1 /*=============================================================================
2     Copyright (c) 2001-2011 Joel de Guzman
3 
4     Distributed under the Boost Software License, Version 1.0. (See accompanying
5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6 ==============================================================================*/
7 #if !defined(FUSION_ACCESS_04182005_0737)
8 #define FUSION_ACCESS_04182005_0737
9 
10 #include <boost/fusion/support/config.hpp>
11 #include <boost/type_traits/add_const.hpp>
12 #include <boost/type_traits/add_reference.hpp>
13 
14 namespace boost { namespace fusion { namespace detail
15 {
16     template <typename T>
17     struct ref_result
18     {
19         typedef typename add_reference<T>::type type;
20     };
21 
22     template <typename T>
23     struct cref_result
24     {
25         typedef typename
26             add_reference<
27                 typename add_const<T>::type
28             >::type
29         type;
30     };
31 
32     template <typename T>
33     struct call_param
34     {
35         typedef T const& type;
36     };
37 
38     template <typename T>
39     struct call_param<T&>
40     {
41         typedef T& type;
42     };
43 
44     template <typename T>
45     struct call_param<T const>
46     {
47         typedef T const& type;
48     };
49 
50     template <typename T>
51     struct call_param<T volatile>
52     {
53         typedef T const& type;
54     };
55 
56     template <typename T>
57     struct call_param<T const volatile>
58     {
59         typedef T const& type;
60     };
61 
62 }}}
63 
64 #endif
65 
66