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typeinfo.h (232950) typeinfo.h (233235)
1/*
2 * Copyright 2010-2011 PathScale, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.

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21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <stddef.h>
28#include "abi_namespace.h"
1/*
2 * Copyright 2010-2011 PathScale, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.

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21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <stddef.h>
28#include "abi_namespace.h"
29#include "typeinfo"
30
31namespace ABI_NAMESPACE
32{
29
30namespace ABI_NAMESPACE
31{
32 struct __class_type_info;
33}
34namespace std
35{
33 /**
36 /**
37 * Standard type info class. The layout of this class is specified by the
38 * ABI. The layout of the vtable is not, but is intended to be
39 * compatible with the GNU ABI.
40 *
41 * Unlike the GNU version, the vtable layout is considered semi-private.
42 */
43 class type_info
44 {
45 public:
46 /**
47 * Virtual destructor. This class must have one virtual function to
48 * ensure that it has a vtable.
49 */
50 virtual ~type_info();
51 bool operator==(const type_info &) const;
52 bool operator!=(const type_info &) const;
53 bool before(const type_info &) const;
54 const char* name() const;
55 type_info();
56 private:
57 type_info(const type_info& rhs);
58 type_info& operator= (const type_info& rhs);
59 const char *__type_name;
60 /*
61 * The following functions are in this order to match the
62 * vtable layout of libsupc++. This allows libcxxrt to be used
63 * with libraries that depend on this.
64 *
65 * These functions are in the public headers for libstdc++, so
66 * we have to assume that someone will probably call them and
67 * expect them to work. Their names must also match the names used in
68 * libsupc++, so that code linking against this library can subclass
69 * type_info and correctly fill in the values in the vtables.
70 */
71 public:
72 /**
73 * Catch function. Allows external libraries to implement
74 * their own basic types. This is used, for example, in the
75 * GNUstep Objective-C runtime to allow Objective-C types to be
76 * caught in G++ catch blocks.
77 *
78 * The outer parameter indicates the number of outer pointers
79 * in the high bits. The low bit indicates whether the
80 * pointers are const qualified.
81 */
82 virtual bool __do_catch(const type_info *thrown_type,
83 void **thrown_object,
84 unsigned outer) const;
85 /**
86 * Performs an upcast. This is used in exception handling to
87 * cast from subclasses to superclasses. If the upcast is
88 * possible, it returns true and adjusts the pointer. If the
89 * upcast is not possible, it returns false and does not adjust
90 * the pointer.
91 */
92 virtual bool __do_upcast(
93 const ABI_NAMESPACE::__class_type_info *target,
94 void **thrown_object) const
95 {
96 return false;
97 }
98 /**
99 * Returns true if this is some pointer type, false otherwise.
100 */
101 virtual bool __is_pointer_p() const { return false; }
102 /**
103 * Returns true if this is some function type, false otherwise.
104 */
105 virtual bool __is_function_p() const { return false; }
106 };
107}
108
109
110namespace ABI_NAMESPACE
111{
112 /**
34 * Primitive type info, for intrinsic types.
35 */
36 struct __fundamental_type_info : public std::type_info
37 {
38 virtual ~__fundamental_type_info();
39 };
40 /**
41 * Type info for arrays.
42 */
43 struct __array_type_info : public std::type_info
44 {
45 virtual ~__array_type_info();
46 };
47 /**
48 * Type info for functions.
49 */
50 struct __function_type_info : public std::type_info
51 {
52 virtual ~__function_type_info();
113 * Primitive type info, for intrinsic types.
114 */
115 struct __fundamental_type_info : public std::type_info
116 {
117 virtual ~__fundamental_type_info();
118 };
119 /**
120 * Type info for arrays.
121 */
122 struct __array_type_info : public std::type_info
123 {
124 virtual ~__array_type_info();
125 };
126 /**
127 * Type info for functions.
128 */
129 struct __function_type_info : public std::type_info
130 {
131 virtual ~__function_type_info();
132 virtual bool __is_function_p() const { return true; }
53 };
54 /**
55 * Type info for enums.
56 */
57 struct __enum_type_info : public std::type_info
58 {
59 virtual ~__enum_type_info();
60 };
61
62 /**
63 * Base class for class type info. Used only for tentative definitions.
64 */
65 struct __class_type_info : public std::type_info
66 {
67 virtual ~__class_type_info();
68 /**
69 * Function implementing dynamic casts.
70 */
133 };
134 /**
135 * Type info for enums.
136 */
137 struct __enum_type_info : public std::type_info
138 {
139 virtual ~__enum_type_info();
140 };
141
142 /**
143 * Base class for class type info. Used only for tentative definitions.
144 */
145 struct __class_type_info : public std::type_info
146 {
147 virtual ~__class_type_info();
148 /**
149 * Function implementing dynamic casts.
150 */
71 virtual void *cast_to(void *obj,
72 const struct __class_type_info *other) const;
73 /**
74 * Function returning whether a cast from this type to another type is
75 * possible.
76 */
77 virtual bool can_cast_to(const struct __class_type_info *other) const;
151 virtual void *cast_to(void *obj, const struct __class_type_info *other) const;
152 virtual bool __do_upcast(const __class_type_info *target,
153 void **thrown_object) const
154 {
155 return this == target;
156 }
78 };
79
80 /**
81 * Single-inheritance class type info. This is used for classes containing
82 * a single non-virtual base class at offset 0.
83 */
84 struct __si_class_type_info : public __class_type_info
85 {
86 virtual ~__si_class_type_info();
87 const __class_type_info *__base_type;
157 };
158
159 /**
160 * Single-inheritance class type info. This is used for classes containing
161 * a single non-virtual base class at offset 0.
162 */
163 struct __si_class_type_info : public __class_type_info
164 {
165 virtual ~__si_class_type_info();
166 const __class_type_info *__base_type;
167 virtual bool __do_upcast(
168 const ABI_NAMESPACE::__class_type_info *target,
169 void **thrown_object) const;
88 virtual void *cast_to(void *obj, const struct __class_type_info *other) const;
170 virtual void *cast_to(void *obj, const struct __class_type_info *other) const;
89 virtual bool can_cast_to(const struct __class_type_info *other) const;
90 };
91
92 /**
93 * Type info for base classes. Classes with multiple bases store an array
94 * of these, one for each superclass.
95 */
96 struct __base_class_type_info
97 {

