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/* 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
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