advance_backward.hpp 2.76 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132

// Copyright Aleksey Gurtovoy 2000-2004
//
// Distributed under the Boost Software License, Version 1.0. 
// (See accompanying file LICENSE_1_0.txt or copy at 
// http://www.boost.org/LICENSE_1_0.txt)
//

// Preprocessed version of "boost/mpl/aux_/advance_backward.hpp" header
// -- DO NOT modify by hand!

namespace boost { namespace mpl { namespace aux {

template< long N > struct advance_backward;
template<>
struct advance_backward<0>
{
    template< typename Iterator > struct apply
    {
        typedef Iterator iter0;
        typedef iter0 type;
    };

    /// ETI workaround
    template<> struct apply<int>
    {
        typedef int type;
    };

};

template<>
struct advance_backward<1>
{
    template< typename Iterator > struct apply
    {
        typedef Iterator iter0;
        typedef typename prior<iter0>::type iter1;
        typedef iter1 type;
    };

    /// ETI workaround
    template<> struct apply<int>
    {
        typedef int type;
    };

};

template<>
struct advance_backward<2>
{
    template< typename Iterator > struct apply
    {
        typedef Iterator iter0;
        typedef typename prior<iter0>::type iter1;
        typedef typename prior<iter1>::type iter2;
        typedef iter2 type;
    };

    /// ETI workaround
    template<> struct apply<int>
    {
        typedef int type;
    };

};

template<>
struct advance_backward<3>
{
    template< typename Iterator > struct apply
    {
        typedef Iterator iter0;
        typedef typename prior<iter0>::type iter1;
        typedef typename prior<iter1>::type iter2;
        typedef typename prior<iter2>::type iter3;
        typedef iter3 type;
    };

    /// ETI workaround
    template<> struct apply<int>
    {
        typedef int type;
    };

};

template<>
struct advance_backward<4>
{
    template< typename Iterator > struct apply
    {
        typedef Iterator iter0;
        typedef typename prior<iter0>::type iter1;
        typedef typename prior<iter1>::type iter2;
        typedef typename prior<iter2>::type iter3;
        typedef typename prior<iter3>::type iter4;
        typedef iter4 type;
    };

    /// ETI workaround
    template<> struct apply<int>
    {
        typedef int type;
    };

};

template< long N >
struct advance_backward
{
    template< typename Iterator > struct apply
    {
        typedef typename apply_wrap1<
              advance_backward<4>
            , Iterator
            >::type chunk_result_;

        typedef typename apply_wrap1<
              advance_backward<(
                (N - 4) < 0
                    ? 0
                    : N - 4
                    )>
            , chunk_result_
            >::type type;
    };
};

}}}