| /*============================================================================= | |
| Copyright (c) 2001-2006 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 |