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161 */
162 enum __flags_masks
163 {
164 /** The class has non-diamond repeated inheritance. */
165 __non_diamond_repeat_mask = 0x1,
166 /** The class is diamond shaped. */
167 __diamond_shaped_mask = 0x2
168 };
171 };
172
173 /**
174 * Type info for base classes. Classes with multiple bases store an array
175 * of these, one for each superclass.
176 */
177 struct __base_class_type_info
178 {

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242 */
243 enum __flags_masks
244 {
245 /** The class has non-diamond repeated inheritance. */
246 __non_diamond_repeat_mask = 0x1,
247 /** The class is diamond shaped. */
248 __diamond_shaped_mask = 0x2
249 };
250 virtual bool __do_upcast(
251 const ABI_NAMESPACE::__class_type_info *target,
252 void **thrown_object) const;
169 virtual void *cast_to(void *obj, const struct __class_type_info *other) const;
253 virtual void *cast_to(void *obj, const struct __class_type_info *other) const;
170 virtual bool can_cast_to(const struct __class_type_info *other) const;
171 };
172
173 /**
174 * Base class used for both pointer and pointer-to-member type info.
175 */
176 struct __pbase_type_info : public std::type_info
177 {
178 virtual ~__pbase_type_info();

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196 __volatile_mask = 0x2,
197 /** Pointer has restrict qualifier. */
198 __restrict_mask = 0x4,
199 /** Pointer points to an incomplete type. */
200 __incomplete_mask = 0x8,
201 /** Pointer is a pointer to a member of an incomplete class. */
202 __incomplete_class_mask = 0x10
203 };
254 };
255
256 /**
257 * Base class used for both pointer and pointer-to-member type info.
258 */
259 struct __pbase_type_info : public std::type_info
260 {
261 virtual ~__pbase_type_info();

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279 __volatile_mask = 0x2,
280 /** Pointer has restrict qualifier. */
281 __restrict_mask = 0x4,
282 /** Pointer points to an incomplete type. */
283 __incomplete_mask = 0x8,
284 /** Pointer is a pointer to a member of an incomplete class. */
285 __incomplete_class_mask = 0x10
286 };
287 virtual bool __is_pointer_p() const { return true; }
288 virtual bool __do_catch(const type_info *thrown_type,
289 void **thrown_object,
290 unsigned outer) const;
204 };
205
206 /**
207 * Pointer type info.
208 */
209 struct __pointer_type_info : public __pbase_type_info
210 {
211 virtual ~__pointer_type_info();

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292
293 /**
294 * Pointer type info.
295 */
296 struct __pointer_type_info : public __pbase_type_info
297 {
298 virtual ~__pointer_type_info();

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