summaryrefslogtreecommitdiffstats
path: root/src/corelib/tools/qstring.h
blob: 47cca0d2806eb657a96f555334f155ce2cb59456 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QSTRING_H
#define QSTRING_H

#include <QtCore/qchar.h>
#include <QtCore/qbytearray.h>
#include <QtCore/qrefcount.h>
#include <QtCore/qnamespace.h>

#include <string>

#if defined(Q_OS_LINUX_ANDROID)
// std::wstring is disabled on android's glibc, as bionic lacks certain features
// that libstdc++ checks for (like mbcslen).
namespace std
{
    typedef basic_string<wchar_t> wstring;
}
#endif

#include <stdarg.h>

#ifdef truncate
#error qstring.h must be included before any header file that defines truncate
#endif

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE


class QCharRef;
class QRegExp;
class QRegularExpression;
class QString;
class QStringList;
class QTextCodec;
class QStringRef;
template <typename T> class QVector;

class QLatin1String
{
public:
    Q_DECL_CONSTEXPR inline explicit QLatin1String(const char *s) : m_size(s ? int(strlen(s)) : 0), m_data(s) {}
    Q_DECL_CONSTEXPR inline explicit QLatin1String(const char *s, int sz) : m_size(sz), m_data(s) {}
    inline explicit QLatin1String(const QByteArray &s) : m_size(int(qstrnlen(s.constData(), s.size()))), m_data(s.constData()) {}

    inline const char *latin1() const { return m_data; }
    inline int size() const { return m_size; }
    inline const char *data() const { return m_data; }

    inline bool operator==(const QString &s) const;
    inline bool operator!=(const QString &s) const;
    inline bool operator>(const QString &s) const;
    inline bool operator<(const QString &s) const;
    inline bool operator>=(const QString &s) const;
    inline bool operator<=(const QString &s) const;

#ifndef QT_NO_CAST_FROM_ASCII
    inline QT_ASCII_CAST_WARN bool operator==(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator!=(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator<(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator>(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator<=(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator>=(const char *s) const;

    inline QT_ASCII_CAST_WARN bool operator==(const QByteArray &s) const;
    inline QT_ASCII_CAST_WARN bool operator!=(const QByteArray &s) const;
    inline QT_ASCII_CAST_WARN bool operator<(const QByteArray &s) const;
    inline QT_ASCII_CAST_WARN bool operator>(const QByteArray &s) const;
    inline QT_ASCII_CAST_WARN bool operator<=(const QByteArray &s) const;
    inline QT_ASCII_CAST_WARN bool operator>=(const QByteArray &s) const;
#endif // QT_NO_CAST_FROM_ASCII

private:
    int m_size;
    const char *m_data;
};
Q_DECLARE_TYPEINFO(QLatin1String, Q_MOVABLE_TYPE);

// Qt 4.x compatibility
typedef QLatin1String QLatin1Literal;


typedef QTypedArrayData<ushort> QStringData;

#if defined(Q_COMPILER_UNICODE_STRINGS)

#define QT_UNICODE_LITERAL_II(str) u"" str
typedef char16_t qunicodechar;

#elif defined(Q_OS_WIN) \
       || (defined(__SIZEOF_WCHAR_T__) && __SIZEOF_WCHAR_T__ == 2) \
       || (!defined(__SIZEOF_WCHAR_T__) && defined(WCHAR_MAX) && (WCHAR_MAX - 0 < 65536))
// wchar_t is 2 bytes

#if defined(Q_CC_MSVC)
#    define QT_UNICODE_LITERAL_II(str) L##str
#else
#    define QT_UNICODE_LITERAL_II(str) L"" str
#endif
typedef wchar_t qunicodechar;

#else

#define QT_NO_UNICODE_LITERAL
typedef ushort qunicodechar;

#endif

Q_STATIC_ASSERT_X(sizeof(qunicodechar) == 2,
        "qunicodechar must typedef an integral type of size 2");

#ifndef QT_NO_UNICODE_LITERAL
#  define QT_UNICODE_LITERAL(str) QT_UNICODE_LITERAL_II(str)
# if defined(Q_COMPILER_LAMBDA)

#  define QStringLiteral(str) \
    ([]() -> QString { \
        enum { Size = sizeof(QT_UNICODE_LITERAL(str))/2 - 1 }; \
        static const QStaticStringData<Size> qstring_literal = { \
            Q_STATIC_STRING_DATA_HEADER_INITIALIZER(Size), \
            QT_UNICODE_LITERAL(str) }; \
        QStringDataPtr holder = { qstring_literal.data_ptr() }; \
        const QString s(holder); \
        return s; \
    }()) \
    /**/

# endif
#endif // QT_NO_UNICODE_LITERAL

#ifndef QStringLiteral
// no lambdas, not GCC, or GCC in C++98 mode with 4-byte wchar_t
// fallback, return a temporary QString
// source code is assumed to be encoded in UTF-8

# define QStringLiteral(str) QString::fromUtf8("" str "", sizeof(str) - 1)
#endif

#define Q_STATIC_STRING_DATA_HEADER_INITIALIZER_WITH_OFFSET(size, offset) \
    { Q_REFCOUNT_INITIALIZE_STATIC, size, 0, 0, offset } \
    /**/

#define Q_STATIC_STRING_DATA_HEADER_INITIALIZER(size) \
    Q_STATIC_STRING_DATA_HEADER_INITIALIZER_WITH_OFFSET(size, sizeof(QStringData)) \
    /**/

template <int N>
struct QStaticStringData
{
    QArrayData str;
    qunicodechar data[N + 1];

    QStringData *data_ptr() const
    {
        Q_ASSERT(str.ref.isStatic());
        return const_cast<QStringData *>(static_cast<const QStringData*>(&str));
    }
};

struct QStringDataPtr
{
    QStringData *ptr;
};

class Q_CORE_EXPORT QString
{
public:
    typedef QStringData Data;

    inline QString();
    explicit QString(const QChar *unicode, int size = -1);
    QString(QChar c);
    QString(int size, QChar c);
    inline QString(QLatin1String latin1);
    inline QString(const QString &);
    inline ~QString();
    QString &operator=(QChar c);
    QString &operator=(const QString &);
    inline QString &operator=(QLatin1String latin1);
#ifdef Q_COMPILER_RVALUE_REFS
    inline QString(QString && other) : d(other.d) { other.d = Data::sharedNull(); }
    inline QString &operator=(QString &&other)
    { qSwap(d, other.d); return *this; }
#endif
    inline void swap(QString &other) { qSwap(d, other.d); }
    inline int size() const { return d->size; }
    inline int count() const { return d->size; }
    inline int length() const;
    inline bool isEmpty() const;
    void resize(int size);

    QString &fill(QChar c, int size = -1);
    void truncate(int pos);
    void chop(int n);

    int capacity() const;
    inline void reserve(int size);
    inline void squeeze();

    inline const QChar *unicode() const;
    inline QChar *data();
    inline const QChar *data() const;
    inline const QChar *constData() const;

    inline void detach();
    inline bool isDetached() const;
    inline bool isSharedWith(const QString &other) const { return d == other.d; }
    void clear();

    inline const QChar at(int i) const;
    const QChar operator[](int i) const;
    QCharRef operator[](int i);
    const QChar operator[](uint i) const;
    QCharRef operator[](uint i);

