| /*============================================================================= |
| Copyright (c) 2001-2007 Joel de Guzman |
| Copyright (c) 2005-2007 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_KEY_IMPL_20070508_2248) |
| #define BOOST_FUSION_AT_KEY_IMPL_20070508_2248 |
| |
| #include <boost/fusion/support/detail/access.hpp> |
| |
| namespace boost { namespace fusion |
| { |
| struct struct_tag; |
| |
| namespace extension |
| { |
| template<typename T> |
| struct at_key_impl; |
| |
| template <typename Struct, typename Key> |
| struct struct_assoc_member; |
| |
| template <> |
| struct at_key_impl<struct_tag> |
| { |
| template <typename Sequence, typename Key> |
| struct apply |
| { |
| typedef typename |
| extension::struct_assoc_member<Sequence, Key> |
| element; |
| |
| typedef typename |
| mpl::eval_if< |
| is_const<Sequence> |
| , detail::cref_result<element> |
| , detail::ref_result<element> |
| >::type |
| type; |
| |
| static type |
| call(Sequence& seq) |
| { |
| return extension:: |
| struct_assoc_member<Sequence, Key>::call(seq); |
| } |
| }; |
| }; |
| } |
| }} |
| |
| #endif |