57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/vector/aux_/front.hpp header file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2000-02
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// Aleksey Gurtovoy
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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#ifndef BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED
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#define BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED
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#include "boost/mpl/front_fwd.hpp"
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#include "boost/mpl/vector/aux_/item.hpp"
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#include "boost/mpl/vector/aux_/tag.hpp"
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#include "boost/mpl/aux_/config/vector.hpp"
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#include "boost/config.hpp"
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namespace boost {
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namespace mpl {
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#if defined(BOOST_MPL_TYPEOF_BASED_VECTOR_IMPL)
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template<>
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struct front_traits< aux::vector_tag >
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{
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template< typename Vector > struct algorithm
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: vector_item<Vector,0>
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{
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};
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};
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#else
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#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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template< long N >
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struct front_traits< aux::vector_tag<N> >
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{
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template< typename Vector > struct algorithm
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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_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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#endif // BOOST_MPL_TYPEOF_BASED_VECTOR_IMPL
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} // namespace mpl
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} // namespace boost
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#endif // BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED
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