ICU 74.1 74.1

usetiter.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 * Copyright (c) 2002-2014, International Business Machines
6 * Corporation and others. All Rights Reserved.
7 **********************************************************************
8 */
9 #ifndef USETITER_H
10 #define USETITER_H
11
12 #include "unicode/utypes.h"
13
14 #if U_SHOW_CPLUSPLUS_API
15
16 #include "unicode/uobject.h"
17 #include "unicode/unistr.h"
18
24 U_NAMESPACE_BEGIN
25
26 class UnicodeSet;
27 class UnicodeString;
28
67 class U_COMMON_API UnicodeSetIterator final : public UObject {
73 enum { IS_STRING = -1 };
74
79 UChar32 codepoint;
80
89 UChar32 codepointEnd;
90
96 const UnicodeString* string;
97
98 public:
99
106 UnicodeSetIterator(const UnicodeSet& set);
107
114 UnicodeSetIterator();
115
120 virtual ~UnicodeSetIterator();
121
137 inline UBool isString() const;
138
144 inline UChar32 getCodepoint() const;
145
152 inline UChar32 getCodepointEnd() const;
153
165 const UnicodeString& getString();
166
176 inline UnicodeSetIterator &skipToStrings() {
177 // Finish code point/range iteration.
178 range = endRange;
179 endElement = -1;
180 nextElement = 0;
181 return *this;
182 }
183
206 UBool next();
207
227 UBool nextRange();
228
236 void reset(const UnicodeSet& set);
237
242 void reset();
243
249 static UClassID U_EXPORT2 getStaticClassID();
250
256 virtual UClassID getDynamicClassID() const override;
257
258 // ======================= PRIVATES ===========================
259
260 private:
261
262 // endElement and nextElements are really UChar32's, but we keep
263 // them as signed int32_t's so we can do comparisons with
264 // endElement set to -1. Leave them as int32_t's.
267 const UnicodeSet* set;
270 int32_t endRange;
273 int32_t range;
276 int32_t endElement;
279 int32_t nextElement;
282 int32_t nextString;
285 int32_t stringCount;
286
291 UnicodeString *cpString;
292
295 UnicodeSetIterator(const UnicodeSetIterator&) = delete;
296
299 UnicodeSetIterator& operator=(const UnicodeSetIterator&) = delete;
300
303 void loadRange(int32_t range);
304 };
305
306 inline UBool UnicodeSetIterator::isString() const {
307 return codepoint < 0;
308 }
309
310 inline UChar32 UnicodeSetIterator::getCodepoint() const {
311 return codepoint;
312 }
313
314 inline UChar32 UnicodeSetIterator::getCodepointEnd() const {
315 return codepointEnd;
316 }
317
318
319 U_NAMESPACE_END
320
321 #endif /* U_SHOW_CPLUSPLUS_API */
322
323 #endif
icu::UObject
UObject is the common ICU "boilerplate" class.
Definition: uobject.h:223
icu::UnicodeSetIterator
UnicodeSetIterator iterates over the contents of a UnicodeSet.
Definition: usetiter.h:67
icu::UnicodeSetIterator::next
UBool next()
Advances the iteration position to the next element in the set, which can be either a single code poi...
icu::UnicodeSetIterator::UnicodeSetIterator
UnicodeSetIterator(const UnicodeSet &set)
Create an iterator over the given set.
icu::UnicodeSetIterator::reset
void reset()
Resets this iterator to the start of the set.
icu::UnicodeSetIterator::nextRange
UBool nextRange()
Returns the next element in the set, either a code point range or a string.
icu::UnicodeSetIterator::skipToStrings
UnicodeSetIterator & skipToStrings()
Skips over the remaining code points/ranges, if any.
Definition: usetiter.h:176
icu::UnicodeSetIterator::getString
const UnicodeString & getString()
Returns the current string, if isString() returned true.
icu::UnicodeSetIterator::reset
void reset(const UnicodeSet &set)
Sets this iterator to visit the elements of the given set and resets it to the start of that set.
icu::UnicodeSetIterator::getDynamicClassID
virtual UClassID getDynamicClassID() const override
ICU "poor man's RTTI", returns a UClassID for the actual class.
icu::UnicodeSetIterator::getStaticClassID
static UClassID getStaticClassID()
ICU "poor man's RTTI", returns a UClassID for this class.
icu::UnicodeSetIterator::~UnicodeSetIterator
virtual ~UnicodeSetIterator()
Destructor.
icu::UnicodeSetIterator::UnicodeSetIterator
UnicodeSetIterator()
Create an iterator over nothing.
icu::UnicodeSet
A mutable set of Unicode characters and multicharacter strings.
Definition: uniset.h:285
icu::UnicodeString
UnicodeString is a string class that stores Unicode characters directly and provides similar function...
Definition: unistr.h:296
UChar32
int32_t UChar32
Define UChar32 as a type for single Unicode code points.
Definition: umachine.h:435
UBool
int8_t UBool
The ICU boolean type, a signed-byte integer.
Definition: umachine.h:247
unistr.h
C++ API: Unicode String.
uobject.h
C++ API: Common ICU base class UObject.
UClassID
void * UClassID
UClassID is used to identify classes without using the compiler's RTTI.
Definition: uobject.h:96
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:300