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1 /*=============================================================================
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2 Copyright (c) 2001-2007 Joel de Guzman
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3
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4 Distributed under the Boost Software License, Version 1.0. (See accompanying
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5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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6 ==============================================================================*/
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7 #ifndef BOOST_PHOENIX_CORE_DETAIL_MEMBER_VARIABLE_HPP
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8 #define BOOST_PHOENIX_CORE_DETAIL_MEMBER_VARIABLE_HPP
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9
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10 #include <boost/proto/detail/decltype.hpp>
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11 #include <boost/type_traits/remove_pointer.hpp>
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12
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13 #ifdef _MSC_VER
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14 #pragma warning(push)
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15 #pragma warning(disable: 4180) // qualifier applied to function type has no meaning; ignored
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16 #endif
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17
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18 namespace boost { namespace phoenix { namespace detail {
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19
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20 template <typename RT, typename MP>
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21 struct member_variable
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22 {
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23 template <typename Sig>
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24 struct result;
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25
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26 template <typename This, typename Class>
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27 struct result<This(Class)>
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28 : result<This(Class const &)>
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29 {};
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30
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31 template <typename This, typename Class>
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32 struct result<This(Class &)>
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33 {
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34 typedef typename boost::mpl::if_c<
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35 boost::is_const<
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36 typename boost::remove_pointer<
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37 typename boost::remove_reference<Class>::type
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38 >::type
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39 >::value
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40 , const RT&
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41 , RT&
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42 >::type
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43 type;
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44 };
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45
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46 member_variable(MP mp_)
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47 : mp(mp_) {}
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48
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49 template <typename Class>
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50 RT& operator()(Class& obj) const
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51 {
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52 BOOST_PROTO_USE_GET_POINTER();
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53
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54 typedef typename proto::detail::class_member_traits<MP>::class_type class_type;
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55 return (BOOST_PROTO_GET_POINTER(class_type, obj)->*mp);
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56 }
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57
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58 template <typename Class>
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59 RT& operator()(Class* obj) const
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60 {
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61 return obj->*mp;
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62 }
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63
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64 template <typename Class>
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65 RT const& operator()(Class const& obj) const
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66 {
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67 BOOST_PROTO_USE_GET_POINTER();
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68
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69 typedef typename proto::detail::class_member_traits<MP>::class_type class_type;
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70 return (BOOST_PROTO_GET_POINTER(class_type, obj)->*mp);
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71 }
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72
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73 template <typename Class>
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74 RT const& operator()(Class const* obj) const
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75 {
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76 return obj->*mp;
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77 }
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78
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79 MP mp;
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80 };
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81 }}}
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82
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83 #ifdef _MSC_VER
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84 #pragma warning(pop)
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85 #endif
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86
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87 #endif
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