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_MOVE_CONSTRUCTOR(T) should evaluate to true if T(boost::move(t)) <==> memcpy
28 // BOOST_HAS_TRIVIAL_ASSIGN(T) should evaluate to true if t = u <==> memcpy
29 // BOOST_HAS_TRIVIAL_MOVE_ASSIGN(T) should evaluate to true if t = boost::move(u) <==> memcpy
30 // BOOST_HAS_TRIVIAL_DESTRUCTOR(T) should evaluate to true if ~T() has no effect
31 // BOOST_HAS_NOTHROW_CONSTRUCTOR(T) should evaluate to true if "T x;" can not throw
32 // BOOST_HAS_NOTHROW_COPY(T) should evaluate to true if T(t) can not throw
33 // BOOST_HAS_NOTHROW_ASSIGN(T) should evaluate to true if t = u can not throw
34 // BOOST_HAS_VIRTUAL_DESTRUCTOR(T) should evaluate to true T has a virtual destructor
36 // The following can also be defined: when detected our implementation is greatly simplified.
38 // BOOST_IS_ABSTRACT(T) true if T is an abstract type
39 // BOOST_IS_BASE_OF(T,U) true if T is a base class of U
40 // BOOST_IS_CLASS(T) true if T is a class type (and not a union)
41 // BOOST_IS_CONVERTIBLE(T,U) true if T is convertible to U
42 // BOOST_IS_ENUM(T) true is T is an enum
43 // BOOST_IS_POLYMORPHIC(T) true if T is a polymorphic type
44 // BOOST_ALIGNMENT_OF(T) should evaluate to the alignment requirements of type T.
46 #ifdef BOOST_HAS_SGI_TYPE_TRAITS
47 // Hook into SGI's __type_traits class, this will pick up user supplied
48 // specializations as well as SGI - compiler supplied specializations.
49 # include <boost/type_traits/is_same.hpp>
51 // There are two different versions of type_traits.h on NetBSD on Spark
52 // use an implicit include via algorithm instead, to make sure we get
53 // the same version as the std lib:
56 # include <type_traits.h>
58 # define BOOST_IS_POD(T) ::boost::is_same< typename ::__type_traits<T>::is_POD_type, ::__true_type>::value
59 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_default_constructor, ::__true_type>::value
60 # define BOOST_HAS_TRIVIAL_COPY(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_copy_constructor, ::__true_type>::value
61 # define BOOST_HAS_TRIVIAL_ASSIGN(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_assignment_operator, ::__true_type>::value
62 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_destructor, ::__true_type>::value
65 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
69 #if defined(__MSL_CPP__) && (__MSL_CPP__ >= 0x8000)
70 // Metrowerks compiler is acquiring intrinsic type traits support
71 // post version 8. We hook into the published interface to pick up
72 // user defined specializations as well as compiler intrinsics as
73 // and when they become available:
74 # include <msl_utility>
75 # define BOOST_IS_UNION(T) BOOST_STD_EXTENSION_NAMESPACE::is_union<T>::value
76 # define BOOST_IS_POD(T) BOOST_STD_EXTENSION_NAMESPACE::is_POD<T>::value
77 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_default_ctor<T>::value
78 # define BOOST_HAS_TRIVIAL_COPY(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_copy_ctor<T>::value
79 # define BOOST_HAS_TRIVIAL_ASSIGN(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_assignment<T>::value
80 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_dtor<T>::value
81 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
84 #if (defined(BOOST_MSVC) && defined(BOOST_MSVC_FULL_VER) && (BOOST_MSVC_FULL_VER >=140050215))\
85 || (defined(BOOST_INTEL) && defined(_MSC_VER) && (_MSC_VER >= 1500))
86 # include <boost/type_traits/is_same.hpp>
87 # include <boost/type_traits/is_function.hpp>
89 # define BOOST_IS_UNION(T) __is_union(T)
90 # define BOOST_IS_POD(T) (__is_pod(T) && __has_trivial_constructor(T))
