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