1/****************************************************************************
2**
3** Copyright (C) 2020 The Qt Company Ltd.
4** Copyright (C) 2019 Intel Corporation.
5** Copyright (C) 2019 Mail.ru Group.
6** Copyright (C) 2020 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@kdab.com>
7** Contact: https://www.qt.io/licensing/
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41****************************************************************************/
42
43#ifndef QSTRING_H
44#define QSTRING_H
45
46#if defined(QT_NO_CAST_FROM_ASCII) && defined(QT_RESTRICTED_CAST_FROM_ASCII)
47#error QT_NO_CAST_FROM_ASCII and QT_RESTRICTED_CAST_FROM_ASCII must not be defined at the same time
48#endif
49
50#include <QtCore/qchar.h>
51#include <QtCore/qbytearray.h>
52#include <QtCore/qarraydata.h>
53#include <QtCore/qnamespace.h>
54#include <QtCore/qstringliteral.h>
55#include <QtCore/qstringalgorithms.h>
56#include <QtCore/qanystringview.h>
57#include <QtCore/qstringtokenizer.h>
58
59#include <string>
60#include <iterator>
61
62#include <stdarg.h>
63
64#ifdef truncate
65#error qstring.h must be included before any header file that defines truncate
66#endif
67
68#if defined(Q_OS_DARWIN) || defined(Q_QDOC)
69Q_FORWARD_DECLARE_CF_TYPE(CFString);
70Q_FORWARD_DECLARE_OBJC_CLASS(NSString);
71#endif
72
73QT_BEGIN_NAMESPACE
74
75class QRegularExpression;
76class QRegularExpressionMatch;
77class QString;
78
79namespace QtPrivate {
80template <bool...B> class BoolList;
81}
82
83class QLatin1String
84{
85public:
86 constexpr inline QLatin1String() noexcept : m_size(0), m_data(nullptr) {}
87 constexpr inline explicit QLatin1String(const char *s) noexcept : m_size(s ? qsizetype(strlen(s)) : 0), m_data(s) {}
88 constexpr explicit QLatin1String(const char *f, const char *l)
89 : QLatin1String(f, qsizetype(l - f)) {}
90 constexpr inline explicit QLatin1String(const char *s, qsizetype sz) noexcept : m_size(sz), m_data(s) {}
91 explicit QLatin1String(const QByteArray &s) noexcept : m_size(qsizetype(qstrnlen(s.constData(), s.size()))), m_data(s.constData()) {}
92
93 inline QString toString() const;
94
95 constexpr const char *latin1() const noexcept { return m_data; }
96 constexpr qsizetype size() const noexcept { return m_size; }
97 constexpr const char *data() const noexcept { return m_data; }
98
99 constexpr bool isNull() const noexcept { return !data(); }
100 constexpr bool isEmpty() const noexcept { return !size(); }
101
102 template <typename...Args>
103 [[nodiscard]] inline QString arg(Args &&...args) const;
104
105 [[nodiscard]] constexpr QLatin1Char at(qsizetype i) const
106 { return Q_ASSERT(i >= 0), Q_ASSERT(i < size()), QLatin1Char(m_data[i]); }
107 [[nodiscard]] constexpr QLatin1Char operator[](qsizetype i) const { return at(i); }
108
109 [[nodiscard]] constexpr QLatin1Char front() const { return at(0); }
110 [[nodiscard]] constexpr QLatin1Char back() const { return at(size() - 1); }
111
112 [[nodiscard]] int compare(QStringView other, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
113 { return QtPrivate::compareStrings(*this, other, cs); }
114 [[nodiscard]] int compare(QLatin1String other, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
115 { return QtPrivate::compareStrings(*this, other, cs); }
116 [[nodiscard]] constexpr int compare(QChar c) const noexcept
117 { return isEmpty() || front() == c ? size() - 1 : uchar(m_data[0]) - c.unicode() ; }
