boost/mpl/aux_/preprocessed/gcc/iter_fold_if_impl.hpp

   1
   2 // Copyright Aleksey Gurtovoy 2001-2004
   3 // Copyright David Abrahams 2001-2002
   4 //
   5 // Distributed under the Boost Software License, Version 1.0.
   6 // (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8 //
   9
  10 // Preprocessed version of "boost/mpl/aux_/iter_fold_if_impl.hpp" header
  11 // -- DO NOT modify by hand!
  12
  13 namespace boost { namespace mpl { namespace aux {
  14
  15 template< typename Iterator, typename State >
  16 struct iter_fold_if_null_step
  17 {
  18     typedef State state;
  19     typedef Iterator iterator;
  20 };
  21
  22 template< bool >
  23 struct iter_fold_if_step_impl
  24 {
  25     template<
  26           typename Iterator
  27         , typename State
  28         , typename StateOp
  29         , typename IteratorOp
  30         >
  31     struct result_
  32     {
  33         typedef typename apply2< StateOp,State,Iterator >::type state;
  34         typedef typename IteratorOp::type iterator;
  35     };
  36 };
  37
  38 template<>
  39 struct iter_fold_if_step_impl<false>
  40 {
  41     template<
  42           typename Iterator
  43         , typename State
  44         , typename StateOp
  45         , typename IteratorOp
  46         >
  47     struct result_
  48     {
  49         typedef State state;
  50         typedef Iterator iterator;
  51     };
  52 };
  53
  54 template<
  55       typename Iterator
  56     , typename State
  57     , typename ForwardOp
  58     , typename Predicate
  59     >
  60 struct iter_fold_if_forward_step
  61 {
  62     typedef typename apply2< Predicate,State,Iterator >::type not_last;
  63     typedef typename iter_fold_if_step_impl<
  64           BOOST_MPL_AUX_MSVC_VALUE_WKND(not_last)::value
  65         >::template result_< Iterator,State,ForwardOp, mpl::next<Iterator> > impl_;
  66
  67     typedef typename impl_::state state;
  68     typedef typename impl_::iterator iterator;
  69 };
  70
  71 template<
  72       typename Iterator
  73     , typename State
  74     , typename BackwardOp
  75     , typename Predicate
  76     >
  77 struct iter_fold_if_backward_step
  78 {
  79     typedef typename apply2< Predicate,State,Iterator >::type not_last;
  80     typedef typename iter_fold_if_step_impl<
  81           BOOST_MPL_AUX_MSVC_VALUE_WKND(not_last)::value
  82         >::template result_< Iterator,State,BackwardOp, identity<Iterator> > impl_;
  83
  84     typedef typename impl_::state state;
  85     typedef typename impl_::iterator iterator;
  86 };
  87
  88 template<
  89       typename Iterator
  90     , typename State
  91     , typename ForwardOp
  92     , typename ForwardPredicate
  93     , typename BackwardOp
  94     , typename BackwardPredicate
  95     >
  96 struct iter_fold_if_impl
  97 {
  98  private:
  99     typedef iter_fold_if_null_step< Iterator,State > forward_step0;
 100     typedef iter_fold_if_forward_step< typename forward_step0::iterator, typename forward_step0::state, ForwardOp, ForwardPredicate > forward_step1;
 101     typedef iter_fold_if_forward_step< typename forward_step1::iterator, typename forward_step1::state, ForwardOp, ForwardPredicate > forward_step2;
 102     typedef iter_fold_if_forward_step< typename forward_step2::iterator, typename forward_step2::state, ForwardOp, ForwardPredicate > forward_step3;
 103     typedef iter_fold_if_forward_step< typename forward_step3::iterator, typename forward_step3::state, ForwardOp, ForwardPredicate > forward_step4;
 104
 105
 106     typedef typename if_<
 107           typename forward_step4::not_last
 108         , iter_fold_if_impl<
 109               typename forward_step4::iterator
 110             , typename forward_step4::state
 111             , ForwardOp
 112             , ForwardPredicate
 113             , BackwardOp
 114             , BackwardPredicate
 115             >
 116         , iter_fold_if_null_step<
 117               typename forward_step4::iterator
 118             , typename forward_step4::state
 119             >
 120         >::type backward_step4;
 121
 122     typedef iter_fold_if_backward_step< typename forward_step3::iterator, typename backward_step4::state, BackwardOp, BackwardPredicate > backward_step3;
 123     typedef iter_fold_if_backward_step< typename forward_step2::iterator, typename backward_step3::state, BackwardOp, BackwardPredicate > backward_step2;
 124     typedef iter_fold_if_backward_step< typename forward_step1::iterator, typename backward_step2::state, BackwardOp, BackwardPredicate > backward_step1;
 125     typedef iter_fold_if_backward_step< typename forward_step0::iterator, typename backward_step1::state, BackwardOp, BackwardPredicate > backward_step0;
 126
 127
 128  public:
 129     typedef typename backward_step0::state state;
 130     typedef typename backward_step4::iterator iterator;
 131 };
 132
 133 }}}