boost/mpl/reverse_fold.hpp

   1
   2 #ifndef BOOST_MPL_REVERSE_FOLD_HPP_INCLUDED
   3 #define BOOST_MPL_REVERSE_FOLD_HPP_INCLUDED
   4
   5 // Copyright Aleksey Gurtovoy 2001-2004
   6 // Copyright David Abrahams 2001-2002
   7 //
   8 // Distributed under the Boost Software License, Version 1.0.
   9 // (See accompanying file LICENSE_1_0.txt or copy at
  10 // http://www.boost.org/LICENSE_1_0.txt)
  11 //
  12 // See http://www.boost.org/libs/mpl for documentation.
  13
  14 // $Id: reverse_fold.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
  15 // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
  16 // $Revision: 49267 $
  17
  18 #include <boost/mpl/begin_end.hpp>
  19 #include <boost/mpl/O1_size.hpp>
  20 #include <boost/mpl/arg.hpp>
  21 #include <boost/mpl/aux_/reverse_fold_impl.hpp>
  22 #include <boost/mpl/aux_/na_spec.hpp>
  23
  24 namespace boost { namespace mpl {
  25
  26 template<
  27       typename BOOST_MPL_AUX_NA_PARAM(Sequence)
  28     , typename BOOST_MPL_AUX_NA_PARAM(State)
  29     , typename BOOST_MPL_AUX_NA_PARAM(BackwardOp)
  30     , typename ForwardOp = arg<1>
  31     >
  32 struct reverse_fold
  33 {
  34     typedef typename aux::reverse_fold_impl<
  35           ::boost::mpl::O1_size<Sequence>::value
  36         , typename begin<Sequence>::type
  37         , typename end<Sequence>::type
  38         , State
  39         , BackwardOp
  40         , ForwardOp
  41         >::state type;
  42
  43     BOOST_MPL_AUX_LAMBDA_SUPPORT(3,reverse_fold,(Sequence,State,BackwardOp))
  44 };
  45
  46 BOOST_MPL_AUX_NA_SPEC(3, reverse_fold)
  47
  48 }}
  49
  50 #endif // BOOST_MPL_REVERSE_FOLD_HPP_INCLUDED