91 # define BOOST_IS_EMPTY(T) __is_empty(T)
92 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) __has_trivial_constructor(T)
93 # define BOOST_HAS_TRIVIAL_COPY(T) (__has_trivial_copy(T)|| ( ::boost::is_pod<T>::value && !::boost::is_volatile<T>::value))
94 # 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))
95 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) (__has_trivial_destructor(T) || ::boost::is_pod<T>::value)
96 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) (__has_nothrow_constructor(T) || ::boost::has_trivial_constructor<T>::value)
97 # define BOOST_HAS_NOTHROW_COPY(T) (__has_nothrow_copy(T) || ::boost::has_trivial_copy<T>::value)
98 # define BOOST_HAS_NOTHROW_ASSIGN(T) (__has_nothrow_assign(T) || ::boost::has_trivial_assign<T>::value)
99 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) __has_virtual_destructor(T)
101 # define BOOST_IS_ABSTRACT(T) __is_abstract(T)
102 # define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_same<T,U>::value)
103 # define BOOST_IS_CLASS(T) __is_class(T)
104 # define BOOST_IS_CONVERTIBLE(T,U) ((__is_convertible_to(T,U) || (is_same<T,U>::value && !is_function<U>::value)) && !__is_abstract(U))
105 # define BOOST_IS_ENUM(T) __is_enum(T)
106 // This one doesn't quite always do the right thing:
107 // # define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
108 // This one fails if the default alignment has been changed with /Zp:
109 // # define BOOST_ALIGNMENT_OF(T) __alignof(T)
111 # if defined(_MSC_VER) && (_MSC_VER >= 1700)
112 # define BOOST_HAS_TRIVIAL_MOVE_CONSTRUCTOR(T) ((__has_trivial_move_constructor(T) || ::boost::is_pod<T>::value) && !::boost::is_volatile<T>::value)
113 # define BOOST_HAS_TRIVIAL_MOVE_ASSIGN(T) ((__has_trivial_move_assign(T) || ::boost::is_pod<T>::value) && ! ::boost::is_const<T>::value && !::boost::is_volatile<T>::value)
116 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
119 #if defined(__DMC__) && (__DMC__ >= 0x848)
120 // For Digital Mars C++, www.digitalmars.com
121 # define BOOST_IS_UNION(T) (__typeinfo(T) & 0x400)
122 # define BOOST_IS_POD(T) (__typeinfo(T) & 0x800)
123 # define BOOST_IS_EMPTY(T) (__typeinfo(T) & 0x1000)
124 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) (__typeinfo(T) & 0x10)
125 # define BOOST_HAS_TRIVIAL_COPY(T) (__typeinfo(T) & 0x20)
126 # define BOOST_HAS_TRIVIAL_ASSIGN(T) (__typeinfo(T) & 0x40)
127 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) (__typeinfo(T) & 0x8)
128 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) (__typeinfo(T) & 0x80)
129 # define BOOST_HAS_NOTHROW_COPY(T) (__typeinfo(T) & 0x100)
130 # define BOOST_HAS_NOTHROW_ASSIGN(T) (__typeinfo(T) & 0x200)
131 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) (__typeinfo(T) & 0x4)
132 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
135 #if defined(BOOST_CLANG) && defined(__has_feature)
137 # include <boost/type_traits/is_same.hpp>
138 # include <boost/type_traits/is_reference.hpp>
139 # include <boost/type_traits/is_volatile.hpp>
141 # if __has_feature(is_union)
142 # define BOOST_IS_UNION(T) __is_union(T)
144 # if (!defined(__GLIBCXX__) || (__GLIBCXX__ >= 20080306 && __GLIBCXX__ != 20080519)) && __has_feature(is_pod)
145 # define BOOST_IS_POD(T) __is_pod(T)
147 # if (!defined(__GLIBCXX__) || (__GLIBCXX__ >= 20080306 && __GLIBCXX__ != 20080519)) && __has_feature(is_empty)
148 # define BOOST_IS_EMPTY(T) __is_empty(T)
150 # if __has_feature(has_trivial_constructor)
151 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) __has_trivial_constructor(T)
153 # if __has_feature(has_trivial_copy)
