ceph/src/boost/libs/mpl/include/boost/mpl/switch.hpp

   1
   2 #ifndef BOOST_MPL_SWITCH_HPP_INCLUDED
   3 #define BOOST_MPL_SWITCH_HPP_INCLUDED
   4
   5 // Copyright Aleksey Gurtovoy 2003-2004
   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/find_if.hpp>
  18 #include <boost/mpl/deref.hpp>
  19 #include <boost/mpl/lambda.hpp>
  20 #include <boost/mpl/apply.hpp>
  21 #include <boost/mpl/pair.hpp>
  22 #include <boost/mpl/aux_/na_spec.hpp>
  23 #include <boost/mpl/aux_/lambda_support.hpp>
  24
  25 namespace boost { namespace mpl {
  26
  27 template<
  28       typename BOOST_MPL_AUX_NA_PARAM(Body)
  29     , typename BOOST_MPL_AUX_NA_PARAM(T)
  30     >
  31 struct switch_
  32 {
  33     typedef typename find_if<
  34           Body
  35         , apply1< lambda< first<_1> >, T >
  36         >::type iter_;
  37
  38     typedef typename deref<iter_>::type pair_;
  39     typedef typename lambda< typename second<pair_>::type >::type f_;
  40     typedef typename apply1<f_,T>::type type;
  41
  42     BOOST_MPL_AUX_LAMBDA_SUPPORT(2,switch_,(Body,T))
  43 };
  44
  45 BOOST_MPL_AUX_NA_SPEC(2, switch_)
  46
  47 }}
  48
  49 #endif // BOOST_MPL_SWITCH_HPP_INCLUDED