46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2005-2006 Dan Marsden
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(BOOST_FUSION_STD_ARRAY_AT_IMPL_01062013_1700)
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#define BOOST_FUSION_STD_ARRAY_AT_IMPL_01062013_1700
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#include <boost/type_traits/is_const.hpp>
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#include <boost/mpl/if.hpp>
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namespace boost { namespace fusion {
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struct std_array_tag;
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namespace extension
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{
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template<typename T>
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struct at_impl;
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template<>
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struct at_impl<std_array_tag>
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{
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template<typename Sequence, typename N>
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struct apply
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{
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typedef typename mpl::if_<
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is_const<Sequence>,
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typename Sequence::const_reference,
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typename Sequence::reference>::type type;
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static type
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call(Sequence& seq)
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{
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return seq[N::value];
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}
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};
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};
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}
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}}
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#endif
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