    QString arg(qlonglong a, int fieldwidth=0, int base=10,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(qulonglong a, int fieldwidth=0, int base=10,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(long a, int fieldwidth=0, int base=10,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(ulong a, int fieldwidth=0, int base=10,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(int a, int fieldWidth = 0, int base = 10,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(uint a, int fieldWidth = 0, int base = 10,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(short a, int fieldWidth = 0, int base = 10,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(ushort a, int fieldWidth = 0, int base = 10,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(double a, int fieldWidth = 0, char fmt = 'g', int prec = -1,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(char a, int fieldWidth = 0,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(QChar a, int fieldWidth = 0,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(const QString &a, int fieldWidth = 0,
                QChar fillChar = QLatin1Char(' ')) const Q_REQUIRED_RESULT;
    QString arg(const QString &a1, const QString &a2) const Q_REQUIRED_RESULT;
    QString arg(const QString &a1, const QString &a2, const QString &a3) const Q_REQUIRED_RESULT;
    QString arg(const QString &a1, const QString &a2, const QString &a3,
                const QString &a4) const Q_REQUIRED_RESULT;
    QString arg(const QString &a1, const QString &a2, const QString &a3,
                const QString &a4, const QString &a5) const Q_REQUIRED_RESULT;
    QString arg(const QString &a1, const QString &a2, const QString &a3,
                const QString &a4, const QString &a5, const QString &a6) const Q_REQUIRED_RESULT;
    QString arg(const QString &a1, const QString &a2, const QString &a3,
                const QString &a4, const QString &a5, const QString &a6,
                const QString &a7) const Q_REQUIRED_RESULT;
    QString arg(const QString &a1, const QString &a2, const QString &a3,
                const QString &a4, const QString &a5, const QString &a6,
                const QString &a7, const QString &a8) const Q_REQUIRED_RESULT;
    QString arg(const QString &a1, const QString &a2, const QString &a3,
                const QString &a4, const QString &a5, const QString &a6,
                const QString &a7, const QString &a8, const QString &a9) const Q_REQUIRED_RESULT;

    QString    &vsprintf(const char *format, va_list ap)
#if defined(Q_CC_GNU) && !defined(__INSURE__)
        __attribute__ ((format (printf, 2, 0)))
#endif
        ;
    QString    &sprintf(const char *format, ...)
#if defined(Q_CC_GNU) && !defined(__INSURE__)
        __attribute__ ((format (printf, 2, 3)))
#endif
        ;

    int indexOf(QChar c, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int indexOf(const QString &s, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int indexOf(QLatin1String s, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int indexOf(const QStringRef &s, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int lastIndexOf(QChar c, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int lastIndexOf(const QString &s, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int lastIndexOf(QLatin1String s, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int lastIndexOf(const QStringRef &s, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;

    inline bool contains(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    inline bool contains(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    inline bool contains(const QStringRef &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int count(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int count(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int count(const QStringRef &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;

#ifndef QT_NO_REGEXP
    int indexOf(const QRegExp &, int from = 0) const;
    int lastIndexOf(const QRegExp &, int from = -1) const;
    inline bool contains(const QRegExp &rx) const { return indexOf(rx) != -1; }
    int count(const QRegExp &) const;

    int indexOf(QRegExp &, int from = 0) const;
    int lastIndexOf(QRegExp &, int from = -1) const;
    inline bool contains(QRegExp &rx) const { return indexOf(rx) != -1; }
#endif

#ifndef QT_NO_REGEXP
    int indexOf(const QRegularExpression &re, int from = 0) const;
    int lastIndexOf(const QRegularExpression &re, int from = -1) const;
    bool contains(const QRegularExpression &re) const;
    int count(const QRegularExpression &re) const;
#endif

    enum SectionFlag {
        SectionDefault             = 0x00,
        SectionSkipEmpty           = 0x01,
        SectionIncludeLeadingSep   = 0x02,
        SectionIncludeTrailingSep  = 0x04,
        SectionCaseInsensitiveSeps = 0x08
    };
    Q_DECLARE_FLAGS(SectionFlags, SectionFlag)

    QString section(QChar sep, int start, int end = -1, SectionFlags flags = SectionDefault) const;
    QString section(const QString &in_sep, int start, int end = -1, SectionFlags flags = SectionDefault) const;
#ifndef QT_NO_REGEXP
    QString section(const QRegExp &reg, int start, int end = -1, SectionFlags flags = SectionDefault) const;
#endif
#ifndef QT_NO_REGEXP
    QString section(const QRegularExpression &re, int start, int end = -1, SectionFlags flags = SectionDefault) const;
#endif
    QString left(int n) const Q_REQUIRED_RESULT;
    QString right(int n) const Q_REQUIRED_RESULT;
    QString mid(int position, int n = -1) const Q_REQUIRED_RESULT;
    QStringRef leftRef(int n) const Q_REQUIRED_RESULT;
    QStringRef rightRef(int n) const Q_REQUIRED_RESULT;
    QStringRef midRef(int position, int n = -1) const Q_REQUIRED_RESULT;

    bool startsWith(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool startsWith(const QStringRef &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool startsWith(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool startsWith(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool endsWith(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool endsWith(const QStringRef &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool endsWith(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool endsWith(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;

    QString leftJustified(int width, QChar fill = QLatin1Char(' '), bool trunc = false) const Q_REQUIRED_RESULT;
    QString rightJustified(int width, QChar fill = QLatin1Char(' '), bool trunc = false) const Q_REQUIRED_RESULT;

    QString toLower() const Q_REQUIRED_RESULT;
    QString toUpper() const Q_REQUIRED_RESULT;
    QString toCaseFolded() const Q_REQUIRED_RESULT;

    QString trimmed() const Q_REQUIRED_RESULT;
    QString simplified() const Q_REQUIRED_RESULT;
    QString toHtmlEscaped() const Q_REQUIRED_RESULT;

    QString &insert(int i, QChar c);
    QString &insert(int i, const QChar *uc, int len);
    inline QString &insert(int i, const QString &s) { return insert(i, s.constData(), s.length()); }
    QString &insert(int i, QLatin1String s);
    QString &append(QChar c);
    QString &append(const QChar *uc, int len);
    QString &append(const QString &s);
    QString &append(const QStringRef &s);
    QString &append(QLatin1String s);
    inline QString &prepend(QChar c) { return insert(0, c); }
    inline QString &prepend(const QString &s) { return insert(0, s); }
    inline QString &prepend(QLatin1String s) { return insert(0, s); }

    inline QString &operator+=(QChar c) {
        if (d->ref.isShared() || uint(d->size) + 2u > d->alloc)
            reallocData(uint(d->size) + 2u, true);
        d->data()[d->size++] = c.unicode();
        d->data()[d->size] = '\0';
        return *this;
    }

    inline QString &operator+=(QChar::SpecialCharacter c) { return append(QChar(c)); }
    inline QString &operator+=(const QString &s) { return append(s); }
    inline QString &operator+=(const QStringRef &s) { return append(s); }
    inline QString &operator+=(QLatin1String s) { return append(s); }

    QString &remove(int i, int len);
    QString &remove(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive);
    QString &remove(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive);
    QString &replace(int i, int len, QChar after);
    QString &replace(int i, int len, const QChar *s, int slen);
    QString &replace(int i, int len, const QString &after);
    QString &replace(QChar before, QChar after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
    QString &replace(const QChar *before, int blen, const QChar *after, int alen, Qt::CaseSensitivity cs = Qt::CaseSensitive);
    QString &replace(QLatin1String before, QLatin1String after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
    QString &replace(QLatin1String before, const QString &after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
    QString &replace(const QString &before, QLatin1String after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
    QString &replace(const QString &before, const QString &after,
                     Qt::CaseSensitivity cs = Qt::CaseSensitive);
    QString &replace(QChar c, const QString &after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
    QString &replace(QChar c, QLatin1String after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
#ifndef QT_NO_REGEXP
    QString &replace(const QRegExp &rx, const QString &after);
    inline QString &remove(const QRegExp &rx)
    { return replace(rx, QString()); }
#endif
#ifndef QT_NO_REGEXP
    QString &replace(const QRegularExpression &re, const QString  &after);
    inline QString &remove(const QRegularExpression &re)
    { return replace(re, QString()); }
#endif

    enum SplitBehavior { KeepEmptyParts, SkipEmptyParts };

    QStringList split(const QString &sep, SplitBehavior behavior = KeepEmptyParts,
                      Qt::CaseSensitivity cs = Qt::CaseSensitive) const Q_REQUIRED_RESULT;
    QStringList split(QChar sep, SplitBehavior behavior = KeepEmptyParts,
                      Qt::CaseSensitivity cs = Qt::CaseSensitive) const Q_REQUIRED_RESULT;
#ifndef QT_NO_REGEXP
    QStringList split(const QRegExp &sep, SplitBehavior behavior = KeepEmptyParts) const Q_REQUIRED_RESULT;
#endif
#ifndef QT_NO_REGEXP
    QStringList split(const QRegularExpression &sep, SplitBehavior behavior = KeepEmptyParts) const Q_REQUIRED_RESULT;
#endif
    enum NormalizationForm {
        NormalizationForm_D,
        NormalizationForm_C,
        NormalizationForm_KD,
        NormalizationForm_KC
    };
    QString normalized(NormalizationForm mode, QChar::UnicodeVersion version = QChar::Unicode_Unassigned) const Q_REQUIRED_RESULT;

