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
34namespace boost { namespace mpl {
35
36#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
37
38template< typename T, typename Base >
39struct 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
77namespace aux {
78template< typename U, typename Base >
79struct 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
91template< typename T, typename Base >
92struct 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
115

source code of boost/boost/mpl/multiset/aux_/item.hpp