Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2011 Joel de Guzman
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying 
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #if !defined(FUSION_MPL_ITERATOR_05052005_0731)
Chris@16: #define FUSION_MPL_ITERATOR_05052005_0731
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <boost/fusion/support/detail/mpl_iterator_category.hpp>
Chris@16: #include <boost/fusion/iterator/iterator_facade.hpp>
Chris@16: #include <boost/type_traits/remove_const.hpp>
Chris@16: #include <boost/mpl/deref.hpp>
Chris@16: #include <boost/mpl/next.hpp>
Chris@16: #include <boost/mpl/prior.hpp>
Chris@16: #include <boost/mpl/advance.hpp>
Chris@16: #include <boost/mpl/distance.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion
Chris@16: {
Chris@16:     template <typename Iterator_>
Chris@16:     struct mpl_iterator
Chris@16:         : iterator_facade<
Chris@16:             mpl_iterator<Iterator_>
Chris@16:           , typename detail::mpl_iterator_category<typename Iterator_::category>::type
Chris@16:         >
Chris@16:     {
Chris@16:         typedef typename remove_const<Iterator_>::type iterator_type;
Chris@16: 
Chris@16:         template <typename Iterator>
Chris@16:         struct value_of : mpl::deref<typename Iterator::iterator_type> {};
Chris@16: 
Chris@16:         template <typename Iterator>
Chris@16:         struct deref
Chris@16:         {
Chris@16:             typedef typename mpl::deref<
Chris@16:                 typename Iterator::iterator_type>::type
Chris@16:             type;
Chris@16: 
Chris@101:             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:             static type
Chris@16:             call(Iterator)
Chris@16:             {
Chris@16:                 return type();
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         template <typename Iterator>
Chris@16:         struct next
Chris@16:         {
Chris@16:             typedef mpl_iterator<
Chris@16:                 typename mpl::next<typename Iterator::iterator_type>::type> 
Chris@16:             type;
Chris@16: 
Chris@101:             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:             static type
Chris@16:             call(Iterator)
Chris@16:             {
Chris@16:                 return type();
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         template <typename Iterator>
Chris@16:         struct prior
Chris@16:         {
Chris@16:             typedef mpl_iterator<
Chris@16:                 typename mpl::prior<typename Iterator::iterator_type>::type> 
Chris@16:             type;
Chris@16: 
Chris@101:             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:             static type
Chris@16:             call(Iterator)
Chris@16:             {
Chris@16:                 return type();
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         template <typename Iterator, typename N>
Chris@16:         struct advance
Chris@16:         {
Chris@16:             typedef mpl_iterator<
Chris@16:                 typename mpl::advance<typename Iterator::iterator_type, N>::type>
Chris@16:             type;
Chris@16: 
Chris@101:             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:             static type
Chris@16:             call(Iterator const& /*i*/)
Chris@16:             {
Chris@16:                 return type();
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         template <typename I1, typename I2>
Chris@16:         struct distance : 
Chris@16:             mpl::distance<
Chris@16:                 typename I1::iterator_type
Chris@16:               , typename I2::iterator_type>
Chris@16:         {
Chris@16:             typedef typename 
Chris@16:                 mpl::distance<
Chris@16:                     typename I1::iterator_type
Chris@16:                   , typename I2::iterator_type
Chris@16:                 >::type
Chris@16:             type;
Chris@16:             
Chris@101:             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:             static type
Chris@16:             call(I1 const&, I2 const&)
Chris@16:             {
Chris@16:                 return type();
Chris@16:             }
Chris@16:         };
Chris@16:     };
Chris@16: }}
Chris@16: 
Chris@101: #ifdef BOOST_FUSION_WORKAROUND_FOR_LWG_2408
Chris@101: namespace std
Chris@101: {
Chris@101:     template <typename Iterator>
Chris@101:     struct iterator_traits< ::boost::fusion::mpl_iterator<Iterator> >
Chris@101:     { };
Chris@101: }
Chris@16: #endif
Chris@16: 
Chris@101: #endif
Chris@16: 
Chris@101: