1 // (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
2 // Use, modification and distribution are subject to the Boost Software License,
3 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
4 // http://www.boost.org/LICENSE_1_0.txt).
6 // See http://www.boost.org/libs/type_traits for most recent version including documentation.
8 #ifndef BOOST_TT_INTRINSICS_HPP_INCLUDED
9 #define BOOST_TT_INTRINSICS_HPP_INCLUDED
11 #ifndef BOOST_TT_CONFIG_HPP_INCLUDED
12 #include <boost/type_traits/config.hpp>
16 // Helper macros for builtin compiler support.
17 // If your compiler has builtin support for any of the following
18 // traits concepts, then redefine the appropriate macros to pick
19 // up on the compiler support:
21 // (these should largely ignore cv-qualifiers)
22 // BOOST_IS_UNION(T) should evaluate to true if T is a union type
23 // BOOST_IS_POD(T) should evaluate to true if T is a POD type
24 // BOOST_IS_EMPTY(T) should evaluate to true if T is an empty class type (and not a union)
25 // BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) should evaluate to true if "T x;" has no effect
26 // BOOST_HAS_TRIVIAL_COPY(T) should evaluate to true if T(t) <==> memcpy
27 // BOOST_HAS_TRIVIAL_ASSIGN(T) should evaluate to true if t = u <==> memcpy
28 // BOOST_HAS_TRIVIAL_DESTRUCTOR(T) should evaluate to true if ~T() has no effect
29 // BOOST_HAS_NOTHROW_CONSTRUCTOR(T) should evaluate to true if "T x;" can not throw
30 // BOOST_HAS_NOTHROW_COPY(T) should evaluate to true if T(t) can not throw
31 // BOOST_HAS_NOTHROW_ASSIGN(T) should evaluate to true if t = u can not throw
32 // BOOST_HAS_VIRTUAL_DESTRUCTOR(T) should evaluate to true T has a virtual destructor
34 // The following can also be defined: when detected our implementation is greatly simplified.
36 // BOOST_IS_ABSTRACT(T) true if T is an abstract type
37 // BOOST_IS_BASE_OF(T,U) true if T is a base class of U
38 // BOOST_IS_CLASS(T) true if T is a class type (and not a union)
39 // BOOST_IS_CONVERTIBLE(T,U) true if T is convertible to U
40 // BOOST_IS_ENUM(T) true is T is an enum
41 // BOOST_IS_POLYMORPHIC(T) true if T is a polymorphic type
42 // BOOST_ALIGNMENT_OF(T) should evaluate to the alignment requirements of type T.
44 #ifdef BOOST_HAS_SGI_TYPE_TRAITS
45 // Hook into SGI's __type_traits class, this will pick up user supplied
46 // specializations as well as SGI - compiler supplied specializations.
47 # include <boost/type_traits/is_same.hpp>
49 // There are two different versions of type_traits.h on NetBSD on Spark
50 // use an implicit include via algorithm instead, to make sure we get
51 // the same version as the std lib:
54 # include <type_traits.h>
56 # define BOOST_IS_POD(T) ::boost::is_same< typename ::__type_traits<T>::is_POD_type, ::__true_type>::value
57 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_default_constructor, ::__true_type>::value
58 # define BOOST_HAS_TRIVIAL_COPY(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_copy_constructor, ::__true_type>::value
59 # define BOOST_HAS_TRIVIAL_ASSIGN(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_assignment_operator, ::__true_type>::value
60 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_destructor, ::__true_type>::value
63 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
67 #if defined(__MSL_CPP__) && (__MSL_CPP__ >= 0x8000)
68 // Metrowerks compiler is acquiring intrinsic type traits support
69 // post version 8. We hook into the published interface to pick up
70 // user defined specializations as well as compiler intrinsics as
71 // and when they become available:
72 # include <msl_utility>
73 # define BOOST_IS_UNION(T) BOOST_STD_EXTENSION_NAMESPACE::is_union<T>::value
