| /* 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 |