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3rdparty/boost_1_81_0/boost/mpl/zip_view.hpp 1.51 KB
63e88f80   Hu Chunming   提交三方库
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  #ifndef BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
  #define BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
  
  // Copyright Aleksey Gurtovoy 2000-2010
  // Copyright David Abrahams 2000-2002
  //
  // 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/transform.hpp>
  #include <boost/mpl/begin_end.hpp>
  #include <boost/mpl/iterator_tags.hpp>
  #include <boost/mpl/next.hpp>
  #include <boost/mpl/lambda.hpp>
  #include <boost/mpl/deref.hpp>
  #include <boost/mpl/aux_/na_spec.hpp>
  
  namespace boost { namespace mpl {
  
  template< typename IteratorSeq >
  struct zip_iterator
  {
      typedef forward_iterator_tag category;
      typedef typename transform1<
            IteratorSeq
          , deref<_1>
          >::type type;
  
      typedef zip_iterator<
            typename transform1<
                  IteratorSeq
                , mpl::next<_1>
              >::type
          > next;
  };
  
  template<
        typename BOOST_MPL_AUX_NA_PARAM(Sequences)
      >
  struct zip_view
  {
   private:
      typedef typename transform1< Sequences, mpl::begin<_1> >::type first_ones_;
      typedef typename transform1< Sequences, mpl::end<_1> >::type last_ones_;
      
   public:
      typedef nested_begin_end_tag tag;
      typedef zip_view type;
      typedef zip_iterator<first_ones_> begin;
      typedef zip_iterator<last_ones_> end;
  };
  
  BOOST_MPL_AUX_NA_SPEC(1, zip_view)
  
  }}
  
  #endif // BOOST_MPL_ZIP_VIEW_HPP_INCLUDED