118 [[nodiscard]] int compare(QChar c, Qt::CaseSensitivity cs) const noexcept
119 { return QtPrivate::compareStrings(*this, QStringView(&c, 1), cs); }
120
121 [[nodiscard]] bool startsWith(QStringView s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
122 { return QtPrivate::startsWith(*this, s, cs); }
123 [[nodiscard]] bool startsWith(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
124 { return QtPrivate::startsWith(*this, s, cs); }
125 [[nodiscard]] constexpr bool startsWith(QChar c) const noexcept
126 { return !isEmpty() && front() == c; }
127 [[nodiscard]] inline bool startsWith(QChar c, Qt::CaseSensitivity cs) const noexcept
128 { return QtPrivate::startsWith(*this, QStringView(&c, 1), cs); }
129
130 [[nodiscard]] bool endsWith(QStringView s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
131 { return QtPrivate::endsWith(*this, s, cs); }
132 [[nodiscard]] bool endsWith(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
133 { return QtPrivate::endsWith(*this, s, cs); }
134 [[nodiscard]] constexpr bool endsWith(QChar c) const noexcept
135 { return !isEmpty() && back() == c; }
136 [[nodiscard]] inline bool endsWith(QChar c, Qt::CaseSensitivity cs) const noexcept
137 { return QtPrivate::endsWith(*this, QStringView(&c, 1), cs); }
138
139 [[nodiscard]] qsizetype indexOf(QStringView s, qsizetype from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
140 { return QtPrivate::findString(*this, from, s, cs); }
141 [[nodiscard]] qsizetype indexOf(QLatin1String s, qsizetype from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
142 { return QtPrivate::findString(*this, from, s, cs); }
143 [[nodiscard]] qsizetype indexOf(QChar c, qsizetype from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
144 { return QtPrivate::findString(*this, from, QStringView(&c, 1), cs); }
145
146 [[nodiscard]] bool contains(QStringView s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
147 { return indexOf(s, 0, cs) != -1; }
148 [[nodiscard]] bool contains(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
149 { return indexOf(s, 0, cs) != -1; }
150 [[nodiscard]] inline bool contains(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
151 { return indexOf(QStringView(&c, 1), 0, cs) != -1; }
152
153 [[nodiscard]] qsizetype lastIndexOf(QStringView s, qsizetype from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
154 { return QtPrivate::lastIndexOf(*this, from, s, cs); }
155 [[nodiscard]] qsizetype lastIndexOf(QLatin1String s, qsizetype from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
156 { return QtPrivate::lastIndexOf(*this, from, s, cs); }
157 [[nodiscard]] qsizetype lastIndexOf(QChar c, qsizetype from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
158 { return QtPrivate::lastIndexOf(*this, from, QStringView(&c, 1), cs); }
159
160 using value_type = const char;
161 using reference = value_type&;
162 using const_reference = reference;
163 using iterator = value_type*;
164 using const_iterator = iterator;
165 using difference_type = qsizetype; // violates Container concept requirements
166 using size_type = qsizetype; // violates Container concept requirements
167
168 constexpr const_iterator begin() const noexcept { return data(); }
169 constexpr const_iterator cbegin() const noexcept { return data(); }
170 constexpr const_iterator end() const noexcept { return data() + size(); }
171 constexpr const_iterator cend() const noexcept { return data() + size(); }
