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| 2 | #ifndef BOOST_MPL_AT_HPP_INCLUDED |
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| 3 | #define BOOST_MPL_AT_HPP_INCLUDED |
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| 4 | |
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| 5 | // Copyright Aleksey Gurtovoy 2000-2004 |
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| 6 | // |
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| 7 | // Distributed under the Boost Software License, Version 1.0. |
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| 8 | // (See accompanying file LICENSE_1_0.txt or copy at |
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| 9 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 10 | // |
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| 11 | // See http://www.boost.org/libs/mpl for documentation. |
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| 12 | |
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| 13 | // $Id$ |
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| 14 | // $Date$ |
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| 15 | // $Revision$ |
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| 16 | |
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| 17 | #include <boost/mpl/at_fwd.hpp> |
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| 18 | #include <boost/mpl/aux_/at_impl.hpp> |
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| 19 | #include <boost/mpl/long.hpp> |
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| 20 | #include <boost/mpl/sequence_tag.hpp> |
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| 21 | #include <boost/mpl/aux_/na_spec.hpp> |
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| 22 | #include <boost/mpl/aux_/lambda_support.hpp> |
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| 23 | #include <boost/mpl/aux_/nttp_decl.hpp> |
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| 24 | |
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| 25 | namespace boost { namespace mpl { |
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| 26 | |
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| 27 | template< |
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| 28 | typename BOOST_MPL_AUX_NA_PARAM(Sequence) |
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| 29 | , typename BOOST_MPL_AUX_NA_PARAM(N) |
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| 30 | > |
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| 31 | struct at |
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| 32 | : at_impl< typename sequence_tag<Sequence>::type > |
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| 33 | ::template apply< Sequence,N > |
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| 34 | { |
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| 35 | BOOST_MPL_AUX_LAMBDA_SUPPORT(2,at,(Sequence,N)) |
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| 36 | }; |
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| 37 | |
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| 38 | template< |
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| 39 | typename Sequence |
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| 40 | , BOOST_MPL_AUX_NTTP_DECL(long, N) |
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| 41 | > |
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| 42 | struct at_c |
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| 43 | : at_impl< typename sequence_tag<Sequence>::type > |
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| 44 | ::template apply< Sequence,mpl::long_<N> > |
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| 45 | { |
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| 46 | }; |
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| 47 | |
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| 48 | BOOST_MPL_AUX_NA_SPEC(2, at) |
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| 49 | |
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| 50 | }} |
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| 51 | |
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| 52 | #endif // BOOST_MPL_AT_HPP_INCLUDED |
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| 53 | |
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