1/*=============================================================================
2 Copyright (c) 2001-2007 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#ifndef BOOST_PHOENIX_CORE_DETAIL_MEMBER_VARIABLE_HPP
8#define BOOST_PHOENIX_CORE_DETAIL_MEMBER_VARIABLE_HPP
9
10#include <boost/proto/detail/decltype.hpp>
11#include <boost/type_traits/remove_pointer.hpp>
12
13#ifdef _MSC_VER
14#pragma warning(push)
15#pragma warning(disable: 4180) // qualifier applied to function type has no meaning; ignored
16#endif
17
18namespace boost { namespace phoenix { namespace detail {
19
20 template <typename RT, typename MP>
21 struct member_variable
22 {
23 template <typename Sig>
24 struct result;
25
26 template <typename This, typename Class>
27 struct result<This(Class)>
28 : result<This(Class const &)>
29 {};
30
31 template <typename This, typename Class>
32 struct result<This(Class &)>
33 {
34 typedef typename boost::mpl::if_c<
35 boost::is_const<
36 typename boost::remove_pointer<
37 typename boost::remove_reference<Class>::type
38 >::type
39 >::value
40 , const RT&
41 , RT&
42 >::type
43 type;
44 };
45
46 member_variable(MP mp_)
47 : mp(mp_) {}
48
49 template <typename Class>
50 RT& operator()(Class& obj) const
51 {
52 BOOST_PROTO_USE_GET_POINTER();
53
54 typedef typename proto::detail::class_member_traits<MP>::class_type class_type;
55 return (BOOST_PROTO_GET_POINTER(class_type, obj)->*mp);
56 }
57
58 template <typename Class>
59 RT& operator()(Class* obj) const
60 {
61 return obj->*mp;
62 }
63
64 template <typename Class>
65 RT const& operator()(Class const& obj) const
66 {
67 BOOST_PROTO_USE_GET_POINTER();
68
69 typedef typename proto::detail::class_member_traits<MP>::class_type class_type;
70 return (BOOST_PROTO_GET_POINTER(class_type, obj)->*mp);
71 }
72
73 template <typename Class>
74 RT const& operator()(Class const* obj) const
75 {
76 return obj->*mp;
77 }
78
79 MP mp;
80 };
81}}}
82
83#ifdef _MSC_VER
84#pragma warning(pop)
85#endif
86
87#endif
88