Merge c:/dyninst/pc_bluegene/dyninst into dyn_pc_integration
[dyninst.git] / external / boost / mpl / aux_ / advance_backward.hpp
1
2 #if !defined(BOOST_PP_IS_ITERATING)
3
4 ///// header body
5
6 #ifndef BOOST_MPL_AUX778076_ADVANCE_BACKWARD_HPP_INCLUDED
7 #define BOOST_MPL_AUX778076_ADVANCE_BACKWARD_HPP_INCLUDED
8
9 // Copyright Aleksey Gurtovoy 2000-2004
10 //
11 // Distributed under the Boost Software License, Version 1.0. 
12 // (See accompanying file LICENSE_1_0.txt or copy at 
13 // http://www.boost.org/LICENSE_1_0.txt)
14 //
15 // See http://www.boost.org/libs/mpl for documentation.
16
17 // $Id: advance_backward.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
18 // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
19 // $Revision: 49267 $
20
21 #if !defined(BOOST_MPL_PREPROCESSING_MODE)
22 #   include <boost/mpl/prior.hpp>
23 #   include <boost/mpl/apply_wrap.hpp>
24 #endif
25
26 #include <boost/mpl/aux_/config/use_preprocessed.hpp>
27
28 #if    !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
29     && !defined(BOOST_MPL_PREPROCESSING_MODE)
30
31 #   define BOOST_MPL_PREPROCESSED_HEADER advance_backward.hpp
32 #   include <boost/mpl/aux_/include_preprocessed.hpp>
33
34 #else
35
36 #   include <boost/mpl/limits/unrolling.hpp>
37 #   include <boost/mpl/aux_/nttp_decl.hpp>
38 #   include <boost/mpl/aux_/config/eti.hpp>
39
40 #   include <boost/preprocessor/iterate.hpp>
41 #   include <boost/preprocessor/cat.hpp>
42 #   include <boost/preprocessor/inc.hpp>
43
44 namespace boost { namespace mpl { namespace aux {
45
46 // forward declaration
47 template< BOOST_MPL_AUX_NTTP_DECL(long, N) > struct advance_backward;
48
49 #   define BOOST_PP_ITERATION_PARAMS_1 \
50     (3,(0, BOOST_MPL_LIMIT_UNROLLING, <boost/mpl/aux_/advance_backward.hpp>))
51 #   include BOOST_PP_ITERATE()
52
53 // implementation for N that exceeds BOOST_MPL_LIMIT_UNROLLING
54 template< BOOST_MPL_AUX_NTTP_DECL(long, N) >
55 struct advance_backward
56 {
57     template< typename Iterator > struct apply
58     {
59         typedef typename apply_wrap1<
60               advance_backward<BOOST_MPL_LIMIT_UNROLLING>
61             , Iterator
62             >::type chunk_result_;
63
64         typedef typename apply_wrap1<
65               advance_backward<(
66                 (N - BOOST_MPL_LIMIT_UNROLLING) < 0
67                     ? 0
68                     : N - BOOST_MPL_LIMIT_UNROLLING
69                     )>
70             , chunk_result_
71             >::type type;
72     };
73 };
74
75 }}}
76
77 #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
78 #endif // BOOST_MPL_AUX778076_ADVANCE_BACKWARD_HPP_INCLUDED
79
80 ///// iteration, depth == 1
81
82 // For gcc 4.4 compatability, we must include the
83 // BOOST_PP_ITERATION_DEPTH test inside an #else clause.
84 #else // BOOST_PP_IS_ITERATING
85 #if BOOST_PP_ITERATION_DEPTH() == 1
86 #define i_ BOOST_PP_FRAME_ITERATION(1)
87
88 template<>
89 struct advance_backward< BOOST_PP_FRAME_ITERATION(1) >
90 {
91     template< typename Iterator > struct apply
92     {
93         typedef Iterator iter0;
94
95 #if i_ > 0
96 #   define BOOST_PP_ITERATION_PARAMS_2 \
97     (3,(1, BOOST_PP_FRAME_ITERATION(1), <boost/mpl/aux_/advance_backward.hpp>))
98 #   include BOOST_PP_ITERATE()
99 #endif
100
101         typedef BOOST_PP_CAT(iter,BOOST_PP_FRAME_ITERATION(1)) type;
102     };
103
104 #if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
105     /// ETI workaround
106     template<> struct apply<int>
107     {
108         typedef int type;
109     };
110 #endif
111 };
112
113 #undef i_
114
115 ///// iteration, depth == 2
116
117 #elif BOOST_PP_ITERATION_DEPTH() == 2
118
119 #   define AUX778076_ITER_0 BOOST_PP_CAT(iter,BOOST_PP_DEC(BOOST_PP_FRAME_ITERATION(2)))
120 #   define AUX778076_ITER_1 BOOST_PP_CAT(iter,BOOST_PP_FRAME_ITERATION(2))
121
122         typedef typename prior<AUX778076_ITER_0>::type AUX778076_ITER_1;
123         
124 #   undef AUX778076_ITER_1
125 #   undef AUX778076_ITER_0
126
127 #endif // BOOST_PP_ITERATION_DEPTH()
128 #endif // BOOST_PP_IS_ITERATING