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+/*=============================================================================
+ Copyright (c) 2001-2011 Joel de Guzman
+ Copyright (c) 2005 Eric Niebler
+
+ Distributed under the Boost Software License, Version 1.0. (See accompanying
+ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+==============================================================================*/
+#if !defined(FUSION_CONS_ITERATOR_07172005_0849)
+#define FUSION_CONS_ITERATOR_07172005_0849
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/type_traits/add_const.hpp>
+#include <boost/fusion/support/iterator_base.hpp>
+#include <boost/fusion/container/list/detail/deref_impl.hpp>
+#include <boost/fusion/container/list/detail/next_impl.hpp>
+#include <boost/fusion/container/list/detail/value_of_impl.hpp>
+#include <boost/fusion/container/list/detail/equal_to_impl.hpp>
+#include <boost/fusion/container/list/list_fwd.hpp>
+
+namespace boost { namespace fusion
+{
+ struct nil_;
+ struct cons_iterator_tag;
+ struct forward_traversal_tag;
+
+ template <typename Cons>
+ struct cons_iterator_identity;
+
+ template <typename Cons = nil_>
+ struct cons_iterator : iterator_base<cons_iterator<Cons> >
+ {
+ typedef cons_iterator_tag fusion_tag;
+ typedef forward_traversal_tag category;
+ typedef Cons cons_type;
+ typedef cons_iterator_identity<
+ typename add_const<Cons>::type>
+ identity;
+
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ explicit cons_iterator(cons_type& in_cons) BOOST_NOEXCEPT
+ : cons(in_cons) {}
+
+ cons_type& cons;
+
+ private:
+ // silence MSVC warning C4512: assignment operator could not be generated
+ cons_iterator& operator= (cons_iterator const&);
+ };
+
+ struct nil_iterator : iterator_base<nil_iterator>
+ {
+ typedef forward_traversal_tag category;
+ typedef cons_iterator_tag fusion_tag;
+ typedef nil_ cons_type;
+ typedef cons_iterator_identity<
+ add_const<nil_>::type>
+ identity;
+
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ nil_iterator() BOOST_NOEXCEPT {}
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ explicit nil_iterator(nil_ const&) BOOST_NOEXCEPT {}
+ };
+
+ template <>
+ struct cons_iterator<nil_> : nil_iterator
+ {
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ cons_iterator() BOOST_NOEXCEPT {}
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ explicit cons_iterator(nil_ const&) BOOST_NOEXCEPT {}
+ };
+
+ template <>
+ struct cons_iterator<nil_ const> : nil_iterator
+ {
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ cons_iterator() BOOST_NOEXCEPT {}
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ explicit cons_iterator(nil_ const&) BOOST_NOEXCEPT {}
+ };
+
+ template <>
+ struct cons_iterator<list<> > : nil_iterator
+ {
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ cons_iterator() BOOST_NOEXCEPT {}
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ explicit cons_iterator(nil_ const&) BOOST_NOEXCEPT {}
+ };
+
+ template <>
+ struct cons_iterator<list<> const> : nil_iterator
+ {
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ cons_iterator() BOOST_NOEXCEPT {}
+ BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+ explicit cons_iterator(nil_ const&) BOOST_NOEXCEPT {}
+ };
+}}
+
+#ifdef BOOST_FUSION_WORKAROUND_FOR_LWG_2408
+namespace std
+{
+ template <typename Cons>
+ struct iterator_traits< ::boost::fusion::cons_iterator<Cons> >
+ { };
+}
+#endif
+
+#endif