2 #ifndef BOOST_MPL_VECTOR_AUX_FRONT_HPP_INCLUDED
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3 #define BOOST_MPL_VECTOR_AUX_FRONT_HPP_INCLUDED
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5 // Copyright Aleksey Gurtovoy 2000-2008
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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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11 // See http://www.boost.org/libs/mpl for documentation.
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13 // $Id: front.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
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14 // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
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15 // $Revision: 49267 $
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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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24 namespace boost { namespace mpl {
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26 #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)
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29 struct front_impl< aux::vector_tag >
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31 template< typename Vector > struct apply
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39 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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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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44 template< typename Vector > struct apply
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46 typedef typename Vector::item0 type;
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50 #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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52 #endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES
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56 #endif // BOOST_MPL_VECTOR_AUX_FRONT_HPP_INCLUDED
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