154 # define BOOST_HAS_TRIVIAL_COPY(T) (__has_trivial_copy(T) && !is_reference<T>::value && !is_volatile<T>::value)
156 # if __has_feature(has_trivial_assign)
157 # define BOOST_HAS_TRIVIAL_ASSIGN(T) (__has_trivial_assign(T) && !is_volatile<T>::value)
159 # if __has_feature(has_trivial_destructor)
160 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) __has_trivial_destructor(T)
162 # if __has_feature(has_nothrow_constructor)
163 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) __has_nothrow_constructor(T)
165 # if __has_feature(has_nothrow_copy)
166 # define BOOST_HAS_NOTHROW_COPY(T) (__has_nothrow_copy(T) && !is_volatile<T>::value && !is_reference<T>::value)
168 # if __has_feature(has_nothrow_assign)
169 # define BOOST_HAS_NOTHROW_ASSIGN(T) (__has_nothrow_assign(T) && !is_volatile<T>::value)
171 # if __has_feature(has_virtual_destructor)
172 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) __has_virtual_destructor(T)
174 # if __has_feature(is_abstract)
175 # define BOOST_IS_ABSTRACT(T) __is_abstract(T)
177 # if __has_feature(is_base_of)
178 # define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_same<T,U>::value)
180 # if __has_feature(is_class)
181 # define BOOST_IS_CLASS(T) __is_class(T)
183 # if __has_feature(is_convertible_to)
184 # include <boost/type_traits/is_abstract.hpp>
185 # define BOOST_IS_CONVERTIBLE(T,U) (__is_convertible_to(T,U) && !::boost::is_abstract<U>::value)
187 # if __has_feature(is_enum)
188 # define BOOST_IS_ENUM(T) __is_enum(T)
190 # if __has_feature(is_polymorphic)
191 # define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
193 # if __has_feature(has_trivial_move_constructor)
194 # define BOOST_HAS_TRIVIAL_MOVE_CONSTRUCTOR(T) __has_trivial_move_constructor(T)
196 # if __has_feature(has_trivial_move_assign)
197 # define BOOST_HAS_TRIVIAL_MOVE_ASSIGN(T) __has_trivial_move_assign(T)
199 # define BOOST_ALIGNMENT_OF(T) __alignof(T)
201 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
204 #if defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 3) && !defined(__GCCXML__))) && !defined(BOOST_CLANG)
205 # include <boost/type_traits/is_same.hpp>
206 # include <boost/type_traits/is_reference.hpp>
207 # include <boost/type_traits/is_volatile.hpp>
210 # define BOOST_INTEL_TT_OPTS || is_pod<T>::value
212 # define BOOST_INTEL_TT_OPTS
215 # define BOOST_IS_UNION(T) __is_union(T)
216 # define BOOST_IS_POD(T) __is_pod(T)
217 # define BOOST_IS_EMPTY(T) __is_empty(T)
218 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) ((__has_trivial_constructor(T) BOOST_INTEL_TT_OPTS) && ! ::boost::is_volatile<T>::value)
219 # define BOOST_HAS_TRIVIAL_COPY(T) ((__has_trivial_copy(T) BOOST_INTEL_TT_OPTS) && !is_reference<T>::value && ! ::boost::is_volatile<T>::value)
220 # define BOOST_HAS_TRIVIAL_ASSIGN(T) ((__has_trivial_assign(T) BOOST_INTEL_TT_OPTS) && ! ::boost::is_volatile<T>::value && ! ::boost::is_const<T>::value)
221 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) (__has_trivial_destructor(T) BOOST_INTEL_TT_OPTS)
222 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) (__has_nothrow_constructor(T) BOOST_INTEL_TT_OPTS)
223 # define BOOST_HAS_NOTHROW_COPY(T) ((__has_nothrow_copy(T) BOOST_INTEL_TT_OPTS) && !is_volatile<T>::value && !is_reference<T>::value)
224 # define BOOST_HAS_NOTHROW_ASSIGN(T) ((__has_nothrow_assign(T) BOOST_INTEL_TT_OPTS) && !is_volatile<T>::value && !is_const<T>::value)
225 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) __has_virtual_destructor(T)
227 # define BOOST_IS_ABSTRACT(T) __is_abstract(T)
228 # define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_same<T,U>::value)
229 # define BOOST_IS_CLASS(T) __is_class(T)