172
173 using reverse_iterator = std::reverse_iterator<iterator>;
174 using const_reverse_iterator = reverse_iterator;
175
176 const_reverse_iterator rbegin() const noexcept { return const_reverse_iterator(end()); }
177 const_reverse_iterator crbegin() const noexcept { return const_reverse_iterator(end()); }
178 const_reverse_iterator rend() const noexcept { return const_reverse_iterator(begin()); }
179 const_reverse_iterator crend() const noexcept { return const_reverse_iterator(begin()); }
180
181 [[nodiscard]] constexpr QLatin1String mid(qsizetype pos, qsizetype n = -1) const
182 {
183 using namespace QtPrivate;
184 auto result = QContainerImplHelper::mid(size(), &pos, &n);
185 return result == QContainerImplHelper::Null ? QLatin1String() : QLatin1String(m_data + pos, n);
186 }
187 [[nodiscard]] constexpr QLatin1String left(qsizetype n) const
188 {
189 if (size_t(n) >= size_t(size()))
190 n = size();
191 return QLatin1String(m_data, n);
192 }
193 [[nodiscard]] constexpr QLatin1String right(qsizetype n) const
194 {
195 if (size_t(n) >= size_t(size()))
196 n = size();
197 return QLatin1String(m_data + m_size - n, n);
198 }
199
200 [[nodiscard]] constexpr QLatin1String sliced(qsizetype pos) const
201 { verify(pos); return QLatin1String(m_data + pos, m_size - pos); }
202 [[nodiscard]] constexpr QLatin1String sliced(qsizetype pos, qsizetype n) const
203 { verify(pos, n); return QLatin1String(m_data + pos, n); }
204 [[nodiscard]] constexpr QLatin1String first(qsizetype n) const
205 { verify(n); return QLatin1String(m_data, n); }
206 [[nodiscard]] constexpr QLatin1String last(qsizetype n) const
207 { verify(n); return QLatin1String(m_data + size() - n, n); }
208 [[nodiscard]] constexpr QLatin1String chopped(qsizetype n) const
209 { verify(n); return QLatin1String(m_data, size() - n); }
210
211 constexpr void chop(qsizetype n)
212 { verify(n); m_size -= n; }
213 constexpr void truncate(qsizetype n)
214 { verify(n); m_size = n; }
215
216 [[nodiscard]] QLatin1String trimmed() const noexcept { return QtPrivate::trimmed(*this); }
217
218 template <typename Needle, typename...Flags>
219 [[nodiscard]] inline constexpr auto tokenize(Needle &&needle, Flags...flags) const
220 noexcept(noexcept(qTokenize(std::declval<const QLatin1String &>(), std::forward<Needle>(needle), flags...)))
221 -> decltype(qTokenize(*this, std::forward<Needle>(needle), flags...))
222 { return qTokenize(*this, std::forward<Needle>(needle), flags...); }
223
224 friend inline bool operator==(QLatin1String s1, QLatin1String s2) noexcept
225 { return s1.size() == s2.size() && (!s1.size() || !memcmp(s1.latin1(), s2.latin1(), s1.size())); }
226 friend inline bool operator!=(QLatin1String s1, QLatin1String s2) noexcept
227 { return !(s1 == s2); }
228 friend inline bool operator<(QLatin1String s1, QLatin1String s2) noexcept
229 {
230 const qsizetype len = qMin(s1.size(), s2.size());
231 const int r = len ? memcmp(s1.latin1(), s2.latin1(), len) : 0;
232 return r < 0 || (r == 0 && s1.size() < s2.size());
233 }
234 friend inline bool operator>(QLatin1String s1, QLatin1String s2) noexcept
235 { return s2 < s1; }
236 friend inline bool operator<=(QLatin1String s1, QLatin1String s2) noexcept
237 { return !(s1 > s2); }
238 friend inline bool operator>=(QLatin1String s1, QLatin1String s2) noexcept
239 { return !(s1 < s2); }
240
241 // QChar <> QLatin1String