    QString repeated(int times) const;

    const ushort *utf16() const;

    QByteArray toLatin1() const Q_REQUIRED_RESULT;
    QByteArray toUtf8() const Q_REQUIRED_RESULT;
    QByteArray toLocal8Bit() const Q_REQUIRED_RESULT;
    QVector<uint> toUcs4() const Q_REQUIRED_RESULT;

    // note - this are all inline so we can benefit from strlen() compile time optimizations
    static inline QString fromLatin1(const char *str, int size = -1)
    {
        QStringDataPtr dataPtr = { fromLatin1_helper(str, (str && size == -1) ? int(strlen(str)) : size) };
        return QString(dataPtr);
    }
    static inline QString fromUtf8(const char *str, int size = -1)
    {
        return fromUtf8_helper(str, (str && size == -1) ? int(strlen(str)) : size);
    }
    static inline QString fromLocal8Bit(const char *str, int size = -1)
    {
        return fromLocal8Bit_helper(str, (str && size == -1) ? int(strlen(str)) : size);
    }
    static inline QString fromLatin1(const QByteArray &str)
    { return fromLatin1(str.data(), qstrnlen(str.constData(), str.size())); }
    static inline QString fromUtf8(const QByteArray &str)
    { return fromUtf8(str.data(), qstrnlen(str.constData(), str.size())); }
    static inline QString fromLocal8Bit(const QByteArray &str)
    { return fromLocal8Bit(str.data(), qstrnlen(str.constData(), str.size())); }
    static QString fromUtf16(const ushort *, int size = -1);
    static QString fromUcs4(const uint *, int size = -1);
    static QString fromRawData(const QChar *, int size);

#if QT_DEPRECATED_SINCE(5, 0)
    QT_DEPRECATED static inline QString fromAscii(const char *str, int size = -1)
    { return fromLatin1(str, size); }
    QT_DEPRECATED static inline QString fromAscii(const QByteArray &str)
    { return fromLatin1(str); }
    QByteArray toAscii() const Q_REQUIRED_RESULT
    { return toLatin1(); }
#endif

    inline int toWCharArray(wchar_t *array) const;
    static inline QString fromWCharArray(const wchar_t *string, int size = -1) Q_REQUIRED_RESULT;

    QString &setRawData(const QChar *unicode, int size);
    QString &setUnicode(const QChar *unicode, int size);
    inline QString &setUtf16(const ushort *utf16, int size);

    int compare(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int compare(QLatin1String other, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;

    static inline int compare(const QString &s1, const QString &s2, Qt::CaseSensitivity cs = Qt::CaseSensitive)
    { return s1.compare(s2, cs); }

    static inline int compare(const QString &s1, QLatin1String s2,
                              Qt::CaseSensitivity cs = Qt::CaseSensitive)
    { return s1.compare(s2, cs); }
    static inline int compare(QLatin1String s1, const QString &s2,
                              Qt::CaseSensitivity cs = Qt::CaseSensitive)
    { return -s2.compare(s1, cs); }

    int compare(const QStringRef &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    static int compare(const QString &s1, const QStringRef &s2,
                       Qt::CaseSensitivity = Qt::CaseSensitive);

    int localeAwareCompare(const QString& s) const;
    static int localeAwareCompare(const QString& s1, const QString& s2)
    { return s1.localeAwareCompare(s2); }

    int localeAwareCompare(const QStringRef &s) const;
    static int localeAwareCompare(const QString& s1, const QStringRef& s2);

    short  toShort(bool *ok=0, int base=10) const;
    ushort toUShort(bool *ok=0, int base=10) const;
    int toInt(bool *ok=0, int base=10) const;
    uint toUInt(bool *ok=0, int base=10) const;
    long toLong(bool *ok=0, int base=10) const;
    ulong toULong(bool *ok=0, int base=10) const;
    qlonglong toLongLong(bool *ok=0, int base=10) const;
    qulonglong toULongLong(bool *ok=0, int base=10) const;
    float toFloat(bool *ok=0) const;
    double toDouble(bool *ok=0) const;

    QString &setNum(short, int base=10);
    QString &setNum(ushort, int base=10);
    QString &setNum(int, int base=10);
    QString &setNum(uint, int base=10);
    QString &setNum(long, int base=10);
    QString &setNum(ulong, int base=10);
    QString &setNum(qlonglong, int base=10);
    QString &setNum(qulonglong, int base=10);
    QString &setNum(float, char f='g', int prec=6);
    QString &setNum(double, char f='g', int prec=6);

    static QString number(int, int base=10);
    static QString number(uint, int base=10);
    static QString number(long, int base=10);
    static QString number(ulong, int base=10);
    static QString number(qlonglong, int base=10);
    static QString number(qulonglong, int base=10);
    static QString number(double, char f='g', int prec=6);

    friend Q_CORE_EXPORT bool operator==(const QString &s1, const QString &s2);
    friend Q_CORE_EXPORT bool operator<(const QString &s1, const QString &s2);
    friend inline bool operator>(const QString &s1, const QString &s2) { return s2 < s1; }
    friend inline bool operator!=(const QString &s1, const QString &s2) { return !(s1 == s2); }
    friend inline bool operator<=(const QString &s1, const QString &s2) { return !(s1 > s2); }
    friend inline bool operator>=(const QString &s1, const QString &s2) { return !(s1 < s2); }

    bool operator==(QLatin1String s) const;
    bool operator<(QLatin1String s) const;
    bool operator>(QLatin1String s) const;
    inline bool operator!=(QLatin1String s) const { return !operator==(s); }
    inline bool operator<=(QLatin1String s) const { return !operator>(s); }
    inline bool operator>=(QLatin1String s) const { return !operator<(s); }

    // ASCII compatibility
#ifndef QT_NO_CAST_FROM_ASCII
    inline QT_ASCII_CAST_WARN QString(const char *ch)
        : d(fromAscii_helper(ch, ch ? int(strlen(ch)) : -1))
    {}
    inline QT_ASCII_CAST_WARN QString(const QByteArray &a)
        : d(fromAscii_helper(a.constData(), qstrnlen(a.constData(), a.size())))
    {}
    inline QT_ASCII_CAST_WARN QString &operator=(const char *ch)
    { return (*this = fromUtf8(ch)); }
    inline QT_ASCII_CAST_WARN QString &operator=(const QByteArray &a)
    { return (*this = fromUtf8(a)); }
    inline QT_ASCII_CAST_WARN QString &operator=(char c)
    { return (*this = QChar::fromLatin1(c)); }

