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Diffstat (limited to 'boost/fusion/adapted/boost_array/detail/at_impl.hpp')
-rw-r--r-- | boost/fusion/adapted/boost_array/detail/at_impl.hpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/boost/fusion/adapted/boost_array/detail/at_impl.hpp b/boost/fusion/adapted/boost_array/detail/at_impl.hpp new file mode 100644 index 0000000000..6df8858663 --- /dev/null +++ b/boost/fusion/adapted/boost_array/detail/at_impl.hpp @@ -0,0 +1,45 @@ +/*============================================================================= + Copyright (c) 2001-2011 Joel de Guzman + Copyright (c) 2005-2006 Dan Marsden + + Distributed under the Boost Software License, Version 1.0. (See accompanying + file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +==============================================================================*/ +#if !defined(BOOST_FUSION_AT_IMPL_27122005_1241) +#define BOOST_FUSION_AT_IMPL_27122005_1241 + +#include <boost/type_traits/is_const.hpp> + +#include <boost/mpl/if.hpp> + +namespace boost { namespace fusion { + + struct boost_array_tag; + + namespace extension + { + template<typename T> + struct at_impl; + + template<> + struct at_impl<boost_array_tag> + { + template<typename Sequence, typename N> + struct apply + { + typedef typename mpl::if_< + is_const<Sequence>, + typename Sequence::const_reference, + typename Sequence::reference>::type type; + + static type + call(Sequence& seq) + { + return seq[N::value]; + } + }; + }; + } +}} + +#endif |