Symaptic: os/ossrv/ossrv_pub/boost_apis/boost/tr1/utility.hpp@bde4ae8d615e

     1 //  (C) Copyright John Maddock 2005.

     2 //  Use, modification and distribution are subject to the

     3 //  Boost Software License, Version 1.0. (See accompanying file

     4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

     6 #ifndef BOOST_TR1_UTILITY_HPP_INCLUDED

     7 #  define BOOST_TR1_UTILITY_HPP_INCLUDED

     8 #  include <boost/tr1/detail/config.hpp>

    10 #ifdef BOOST_HAS_TR1_UTILITY

    12 #  ifdef BOOST_HAS_INCLUDE_NEXT

    13 #     include_next BOOST_TR1_HEADER(utility)

    14 #  else

    15 #     include BOOST_TR1_STD_HEADER(BOOST_TR1_PATH(utility))

    16 #  endif

    18 #else

    20 #if defined(BOOST_TR1_USE_OLD_TUPLE)

    22 #include <boost/type_traits/integral_constant.hpp>

    23 #include <boost/type_traits/add_const.hpp>

    24 #include <boost/type_traits/add_reference.hpp>

    25 #include <boost/mpl/if.hpp>

    28 namespace std{ namespace tr1{

    30 template <class T> struct tuple_size; // forward declaration

    31 template < int I, class T> struct tuple_element; // forward declaration

    33 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

    34 template <class T1, class T2>

    35 struct tuple_size< ::std::pair<T1, T2> >

    36    : public ::boost::integral_constant< ::std::size_t, 2>

    37 {

    38 };

    40 template <class T1, class T2>

    41 struct tuple_element<0, ::std::pair<T1, T2> >

    42 {

    43    typedef typename std::pair<T1, T2>::first_type type;

    44 };

    46 template <class T1, class T2>

    47 struct tuple_element<1, std::pair<T1, T2> >

    48 {

    49    typedef typename std::pair<T1, T2>::second_type type;

    50 };

    51 #endif

    53 namespace tuple_detail{

    54    template <int I, class T1, class T2>

    55    struct tuple_get_result

    56    {

    57       typedef typename boost::mpl::if_c<I==0, T1, T2>::type t1;

    58       typedef typename boost::add_reference<t1>::type type;

    59    };

    60    template <int I, class T1, class T2>

    61    struct const_tuple_get_result

    62    {

    63       typedef typename boost::mpl::if_c<I==0, T1, T2>::type t1;

    64 # if BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x582))

    65       // I have absolutely no idea why add_const is not working here for Borland!

    66       // It passes all other free-standing tests, some strange interaction going on

    67       typedef typename boost::add_reference< const t1 >::type type;

    68 # else

    69       typedef typename boost::add_const<t1>::type t2;

    70       typedef typename boost::add_reference<t2>::type type;

    71 # endif

    72    };

    74 template<int I, class T1, class T2>

    75 inline typename tuple_detail::tuple_get_result<I,T1,T2>::type get(std::pair<T1, T2>& p, const ::boost::true_type&)

    76 {

    77    return p.first;

    78 }

    80 template<int I, class T1, class T2>

    81 inline typename tuple_detail::const_tuple_get_result<I,T1,T2>::type get(const std::pair<T1, T2>& p, const ::boost::true_type&)

    82 {

    83    return p.first;

    84 }

    86 template<int I, class T1, class T2>

    87 inline typename tuple_detail::tuple_get_result<I,T1,T2>::type get(std::pair<T1, T2>& p, const ::boost::false_type&)

    88 {

    89    return p.second;

    90 }

    92 template<int I, class T1, class T2>

    93 inline typename tuple_detail::const_tuple_get_result<I,T1,T2>::type get(const std::pair<T1, T2>& p, const ::boost::false_type&)

    94 {

    95    return p.second;

    96 }

    98 }

   100 template<int I, class T1, class T2>

   101 inline typename tuple_detail::tuple_get_result<I,T1,T2>::type get(std::pair<T1, T2>& p)

   102 {

   103    return tuple_detail::get<I>(p, boost::integral_constant<bool, I==0>());

   104 }

   106 template<int I, class T1, class T2>

   107 inline typename tuple_detail::const_tuple_get_result<I,T1,T2>::type get(const std::pair<T1, T2>& p)

   108 {

   109    return tuple_detail::get<I>(p, boost::integral_constant<bool, I==0>());

   110 }

   112 } } // namespaces

   114 #else

   116 #include <boost/tr1/tuple.hpp>

   118 #endif

   120 #endif

   122 #endif

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--