    // these are needed, so it compiles with STL support enabled
    inline QT_ASCII_CAST_WARN QString &prepend(const char *s)
    { return prepend(QString::fromUtf8(s)); }
    inline QT_ASCII_CAST_WARN QString &prepend(const QByteArray &s)
    { return prepend(QString::fromUtf8(s)); }
    inline QT_ASCII_CAST_WARN QString &append(const char *s)
    { return append(QString::fromUtf8(s)); }
    inline QT_ASCII_CAST_WARN QString &append(const QByteArray &s)
    { return append(QString::fromUtf8(s)); }
    inline QT_ASCII_CAST_WARN QString &operator+=(const char *s)
    { return append(QString::fromUtf8(s)); }
    inline QT_ASCII_CAST_WARN QString &operator+=(const QByteArray &s)
    { return append(QString::fromUtf8(s)); }
    inline QT_ASCII_CAST_WARN QString &operator+=(char c)
    { return append(QChar::fromLatin1(c)); }

    inline QT_ASCII_CAST_WARN bool operator==(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator!=(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator<(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator<=(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator>(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator>=(const char *s) const;

    inline QT_ASCII_CAST_WARN bool operator==(const QByteArray &s) const;
    inline QT_ASCII_CAST_WARN bool operator!=(const QByteArray &s) const;
    inline QT_ASCII_CAST_WARN bool operator<(const QByteArray &s) const;
    inline QT_ASCII_CAST_WARN bool operator>(const QByteArray &s) const;
    inline QT_ASCII_CAST_WARN bool operator<=(const QByteArray &s) const;
    inline QT_ASCII_CAST_WARN bool operator>=(const QByteArray &s) const;

    friend inline QT_ASCII_CAST_WARN bool operator==(const char *s1, const QString &s2);
    friend inline QT_ASCII_CAST_WARN bool operator!=(const char *s1, const QString &s2);
    friend inline QT_ASCII_CAST_WARN bool operator<(const char *s1, const QString &s2);
    friend inline QT_ASCII_CAST_WARN bool operator>(const char *s1, const QString &s2);
    friend inline QT_ASCII_CAST_WARN bool operator<=(const char *s1, const QString &s2);
    friend inline QT_ASCII_CAST_WARN bool operator>=(const char *s1, const QString &s2);

    friend inline QT_ASCII_CAST_WARN bool operator==(const char *s1, const QStringRef &s2);
    friend inline QT_ASCII_CAST_WARN bool operator!=(const char *s1, const QStringRef &s2);
    friend inline QT_ASCII_CAST_WARN bool operator<(const char *s1, const QStringRef &s2);
    friend inline QT_ASCII_CAST_WARN bool operator>(const char *s1, const QStringRef &s2);
    friend inline QT_ASCII_CAST_WARN bool operator<=(const char *s1, const QStringRef &s2);
    friend inline QT_ASCII_CAST_WARN bool operator>=(const char *s1, const QStringRef &s2);
#endif

    typedef QChar *iterator;
    typedef const QChar *const_iterator;
    typedef iterator Iterator;
    typedef const_iterator ConstIterator;
    iterator begin();
    const_iterator begin() const;
    const_iterator cbegin() const;
    const_iterator constBegin() const;
    iterator end();
    const_iterator end() const;
    const_iterator cend() const;
    const_iterator constEnd() const;

    // STL compatibility
    typedef const QChar & const_reference;
    typedef QChar & reference;
    typedef QChar value_type;
    inline void push_back(QChar c) { append(c); }
    inline void push_back(const QString &s) { append(s); }
    inline void push_front(QChar c) { prepend(c); }
    inline void push_front(const QString &s) { prepend(s); }

    static inline QString fromStdString(const std::string &s);
    inline std::string toStdString() const;
    static inline QString fromStdWString(const std::wstring &s);
    inline std::wstring toStdWString() const;

    // compatibility
    struct Null { };
    static const Null null;
    inline QString(const Null &): d(Data::sharedNull()) {}
    inline QString &operator=(const Null &) { *this = QString(); return *this; }
    inline bool isNull() const { return d == Data::sharedNull(); }


    bool isSimpleText() const;
    bool isRightToLeft() const;

    QString(int size, Qt::Initialization);
    Q_DECL_CONSTEXPR inline QString(QStringDataPtr dd) : d(dd.ptr) {}

private:
#if defined(QT_NO_CAST_FROM_ASCII) && !defined(Q_NO_DECLARED_NOT_DEFINED)
    QString &operator+=(const char *s);
    QString &operator+=(const QByteArray &s);
    QString(const char *ch);
    QString(const QByteArray &a);
    QString &operator=(const char  *ch);
    QString &operator=(const QByteArray &a);
#endif

    Data *d;

    void reallocData(uint alloc, bool grow = false);
    void expand(int i);
    void updateProperties() const;
    QString multiArg(int numArgs, const QString **args) const;
    static int compare_helper(const QChar *data1, int length1,
                              const QChar *data2, int length2,
                              Qt::CaseSensitivity cs = Qt::CaseSensitive);
    static int compare_helper(const QChar *data1, int length1,
                              const char *data2, int length2,
                              Qt::CaseSensitivity cs = Qt::CaseSensitive);
    static int compare_helper(const QChar *data1, int length1,
                              QLatin1String s2,
                              Qt::CaseSensitivity cs = Qt::CaseSensitive);
    static int localeAwareCompare_helper(const QChar *data1, int length1,
                                         const QChar *data2, int length2);
    static Data *fromLatin1_helper(const char *str, int size = -1);
    static Data *fromAscii_helper(const char *str, int size = -1);
    static QString fromUtf8_helper(const char *str, int size);
    static QString fromLocal8Bit_helper(const char *, int size);
    static int toUcs4_helper(const ushort *uc, int length, uint *out);
    void replace_helper(uint *indices, int nIndices, int blen, const QChar *after, int alen);
    friend class QCharRef;
    friend class QTextCodec;
    friend class QStringRef;
    friend class QByteArray;
    friend class QCollator;
    friend struct QAbstractConcatenable;

public:
    typedef Data * DataPtr;
    inline DataPtr &data_ptr() { return d; }
};

inline QString::QString(QLatin1String aLatin1) : d(fromLatin1_helper(aLatin1.latin1(), aLatin1.size()))
{ }
inline int QString::length() const
{ return d->size; }
inline const QChar QString::at(int i) const
{ Q_ASSERT(uint(i) < uint(size())); return d->data()[i]; }
inline const QChar QString::operator[](int i) const
{ Q_ASSERT(uint(i) < uint(size())); return d->data()[i]; }
inline const QChar QString::operator[](uint i) const
{ Q_ASSERT(i < uint(size())); return d->data()[i]; }
inline bool QString::isEmpty() const
{ return d->size == 0; }
inline const QChar *QString::unicode() const
{ return reinterpret_cast<const QChar*>(d->data()); }
inline const QChar *QString::data() const
{ return reinterpret_cast<const QChar*>(d->data()); }
inline QChar *QString::data()
{ detach(); return reinterpret_cast<QChar*>(d->data()); }
inline const QChar *QString::constData() const
{ return reinterpret_cast<const QChar*>(d->data()); }
inline void QString::detach()
{ if (d->ref.isShared() || (d->offset != sizeof(QStringData))) reallocData(uint(d->size) + 1u); }
inline bool QString::isDetached() const
{ return !d->ref.isShared(); }
inline QString &QString::operator=(QLatin1String s)
{
    *this = fromLatin1(s.latin1(), s.size());
    return *this;
}
inline void QString::clear()
{ if (!isNull()) *this = QString(); }
inline QString::QString(const QString &other) : d(other.d)
{ Q_ASSERT(&other != this); d->ref.ref(); }
inline int QString::capacity() const
{ return d->alloc ? d->alloc - 1 : 0; }
inline QString &QString::setNum(short n, int base)
{ return setNum(qlonglong(n), base); }
inline QString &QString::setNum(ushort n, int base)
{ return setNum(qulonglong(n), base); }
inline QString &QString::setNum(int n, int base)
{ return setNum(qlonglong(n), base); }
inline QString &QString::setNum(uint n, int base)
{ return setNum(qulonglong(n), base); }
inline QString &QString::setNum(long n, int base)
{ return setNum(qlonglong(n), base); }
inline QString &QString::setNum(ulong n, int base)
{ return setNum(qulonglong(n), base); }
inline QString &QString::setNum(float n, char f, int prec)
{ return setNum(double(n),f,prec); }
inline QString QString::arg(int a, int fieldWidth, int base, QChar fillChar) const
{ return arg(qlonglong(a), fieldWidth, base, fillChar); }
inline QString QString::arg(uint a, int fieldWidth, int base, QChar fillChar) const
{ return arg(qulonglong(a), fieldWidth, base, fillChar); }
inline QString QString::arg(long a, int fieldWidth, int base, QChar fillChar) const
{ return arg(qlonglong(a), fieldWidth, base, fillChar); }
inline QString QString::arg(ulong a, int fieldWidth, int base, QChar fillChar) const
{ return arg(qulonglong(a), fieldWidth, base, fillChar); }
inline QString QString::arg(short a, int fieldWidth, int base, QChar fillChar) const
{ return arg(qlonglong(a), fieldWidth, base, fillChar); }
inline QString QString::arg(ushort a, int fieldWidth, int base, QChar fillChar) const
{ return arg(qulonglong(a), fieldWidth, base, fillChar); }
inline QString QString::arg(const QString &a1, const QString &a2) const
{ const QString *args[2] = { &a1, &a2 }; return multiArg(2, args); }
inline QString QString::arg(const QString &a1, const QString &a2, const QString &a3) const
{ const QString *args[3] = { &a1, &a2, &a3 }; return multiArg(3, args); }
inline QString QString::arg(const QString &a1, const QString &a2, const QString &a3,
                            const QString &a4) const
{ const QString *args[4] = { &a1, &a2, &a3, &a4 }; return multiArg(4, args); }
inline QString QString::arg(const QString &a1, const QString &a2, const QString &a3,
                            const QString &a4, const QString &a5) const
{ const QString *args[5] = { &a1, &a2, &a3, &a4, &a5 }; return multiArg(5, args); }
inline QString QString::arg(const QString &a1, const QString &a2, const QString &a3,
                            const QString &a4, const QString &a5, const QString &a6) const
{ const QString *args[6] = { &a1, &a2, &a3, &a4, &a5, &a6 }; return multiArg(6, args); }
inline QString QString::arg(const QString &a1, const QString &a2, const QString &a3,
                            const QString &a4, const QString &a5, const QString &a6,
                            const QString &a7) const
{ const QString *args[7] = { &a1, &a2, &a3, &a4, &a5, &a6,  &a7 }; return multiArg(7, args); }
inline QString QString::arg(const QString &a1, const QString &a2, const QString &a3,
                            const QString &a4, const QString &a5, const QString &a6,
                            const QString &a7, const QString &a8) const
{ const QString *args[8] = { &a1, &a2, &a3, &a4, &a5, &a6,  &a7, &a8 }; return multiArg(8, args); }
inline QString QString::arg(const QString &a1, const QString &a2, const QString &a3,
                            const QString &a4, const QString &a5, const QString &a6,
                            const QString &a7, const QString &a8, const QString &a9) const
{ const QString *args[9] = { &a1, &a2, &a3, &a4, &a5, &a6,  &a7, &a8, &a9 }; return multiArg(9, args); }

