALUE_COMPARE_HPP | |
#define BOOST_MULTI_INDEX_DETAIL_VALUE_COMPARE_HPP | |
#if defined(_MSC_VER)&&(_MSC_VER>=1200) | |
#pragma once | |
#endif | |
#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ | |
#include <boost/call_traits.hpp> | |
#include <functional> | |
namespace boost{ | |
namespace multi_index{ | |
namespace detail{ | |
template<typename Value,typename KeyFromValue,typename Compare> | |
struct value_comparison:std::binary_function<Value,Value,bool> | |
{ | |
value_comparison( | |
const KeyFromValue& key_=KeyFromValue(),const Compare& comp_=Compare()): | |
key(key_),comp(comp_) | |
{ | |
} | |
bool operator()( | |
typename call_traits<Value>::param_type x, | |
typename call_traits<Value>::param_type y)const | |
{ | |
return comp(key(x),key(y)); | |
} | |
private: | |
KeyFromValue key; | |
Compare comp; | |
}; | |
} /* namespace multi_index::detail */ | |
} /* namespace multi_index */ | |
} /* namespace boost */ | |
#endif |