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_ITERATOR_ADAPTER_08112011_0942)
Chris@16: #define FUSION_ITERATOR_ADAPTER_08112011_0942
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@101: #include <boost/fusion/support/category_of.hpp>
Chris@101: #include <boost/fusion/iterator/advance.hpp>
Chris@101: #include <boost/fusion/iterator/deref.hpp>
Chris@101: #include <boost/fusion/iterator/distance.hpp>
Chris@101: #include <boost/fusion/iterator/equal_to.hpp>
Chris@16: #include <boost/fusion/iterator/iterator_facade.hpp>
Chris@101: #include <boost/fusion/iterator/next.hpp>
Chris@101: #include <boost/fusion/iterator/prior.hpp>
Chris@101: #include <boost/fusion/iterator/value_of.hpp>
Chris@16: #include <boost/type_traits/remove_const.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion
Chris@16: {
Chris@16:     template <typename Derived_, typename Iterator_,
Chris@101:         typename Category = typename traits::category_of<Iterator_>::type>
Chris@16:     struct iterator_adapter
Chris@16:         : iterator_facade<Derived_, Category>
Chris@16:     {
Chris@16:         typedef typename
Chris@16:             remove_const<Iterator_>::type
Chris@16:         iterator_base_type;
Chris@16:         iterator_base_type iterator_base;
Chris@16: 
Chris@101:         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:         iterator_adapter(iterator_base_type const& iterator_base_)
Chris@16:             : iterator_base(iterator_base_) {}
Chris@16: 
Chris@16:         // default implementation
Chris@16:         template <typename I1, typename I2>
Chris@16:         struct equal_to
Chris@16:             : result_of::equal_to<
Chris@16:                 typename I1::iterator_base_type
Chris@16:               , typename I2::iterator_base_type
Chris@16:             >
Chris@16:         {};
Chris@16: 
Chris@16:         // default implementation
Chris@16:         template <typename Iterator, typename N>
Chris@16:         struct advance
Chris@16:         {
Chris@16:             typedef typename Derived_::template make<
Chris@16:                 typename result_of::advance<
Chris@16:                     typename Iterator::iterator_base_type, N
Chris@16:                 >::type>::type
Chris@16:             type;
Chris@16: 
Chris@101:             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:             static type
Chris@16:             call(Iterator const& it)
Chris@16:             {
Chris@16:                 return type(fusion::advance<N>(it.iterator_base));
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         // default implementation
Chris@16:         template <typename First, typename Last>
Chris@16:         struct distance
Chris@16:             : result_of::distance<
Chris@16:                 typename First::iterator_base_type
Chris@16:               , typename Last::iterator_base_type
Chris@16:             >
Chris@16:         {};
Chris@16: 
Chris@16:         // default implementation
Chris@16:         template <typename Iterator>
Chris@16:         struct value_of
Chris@16:             : result_of::value_of<
Chris@16:                 typename Iterator::iterator_base_type
Chris@16:             >
Chris@16:         {};
Chris@16: 
Chris@16:         // default implementation
Chris@16:         template <typename Iterator>
Chris@16:         struct deref
Chris@16:         {
Chris@16:             typedef typename
Chris@16:                 result_of::deref<
Chris@16:                     typename Iterator::iterator_base_type
Chris@16:                 >::type
Chris@16:             type;
Chris@16: 
Chris@101:             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:             static type
Chris@16:             call(Iterator const& it)
Chris@16:             {
Chris@16:                 return fusion::deref(it.iterator_base);
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         // default implementation
Chris@16:         template <typename Iterator>
Chris@16:         struct next
Chris@16:         {
Chris@16:             typedef typename Derived_::template make<
Chris@16:                 typename result_of::next<
Chris@16:                     typename Iterator::iterator_base_type
Chris@16:                 >::type>::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(fusion::next(i.iterator_base));
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         // default implementation
Chris@16:         template <typename Iterator>
Chris@16:         struct prior
Chris@16:         {
Chris@16:             typedef typename Derived_::template make<
Chris@16:                 typename result_of::prior<
Chris@16:                     typename Iterator::iterator_base_type
Chris@16:                 >::type>::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(fusion::prior(i.iterator_base));
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 Derived, typename Iterator, typename Category>
Chris@101:     struct iterator_traits< ::boost::fusion::iterator_adapter<Derived, Iterator, Category> >
Chris@101:     { };
Chris@101: }
Chris@16: #endif
Chris@101: 
Chris@101: #endif