inline QString QString::section(QChar asep, int astart, int aend, SectionFlags aflags) const
{ return section(QString(asep), astart, aend, aflags); }

inline int QString::toWCharArray(wchar_t *array) const
{
    if (sizeof(wchar_t) == sizeof(QChar)) {
        memcpy(array, d->data(), sizeof(QChar) * size());
        return size();
    }
    return toUcs4_helper(d->data(), size(), reinterpret_cast<uint *>(array));
}
inline QString QString::fromWCharArray(const wchar_t *string, int size)
{
    return sizeof(wchar_t) == sizeof(QChar) ? fromUtf16(reinterpret_cast<const ushort *>(string), size)
                                            : fromUcs4(reinterpret_cast<const uint *>(string), size);
}


class Q_CORE_EXPORT QCharRef {
    QString &s;
    int i;
    inline QCharRef(QString &str, int idx)
        : s(str),i(idx) {}
    friend class QString;
public:

    // most QChar operations repeated here

    // all this is not documented: We just say "like QChar" and let it be.
    inline operator QChar() const
    { return i < s.d->size ? s.d->data()[i] : 0; }
    inline QCharRef &operator=(QChar c)
    { if (i >= s.d->size) s.expand(i); else s.detach();
      s.d->data()[i] = c.unicode(); return *this; }

    // An operator= for each QChar cast constructors
#ifndef QT_NO_CAST_FROM_ASCII
    inline QT_ASCII_CAST_WARN QCharRef &operator=(char c)
    { return operator=(QChar::fromLatin1(c)); }
    inline QT_ASCII_CAST_WARN QCharRef &operator=(uchar c)
    { return operator=(QChar::fromLatin1(c)); }
#endif
    inline QCharRef &operator=(const QCharRef &c) { return operator=(QChar(c)); }
    inline QCharRef &operator=(ushort rc) { return operator=(QChar(rc)); }
    inline QCharRef &operator=(short rc) { return operator=(QChar(rc)); }
    inline QCharRef &operator=(uint rc) { return operator=(QChar(rc)); }
    inline QCharRef &operator=(int rc) { return operator=(QChar(rc)); }

    // each function...
    inline bool isNull() const { return QChar(*this).isNull(); }
    inline bool isPrint() const { return QChar(*this).isPrint(); }
    inline bool isPunct() const { return QChar(*this).isPunct(); }
    inline bool isSpace() const { return QChar(*this).isSpace(); }
    inline bool isMark() const { return QChar(*this).isMark(); }
    inline bool isLetter() const { return QChar(*this).isLetter(); }
    inline bool isNumber() const { return QChar(*this).isNumber(); }
    inline bool isLetterOrNumber() { return QChar(*this).isLetterOrNumber(); }
    inline bool isDigit() const { return QChar(*this).isDigit(); }
    inline bool isLower() const { return QChar(*this).isLower(); }
    inline bool isUpper() const { return QChar(*this).isUpper(); }
    inline bool isTitleCase() const { return QChar(*this).isTitleCase(); }

    inline int digitValue() const { return QChar(*this).digitValue(); }
    QChar toLower() const { return QChar(*this).toLower(); }
    QChar toUpper() const { return QChar(*this).toUpper(); }
    QChar toTitleCase () const { return QChar(*this).toTitleCase(); }

    QChar::Category category() const { return QChar(*this).category(); }
    QChar::Direction direction() const { return QChar(*this).direction(); }
    QChar::Joining joining() const { return QChar(*this).joining(); }
    bool hasMirrored() const { return QChar(*this).hasMirrored(); }
    QChar mirroredChar() const { return QChar(*this).mirroredChar(); }
    QString decomposition() const { return QChar(*this).decomposition(); }
    QChar::Decomposition decompositionTag() const { return QChar(*this).decompositionTag(); }
    uchar combiningClass() const { return QChar(*this).combiningClass(); }

    QChar::UnicodeVersion unicodeVersion() const { return QChar(*this).unicodeVersion(); }

    inline uchar cell() const { return QChar(*this).cell(); }
    inline uchar row() const { return QChar(*this).row(); }
    inline void setCell(uchar cell);
    inline void setRow(uchar row);

#if QT_DEPRECATED_SINCE(5, 0)
    QT_DEPRECATED  char toAscii() const { return QChar(*this).toLatin1(); }
#endif
    char toLatin1() const { return QChar(*this).toLatin1(); }
    ushort unicode() const { return QChar(*this).unicode(); }
    ushort& unicode() { return s.data()[i].unicode(); }

};
Q_DECLARE_TYPEINFO(QCharRef, Q_MOVABLE_TYPE);

inline void QCharRef::setRow(uchar arow) { QChar(*this).setRow(arow); }
inline void QCharRef::setCell(uchar acell) { QChar(*this).setCell(acell); }


inline QString::QString() : d(Data::sharedNull()) {}
inline QString::~QString() { if (!d->ref.deref()) Data::deallocate(d); }

inline void QString::reserve(int asize)
{
    if (d->ref.isShared() || uint(asize) + 1u > d->alloc)
        reallocData(uint(asize) + 1u);

    if (!d->capacityReserved) {
        // cannot set unconditionally, since d could be the shared_null/shared_empty (which is const)
        d->capacityReserved = true;
    }
}

inline void QString::squeeze()
{
    if (d->ref.isShared() || uint(d->size) + 1u < d->alloc)
        reallocData(uint(d->size) + 1u);

    if (d->capacityReserved) {
        // cannot set unconditionally, since d could be shared_null or
        // otherwise static.
        d->capacityReserved = false;
    }
}