242 friend inline bool operator==(QChar lhs, QLatin1String rhs) noexcept { return rhs.size() == 1 && lhs == rhs.front(); }
243 friend inline bool operator< (QChar lhs, QLatin1String rhs) noexcept { return compare_helper(&lhs, 1, rhs) < 0; }
244 friend inline bool operator> (QChar lhs, QLatin1String rhs) noexcept { return compare_helper(&lhs, 1, rhs) > 0; }
245 friend inline bool operator!=(QChar lhs, QLatin1String rhs) noexcept { return !(lhs == rhs); }
246 friend inline bool operator<=(QChar lhs, QLatin1String rhs) noexcept { return !(lhs > rhs); }
247 friend inline bool operator>=(QChar lhs, QLatin1String rhs) noexcept { return !(lhs < rhs); }
248
249 friend inline bool operator==(QLatin1String lhs, QChar rhs) noexcept { return rhs == lhs; }
250 friend inline bool operator!=(QLatin1String lhs, QChar rhs) noexcept { return !(rhs == lhs); }
251 friend inline bool operator< (QLatin1String lhs, QChar rhs) noexcept { return rhs > lhs; }
252 friend inline bool operator> (QLatin1String lhs, QChar rhs) noexcept { return rhs < lhs; }
253 friend inline bool operator<=(QLatin1String lhs, QChar rhs) noexcept { return !(rhs < lhs); }
254 friend inline bool operator>=(QLatin1String lhs, QChar rhs) noexcept { return !(rhs > lhs); }
255
256 // QStringView <> QLatin1String
257 friend inline bool operator==(QStringView lhs, QLatin1String rhs) noexcept
258 { return lhs.size() == rhs.size() && QtPrivate::equalStrings(lhs, rhs); }
259 friend inline bool operator!=(QStringView lhs, QLatin1String rhs) noexcept { return !(lhs == rhs); }
260 friend inline bool operator< (QStringView lhs, QLatin1String rhs) noexcept { return QtPrivate::compareStrings(lhs, rhs) < 0; }
261 friend inline bool operator<=(QStringView lhs, QLatin1String rhs) noexcept { return QtPrivate::compareStrings(lhs, rhs) <= 0; }
262 friend inline bool operator> (QStringView lhs, QLatin1String rhs) noexcept { return QtPrivate::compareStrings(lhs, rhs) > 0; }
263 friend inline bool operator>=(QStringView lhs, QLatin1String rhs) noexcept { return QtPrivate::compareStrings(lhs, rhs) >= 0; }
264
265 friend inline bool operator==(QLatin1String lhs, QStringView rhs) noexcept
266 { return lhs.size() == rhs.size() && QtPrivate::equalStrings(lhs, rhs); }
267 friend inline bool operator!=(QLatin1String lhs, QStringView rhs) noexcept { return !(lhs == rhs); }
268 friend inline bool operator< (QLatin1String lhs, QStringView rhs) noexcept { return QtPrivate::compareStrings(lhs, rhs) < 0; }
269 friend inline bool operator<=(QLatin1String lhs, QStringView rhs) noexcept { return QtPrivate::compareStrings(lhs, rhs) <= 0; }
270 friend inline bool operator> (QLatin1String lhs, QStringView rhs) noexcept { return QtPrivate::compareStrings(lhs, rhs) > 0; }
271 friend inline bool operator>=(QLatin1String lhs, QStringView rhs) noexcept { return QtPrivate::compareStrings(lhs, rhs) >= 0; }
272
273
274#if !defined(QT_NO_CAST_FROM_ASCII) && !defined(QT_RESTRICTED_CAST_FROM_ASCII)
275 QT_ASCII_CAST_WARN inline bool operator==(const char *s) const;
276 QT_ASCII_CAST_WARN inline bool operator!=(const char *s) const;
277 QT_ASCII_CAST_WARN inline bool operator<(const char *s) const;
278 QT_ASCII_CAST_WARN inline bool operator>(const char *s) const;
279 QT_ASCII_CAST_WARN inline bool operator<=(const char *s) const;
280 QT_ASCII_CAST_WARN inline bool operator>=(const char *s) const;
281
282 QT_ASCII_CAST_WARN inline bool operator==(const QByteArray &s) const;
