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64 lines
1.9 KiB
64 lines
1.9 KiB
3 years ago
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2006 Dan Marsden
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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_EQUAL_TO_IMPL_20060128_1423)
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#define FUSION_EQUAL_TO_IMPL_20060128_1423
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/mpl.hpp>
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#include <boost/mpl/lambda.hpp>
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#include <boost/mpl/and.hpp>
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#include <boost/mpl/transform_view.hpp>
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#include <boost/mpl/zip_view.hpp>
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#include <boost/mpl/vector.hpp>
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#include <boost/mpl/unpack_args.hpp>
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#include <boost/mpl/find_if.hpp>
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#include <boost/mpl/end.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/equal_to.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/fusion/iterator/equal_to.hpp>
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namespace boost { namespace fusion {
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struct zip_view_iterator_tag;
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namespace detail
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{
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template<typename It1, typename It2>
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struct zip_iterators_equal
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{
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typedef mpl::zip_view<mpl::vector2<typename It1::iterators, typename It2::iterators> > zipped;
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typedef mpl::transform_view<zipped, mpl::unpack_args<result_of::equal_to<mpl::_,mpl::_> > > transformed;
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typedef typename mpl::find_if<transformed, mpl::equal_to<mpl::_, mpl::false_> >::type found;
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typedef typename is_same<typename mpl::end<transformed>::type, found>::type type;
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};
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}
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namespace extension
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{
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template<typename Tag>
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struct equal_to_impl;
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template<>
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struct equal_to_impl<zip_view_iterator_tag>
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{
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template<typename It1, typename It2>
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struct apply
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: detail::zip_iterators_equal<It1, It2>::type
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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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