epoc32/include/stdapis/boost/mpl/aux_/advance_backward.hpp
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:33:34 +0100
branchSymbian3
changeset 4 837f303aceeb
parent 3 e1b950c65cb4
permissions -rw-r--r--
Current Symbian^3 public API header files (from PDK 3.0.h)
This is the epoc32/include tree with the "platform" subtrees removed, and
all but a selected few mbg and rsg files removed.
     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 // $Source: /cvsroot/boost/boost/boost/mpl/aux_/advance_backward.hpp,v $
    18 // $Date: 2004/09/02 15:40:43 $
    19 // $Revision: 1.9 $
    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 #elif BOOST_PP_ITERATION_DEPTH() == 1
    83 #define i_ BOOST_PP_FRAME_ITERATION(1)
    84 
    85 template<>
    86 struct advance_backward< BOOST_PP_FRAME_ITERATION(1) >
    87 {
    88     template< typename Iterator > struct apply
    89     {
    90         typedef Iterator iter0;
    91 
    92 #if i_ > 0
    93 #   define BOOST_PP_ITERATION_PARAMS_2 \
    94     (3,(1, BOOST_PP_FRAME_ITERATION(1), <boost/mpl/aux_/advance_backward.hpp>))
    95 #   include BOOST_PP_ITERATE()
    96 #endif
    97 
    98         typedef BOOST_PP_CAT(iter,BOOST_PP_FRAME_ITERATION(1)) type;
    99     };
   100 
   101 #if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
   102     /// ETI workaround
   103     template<> struct apply<int>
   104     {
   105         typedef int type;
   106     };
   107 #endif
   108 };
   109 
   110 #undef i_
   111 
   112 ///// iteration, depth == 2
   113 
   114 #elif BOOST_PP_ITERATION_DEPTH() == 2
   115 
   116 #   define AUX778076_ITER_0 BOOST_PP_CAT(iter,BOOST_PP_DEC(BOOST_PP_FRAME_ITERATION(2)))
   117 #   define AUX778076_ITER_1 BOOST_PP_CAT(iter,BOOST_PP_FRAME_ITERATION(2))
   118 
   119         typedef typename prior<AUX778076_ITER_0>::type AUX778076_ITER_1;
   120         
   121 #   undef AUX778076_ITER_1
   122 #   undef AUX778076_ITER_0
   123 
   124 #endif // BOOST_PP_IS_ITERATING