/* 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