[857] | 1 | /*=============================================================================
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| 2 | Copyright (c) 2003 Joel de Guzman
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| 3 | Copyright (c) 2004 Peder Holt
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| 4 |
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| 5 | Use, modification and distribution is subject to the Boost Software
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| 6 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 7 | http://www.boost.org/LICENSE_1_0.txt)
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| 8 | ==============================================================================*/
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| 9 | #if !defined(FUSION_ITERATOR_EQUAL_TO_HPP)
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| 10 | #define FUSION_ITERATOR_EQUAL_TO_HPP
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| 11 |
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| 12 | #include <boost/spirit/fusion/detail/config.hpp>
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| 13 | #include <boost/spirit/fusion/iterator/as_fusion_iterator.hpp>
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| 14 | #include <boost/type_traits/is_same.hpp>
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| 15 | #include <boost/type_traits/add_const.hpp>
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| 16 |
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| 17 | namespace boost { namespace fusion
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| 18 | {
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| 19 | namespace meta
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| 20 | {
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| 21 | template <typename Tag>
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| 22 | struct equal_to_impl
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| 23 | {
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| 24 | template <typename I1, typename I2>
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| 25 | struct apply
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| 26 | {
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| 27 | typedef typename
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| 28 | is_same<
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| 29 | typename add_const<I1>::type
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| 30 | , typename add_const<I2>::type
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| 31 | >::type
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| 32 | type;
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| 33 | BOOST_STATIC_CONSTANT(bool, value = FUSION_GET_VALUE(type));
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| 34 | };
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| 35 | };
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| 36 |
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| 37 | template <typename I1, typename I2>
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| 38 | struct equal_to
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| 39 | : detail::bool_base<
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| 40 | typename equal_to_impl<typename as_fusion_iterator<I1>::type::tag>::
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| 41 | template apply<
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| 42 | typename as_fusion_iterator<I1>::type
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| 43 | , typename as_fusion_iterator<I2>::type
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| 44 | >::type
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| 45 | > {};
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| 46 | }
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| 47 | }}
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| 48 |
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| 49 | #endif
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| 50 |
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