// (C) Copyright John Maddock 2005. | |
// Use, modification and distribution are subject to 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) | |
#ifndef BOOST_TR1_UTILITY_HPP_INCLUDED | |
# define BOOST_TR1_UTILITY_HPP_INCLUDED | |
# include <boost/tr1/detail/config.hpp> | |
#ifdef BOOST_HAS_TR1_UTILITY | |
# if defined(BOOST_HAS_INCLUDE_NEXT) && !defined(BOOST_TR1_DISABLE_INCLUDE_NEXT) | |
# include_next BOOST_TR1_HEADER(utility) | |
# else | |
# include <boost/tr1/detail/config_all.hpp> | |
# include BOOST_TR1_STD_HEADER(BOOST_TR1_PATH(utility)) | |
# endif | |
#else | |
#if defined(BOOST_TR1_USE_OLD_TUPLE) | |
#include <boost/type_traits/integral_constant.hpp> | |
#include <boost/type_traits/add_const.hpp> | |
#include <boost/type_traits/add_reference.hpp> | |
#include <boost/mpl/if.hpp> | |
namespace std{ namespace tr1{ | |
template <class T> struct tuple_size; // forward declaration | |
template < int I, class T> struct tuple_element; // forward declaration | |
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION | |
template <class T1, class T2> | |
struct tuple_size< ::std::pair<T1, T2> > | |
: public ::boost::integral_constant< ::std::size_t, 2> | |
{ | |
}; | |
template <class T1, class T2> | |
struct tuple_element<0, ::std::pair<T1, T2> > | |
{ | |
typedef typename std::pair<T1, T2>::first_type type; | |
}; | |
template <class T1, class T2> | |
struct tuple_element<1, std::pair<T1, T2> > | |
{ | |
typedef typename std::pair<T1, T2>::second_type type; | |
}; | |
#endif | |
namespace tuple_detail{ | |
template <int I, class T1, class T2> | |
struct tuple_get_result | |
{ | |
typedef typename boost::mpl::if_c<I==0, T1, T2>::type t1; | |
typedef typename boost::add_reference<t1>::type type; | |
}; | |
template <int I, class T1, class T2> | |
struct const_tuple_get_result | |
{ | |
typedef typename boost::mpl::if_c<I==0, T1, T2>::type t1; | |
# if BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x582)) | |
// I have absolutely no idea why add_const is not working here for Borland! | |
// It passes all other free-standing tests, some strange interaction going on | |
typedef typename boost::add_reference< const t1 >::type type; | |
# else | |
typedef typename boost::add_const<t1>::type t2; | |
typedef typename boost::add_reference<t2>::type type; | |
# endif | |
}; | |
template<int I, class T1, class T2> | |
inline typename tuple_detail::tuple_get_result<I,T1,T2>::type get(std::pair<T1, T2>& p, const ::boost::true_type&) | |
{ | |
return p.first; | |
} | |
template<int I, class T1, class T2> | |
inline typename tuple_detail::const_tuple_get_result<I,T1,T2>::type get(const std::pair<T1, T2>& p, const ::boost::true_type&) | |
{ | |
return p.first; | |
} | |
template<int I, class T1, class T2> | |
inline typename tuple_detail::tuple_get_result<I,T1,T2>::type get(std::pair<T1, T2>& p, const ::boost::false_type&) | |
{ | |
return p.second; | |
} | |
template<int I, class T1, class T2> | |
inline typename tuple_detail::const_tuple_get_result<I,T1,T2>::type get(const std::pair<T1, T2>& p, const ::boost::false_type&) | |
{ | |
return p.second; | |
} | |
} | |
template<int I, class T1, class T2> | |
inline typename tuple_detail::tuple_get_result<I,T1,T2>::type get(std::pair<T1, T2>& p) | |
{ | |
return tuple_detail::get<I>(p, boost::integral_constant<bool, I==0>()); | |
} | |
template<int I, class T1, class T2> | |
inline typename tuple_detail::const_tuple_get_result<I,T1,T2>::type get(const std::pair<T1, T2>& p) | |
{ | |
return tuple_detail::get<I>(p, boost::integral_constant<bool, I==0>()); | |
} | |
} } // namespaces | |
#else | |
#include <boost/tr1/tuple.hpp> | |
#endif | |
#endif | |
#endif |