ceph/src/boost/libs/mpl/include/boost/mpl/multiset/aux_/item.hpp

   1
   2 #ifndef BOOST_MPL_MULTISET_AUX_ITEM_HPP_INCLUDED
   3 #define BOOST_MPL_MULTISET_AUX_ITEM_HPP_INCLUDED
   4
   5 // Copyright Aleksey Gurtovoy 2003-2004
   6 //
   7 // Distributed under the Boost Software License, Version 1.0.
   8 // (See accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10 //
  11 // See http://www.boost.org/libs/mpl for documentation.
  12
  13 // $Id$
  14 // $Date$
  15 // $Revision$
  16
  17 #include <boost/mpl/multiset/aux_/tag.hpp>
  18 #include <boost/mpl/int.hpp>
  19 #include <boost/mpl/aux_/type_wrapper.hpp>
  20 #include <boost/mpl/aux_/yes_no.hpp>
  21 #include <boost/mpl/aux_/value_wknd.hpp>
  22 #include <boost/mpl/aux_/static_cast.hpp>
  23 #include <boost/mpl/aux_/config/arrays.hpp>
  24 #include <boost/mpl/aux_/config/msvc.hpp>
  25 #include <boost/mpl/aux_/config/workaround.hpp>
  26
  27 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
  28 #   include <boost/mpl/eval_if.hpp>
  29 #   include <boost/mpl/next.hpp>
  30 #   include <boost/type_traits/is_same.hpp>
  31 #endif
  32
  33
  34 namespace boost { namespace mpl {
  35
  36 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
  37
  38 template< typename T, typename Base >
  39 struct ms_item
  40 {
  41     typedef aux::multiset_tag tag;
  42
  43     template< typename U > struct prior_count
  44     {
  45         enum { msvc70_wknd_ = sizeof(Base::key_count(BOOST_MPL_AUX_STATIC_CAST(U*,0))) };
  46         typedef int_< msvc70_wknd_ > count_;
  47         typedef typename eval_if< is_same<T,U>, next<count_>, count_ >::type c_;
  48 #if defined(BOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES)
  49         typedef typename aux::weighted_tag<BOOST_MPL_AUX_MSVC_VALUE_WKND(c_)::value>::type type;
  50 #else
  51         typedef char (&type)[BOOST_MPL_AUX_MSVC_VALUE_WKND(c_)::value];
  52 #endif
  53     };
  54
  55     template< typename U > struct prior_ref_count
  56     {
  57         typedef U (* u_)();
  58         enum { msvc70_wknd_ = sizeof(Base::ref_key_count(BOOST_MPL_AUX_STATIC_CAST(u_,0))) };
  59         typedef int_< msvc70_wknd_ > count_;
  60         typedef typename eval_if< is_same<T,U>, next<count_>, count_ >::type c_;
  61 #if defined(BOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES)
  62         typedef typename aux::weighted_tag<BOOST_MPL_AUX_MSVC_VALUE_WKND(c_)::value>::type type;
  63 #else
  64         typedef char (&type)[BOOST_MPL_AUX_MSVC_VALUE_WKND(c_)::value];
  65 #endif
  66     };
  67
  68     template< typename U >
  69     static typename prior_count<U>::type key_count(U*);
  70
  71     template< typename U >
  72     static typename prior_ref_count<U>::type ref_key_count(U (*)());
  73 };
  74
  75 #else // BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
  76
  77 namespace aux {
  78 template< typename U, typename Base >
  79 struct prior_key_count
  80 {
  81     enum { msvc71_wknd_ = sizeof(Base::key_count(BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<U>*,0))) };
  82     typedef int_< msvc71_wknd_ > count_;
  83 #if defined(BOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES)
  84     typedef typename aux::weighted_tag< BOOST_MPL_AUX_VALUE_WKND(count_)::value >::type type;
  85 #else
  86     typedef char (&type)[count_::value];
  87 #endif
  88 };
  89 }
  90
  91 template< typename T, typename Base >
  92 struct ms_item
  93 {
  94     typedef aux::multiset_tag tag;
  95
  96     enum { msvc71_wknd_ = sizeof(Base::key_count(BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<T>*,0))) + 1 };
  97     typedef int_< msvc71_wknd_ > count_;
  98 #if defined(BOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES)
  99     static
 100     typename aux::weighted_tag< BOOST_MPL_AUX_VALUE_WKND(count_)::value >::type
 101         key_count(aux::type_wrapper<T>*);
 102 #else
 103     static char (& key_count(aux::type_wrapper<T>*) )[count_::value];
 104 #endif
 105
 106     template< typename U >
 107     static typename aux::prior_key_count<U,Base>::type key_count(aux::type_wrapper<U>*);
 108 };
 109
 110 #endif // BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
 111
 112 }}
 113
 114 #endif // BOOST_MPL_MULTISET_AUX_ITEM_HPP_INCLUDED