for_each_type.h

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 * $Id: for_each_type.h 3564 2011-12-16 06:11:13Z rusu $
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#ifndef PCL_FOR_EACH_TYPE_H_
#define PCL_FOR_EACH_TYPE_H_

#include <boost/mpl/is_sequence.hpp>
#include <boost/mpl/begin_end.hpp>
#include <boost/mpl/next_prior.hpp>
#include <boost/mpl/deref.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/mpl/remove_if.hpp>
#include <boost/mpl/contains.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/aux_/unwrap.hpp>
#include <boost/type_traits/is_same.hpp>

namespace pcl 
{
  template <bool done = true>
  struct for_each_type_impl
  {
    template<typename Iterator, typename LastIterator, typename F>
    static void execute (F) {}
  };

  template <>
  struct for_each_type_impl<false>
  {
    template<typename Iterator, typename LastIterator, typename F>
    static void execute (F f)
    {
      typedef typename boost::mpl::deref<Iterator>::type arg;

#if (defined _WIN32 && defined _MSC_VER)
      boost::mpl::aux::unwrap (f, 0).operator()<arg> ();
#else
      boost::mpl::aux::unwrap (f, 0).template operator()<arg> ();
#endif

      typedef typename boost::mpl::next<Iterator>::type iter;
      for_each_type_impl<boost::is_same<iter, LastIterator>::value>
        ::template execute<iter, LastIterator, F> (f);
    }
  };

  template<typename Sequence, typename F>
  inline void for_each_type (F f)
  {
    BOOST_MPL_ASSERT (( boost::mpl::is_sequence<Sequence> ));
    typedef typename boost::mpl::begin<Sequence>::type first;
    typedef typename boost::mpl::end<Sequence>::type last;
    for_each_type_impl< boost::is_same<first, last>::value >::template execute<first, last, F> (f);
  }

  template<typename Sequence1, typename Sequence2>
  struct intersect 
  { 
    typedef typename boost::mpl::remove_if<Sequence1, boost::mpl::not_<boost::mpl::contains<Sequence2, boost::mpl::_1> > >::type type; 
  }; 
}

#endif  //#ifndef PCL_FOR_EACH_TYPE_H_