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[857] | 1 | /*=============================================================================
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| 2 | Copyright (c) 2001-2003 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_SEQUENCE_SIZE_HPP)
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| 10 | #define FUSION_SEQUENCE_SIZE_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/sequence/as_fusion_sequence.hpp>
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| 14 |
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| 15 | namespace boost { namespace fusion
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| 16 | {
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| 17 | ///////////////////////////////////////////////////////////////////////////
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| 18 | //
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| 19 | // size metafunction
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| 20 | //
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| 21 | // Get the size of a Sequence. Usage:
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| 22 | //
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| 23 | // size<Sequence>::value
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| 24 | //
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| 25 | ///////////////////////////////////////////////////////////////////////////
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| 26 | namespace meta
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| 27 | {
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| 28 | template <typename Tag>
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| 29 | struct size_impl
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| 30 | {
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| 31 | template <typename Sequence>
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| 32 | struct apply {};
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| 33 | };
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| 34 |
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| 35 | template <typename Sequence>
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| 36 | struct size
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| 37 | : size_impl<typename as_fusion_sequence<Sequence>::type::tag>::
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| 38 | template apply<typename as_fusion_sequence<Sequence>::type>
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| 39 | {};
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| 40 | }
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| 41 | }}
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| 42 |
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| 43 | #endif
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