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

   1
   2 #ifndef BOOST_MPL_MULTISET_AUX_COUNT_IMPL_HPP_INCLUDED
   3 #define BOOST_MPL_MULTISET_AUX_COUNT_IMPL_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/count_fwd.hpp>
  19 #include <boost/mpl/int.hpp>
  20 #include <boost/mpl/aux_/type_wrapper.hpp>
  21 #include <boost/mpl/aux_/static_cast.hpp>
  22 #include <boost/mpl/aux_/config/static_constant.hpp>
  23 #include <boost/mpl/aux_/config/workaround.hpp>
  24 #include <boost/mpl/aux_/config/msvc.hpp>
  25
  26 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
  27 #   include <boost/mpl/if.hpp>
  28 #   include <boost/type_traits/is_reference.hpp>
  29 #endif
  30
  31 namespace boost { namespace mpl {
  32
  33 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
  34
  35 namespace aux {
  36 template< typename S, typename U >
  37 struct multiset_count_impl
  38     : int_< sizeof(S::key_count(BOOST_MPL_AUX_STATIC_CAST(U*,0))) - 1 >
  39 {
  40 };
  41
  42 template< typename S, typename U >
  43 struct multiset_count_ref_impl
  44 {
  45     typedef U (* u_)();
  46     typedef int_< sizeof(S::ref_key_count(BOOST_MPL_AUX_STATIC_CAST(u_,0))) - 1 > type_;
  47     BOOST_STATIC_CONSTANT(int, value = type_::value);
  48     typedef type_ type;
  49 };
  50 }
  51
  52 template<>
  53 struct count_impl< aux::multiset_tag >
  54 {
  55     template< typename Set, typename Key > struct apply
  56         : if_<
  57               is_reference<Key>
  58             , aux::multiset_count_ref_impl<Set,Key>
  59             , aux::multiset_count_impl<Set,Key>
  60             >::type
  61     {
  62     };
  63 };
  64
  65 #else
  66
  67 template<>
  68 struct count_impl< aux::multiset_tag >
  69 {
  70     template< typename Set, typename Key > struct apply
  71     {
  72         enum { msvc71_wknd_ = sizeof(Set::key_count(BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*,0))) - 1 };
  73         typedef int_< msvc71_wknd_ > type;
  74         BOOST_STATIC_CONSTANT(int, value = msvc71_wknd_);
  75     };
  76 };
  77
  78 #endif // BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
  79
  80 }}
  81
  82 #endif // BOOST_MPL_MULTISET_AUX_COUNT_IMPL_HPP_INCLUDED