74 # define BOOST_IS_POD(T) BOOST_STD_EXTENSION_NAMESPACE::is_POD<T>::value
75 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_default_ctor<T>::value
76 # define BOOST_HAS_TRIVIAL_COPY(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_copy_ctor<T>::value
77 # define BOOST_HAS_TRIVIAL_ASSIGN(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_assignment<T>::value
78 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_dtor<T>::value
79 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
82 #if defined(BOOST_MSVC) && defined(BOOST_MSVC_FULL_VER) && (BOOST_MSVC_FULL_VER >=140050215)
83 # include <boost/type_traits/is_same.hpp>
85 # define BOOST_IS_UNION(T) __is_union(T)
86 # define BOOST_IS_POD(T) (__is_pod(T) && __has_trivial_constructor(T))
87 # define BOOST_IS_EMPTY(T) __is_empty(T)
88 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) __has_trivial_constructor(T)
89 # define BOOST_HAS_TRIVIAL_COPY(T) (__has_trivial_copy(T)|| ( ::boost::is_pod<T>::value && !::boost::is_volatile<T>::value))
90 # define BOOST_HAS_TRIVIAL_ASSIGN(T) (__has_trivial_assign(T) || ( ::boost::is_pod<T>::value && ! ::boost::is_const<T>::value && !::boost::is_volatile<T>::value))
91 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) (__has_trivial_destructor(T) || ::boost::is_pod<T>::value)
92 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) (__has_nothrow_constructor(T) || ::boost::has_trivial_constructor<T>::value)
93 # define BOOST_HAS_NOTHROW_COPY(T) (__has_nothrow_copy(T) || ::boost::has_trivial_copy<T>::value)
94 # define BOOST_HAS_NOTHROW_ASSIGN(T) (__has_nothrow_assign(T) || ::boost::has_trivial_assign<T>::value)
95 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) __has_virtual_destructor(T)
97 # define BOOST_IS_ABSTRACT(T) __is_abstract(T)
98 # define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_same<T,U>::value)
99 # define BOOST_IS_CLASS(T) __is_class(T)
100 # define BOOST_IS_CONVERTIBLE(T,U) ((__is_convertible_to(T,U) || is_same<T,U>::value) && !__is_abstract(U))
101 # define BOOST_IS_ENUM(T) __is_enum(T)
102 // This one doesn't quite always do the right thing:
103 // # define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
104 // This one fails if the default alignment has been changed with /Zp:
105 // # define BOOST_ALIGNMENT_OF(T) __alignof(T)
107 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
110 #if defined(__DMC__) && (__DMC__ >= 0x848)
111 // For Digital Mars C++, www.digitalmars.com
112 # define BOOST_IS_UNION(T) (__typeinfo(T) & 0x400)
113 # define BOOST_IS_POD(T) (__typeinfo(T) & 0x800)
114 # define BOOST_IS_EMPTY(T) (__typeinfo(T) & 0x1000)
115 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) (__typeinfo(T) & 0x10)
116 # define BOOST_HAS_TRIVIAL_COPY(T) (__typeinfo(T) & 0x20)
117 # define BOOST_HAS_TRIVIAL_ASSIGN(T) (__typeinfo(T) & 0x40)
118 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) (__typeinfo(T) & 0x8)
119 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) (__typeinfo(T) & 0x80)
120 # define BOOST_HAS_NOTHROW_COPY(T) (__typeinfo(T) & 0x100)
121 # define BOOST_HAS_NOTHROW_ASSIGN(T) (__typeinfo(T) & 0x200)
122 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) (__typeinfo(T) & 0x4)
123 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
126 #if defined(BOOST_CLANG) && defined(__has_feature)
127 # include <boost/type_traits/is_same.hpp>
128 # include <boost/type_traits/is_reference.hpp>
129 # include <boost/type_traits/is_volatile.hpp>
131 # if __has_feature(is_union)
132 # define BOOST_IS_UNION(T) __is_union(T)
134 # if __has_feature(is_pod) && defined(_LIBCPP_VERSION)
135 # define BOOST_IS_POD(T) __is_pod(T)
