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125 lines
3.6 KiB
125 lines
3.6 KiB
/*============================================================================= |
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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/iterator/detail/advance.hpp> |
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#include <boost/fusion/iterator/iterator_facade.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 Iterator_::category> |
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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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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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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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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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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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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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#endif
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