for_each_type.h

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#pragma once
 
#ifdef __GNUC__
#pragma GCC system_header 
#endif
 
#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 <type_traits>
 
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)
    {
      using arg = typename boost::mpl::deref<Iterator>::type;
 
#if (defined _WIN32 && defined _MSC_VER && !defined(__clang__))
      boost::mpl::aux::unwrap (f, 0).operator()<arg> ();
#else
      boost::mpl::aux::unwrap (f, 0).template operator()<arg> ();
#endif
 
      using iter = typename boost::mpl::next<Iterator>::type;
      for_each_type_impl<std::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> ));
    using first = typename boost::mpl::begin<Sequence>::type;
    using last = typename boost::mpl::end<Sequence>::type;
    for_each_type_impl<std::is_same<first, last>::value>::template execute<first, last, F> (f);
  }
 
  //////////////////////////////////////////////////////////////////////////////////////////////
  template <typename Sequence1, typename Sequence2>
  struct intersect 
  { 
    using type = typename boost::mpl::remove_if<Sequence1, boost::mpl::not_<boost::mpl::contains<Sequence2, boost::mpl::_1> > >::type; 
  }; 
}