283 QT_ASCII_CAST_WARN inline bool operator!=(const QByteArray &s) const;
284 QT_ASCII_CAST_WARN inline bool operator<(const QByteArray &s) const;
285 QT_ASCII_CAST_WARN inline bool operator>(const QByteArray &s) const;
286 QT_ASCII_CAST_WARN inline bool operator<=(const QByteArray &s) const;
287 QT_ASCII_CAST_WARN inline bool operator>=(const QByteArray &s) const;
288
289 QT_ASCII_CAST_WARN friend bool operator==(const char *s1, QLatin1String s2) { return compare_helper(s2, s1) == 0; }
290 QT_ASCII_CAST_WARN friend bool operator!=(const char *s1, QLatin1String s2) { return compare_helper(s2, s1) != 0; }
291 QT_ASCII_CAST_WARN friend bool operator< (const char *s1, QLatin1String s2) { return compare_helper(s2, s1) > 0; }
292 QT_ASCII_CAST_WARN friend bool operator> (const char *s1, QLatin1String s2) { return compare_helper(s2, s1) < 0; }
293 QT_ASCII_CAST_WARN friend bool operator<=(const char *s1, QLatin1String s2) { return compare_helper(s2, s1) >= 0; }
294 QT_ASCII_CAST_WARN friend bool operator>=(const char *s1, QLatin1String s2) { return compare_helper(s2, s1) <= 0; }
295#endif // !defined(QT_NO_CAST_FROM_ASCII) && !defined(QT_RESTRICTED_CAST_FROM_ASCII)
296
297private:
298#if !defined(QT_NO_CAST_FROM_ASCII) && !defined(QT_RESTRICTED_CAST_FROM_ASCII)
299 static inline int compare_helper(const QLatin1String &s1, const char *s2);
300#endif
301 Q_ALWAYS_INLINE constexpr void verify(qsizetype pos, qsizetype n = 0) const
302 {
303 Q_ASSERT(pos >= 0);
304 Q_ASSERT(pos <= size());
305 Q_ASSERT(n >= 0);
306 Q_ASSERT(n <= size() - pos);
307 }
308 Q_CORE_EXPORT static int compare_helper(const QChar *data1, qsizetype length1,
309 QLatin1String s2,
310 Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
311 qsizetype m_size;
312 const char *m_data;
313};
314Q_DECLARE_TYPEINFO(QLatin1String, Q_RELOCATABLE_TYPE);
315
316// Qt 4.x compatibility
317
318//
319// QLatin1String inline implementations
320//
321constexpr bool QtPrivate::isLatin1(QLatin1String) noexcept
322{ return true; }
323
324//
325// QStringView members that require QLatin1String:
326//
327int QStringView::compare(QLatin1String s, Qt::CaseSensitivity cs) const noexcept
328{ return QtPrivate::compareStrings(*this, s, cs); }
329bool QStringView::startsWith(QLatin1String s, Qt::CaseSensitivity cs) const noexcept
330{ return QtPrivate::startsWith(*this, s, cs); }
331bool QStringView::endsWith(QLatin1String s, Qt::CaseSensitivity cs) const noexcept
332{ return QtPrivate::endsWith(*this, s, cs); }
333qsizetype QStringView::indexOf(QLatin1String s, qsizetype from, Qt::CaseSensitivity cs) const noexcept
334{ return QtPrivate::findString(*this, from, s, cs); }
335bool QStringView::contains(QLatin1String s, Qt::CaseSensitivity cs) const noexcept
336{ return indexOf(s, 0, cs) != qsizetype(-1); }
337qsizetype QStringView::lastIndexOf(QLatin1String s, qsizetype from, Qt::CaseSensitivity cs) const noexcept
338{ return QtPrivate::lastIndexOf(*this, from, s, cs); }
339
340//
341// QAnyStringView members that require QLatin1String
342//
343
344constexpr QAnyStringView::QAnyStringView(QLatin1String str) noexcept
345 : m_data{str.data()}, m_size{size_t(str.size()) | Tag::Latin1} {}
346
347constexpr QLatin1String QAnyStringView::asLatin1StringView() const
348{
349 Q_ASSERT(isLatin1());
350 return QLatin1String{m_data_utf8, int(size())};
351}
352
353template <typename Visitor>
354constexpr decltype(auto) QAnyStringView::visit(Visitor &&v) const
355{
