[857] | 1 | /*=============================================================================
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| 2 | Copyright (c) 2001-2003 Joel de Guzman
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| 3 |
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| 4 | Use, modification and distribution is subject to the Boost Software
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| 5 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 6 | http://www.boost.org/LICENSE_1_0.txt)
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| 7 | ==============================================================================*/
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| 8 | #if !defined(FUSION_SEQUENCE_TUPLE_ELEMENT_HPP)
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| 9 | #define FUSION_SEQUENCE_TUPLE_ELEMENT_HPP
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| 10 |
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| 11 | #include <boost/spirit/fusion/sequence/value_at.hpp>
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| 12 |
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| 13 | namespace boost { namespace fusion
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| 14 | {
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| 15 | ///////////////////////////////////////////////////////////////////////////
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| 16 | //
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| 17 | // tuple_element metafunction
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| 18 | //
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| 19 | // Given a constant integer N and a Sequence, returns the
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| 20 | // tuple element type at slot N. (N is a zero based index). Usage:
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| 21 | //
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| 22 | // tuple_element<N, Sequence>::type
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| 23 | //
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| 24 | // This metafunction is provided here for compatibility with the
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| 25 | // tuples TR1 specification. This metafunction forwards to
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| 26 | // meta::value_at_c<Sequence>.
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| 27 | //
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| 28 | ///////////////////////////////////////////////////////////////////////////
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| 29 | template <int N, typename Sequence>
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| 30 | struct tuple_element : meta::value_at_c<Sequence, N> {};
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| 31 | }}
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| 32 |
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| 33 | #endif
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