boost/mpl/filter_view.hpp

   1
   2 #ifndef BOOST_MPL_FILTER_VIEW_HPP_INCLUDED
   3 #define BOOST_MPL_FILTER_VIEW_HPP_INCLUDED
   4
   5 // Copyright Aleksey Gurtovoy 2000-2004
   6 //
   7 // Distributed under the Boost Software License, Version 1.0.
   8 // (See accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10 //
  11 // See http://www.boost.org/libs/mpl for documentation.
  12
  13 // $Id$
  14 // $Date$
  15 // $Revision$
  16
  17 #include <boost/mpl/begin_end.hpp>
  18 #include <boost/mpl/lambda.hpp>
  19 #include <boost/mpl/aux_/filter_iter.hpp>
  20 #include <boost/mpl/aux_/na_spec.hpp>
  21
  22 namespace boost { namespace mpl {
  23
  24 template<
  25       typename BOOST_MPL_AUX_NA_PARAM(Sequence)
  26     , typename BOOST_MPL_AUX_NA_PARAM(Predicate)
  27     >
  28 struct filter_view
  29 {
  30  private:
  31     typedef typename lambda<Predicate>::type pred_;
  32     typedef typename begin<Sequence>::type first_;
  33     typedef typename end<Sequence>::type last_;
  34
  35  public:
  36     struct tag;
  37     typedef filter_view type;
  38     typedef typename aux::next_filter_iter< first_,last_,pred_ >::type begin;
  39     typedef aux::filter_iter< last_,last_,pred_ > end;
  40 };
  41
  42 BOOST_MPL_AUX_NA_SPEC(2, filter_view)
  43
  44 }}
  45
  46 #endif // BOOST_MPL_FILTER_VIEW_HPP_INCLUDED