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uobject.h
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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 ******************************************************************************
5 *
6 * Copyright (C) 2002-2012, International Business Machines
7 * Corporation and others. All Rights Reserved.
8 *
9 ******************************************************************************
10 * file name: uobject.h
11 * encoding: UTF-8
12 * tab size: 8 (not used)
13 * indentation:4
14 *
15 * created on: 2002jun26
16 * created by: Markus W. Scherer
17 */
18
19 #ifndef __UOBJECT_H__
20 #define __UOBJECT_H__
21
22 #include "unicode/utypes.h"
23
43 #ifndef U_NO_THROW
44 #define U_NO_THROW throw()
45 #endif
46
49 /*===========================================================================*/
50 /* UClassID-based RTTI */
51 /*===========================================================================*/
52
93 typedef void* UClassID;
94
95 U_NAMESPACE_BEGIN
96
112 class U_COMMON_API UMemory {
113 public:
114
115 /* test versions for debugging shaper heap memory problems */
116 #ifdef SHAPER_MEMORY_DEBUG
117 static void * NewArray(int size, int count);
118 static void * GrowArray(void * array, int newSize );
119 static void FreeArray(void * array );
120 #endif
121
122 #if U_OVERRIDE_CXX_ALLOCATION
123
131 static void * U_EXPORT2 operator new(size_t size) U_NO_THROW;
132
138 static void * U_EXPORT2 operator new[](size_t size) U_NO_THROW;
139
148 static void U_EXPORT2 operator delete(void *p) U_NO_THROW;
149
155 static void U_EXPORT2 operator delete[](void *p) U_NO_THROW;
156
157 #if U_HAVE_PLACEMENT_NEW
158
163 static inline void * U_EXPORT2 operator new(size_t, void *ptr) U_NO_THROW { return ptr; }
164
170 static inline void U_EXPORT2 operator delete(void *, void *) U_NO_THROW {}
171 #endif /* U_HAVE_PLACEMENT_NEW */
172 #if U_HAVE_DEBUG_LOCATION_NEW
173
180 static void * U_EXPORT2 operator new(size_t size, const char* file, int line) U_NO_THROW;
188 static void U_EXPORT2 operator delete(void* p, const char* file, int line) U_NO_THROW;
189 #endif /* U_HAVE_DEBUG_LOCATION_NEW */
190 #endif /* U_OVERRIDE_CXX_ALLOCATION */
191
192 /*
193 * Assignment operator not declared. The compiler will provide one
194 * which does nothing since this class does not contain any data members.
195 * API/code coverage may show the assignment operator as present and
196 * untested - ignore.
197 * Subclasses need this assignment operator if they use compiler-provided
198 * assignment operators of their own. An alternative to not declaring one
199 * here would be to declare and empty-implement a protected or public one.
200 UMemory &UMemory::operator=(const UMemory &);
201 */
202 };
203
223 class U_COMMON_API UObject : public UMemory {
224 public:
230 virtual ~UObject();
231
241 virtual UClassID getDynamicClassID() const;
242
243 protected:
244 // the following functions are protected to prevent instantiation and
245 // direct use of UObject itself
246
247 // default constructor
248 // inline UObject() {}
249
250 // copy constructor
251 // inline UObject(const UObject &other) {}
252
253 #if 0
254 // TODO Sometime in the future. Implement operator==().
255 // (This comment inserted in 2.2)
256 // some or all of the following "boilerplate" functions may be made public
257 // in a future ICU4C release when all subclasses implement them
258
259 // assignment operator
260 // (not virtual, see "Taligent's Guide to Designing Programs" pp.73..74)
261 // commented out because the implementation is the same as a compiler's default
262 // UObject &operator=(const UObject &other) { return *this; }
263
264 // comparison operators
265 virtual inline UBool operator==(const UObject &other) const { return this==&other; }
266 inline UBool operator!=(const UObject &other) const { return !operator==(other); }
267
268 // clone() commented out from the base class:
269 // some compilers do not support co-variant return types
270 // (i.e., subclasses would have to return UObject * as well, instead of SubClass *)
271 // see also UObject class documentation.
272 // virtual UObject *clone() const;
273 #endif
274
275 /*
276 * Assignment operator not declared. The compiler will provide one
277 * which does nothing since this class does not contain any data members.
278 * API/code coverage may show the assignment operator as present and
279 * untested - ignore.
280 * Subclasses need this assignment operator if they use compiler-provided
281 * assignment operators of their own. An alternative to not declaring one
282 * here would be to declare and empty-implement a protected or public one.
283 UObject &UObject::operator=(const UObject &);
284 */
285 };
286
287 #ifndef U_HIDE_INTERNAL_API
288
295 #define UOBJECT_DEFINE_RTTI_IMPLEMENTATION(myClass) \
296 UClassID U_EXPORT2 myClass::getStaticClassID() { \
297 static char classID = 0; \
298 return (UClassID)&classID; \
299 } \
300 UClassID myClass::getDynamicClassID() const \
301 { return myClass::getStaticClassID(); }
302
303
312 #define UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(myClass) \
313 UClassID U_EXPORT2 myClass::getStaticClassID() { \
314 static char classID = 0; \
315 return (UClassID)&classID; \
316 }
317
318 #endif /* U_HIDE_INTERNAL_API */
319
320 U_NAMESPACE_END
321
322 #endif
icu::operator==
U_EXPORT UBool operator==(const StringPiece &x, const StringPiece &y)
Global operator == for StringPiece.
UClassID
void * UClassID
UClassID is used to identify classes without using the compiler&#39;s RTTI.
Definition: uobject.h:93
U_NAMESPACE_BEGIN
#define U_NAMESPACE_BEGIN
This is used to begin a declaration of a public ICU C++ API.
Definition: uversion.h:131
icu::operator!=
UBool operator!=(const StringPiece &x, const StringPiece &y)
Global operator != for StringPiece.
Definition: stringpiece.h:218
U_NAMESPACE_END
#define U_NAMESPACE_END
This is used to end a declaration of a public ICU C++ API.
Definition: uversion.h:132
utypes.h
Basic definitions for ICU, for both C and C++ APIs.
U_COMMON_API
#define U_COMMON_API
Set to export library symbols from inside the common library, and to import them from outside...
Definition: utypes.h:359
icu::UObject
UObject is the common ICU "boilerplate" class.
Definition: uobject.h:223
icu::UMemory
UMemory is the common ICU base class.
Definition: uobject.h:112
UBool
int8_t UBool
The ICU boolean type.
Definition: umachine.h:236