forked from boostorg/mpl
54 lines
1.1 KiB
C++
54 lines
1.1 KiB
C++
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#ifndef BOOST_MPL_VECTOR_AUX_FRONT_HPP_INCLUDED
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#define BOOST_MPL_VECTOR_AUX_FRONT_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2008
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/mpl for documentation.
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// $Id$
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// $Date$
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// $Revision$
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#include <boost/mpl/front_fwd.hpp>
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#include <boost/mpl/vector/aux_/at.hpp>
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#include <boost/mpl/vector/aux_/tag.hpp>
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#include <boost/mpl/aux_/config/typeof.hpp>
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#include <boost/mpl/aux_/config/ctps.hpp>
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namespace boost { namespace mpl {
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#if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)
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template<>
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struct front_impl< aux::vector_tag >
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{
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template< typename Vector > struct apply
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: v_at<Vector,0>
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{
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};
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};
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#else
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template< long n_ >
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struct front_impl< aux::vector_tag<n_> >
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{
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template< typename Vector > struct apply
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{
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typedef typename Vector::item0 type;
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};
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};
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#endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES
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}}
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#endif // BOOST_MPL_VECTOR_AUX_FRONT_HPP_INCLUDED
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