container/detail/pair_key_mapped_of_value.hpp

0001 //////////////////////////////////////////////////////////////////////////////
0002 //
0003 // (C) Copyright Ion Gaztanaga 2005-2013. Distributed under the Boost
0004 // Software License, Version 1.0. (See accompanying file
0005 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 //
0007 // See http://www.boost.org/libs/container for documentation.
0008 //
0009 //////////////////////////////////////////////////////////////////////////////
0010 #ifndef BOOST_CONTAINER_PAIR_KEY_MAPPED_OF_VALUE_HPP
0011 #define BOOST_CONTAINER_PAIR_KEY_MAPPED_OF_VALUE_HPP
0012
0013 #ifndef BOOST_CONFIG_HPP
0014 #  include <boost/config.hpp>
0015 #endif
0016
0017 #if defined(BOOST_HAS_PRAGMA_ONCE)
0018 #  pragma once
0019 #endif
0020
0021 #include <boost/container/detail/config_begin.hpp>
0022 #include <boost/container/detail/workaround.hpp>
0023
0024 namespace boost {
0025 namespace container {
0026
0027 template<class Key, class Mapped>
0028 struct pair_key_mapped_of_value
0029 {
0030    typedef Key    key_type;
0031    typedef Mapped mapped_type;
0032
0033    template<class Pair>
0034    const key_type & key_of_value(const Pair &p) const
0035    {  return p.first;  }
0036
0037    template<class Pair>
0038    const mapped_type & mapped_of_value(const Pair &p) const
0039    {  return p.second;  }
0040
0041    template<class Pair>
0042    key_type & key_of_value(Pair &p) const
0043    {  return const_cast<key_type&>(p.first);  }
0044
0045    template<class Pair>
0046    mapped_type & mapped_of_value(Pair &p) const
0047    {  return p.second;  }
0048
0049 };
0050
0051 }}
0052
0053 #include <boost/container/detail/config_end.hpp>
0054
0055 #endif   // BOOST_CONTAINER_PAIR_KEY_MAPPED_OF_VALUE_HPP