230 # define BOOST_IS_ENUM(T) __is_enum(T)
231 # define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
232 # if (!defined(unix) && !defined(__unix__)) || defined(__LP64__)
233 // GCC sometimes lies about alignment requirements
234 // of type double on 32-bit unix platforms, use the
235 // old implementation instead in that case:
236 # define BOOST_ALIGNMENT_OF(T) __alignof__(T)
239 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
242 #if defined(__ghs__) && (__GHS_VERSION_NUMBER >= 600)
243 # include <boost/type_traits/is_same.hpp>
244 # include <boost/type_traits/is_reference.hpp>
245 # include <boost/type_traits/is_volatile.hpp>
247 # define BOOST_IS_UNION(T) __is_union(T)
248 # define BOOST_IS_POD(T) __is_pod(T)
249 # define BOOST_IS_EMPTY(T) __is_empty(T)
250 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) __has_trivial_constructor(T)
251 # define BOOST_HAS_TRIVIAL_COPY(T) (__has_trivial_copy(T) && !is_reference<T>::value && !is_volatile<T>::value)
252 # define BOOST_HAS_TRIVIAL_ASSIGN(T) (__has_trivial_assign(T) && !is_volatile<T>::value)
253 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) __has_trivial_destructor(T)
254 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) __has_nothrow_constructor(T)
255 # define BOOST_HAS_NOTHROW_COPY(T) (__has_nothrow_copy(T) && !is_volatile<T>::value && !is_reference<T>::value)
256 # define BOOST_HAS_NOTHROW_ASSIGN(T) (__has_nothrow_assign(T) && !is_volatile<T>::value)
257 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) __has_virtual_destructor(T)
259 # define BOOST_IS_ABSTRACT(T) __is_abstract(T)
260 # define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_same<T,U>::value)
261 # define BOOST_IS_CLASS(T) __is_class(T)
262 # define BOOST_IS_ENUM(T) __is_enum(T)
263 # define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
264 # define BOOST_ALIGNMENT_OF(T) __alignof__(T)
266 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
269 # if defined(__CODEGEARC__)
270 # include <boost/type_traits/is_same.hpp>
271 # include <boost/type_traits/is_reference.hpp>
272 # include <boost/type_traits/is_volatile.hpp>
273 # include <boost/type_traits/is_void.hpp>
275 # define BOOST_IS_UNION(T) __is_union(T)
276 # define BOOST_IS_POD(T) __is_pod(T)
277 # define BOOST_IS_EMPTY(T) __is_empty(T)
278 # define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) (__has_trivial_default_constructor(T))
279 # define BOOST_HAS_TRIVIAL_COPY(T) (__has_trivial_copy_constructor(T) && !is_volatile<T>::value && !is_reference<T>::value)
280 # define BOOST_HAS_TRIVIAL_ASSIGN(T) (__has_trivial_assign(T) && !is_volatile<T>::value)
281 # define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) (__has_trivial_destructor(T))
282 # define BOOST_HAS_NOTHROW_CONSTRUCTOR(T) (__has_nothrow_default_constructor(T))
283 # define BOOST_HAS_NOTHROW_COPY(T) (__has_nothrow_copy_constructor(T) && !is_volatile<T>::value && !is_reference<T>::value)
284 # define BOOST_HAS_NOTHROW_ASSIGN(T) (__has_nothrow_assign(T) && !is_volatile<T>::value)
285 # define BOOST_HAS_VIRTUAL_DESTRUCTOR(T) __has_virtual_destructor(T)
287 # define BOOST_IS_ABSTRACT(T) __is_abstract(T)
288 # define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_void<T>::value && !is_void<U>::value)
289 # define BOOST_IS_CLASS(T) __is_class(T)
290 # define BOOST_IS_CONVERTIBLE(T,U) (__is_convertible(T,U) || is_void<U>::value)
291 # define BOOST_IS_ENUM(T) __is_enum(T)
292 # define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
293 # define BOOST_ALIGNMENT_OF(T) alignof(T)
295 # define BOOST_HAS_TYPE_TRAITS_INTRINSICS
298 #endif // BOOST_TT_INTRINSICS_HPP_INCLUDED