137 # if __has_feature(is_empty) && defined(_LIBCPP_VERSION)
138 # define BOOST_IS_EMPTY(T) __is_empty(T)
140 # if __has_feature(has_trivial_constructor)
141 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) __has_trivial_constructor(T)
143 # if __has_feature(has_trivial_copy)
144 # define BOOST_HAS_TRIVIAL_COPY(T) (__has_trivial_copy(T) && !is_reference<T>::value && !is_volatile<T>::value)
146 # if __has_feature(has_trivial_assign)
147 # define BOOST_HAS_TRIVIAL_ASSIGN(T) (__has_trivial_assign(T) && !is_volatile<T>::value)
149 # if __has_feature(has_trivial_destructor)
150 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) __has_trivial_destructor(T)
152 # if __has_feature(has_nothrow_constructor)
153 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) __has_nothrow_constructor(T)
155 # if __has_feature(has_nothrow_copy)
156 # define BOOST_HAS_NOTHROW_COPY(T) (__has_nothrow_copy(T) && !is_volatile<T>::value && !is_reference<T>::value)
158 # if __has_feature(has_nothrow_assign)
159 # define BOOST_HAS_NOTHROW_ASSIGN(T) (__has_nothrow_assign(T) && !is_volatile<T>::value)
161 # if __has_feature(has_virtual_destructor)
162 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) __has_virtual_destructor(T)
164 # if __has_feature(is_abstract)
165 # define BOOST_IS_ABSTRACT(T) __is_abstract(T)
167 # if __has_feature(is_base_of)
168 # define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_same<T,U>::value)
170 # if __has_feature(is_class)
171 # define BOOST_IS_CLASS(T) __is_class(T)
173 # if __has_feature(is_convertible_to)
174 # include <boost/type_traits/is_abstract.hpp>
175 # define BOOST_IS_CONVERTIBLE(T,U) (__is_convertible_to(T,U) && !::boost::is_abstract<U>::value)
177 # if __has_feature(is_enum)
178 # define BOOST_IS_ENUM(T) __is_enum(T)
180 # if __has_feature(is_polymorphic)
181 # define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
183 # define BOOST_ALIGNMENT_OF(T) __alignof(T)
185 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
188 #if defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 3) && !defined(__GCCXML__)))
189 # include <boost/type_traits/is_same.hpp>
190 # include <boost/type_traits/is_reference.hpp>
191 # include <boost/type_traits/is_volatile.hpp>
194 # define BOOST_INTEL_TT_OPTS || is_pod<T>::value
196 # define BOOST_INTEL_TT_OPTS
199 # define BOOST_IS_UNION(T) __is_union(T)
200 # define BOOST_IS_POD(T) __is_pod(T)
201 # define BOOST_IS_EMPTY(T) __is_empty(T)
202 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) ((__has_trivial_constructor(T) BOOST_INTEL_TT_OPTS) && ! ::boost::is_volatile<T>::value)
203 # define BOOST_HAS_TRIVIAL_COPY(T) ((__has_trivial_copy(T) BOOST_INTEL_TT_OPTS) && !is_reference<T>::value && ! ::boost::is_volatile<T>::value)
204 # define BOOST_HAS_TRIVIAL_ASSIGN(T) ((__has_trivial_assign(T) BOOST_INTEL_TT_OPTS) && ! ::boost::is_volatile<T>::value && ! ::boost::is_const<T>::value)
205 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) (__has_trivial_destructor(T) BOOST_INTEL_TT_OPTS)
206 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) (__has_nothrow_constructor(T) BOOST_INTEL_TT_OPTS)
207 # define BOOST_HAS_NOTHROW_COPY(T) ((__has_nothrow_copy(T) BOOST_INTEL_TT_OPTS) && !is_volatile<T>::value && !is_reference<T>::value)
208 # define BOOST_HAS_NOTHROW_ASSIGN(T) ((__has_nothrow_assign(T) BOOST_INTEL_TT_OPTS) && !is_volatile<T>::value && !is_const<T>::value)
209 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) __has_virtual_destructor(T)
211 # define BOOST_IS_ABSTRACT(T) __is_abstract(T)
212 # define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_same<T,U>::value)
213 # define BOOST_IS_CLASS(T) __is_class(T)
