ceph/src/boost/libs/mpl/include/boost/mpl/aux_/partition_op.hpp

   1
   2 #ifndef BOOST_MPL_AUX_PARTITION_OP_HPP_INCLUDED
   3 #define BOOST_MPL_AUX_PARTITION_OP_HPP_INCLUDED
   4
   5 // Copyright Eric Friedman 2003
   6 // Copyright Aleksey Gurtovoy 2004
   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 // $Id$
  15 // $Date$
  16 // $Revision$
  17
  18 #include <boost/mpl/apply.hpp>
  19 #include <boost/mpl/eval_if.hpp>
  20 #include <boost/mpl/if.hpp>
  21 #include <boost/mpl/pair.hpp>
  22 #include <boost/mpl/aux_/lambda_spec.hpp>
  23
  24 namespace boost { namespace mpl {
  25
  26 namespace aux {
  27
  28 template< typename Pred, typename In1Op, typename In2Op >
  29 struct partition_op
  30 {
  31     template< typename State, typename T >
  32     struct apply
  33     {
  34         typedef typename State::first first_;
  35         typedef typename State::second second_;
  36         typedef typename apply1< Pred,T >::type pred_;
  37
  38         typedef typename eval_if<
  39               pred_
  40             , apply2<In1Op,first_,T>
  41             , apply2<In2Op,second_,T>
  42             >::type result_;
  43
  44         typedef typename if_<
  45               pred_
  46             , pair< result_,second_ >
  47             , pair< first_,result_ >
  48             >::type type;
  49     };
  50 };
  51
  52 } // namespace aux
  53
  54 BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(3, aux::partition_op)
  55
  56 }}
  57
  58 #endif // BOOST_MPL_AUX_PARTITION_OP_HPP_INCLUDED