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

   1
   2 #ifndef BOOST_MPL_FOR_EACH_HPP_INCLUDED
   3 #define BOOST_MPL_FOR_EACH_HPP_INCLUDED
   4
   5 // Copyright Aleksey Gurtovoy 2000-2008
   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/is_sequence.hpp>
  18 #include <boost/mpl/begin_end.hpp>
  19 #include <boost/mpl/apply.hpp>
  20 #include <boost/mpl/bool.hpp>
  21 #include <boost/mpl/next_prior.hpp>
  22 #include <boost/mpl/deref.hpp>
  23 #include <boost/mpl/identity.hpp>
  24 #include <boost/mpl/assert.hpp>
  25 #include <boost/mpl/aux_/config/gpu.hpp>
  26 #include <boost/mpl/aux_/unwrap.hpp>
  27
  28 #include <boost/type_traits/is_same.hpp>
  29 #include <boost/utility/value_init.hpp>
  30
  31 namespace boost { namespace mpl {
  32
  33 namespace aux {
  34
  35 template< bool done = true >
  36 struct for_each_impl
  37 {
  38     template<
  39           typename Iterator
  40         , typename LastIterator
  41         , typename TransformFunc
  42         , typename F
  43         >
  44     BOOST_MPL_CFG_GPU_ENABLED
  45     static void execute(
  46           Iterator*
  47         , LastIterator*
  48         , TransformFunc*
  49         , F
  50         )
  51     {
  52     }
  53 };
  54
  55 template<>
  56 struct for_each_impl<false>
  57 {
  58     template<
  59           typename Iterator
  60         , typename LastIterator
  61         , typename TransformFunc
  62         , typename F
  63         >
  64     BOOST_MPL_CFG_GPU_ENABLED
  65     static void execute(
  66           Iterator*
  67         , LastIterator*
  68         , TransformFunc*
  69         , F f
  70         )
  71     {
  72         typedef typename deref<Iterator>::type item;
  73         typedef typename apply1<TransformFunc,item>::type arg;
  74
  75         // dwa 2002/9/10 -- make sure not to invoke undefined behavior
  76         // when we pass arg.
  77         value_initialized<arg> x;
  78         aux::unwrap(f, 0)(boost::get(x));
  79
  80         typedef typename mpl::next<Iterator>::type iter;
  81         for_each_impl<boost::is_same<iter,LastIterator>::value>
  82             ::execute( static_cast<iter*>(0), static_cast<LastIterator*>(0), static_cast<TransformFunc*>(0), f);
  83     }
  84 };
  85
  86 } // namespace aux
  87
  88 // agurt, 17/mar/02: pointer default parameters are necessary to workaround
  89 // MSVC 6.5 function template signature's mangling bug
  90 template<
  91       typename Sequence
  92     , typename TransformOp
  93     , typename F
  94     >
  95 BOOST_MPL_CFG_GPU_ENABLED
  96 inline
  97 void for_each(F f, Sequence* = 0, TransformOp* = 0)
  98 {
  99     BOOST_MPL_ASSERT(( is_sequence<Sequence> ));
 100
 101     typedef typename begin<Sequence>::type first;
 102     typedef typename end<Sequence>::type last;
 103
 104     aux::for_each_impl< boost::is_same<first,last>::value >
 105         ::execute(static_cast<first*>(0), static_cast<last*>(0), static_cast<TransformOp*>(0), f);
 106 }
 107
 108 template<
 109       typename Sequence
 110     , typename F
 111     >
 112 BOOST_MPL_CFG_GPU_ENABLED
 113 inline
 114 void for_each(F f, Sequence* = 0)
 115 {
 116   // jfalcou: fully qualifying this call so it doesnt clash with phoenix::for_each
 117   // ons ome compilers -- done on 02/28/2011
 118   boost::mpl::for_each<Sequence, identity<> >(f);
 119 }
 120
 121 }}
 122
 123 #endif // BOOST_MPL_FOR_EACH_HPP_INCLUDED