forked from boostorg/fusion
118 lines
3.3 KiB
C++
118 lines
3.3 KiB
C++
/*=============================================================================
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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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namespace boost { namespace fusion
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{
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template <typename Derived_, typename Iterator_>
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struct iterator_adapter
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: iterator_facade<
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Derived_
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, typename Iterator_::category>
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{
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typedef Iterator_ 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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: 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
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>
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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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