inline QString &QString::setUtf16(const ushort *autf16, int asize)
{ return setUnicode(reinterpret_cast<const QChar *>(autf16), asize); }
inline QCharRef QString::operator[](int i)
{ Q_ASSERT(i >= 0); return QCharRef(*this, i); }
inline QCharRef QString::operator[](uint i)
{ return QCharRef(*this, i); }
inline QString::iterator QString::begin()
{ detach(); return reinterpret_cast<QChar*>(d->data()); }
inline QString::const_iterator QString::begin() const
{ return reinterpret_cast<const QChar*>(d->data()); }
inline QString::const_iterator QString::cbegin() const
{ return reinterpret_cast<const QChar*>(d->data()); }
inline QString::const_iterator QString::constBegin() const
{ return reinterpret_cast<const QChar*>(d->data()); }
inline QString::iterator QString::end()
{ detach(); return reinterpret_cast<QChar*>(d->data() + d->size); }
inline QString::const_iterator QString::end() const
{ return reinterpret_cast<const QChar*>(d->data() + d->size); }
inline QString::const_iterator QString::cend() const
{ return reinterpret_cast<const QChar*>(d->data() + d->size); }
inline QString::const_iterator QString::constEnd() const
{ return reinterpret_cast<const QChar*>(d->data() + d->size); }
inline bool QString::contains(const QString &s, Qt::CaseSensitivity cs) const
{ return indexOf(s, 0, cs) != -1; }
inline bool QString::contains(const QStringRef &s, Qt::CaseSensitivity cs) const
{ return indexOf(s, 0, cs) != -1; }
inline bool QString::contains(QChar c, Qt::CaseSensitivity cs) const
{ return indexOf(c, 0, cs) != -1; }


inline bool operator==(QString::Null, QString::Null) { return true; }
inline bool operator==(QString::Null, const QString &s) { return s.isNull(); }
inline bool operator==(const QString &s, QString::Null) { return s.isNull(); }
inline bool operator!=(QString::Null, QString::Null) { return false; }
inline bool operator!=(QString::Null, const QString &s) { return !s.isNull(); }
inline bool operator!=(const QString &s, QString::Null) { return !s.isNull(); }

inline bool operator==(QLatin1String s1, QLatin1String s2)
{ return (s1.size() == s2.size() && !memcmp(s1.latin1(), s2.latin1(), s1.size())); }
inline bool operator!=(QLatin1String s1, QLatin1String s2)
{ return (s1.size() != s2.size() || memcmp(s1.latin1(), s2.latin1(), s1.size())); }
inline bool operator<(QLatin1String s1, QLatin1String s2)
{ int r = memcmp(s1.latin1(), s2.latin1(), qMin(s1.size(), s2.size()));
  return (r < 0) || (r == 0 && s1.size() < s2.size()); }
inline bool operator<=(QLatin1String s1, QLatin1String s2)
{ int r = memcmp(s1.latin1(), s2.latin1(), qMin(s1.size(), s2.size()));
  return (r < 0) || (r == 0 && s1.size() <= s2.size()); }
inline bool operator>(QLatin1String s1, QLatin1String s2)
{ int r = memcmp(s1.latin1(), s2.latin1(), qMin(s1.size(), s2.size()));
  return (r > 0) || (r == 0 && s1.size() > s2.size()); }
inline bool operator>=(QLatin1String s1, QLatin1String s2)
{ int r = memcmp(s1.latin1(), s2.latin1(), qMin(s1.size(), s2.size()));
  return (r > 0) || (r == 0 && s1.size() >= s2.size()); }

inline bool QLatin1String::operator==(const QString &s) const
{ return s == *this; }
inline bool QLatin1String::operator!=(const QString &s) const
{ return s != *this; }
inline bool QLatin1String::operator>(const QString &s) const
{ return s < *this; }
inline bool QLatin1String::operator<(const QString &s) const
{ return s > *this; }
inline bool QLatin1String::operator>=(const QString &s) const
{ return s <= *this; }
inline bool QLatin1String::operator<=(const QString &s) const
{ return s >= *this; }

#ifndef QT_NO_CAST_FROM_ASCII
inline bool QString::operator==(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) == 0; }
inline bool QString::operator!=(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) != 0; }
inline bool QString::operator<(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) < 0; }
inline bool QString::operator>(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) > 0; }
inline bool QString::operator<=(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) <= 0; }
inline bool QString::operator>=(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) >= 0; }

inline QT_ASCII_CAST_WARN bool operator==(const char *s1, const QString &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) == 0; }
inline QT_ASCII_CAST_WARN bool operator!=(const char *s1, const QString &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) != 0; }
inline QT_ASCII_CAST_WARN bool operator<(const char *s1, const QString &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) < 0; }
inline QT_ASCII_CAST_WARN bool operator>(const char *s1, const QString &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) > 0; }
inline QT_ASCII_CAST_WARN bool operator<=(const char *s1, const QString &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) <= 0; }
inline QT_ASCII_CAST_WARN bool operator>=(const char *s1, const QString &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) >= 0; }

inline QT_ASCII_CAST_WARN bool operator==(const char *s1, QLatin1String s2)
{ return QString::fromUtf8(s1) == s2; }
inline QT_ASCII_CAST_WARN bool operator!=(const char *s1, QLatin1String s2)
{ return QString::fromUtf8(s1) != s2; }
inline QT_ASCII_CAST_WARN bool operator<(const char *s1, QLatin1String s2)
{ return (QString::fromUtf8(s1) < s2); }
inline QT_ASCII_CAST_WARN bool operator>(const char *s1, QLatin1String s2)
{ return (QString::fromUtf8(s1) > s2); }
inline QT_ASCII_CAST_WARN bool operator<=(const char *s1, QLatin1String s2)
{ return (QString::fromUtf8(s1) <= s2); }
inline QT_ASCII_CAST_WARN bool operator>=(const char *s1, QLatin1String s2)
{ return (QString::fromUtf8(s1) >= s2); }

inline QT_ASCII_CAST_WARN bool QLatin1String::operator==(const char *s) const
{ return QString::fromUtf8(s) == *this; }
inline QT_ASCII_CAST_WARN bool QLatin1String::operator!=(const char *s) const
{ return QString::fromUtf8(s) != *this; }
inline QT_ASCII_CAST_WARN bool QLatin1String::operator<(const char *s) const
{ return QString::fromUtf8(s) > *this; }
inline QT_ASCII_CAST_WARN bool QLatin1String::operator>(const char *s) const
{ return QString::fromUtf8(s) < *this; }
inline QT_ASCII_CAST_WARN bool QLatin1String::operator<=(const char *s) const
{ return QString::fromUtf8(s) >= *this; }
inline QT_ASCII_CAST_WARN bool QLatin1String::operator>=(const char *s) const
{ return QString::fromUtf8(s) <= *this; }

inline QT_ASCII_CAST_WARN bool QLatin1String::operator==(const QByteArray &s) const
{ return QString::fromUtf8(s) == *this; }
inline QT_ASCII_CAST_WARN bool QLatin1String::operator!=(const QByteArray &s) const
{ return QString::fromUtf8(s) != *this; }
inline QT_ASCII_CAST_WARN bool QLatin1String::operator<(const QByteArray &s) const
{ return QString::fromUtf8(s) > *this; }
inline QT_ASCII_CAST_WARN bool QLatin1String::operator>(const QByteArray &s) const
{ return QString::fromUtf8(s) < *this; }
inline QT_ASCII_CAST_WARN bool QLatin1String::operator<=(const QByteArray &s) const
{ return QString::fromUtf8(s) >= *this; }
inline QT_ASCII_CAST_WARN bool QLatin1String::operator>=(const QByteArray &s) const
{ return QString::fromUtf8(s) <= *this; }

inline QT_ASCII_CAST_WARN bool QString::operator==(const QByteArray &s) const
{ return QString::compare_helper(constData(), size(), s.constData(), qstrnlen(s.constData(), s.size())) == 0; }
inline QT_ASCII_CAST_WARN bool QString::operator!=(const QByteArray &s) const
{ return QString::compare_helper(constData(), size(), s.constData(), qstrnlen(s.constData(), s.size())) != 0; }
inline QT_ASCII_CAST_WARN bool QString::operator<(const QByteArray &s) const
{ return QString::compare_helper(constData(), size(), s.constData(), qstrnlen(s.constData(), s.size())) < 0; }
inline QT_ASCII_CAST_WARN bool QString::operator>(const QByteArray &s) const
{ return QString::compare_helper(constData(), size(), s.constData(), qstrnlen(s.constData(), s.size())) > 0; }
inline QT_ASCII_CAST_WARN bool QString::operator<=(const QByteArray &s) const
{ return QString::compare_helper(constData(), size(), s.constData(), qstrnlen(s.constData(), s.size())) <= 0; }
inline QT_ASCII_CAST_WARN bool QString::operator>=(const QByteArray &s) const
{ return QString::compare_helper(constData(), size(), s.constData(), qstrnlen(s.constData(), s.size())) >= 0; }

