Click here to Skip to main content
15,884,472 members
Articles / Programming Languages / C

The Windows Access Control Model: Part 2

Rate me:
Please Sign up or sign in to vote.
4.80/5 (28 votes)
27 Jun 2005CPOL43 min read 244.5K   7.2K   113  
This second part of the Access Control series will program with the basic Access Control structures.
// preprocessed version of 'boost/mpl/list.hpp' header
// see the original for copyright information

namespace boost {
namespace mpl {

namespace aux {
template< int N > struct list_impl_chooser;
}

namespace aux {

template<>
struct list_impl_chooser<0>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list0<
              
            > type;
    };
};

} // namespace aux

namespace aux {

template<>
struct list_impl_chooser<1>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list1<
               T0
            > type;
    };
};

} // namespace aux

namespace aux {

template<>
struct list_impl_chooser<2>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list2<
               T0, T1
            > type;
    };
};

} // namespace aux

namespace aux {

template<>
struct list_impl_chooser<3>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list3<
               T0, T1, T2
            > type;
    };
};

} // namespace aux

namespace aux {

template<>
struct list_impl_chooser<4>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list4<
               T0, T1, T2, T3
            > type;
    };
};

} // namespace aux

namespace aux {

template<>
struct list_impl_chooser<5>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list5<
               T0, T1, T2, T3, T4
            > type;
    };
};

} // namespace aux

namespace aux {

template<>
struct list_impl_chooser<6>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list6<
               T0, T1, T2, T3, T4, T5
            > type;
    };
};

} // namespace aux

namespace aux {

template<>
struct list_impl_chooser<7>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list7<
               T0, T1, T2, T3, T4, T5, T6
            > type;
    };
};

} // namespace aux

namespace aux {

template<>
struct list_impl_chooser<8>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list8<
               T0, T1, T2, T3, T4, T5, T6, T7
            > type;
    };
};

} // namespace aux

namespace aux {

template<>
struct list_impl_chooser<9>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list9<
               T0, T1, T2, T3, T4, T5, T6, T7, T8
            > type;
    };
};

} // namespace aux

namespace aux {

template<>
struct list_impl_chooser<10>
{
    template<
          typename T0, typename T1, typename T2, typename T3, typename T4
        , typename T5, typename T6, typename T7, typename T8, typename T9
        >
    struct result_
    {
        typedef list10<
               T0, T1, T2, T3, T4, T5, T6, T7, T8, T9
            > type;
    };
};

} // namespace aux

namespace aux {

template< typename T >
struct is_list_arg
{
    enum { value = true };
};

template<>
struct is_list_arg<void_>
{
    enum { value = false };
};

template<
      typename T1, typename T2, typename T3, typename T4, typename T5
    , typename T6, typename T7, typename T8, typename T9, typename T10
    >
struct list_count_args
{
    enum { value =
          is_list_arg<T1>::value + is_list_arg<T2>::value 
        + is_list_arg<T3>::value + is_list_arg<T4>::value 
        + is_list_arg<T5>::value + is_list_arg<T6>::value 
        + is_list_arg<T7>::value + is_list_arg<T8>::value 
        + is_list_arg<T9>::value + is_list_arg<T10>::value
        };
};

template<
      typename T0, typename T1, typename T2, typename T3, typename T4
    , typename T5, typename T6, typename T7, typename T8, typename T9
    >
struct list_impl
{
    typedef aux::list_count_args< T0,T1,T2,T3,T4,T5,T6,T7,T8,T9 > arg_num_;
    typedef typename aux::list_impl_chooser< 
          arg_num_::value
        >::template result_< T0,T1,T2,T3,T4,T5,T6,T7,T8,T9 >::type type;
};

} // namespace aux

template<
      typename T0 = void_, typename T1 = void_, typename T2 = void_
    , typename T3 = void_, typename T4 = void_, typename T5 = void_
    , typename T6 = void_, typename T7 = void_, typename T8 = void_
    , typename T9 = void_
    >
struct list
    : aux::list_impl< T0,T1,T2,T3,T4,T5,T6,T7,T8,T9 >::type
{
    typedef typename aux::list_impl<
           T0, T1, T2, T3, T4, T5, T6, T7, T8, T9
        >::type type;
};

} // namespace mpl
} // namespace boost

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Web Developer
United States United States
Mr. Shah is a reclusive C++/C# developer lurking somewhere in the depths of the city of London. He learnt physics at Kings' College London and obtained a Master in Science there. Having earned an MCAD, he teeters on the brink of transitioning from C++ to C#, unsure of which language to jump to. Fortunately, he also knows how to use .NET interop to merge code between the two languages (which means he won't have to make the choice anytime soon).

His interests (apart from programming) are walking, football (the real one!), philosophy, history, retro-gaming, strategy gaming, and any good game in general.

He maintains a website / blog / FAQ / junk at shexec32.serveftp.net, where he places the best answers he's written to the questions you've asked. If you can find him, maybe you can hire Mr. Shah to help you with anything C++[/CLI]/C#/.NET related Smile | :) .

Comments and Discussions