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3rdparty/boost_1_81_0/boost/mpl/fold.hpp 1.15 KB
63e88f80   Hu Chunming   提交三方库
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  #ifndef BOOST_MPL_FOLD_HPP_INCLUDED
  #define BOOST_MPL_FOLD_HPP_INCLUDED
  
  // Copyright Aleksey Gurtovoy 2001-2004
  // Copyright David Abrahams 2001-2002
  //
  // 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)
  //
  // See http://www.boost.org/libs/mpl for documentation.
  
  // $Id$
  // $Date$
  // $Revision$
  
  #include <boost/mpl/begin_end.hpp>
  #include <boost/mpl/O1_size.hpp>
  #include <boost/mpl/aux_/fold_impl.hpp>
  #include <boost/mpl/aux_/na_spec.hpp>
  #include <boost/mpl/aux_/lambda_support.hpp>
  
  namespace boost { namespace mpl {
  
  template<
        typename BOOST_MPL_AUX_NA_PARAM(Sequence)
      , typename BOOST_MPL_AUX_NA_PARAM(State)
      , typename BOOST_MPL_AUX_NA_PARAM(ForwardOp)
      >
  struct fold
  {
      typedef typename aux::fold_impl<
            ::boost::mpl::O1_size<Sequence>::value
          , typename begin<Sequence>::type
          , typename end<Sequence>::type
          , State
          , ForwardOp
          >::state type;
  
      BOOST_MPL_AUX_LAMBDA_SUPPORT(3,fold,(Sequence,State,ForwardOp))
  };
  
  BOOST_MPL_AUX_NA_SPEC(3, fold)
  
  }}
  
  #endif // BOOST_MPL_FOLD_HPP_INCLUDED