| /*============================================================================= |
| 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_STD_ARRAY_AT_IMPL_01062013_1700) |
| #define BOOST_FUSION_STD_ARRAY_AT_IMPL_01062013_1700 |
| |
| #include <boost/type_traits/is_const.hpp> |
| |
| #include <boost/mpl/if.hpp> |
| |
| namespace boost { namespace fusion { |
| |
| struct std_array_tag; |
| |
| namespace extension |
| { |
| template<typename T> |
| struct at_impl; |
| |
| template<> |
| struct at_impl<std_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 |