inline bool QByteArray::operator==(const QString &s) const
{ return QString::compare_helper(s.constData(), s.size(), constData(), qstrnlen(constData(), size())) == 0; }
inline bool QByteArray::operator!=(const QString &s) const
{ return QString::compare_helper(s.constData(), s.size(), constData(), qstrnlen(constData(), size())) != 0; }
inline bool QByteArray::operator<(const QString &s) const
{ return QString::compare_helper(s.constData(), s.size(), constData(), qstrnlen(constData(), size())) < 0; }
inline bool QByteArray::operator>(const QString &s) const
{ return QString::compare_helper(s.constData(), s.size(), constData(), qstrnlen(constData(), size())) > 0; }
inline bool QByteArray::operator<=(const QString &s) const
{ return QString::compare_helper(s.constData(), s.size(), constData(), qstrnlen(constData(), size())) <= 0; }
inline bool QByteArray::operator>=(const QString &s) const
{ return QString::compare_helper(s.constData(), s.size(), constData(), qstrnlen(constData(), size())) >= 0; }
#endif   // QT_NO_CAST_FROM_ASCII

#ifndef QT_NO_CAST_TO_ASCII
inline QByteArray &QByteArray::append(const QString &s)
{ return append(s.toUtf8()); }
inline QByteArray &QByteArray::insert(int i, const QString &s)
{ return insert(i, s.toUtf8()); }
inline QByteArray &QByteArray::replace(char c, const QString &after)
{ return replace(c, after.toUtf8()); }
inline QByteArray &QByteArray::replace(const QString &before, const char *after)
{ return replace(before.toUtf8(), after); }
inline QByteArray &QByteArray::replace(const QString &before, const QByteArray &after)
{ return replace(before.toUtf8(), after); }
inline QByteArray &QByteArray::operator+=(const QString &s)
{ return operator+=(s.toUtf8()); }
inline int QByteArray::indexOf(const QString &s, int from) const
{ return indexOf(s.toUtf8(), from); }
inline int QByteArray::lastIndexOf(const QString &s, int from) const
{ return lastIndexOf(s.toUtf8(), from); }
#endif // QT_NO_CAST_TO_ASCII

#if !defined(QT_USE_FAST_OPERATOR_PLUS) && !defined(QT_USE_QSTRINGBUILDER)
inline const QString operator+(const QString &s1, const QString &s2)
{ QString t(s1); t += s2; return t; }
inline const QString operator+(const QString &s1, QChar s2)
{ QString t(s1); t += s2; return t; }
inline const QString operator+(QChar s1, const QString &s2)
{ QString t(s1); t += s2; return t; }
#  ifndef QT_NO_CAST_FROM_ASCII
inline QT_ASCII_CAST_WARN const QString operator+(const QString &s1, const char *s2)
{ QString t(s1); t += QString::fromUtf8(s2); return t; }
inline QT_ASCII_CAST_WARN const QString operator+(const char *s1, const QString &s2)
{ QString t = QString::fromUtf8(s1); t += s2; return t; }
inline QT_ASCII_CAST_WARN const QString operator+(char c, const QString &s)
{ QString t = s; t.prepend(QChar::fromLatin1(c)); return t; }
inline QT_ASCII_CAST_WARN const QString operator+(const QString &s, char c)
{ QString t = s; t += QChar::fromLatin1(c); return t; }
inline QT_ASCII_CAST_WARN const QString operator+(const QByteArray &ba, const QString &s)
{ QString t = QString::fromUtf8(ba); t += s; return t; }
inline QT_ASCII_CAST_WARN const QString operator+(const QString &s, const QByteArray &ba)
{ QString t(s); t += QString::fromUtf8(ba); return t; }
#  endif // QT_NO_CAST_FROM_ASCII
#endif // QT_USE_QSTRINGBUILDER

inline std::string QString::toStdString() const
{ const QByteArray asc = toUtf8(); return std::string(asc.constData(), asc.length()); }

inline QString QString::fromStdString(const std::string &s)
{ return fromUtf8(s.data(), int(s.size())); }

inline std::wstring QString::toStdWString() const
{
    std::wstring str;
    str.resize(length());

#if defined(_MSC_VER) && _MSC_VER >= 1400
    // VS2005 crashes if the string is empty
    if (!length())
        return str;
#endif

    str.resize(toWCharArray(&(*str.begin())));
    return str;
}

inline QString QString::fromStdWString(const std::wstring &s)
{ return fromWCharArray(s.data(), int(s.size())); }

#if !defined(QT_NO_DATASTREAM) || (defined(QT_BOOTSTRAPPED) && !defined(QT_BUILD_QMAKE))
Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QString &);
Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QString &);
#endif

Q_DECLARE_SHARED(QString)
Q_DECLARE_OPERATORS_FOR_FLAGS(QString::SectionFlags)


class Q_CORE_EXPORT QStringRef {
    const QString *m_string;
    int m_position;
    int m_size;
public:
    inline QStringRef():m_string(0), m_position(0), m_size(0){}
    inline QStringRef(const QString *string, int position, int size);
    inline QStringRef(const QString *string);
    inline QStringRef(const QStringRef &other)
        :m_string(other.m_string), m_position(other.m_position), m_size(other.m_size)
        {}

    inline ~QStringRef(){}
    inline const QString *string() const { return m_string; }
    inline int position() const { return m_position; }
    inline int size() const { return m_size; }
    inline int count() const { return m_size; }
    inline int length() const { return m_size; }

    inline QStringRef &operator=(const QStringRef &other) {
        m_string = other.m_string; m_position = other.m_position;
        m_size = other.m_size; return *this;
    }

    int indexOf(const QString &str, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int indexOf(QChar ch, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int indexOf(QLatin1String str, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int indexOf(const QStringRef &str, int from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int lastIndexOf(const QString &str, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int lastIndexOf(QChar ch, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int lastIndexOf(QLatin1String str, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int lastIndexOf(const QStringRef &str, int from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;

    inline bool contains(const QString &str, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    inline bool contains(QChar ch, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    inline bool contains(QLatin1String str, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    inline bool contains(const QStringRef &str, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;

    int count(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int count(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int count(const QStringRef &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;

    bool startsWith(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool startsWith(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool startsWith(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool startsWith(const QStringRef &c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;

    bool endsWith(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool endsWith(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool endsWith(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    bool endsWith(const QStringRef &c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;

    inline QStringRef &operator=(const QString *string);

    inline const QChar *unicode() const {
        if (!m_string)
            return reinterpret_cast<const QChar *>(QString::Data::sharedNull()->data());
        return m_string->unicode() + m_position;
    }
    inline const QChar *data() const { return unicode(); }
    inline const QChar *constData() const {  return unicode(); }

#if QT_DEPRECATED_SINCE(5, 0)
    QT_DEPRECATED QByteArray toAscii() const Q_REQUIRED_RESULT
    { return toLatin1(); }
#endif
    QByteArray toLatin1() const Q_REQUIRED_RESULT;
    QByteArray toUtf8() const Q_REQUIRED_RESULT;
    QByteArray toLocal8Bit() const Q_REQUIRED_RESULT;
    QVector<uint> toUcs4() const Q_REQUIRED_RESULT;

    inline void clear() { m_string = 0; m_position = m_size = 0; }
    QString toString() const;
    inline bool isEmpty() const { return m_size == 0; }
    inline bool isNull() const { return m_string == 0 || m_string->isNull(); }

    QStringRef appendTo(QString *string) const;

    inline const QChar at(int i) const
        { Q_ASSERT(uint(i) < uint(size())); return m_string->at(i + m_position); }

