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