1 /*=============================================================================
2     Copyright (c) 2001-2009 Joel de Guzman
3     Copyright (c) 2005-2006 Dan Marsden
4     Copyright (c) 2010 Christopher Schmidt
5 
6     Distributed under the Boost Software License, Version 1.0. (See accompanying
7     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
8 ==============================================================================*/
9 
10 #ifndef BOOST_FUSION_ADAPTED_ADT_DETAIL_EXTENSION_HPP
11 #define BOOST_FUSION_ADAPTED_ADT_DETAIL_EXTENSION_HPP
12 
13 #include <boost/fusion/support/config.hpp>
14 #include <boost/type_traits/remove_const.hpp>
15 #include <boost/type_traits/remove_reference.hpp>
16 #include <boost/fusion/support/as_const.hpp>
17 #include <boost/fusion/adapted/struct/detail/extension.hpp>
18 
19 namespace boost { namespace fusion
20 {
21     namespace detail
22     {
23         template <typename T, typename Dummy>
24         struct get_identity
25           : remove_const<typename remove_reference<T>::type>
26         {};
27     }
28 
29     namespace extension
30     {
31         // Overload as_const() to unwrap adt_attribute_proxy.
32         template <typename T, int N, bool Const>
33         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
as_const(const adt_attribute_proxy<T,N,Const> & proxy)34         typename adt_attribute_proxy<T, N, Const>::type as_const(const adt_attribute_proxy<T, N, Const>& proxy)
35         {
36             return proxy.get();
37         }
38     }
39 }}
40 
41 #endif
42