[857] | 1 |
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| 2 | #ifndef BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED
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| 3 | #define BOOST_MPL_LIST_AUX_FRONT_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 | // $Source: /cvsroot/boost/boost/boost/mpl/vector/aux_/front.hpp,v $
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| 14 | // $Date: 2004/09/02 15:41:19 $
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| 15 | // $Revision: 1.4 $
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| 16 |
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| 17 | #include <boost/mpl/front_fwd.hpp>
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| 18 | #include <boost/mpl/vector/aux_/at.hpp>
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| 19 | #include <boost/mpl/vector/aux_/tag.hpp>
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| 20 | #include <boost/mpl/aux_/nttp_decl.hpp>
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| 21 | #include <boost/mpl/aux_/config/typeof.hpp>
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| 22 | #include <boost/mpl/aux_/config/ctps.hpp>
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| 23 |
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| 24 | namespace boost { namespace mpl {
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| 25 |
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| 26 | #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)
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| 27 |
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| 28 | template<>
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| 29 | struct front_impl< aux::vector_tag >
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| 30 | {
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| 31 | template< typename Vector > struct apply
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| 32 | : v_at<Vector,0>
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| 33 | {
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| 34 | };
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| 35 | };
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| 36 |
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| 37 | #else
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| 38 |
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| 39 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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| 40 |
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| 41 | template< BOOST_MPL_AUX_NTTP_DECL(long, n_) >
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| 42 | struct front_impl< aux::vector_tag<n_> >
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| 43 | {
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| 44 | template< typename Vector > struct apply
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| 45 | {
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| 46 | typedef typename Vector::item0 type;
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| 47 | };
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| 48 | };
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| 49 |
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| 50 | #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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| 51 |
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| 52 | #endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES
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| 53 |
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| 54 | }}
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| 55 |
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| 56 | #endif // BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED
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