48 lines
1.5 KiB
Plaintext
48 lines
1.5 KiB
Plaintext
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/*=============================================================================
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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_BEGIN_IMPL_05062005_0903)
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#define FUSION_BEGIN_IMPL_05062005_0903
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namespace boost { namespace fusion
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{
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struct filter_view_tag;
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template <typename Category, typename First, typename Last, typename Pred>
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struct filter_iterator;
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namespace extension
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{
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template <typename Tag>
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struct begin_impl;
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template <>
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struct begin_impl<filter_view_tag>
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{
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template <typename Sequence>
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struct apply
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{
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typedef typename Sequence::first_type first_type;
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typedef typename Sequence::last_type last_type;
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typedef typename Sequence::pred_type pred_type;
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typedef typename Sequence::category category;
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typedef filter_iterator<category, first_type, last_type, pred_type> type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Sequence& s)
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{
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return type(s.first());
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}
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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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