fixing stuff
[dyninst.git] / dynutil / h / dyn_detail / boost / type_traits / is_const.hpp
1
2 //  (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, 
3 //      Howard Hinnant and John Maddock 2000. 
4 //  (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001
5
6 //  Use, modification and distribution are subject to the Boost Software License,
7 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
8 //  http://www.boost.org/LICENSE_1_0.txt).
9 //
10 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.
11
12 //    Fixed is_pointer, is_reference, is_const, is_volatile, is_same, 
13 //    is_member_pointer based on the Simulated Partial Specialization work 
14 //    of Mat Marcus and Jesse Jones. See  http://opensource.adobe.com or 
15 //    http://groups.yahoo.com/group/boost/message/5441 
16 //    Some workarounds in here use ideas suggested from "Generic<Programming>: 
17 //    Mappings between Types and Values" 
18 //    by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html).
19
20
21 #ifndef DYN_DETAIL_DYN_DETAIL_BOOST_TT_IS_CONST_HPP_INCLUDED
22 #define DYN_DETAIL_DYN_DETAIL_BOOST_TT_IS_CONST_HPP_INCLUDED
23
24 #include <dyn_detail/boost/config.hpp>
25 #include <dyn_detail/boost/detail/workaround.hpp>
26
27 #ifndef DYN_DETAIL_BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
28 #   include <dyn_detail/boost/type_traits/detail/cv_traits_impl.hpp>
29 #   ifdef __GNUC__
30 #       include <dyn_detail/boost/type_traits/is_reference.hpp>
31 #   endif
32 #   if DYN_DETAIL_BOOST_WORKAROUND(DYN_DETAIL_BOOST_MSVC, < 1400)
33 #       include <dyn_detail/boost/type_traits/remove_bounds.hpp>
34 #   endif
35 #else
36 #   include <dyn_detail/boost/type_traits/is_reference.hpp>
37 #   include <dyn_detail/boost/type_traits/is_array.hpp>
38 #   include <dyn_detail/boost/type_traits/detail/yes_no_type.hpp>
39 #   include <dyn_detail/boost/type_traits/detail/false_result.hpp>
40 #endif
41
42 // should be the last #include
43 #include <dyn_detail/boost/type_traits/detail/bool_trait_def.hpp>
44
45 namespace dyn_detail {
46 namespace boost {
47
48 #if defined( __CODEGEARC__ )
49
50 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_const,T,__is_const(T))
51
52 #elif !defined(DYN_DETAIL_BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
53
54 //* is a type T  declared const - is_const<T>
55 #if DYN_DETAIL_BOOST_WORKAROUND(DYN_DETAIL_BOOST_MSVC, < 1400)
56    DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_const,T,::dyn_detail::boost::detail::cv_traits_imp<typename remove_bounds<T>::type*>::is_const)
57 #else
58    DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_const,T,::dyn_detail::boost::detail::cv_traits_imp<T*>::is_const)
59 #endif
60 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T&,false)
61
62 #if  defined(DYN_DETAIL_BOOST_ILLEGAL_CV_REFERENCES)
63 // these are illegal specialisations; cv-qualifies applied to
64 // references have no effect according to [8.3.2p1],
65 // C++ Builder requires them though as it treats cv-qualified
66 // references as distinct types...
67 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T& const,false)
68 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T& volatile,false)
69 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T& const volatile,false)
70 #endif
71
72 #if defined(__GNUC__) && (__GNUC__ < 3)
73 // special case for gcc where illegally cv-qualified reference types can be
74 // generated in some corner cases:
75 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T const,!(::dyn_detail::boost::is_reference<T>::value))
76 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T volatile const,!(::dyn_detail::boost::is_reference<T>::value))
77 #endif
78
79 #else
80
81 namespace detail {
82
83         using ::dyn_detail::boost::type_traits::yes_type;
84         using ::dyn_detail::boost::type_traits::no_type;
85
86 yes_type is_const_tester(const volatile void*);
87 no_type is_const_tester(volatile void *);
88
89 template <bool is_ref, bool array>
90 struct is_const_helper
91     : ::dyn_detail::boost::type_traits::false_result
92 {
93 };
94
95 template <>
96 struct is_const_helper<false,false>
97 {
98     template <typename T> struct result_
99     {
100         static T* t;
101         DYN_DETAIL_BOOST_STATIC_CONSTANT(bool, value = (
102             sizeof(detail::yes_type) == sizeof(detail::is_const_tester(t))
103             ));
104     };
105 };
106
107 template <>
108 struct is_const_helper<false,true>
109 {
110     template <typename T> struct result_
111     {
112         static T t;
113         DYN_DETAIL_BOOST_STATIC_CONSTANT(bool, value = (
114             sizeof(detail::yes_type) == sizeof(detail::is_const_tester(&t))
115             ));
116     };
117 };
118
119 template <typename T>
120 struct is_const_impl
121     : is_const_helper<
122           is_reference<T>::value
123         , is_array<T>::value
124         >::template result_<T>
125 {
126 };
127
128 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_const,void,false)
129 #ifndef DYN_DETAIL_BOOST_NO_CV_VOID_SPECIALIZATIONS
130 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_const,void const,true)
131 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_const,void volatile,false)
132 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_const,void const volatile,true)
133 #endif
134
135 } // namespace detail
136
137 //* is a type T  declared const - is_const<T>
138 DYN_DETAIL_BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_const,T,::dyn_detail::boost::detail::is_const_impl<T>::value)
139
140 #endif // DYN_DETAIL_BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
141
142 } // namespace boost
143 } // namespace dyn_detail
144
145 #include <dyn_detail/boost/type_traits/detail/bool_trait_undef.hpp>
146
147 #endif // DYN_DETAIL_BOOST_TT_IS_CONST_HPP_INCLUDED
148