#ifndef QT_NO_CAST_FROM_ASCII
    // ASCII compatibility
    inline QT_ASCII_CAST_WARN bool operator==(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator!=(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator<(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator<=(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator>(const char *s) const;
    inline QT_ASCII_CAST_WARN bool operator>=(const char *s) const;
#endif

    int compare(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int compare(const QStringRef &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    int compare(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
    static int compare(const QStringRef &s1, const QString &s2,
                       Qt::CaseSensitivity = Qt::CaseSensitive);
    static int compare(const QStringRef &s1, const QStringRef &s2,
                       Qt::CaseSensitivity = Qt::CaseSensitive);
    static int compare(const QStringRef &s1, QLatin1String s2,
                       Qt::CaseSensitivity cs = Qt::CaseSensitive);

    int localeAwareCompare(const QString &s) const;
    int localeAwareCompare(const QStringRef &s) const;
    static int localeAwareCompare(const QStringRef &s1, const QString &s2);
    static int localeAwareCompare(const QStringRef &s1, const QStringRef &s2);
};
Q_DECLARE_TYPEINFO(QStringRef, Q_PRIMITIVE_TYPE);

inline QStringRef &QStringRef::operator=(const QString *aString)
{ m_string = aString; m_position = 0; m_size = aString?aString->size():0; return *this; }

inline QStringRef::QStringRef(const QString *aString, int aPosition, int aSize)
        :m_string(aString), m_position(aPosition), m_size(aSize){}

inline QStringRef::QStringRef(const QString *aString)
    :m_string(aString), m_position(0), m_size(aString?aString->size() : 0){}

Q_CORE_EXPORT bool operator==(const QStringRef &s1,const QStringRef &s2);
inline bool operator!=(const QStringRef &s1,const QStringRef &s2)
{ return !(s1 == s2); }
Q_CORE_EXPORT bool operator==(const QString &s1,const QStringRef &s2);
inline bool operator!=(const QString &s1,const QStringRef &s2)
{ return !(s1 == s2); }
inline bool operator==(const QStringRef &s1,const QString &s2)
{ return s2 == s1; }
inline bool operator!=(const QStringRef &s1,const QString &s2)
{ return s2 != s1; }
Q_CORE_EXPORT bool operator==(QLatin1String s1, const QStringRef &s2);
inline bool operator!=(QLatin1String s1, const QStringRef &s2)
{ return !(s1 == s2); }
inline bool operator==(const QStringRef &s1, QLatin1String s2)
{ return s2 == s1; }
inline bool operator!=(const QStringRef &s1, QLatin1String s2)
{ return s2 != s1; }

Q_CORE_EXPORT bool operator<(const QStringRef &s1,const QStringRef &s2);
inline bool operator>(const QStringRef &s1, const QStringRef &s2)
{ return s2 < s1; }
inline bool operator<=(const QStringRef &s1, const QStringRef &s2)
{ return !(s1 > s2); }
inline bool operator>=(const QStringRef &s1, const QStringRef &s2)
{ return !(s1 < s2); }

#ifndef QT_NO_CAST_FROM_ASCII
inline QT_ASCII_CAST_WARN bool QStringRef::operator==(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) == 0; }
inline QT_ASCII_CAST_WARN bool QStringRef::operator!=(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) != 0; }
inline QT_ASCII_CAST_WARN bool QStringRef::operator<(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) < 0; }
inline QT_ASCII_CAST_WARN bool QStringRef::operator<=(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) > 0; }
inline QT_ASCII_CAST_WARN bool QStringRef::operator>(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) <= 0; }
inline QT_ASCII_CAST_WARN bool QStringRef::operator>=(const char *s) const
{ return QString::compare_helper(constData(), size(), s, -1) >= 0; }

inline QT_ASCII_CAST_WARN bool operator==(const char *s1, const QStringRef &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) == 0; }
inline QT_ASCII_CAST_WARN bool operator!=(const char *s1, const QStringRef &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) != 0; }
inline QT_ASCII_CAST_WARN bool operator<(const char *s1, const QStringRef &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) < 0; }
inline QT_ASCII_CAST_WARN bool operator<=(const char *s1, const QStringRef &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) > 0; }
inline QT_ASCII_CAST_WARN bool operator>(const char *s1, const QStringRef &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) <= 0; }
inline QT_ASCII_CAST_WARN bool operator>=(const char *s1, const QStringRef &s2)
{ return QString::compare_helper(s2.constData(), s2.size(), s1, -1) >= 0; }
#endif // QT_NO_CAST_FROM_ASCII

inline int QString::compare(const QStringRef &s, Qt::CaseSensitivity cs) const
{ return QString::compare_helper(constData(), length(), s.constData(), s.length(), cs); }
inline int QString::compare(const QString &s1, const QStringRef &s2, Qt::CaseSensitivity cs)
{ return QString::compare_helper(s1.constData(), s1.length(), s2.constData(), s2.length(), cs); }
inline int QStringRef::compare(const QString &s, Qt::CaseSensitivity cs) const
{ return QString::compare_helper(constData(), length(), s.constData(), s.length(), cs); }
inline int QStringRef::compare(const QStringRef &s, Qt::CaseSensitivity cs) const
{ return QString::compare_helper(constData(), length(), s.constData(), s.length(), cs); }
inline int QStringRef::compare(QLatin1String s, Qt::CaseSensitivity cs) const
{ return QString::compare_helper(constData(), length(), s, cs); }
inline int QStringRef::compare(const QStringRef &s1, const QString &s2, Qt::CaseSensitivity cs)
{ return QString::compare_helper(s1.constData(), s1.length(), s2.constData(), s2.length(), cs); }
inline int QStringRef::compare(const QStringRef &s1, const QStringRef &s2, Qt::CaseSensitivity cs)
{ return QString::compare_helper(s1.constData(), s1.length(), s2.constData(), s2.length(), cs); }
inline int QStringRef::compare(const QStringRef &s1, QLatin1String s2, Qt::CaseSensitivity cs)
{ return QString::compare_helper(s1.constData(), s1.length(), s2, cs); }

inline int QString::localeAwareCompare(const QStringRef &s) const
{ return localeAwareCompare_helper(constData(), length(), s.constData(), s.length()); }
inline int QString::localeAwareCompare(const QString& s1, const QStringRef& s2)
{ return localeAwareCompare_helper(s1.constData(), s1.length(), s2.constData(), s2.length()); }
inline int QStringRef::localeAwareCompare(const QString &s) const
{ return QString::localeAwareCompare_helper(constData(), length(), s.constData(), s.length()); }
inline int QStringRef::localeAwareCompare(const QStringRef &s) const
{ return QString::localeAwareCompare_helper(constData(), length(), s.constData(), s.length()); }
inline int QStringRef::localeAwareCompare(const QStringRef &s1, const QString &s2)
{ return QString::localeAwareCompare_helper(s1.constData(), s1.length(), s2.constData(), s2.length()); }
inline int QStringRef::localeAwareCompare(const QStringRef &s1, const QStringRef &s2)
{ return QString::localeAwareCompare_helper(s1.constData(), s1.length(), s2.constData(), s2.length()); }

inline bool QStringRef::contains(const QString &s, Qt::CaseSensitivity cs) const
{ return indexOf(s, 0, cs) != -1; }
inline bool QStringRef::contains(QLatin1String s, Qt::CaseSensitivity cs) const
{ return indexOf(s, 0, cs) != -1; }
inline bool QStringRef::contains(QChar c, Qt::CaseSensitivity cs) const
{ return indexOf(c, 0, cs) != -1; }
inline bool QStringRef::contains(const QStringRef &s, Qt::CaseSensitivity cs) const
{ return indexOf(s, 0, cs) != -1; }

namespace Qt {
#if QT_DEPRECATED_SINCE(5, 0)
QT_DEPRECATED inline QString escape(const QString &plain) {
    return plain.toHtmlEscaped();
}
#endif
}

QT_END_NAMESPACE

QT_END_HEADER

#if defined(QT_USE_FAST_OPERATOR_PLUS) || defined(QT_USE_QSTRINGBUILDER)
#include <QtCore/qstringbuilder.h>
#endif

#endif // QSTRING_H