148 lines
4.6 KiB
Plaintext
148 lines
4.6 KiB
Plaintext
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(FUSION_ITERATOR_ADAPTER_08112011_0942)
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#define FUSION_ITERATOR_ADAPTER_08112011_0942
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/support/category_of.hpp>
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#include <boost/fusion/iterator/advance.hpp>
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#include <boost/fusion/iterator/deref.hpp>
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#include <boost/fusion/iterator/distance.hpp>
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#include <boost/fusion/iterator/equal_to.hpp>
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#include <boost/fusion/iterator/iterator_facade.hpp>
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#include <boost/fusion/iterator/next.hpp>
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#include <boost/fusion/iterator/prior.hpp>
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#include <boost/fusion/iterator/value_of.hpp>
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#include <boost/type_traits/remove_const.hpp>
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namespace boost { namespace fusion
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{
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template <typename Derived_, typename Iterator_,
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typename Category = typename traits::category_of<Iterator_>::type>
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struct iterator_adapter
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: iterator_facade<Derived_, Category>
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{
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typedef typename
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remove_const<Iterator_>::type
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iterator_base_type;
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iterator_base_type iterator_base;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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iterator_adapter(iterator_base_type const& iterator_base_)
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: iterator_base(iterator_base_) {}
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// default implementation
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template <typename I1, typename I2>
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struct equal_to
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: result_of::equal_to<
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typename I1::iterator_base_type
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, typename I2::iterator_base_type
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>
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{};
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// default implementation
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template <typename Iterator, typename N>
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struct advance
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{
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typedef typename Derived_::template make<
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typename result_of::advance<
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typename Iterator::iterator_base_type, N
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>::type>::type
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type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Iterator const& it)
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{
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return type(fusion::advance<N>(it.iterator_base));
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}
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};
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// default implementation
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template <typename First, typename Last>
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struct distance
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: result_of::distance<
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typename First::iterator_base_type
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, typename Last::iterator_base_type
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>
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{};
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// default implementation
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template <typename Iterator>
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struct value_of
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: result_of::value_of<
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typename Iterator::iterator_base_type
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>
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{};
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// default implementation
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template <typename Iterator>
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struct deref
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{
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typedef typename
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result_of::deref<
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typename Iterator::iterator_base_type
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>::type
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type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Iterator const& it)
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{
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return fusion::deref(it.iterator_base);
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}
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};
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// default implementation
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template <typename Iterator>
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struct next
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{
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typedef typename Derived_::template make<
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typename result_of::next<
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typename Iterator::iterator_base_type
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>::type>::type
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type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Iterator const& i)
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{
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return type(fusion::next(i.iterator_base));
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}
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};
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// default implementation
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template <typename Iterator>
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struct prior
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{
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typedef typename Derived_::template make<
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typename result_of::prior<
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typename Iterator::iterator_base_type
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>::type>::type
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type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Iterator const& i)
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{
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return type(fusion::prior(i.iterator_base));
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}
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};
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};
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}}
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#ifdef BOOST_FUSION_WORKAROUND_FOR_LWG_2408
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namespace std
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{
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template <typename Derived, typename Iterator, typename Category>
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struct iterator_traits< ::boost::fusion::iterator_adapter<Derived, Iterator, Category> >
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{ };
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}
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#endif
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#endif
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