214 # define BOOST_IS_ENUM(T) __is_enum(T)
215 # define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
216 # if (!defined(unix) && !defined(__unix__)) || defined(__LP64__)
217 // GCC sometimes lies about alignment requirements
218 // of type double on 32-bit unix platforms, use the
219 // old implementation instead in that case:
220 # define BOOST_ALIGNMENT_OF(T) __alignof__(T)
223 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
226 #if defined(__ghs__) && (__GHS_VERSION_NUMBER >= 600)
227 # include <boost/type_traits/is_same.hpp>
228 # include <boost/type_traits/is_reference.hpp>
229 # include <boost/type_traits/is_volatile.hpp>
231 # define BOOST_IS_UNION(T) __is_union(T)
232 # define BOOST_IS_POD(T) __is_pod(T)
233 # define BOOST_IS_EMPTY(T) __is_empty(T)
234 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) __has_trivial_constructor(T)
235 # define BOOST_HAS_TRIVIAL_COPY(T) (__has_trivial_copy(T) && !is_reference<T>::value && !is_volatile<T>::value)
236 # define BOOST_HAS_TRIVIAL_ASSIGN(T) (__has_trivial_assign(T) && !is_volatile<T>::value)
237 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) __has_trivial_destructor(T)
238 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) __has_nothrow_constructor(T)
239 # define BOOST_HAS_NOTHROW_COPY(T) (__has_nothrow_copy(T) && !is_volatile<T>::value && !is_reference<T>::value)
240 # define BOOST_HAS_NOTHROW_ASSIGN(T) (__has_nothrow_assign(T) && !is_volatile<T>::value)
241 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) __has_virtual_destructor(T)
243 # define BOOST_IS_ABSTRACT(T) __is_abstract(T)
244 # define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_same<T,U>::value)
245 # define BOOST_IS_CLASS(T) __is_class(T)
246 # define BOOST_IS_ENUM(T) __is_enum(T)
247 # define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
248 # define BOOST_ALIGNMENT_OF(T) __alignof__(T)
250 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
253 # if defined(__CODEGEARC__)
254 # include <boost/type_traits/is_same.hpp>
255 # include <boost/type_traits/is_reference.hpp>
256 # include <boost/type_traits/is_volatile.hpp>
257 # include <boost/type_traits/is_void.hpp>
259 # define BOOST_IS_UNION(T) __is_union(T)
260 # define BOOST_IS_POD(T) __is_pod(T)
261 # define BOOST_IS_EMPTY(T) __is_empty(T)
262 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) (__has_trivial_default_constructor(T))
263 # define BOOST_HAS_TRIVIAL_COPY(T) (__has_trivial_copy_constructor(T) && !is_volatile<T>::value && !is_reference<T>::value)
264 # define BOOST_HAS_TRIVIAL_ASSIGN(T) (__has_trivial_assign(T) && !is_volatile<T>::value)
265 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) (__has_trivial_destructor(T))
266 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) (__has_nothrow_default_constructor(T))
267 # define BOOST_HAS_NOTHROW_COPY(T) (__has_nothrow_copy_constructor(T) && !is_volatile<T>::value && !is_reference<T>::value)
268 # define BOOST_HAS_NOTHROW_ASSIGN(T) (__has_nothrow_assign(T) && !is_volatile<T>::value)
269 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) __has_virtual_destructor(T)
271 # define BOOST_IS_ABSTRACT(T) __is_abstract(T)
272 # define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_void<T>::value && !is_void<U>::value)
273 # define BOOST_IS_CLASS(T) __is_class(T)
274 # define BOOST_IS_CONVERTIBLE(T,U) (__is_convertible(T,U) || is_void<U>::value)
275 # define BOOST_IS_ENUM(T) __is_enum(T)
276 # define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
277 # define BOOST_ALIGNMENT_OF(T) alignof(T)
279 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
282 #endif // BOOST_TT_INTRINSICS_HPP_INCLUDED