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
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).
10 // See http://www.boost.org/libs/type_traits for most recent version including documentation.
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).
21 #ifndef BOOST_TT_IS_VOLATILE_HPP_INCLUDED
22 #define BOOST_TT_IS_VOLATILE_HPP_INCLUDED
24 #include <boost/config.hpp>
25 #include <boost/detail/workaround.hpp>
27 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
28 # include <boost/type_traits/detail/cv_traits_impl.hpp>
29 # if BOOST_WORKAROUND(BOOST_MSVC, < 1400)
30 # include <boost/type_traits/remove_bounds.hpp>
33 # include <boost/type_traits/is_reference.hpp>
34 # include <boost/type_traits/is_array.hpp>
35 # include <boost/type_traits/detail/yes_no_type.hpp>
36 # include <boost/type_traits/detail/false_result.hpp>
39 // should be the last #include
40 #include <boost/type_traits/detail/bool_trait_def.hpp>
44 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
46 //* is a type T declared volatile - is_volatile<T>
47 #if BOOST_WORKAROUND(BOOST_MSVC, < 1400)
48 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_volatile,T,::boost::detail::cv_traits_imp<typename boost::remove_bounds<T>::type*>::is_volatile)
50 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_volatile,T,::boost::detail::cv_traits_imp<T*>::is_volatile)
52 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_volatile,T&,false)
54 #if defined(__BORLANDC__) && (__BORLANDC__ < 0x600)
55 // these are illegal specialisations; cv-qualifies applied to
56 // references have no effect according to [8.3.2p1],
57 // C++ Builder requires them though as it treats cv-qualified
58 // references as distinct types...
59 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_volatile,T& const,false)
60 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_volatile,T& volatile,false)
61 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_volatile,T& const volatile,false)
68 using ::boost::type_traits::yes_type;
69 using ::boost::type_traits::no_type;
71 yes_type is_volatile_tester(void const volatile*);
72 no_type is_volatile_tester(void const*);
74 template <bool is_ref, bool array>
75 struct is_volatile_helper
76 : ::boost::type_traits::false_result
81 struct is_volatile_helper<false,false>
83 template <typename T> struct result_
86 BOOST_STATIC_CONSTANT(bool, value = (
87 sizeof(detail::yes_type) == sizeof(detail::is_volatile_tester(t))
93 struct is_volatile_helper<false,true>
95 template <typename T> struct result_
98 BOOST_STATIC_CONSTANT(bool, value = (
99 sizeof(detail::yes_type) == sizeof(detail::is_volatile_tester(&t))
104 template <typename T>
105 struct is_volatile_impl
106 : is_volatile_helper<
107 is_reference<T>::value
109 >::template result_<T>
113 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_volatile,void,false)
114 #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
115 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_volatile,void const,false)
116 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_volatile,void volatile,true)
117 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_volatile,void const volatile,true)
120 } // namespace detail
122 //* is a type T declared volatile - is_volatile<T>
123 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_volatile,T,::boost::detail::is_volatile_impl<T>::value)
125 #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
129 #include <boost/type_traits/detail/bool_trait_undef.hpp>
131 #endif // BOOST_TT_IS_VOLATILE_HPP_INCLUDED