356 if (isUtf16())
357 return std::forward<Visitor>(v)(asStringView());
358 else if (isLatin1())
359 return std::forward<Visitor>(v)(asLatin1StringView());
360 else
361 return std::forward<Visitor>(v)(asUtf8StringView());
362}
363
364//
365// QAnyStringView members that require QAnyStringView::visit()
366//
367
368constexpr QChar QAnyStringView::front() const
369{
370 return visit([] (auto that) { return QAnyStringView::toQChar(that.front()); });
371}
372constexpr QChar QAnyStringView::back() const
373{
374 return visit([] (auto that) { return QAnyStringView::toQChar(that.back()); });
375}
376
377
378class Q_CORE_EXPORT QString
379{
380 typedef QTypedArrayData<char16_t> Data;
381public:
382 typedef QStringPrivate DataPointer;
383
384 inline constexpr QString() noexcept;
385 explicit QString(const QChar *unicode, qsizetype size = -1);
386 QString(QChar c);
387 QString(qsizetype size, QChar c);
388 inline QString(QLatin1String latin1);
389#if defined(__cpp_char8_t) || defined(Q_CLANG_QDOC)
390 Q_WEAK_OVERLOAD
391 inline QString(const char8_t *str)
392 : QString(fromUtf8(str))
393 {}
394#endif
395 inline QString(const QString &) noexcept;
396 inline ~QString();
397 QString &operator=(QChar c);
398 QString &operator=(const QString &) noexcept;
399 QString &operator=(QLatin1String latin1);
400 inline QString(QString &&other) noexcept
401 { qSwap(d, other.d); }
402 QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_PURE_SWAP(QString)
403 inline void swap(QString &other) noexcept { qSwap(d, other.d); }
404 inline qsizetype size() const { return d.size; }
405 inline qsizetype count() const { return d.size; }
406 inline qsizetype length() const { return d.size; }
407 inline bool isEmpty() const;
408 void resize(qsizetype size);
409 void resize(qsizetype size, QChar fillChar);
410
411 QString &fill(QChar c, qsizetype size = -1);
412 void truncate(qsizetype pos);
413 void chop(qsizetype n);
414
415 inline qsizetype capacity() const;
416 inline void reserve(qsizetype size);
417 inline void squeeze();
418
419 inline const QChar *unicode() const;
420 inline QChar *data();
421 inline const QChar *data() const;
422 inline const QChar *constData() const;
423
424 inline void detach();
425 inline bool isDetached() const;
426 inline bool isSharedWith(const QString &other) const { return d.isSharedWith(other.d); }
427 void clear();
428
429 inline const QChar at(qsizetype i) const;
430 const QChar operator[](qsizetype i) const;
431 [[nodiscard]] QChar &operator[](qsizetype i);
432
433 [[nodiscard]] inline QChar front() const { return at(0); }
434 [[nodiscard]] inline QChar &front();
435 [[nodiscard]] inline QChar back() const { return at(size() - 1); }
436 [[nodiscard]] inline QChar &back();
437
438 [[nodiscard]] QString arg(qlonglong a, int fieldwidth=0, int base=10,
439 QChar fillChar = QLatin1Char(' ')) const;
440 [[nodiscard]] QString arg(qulonglong a, int fieldwidth=0, int base=10,
441 QChar fillChar = QLatin1Char(' ')) const;
442 [[nodiscard]] QString arg(long a, int fieldwidth=0, int base=10,
443 QChar fillChar = QLatin1Char(' ')) const;
444 [[nodiscard]] QString arg(ulong a, int fieldwidth=0, int base=10,
445 QChar fillChar = QLatin1Char(' ')) const;
446 [[nodiscard]] QString arg(int a, int fieldWidth = 0, int base = 10,
447 QChar fillChar = QLatin1Char(' ')) const;
448 [[nodiscard]] QString arg(uint a, int fieldWidth = 0, int base = 10,
449 QChar fillChar = QLatin1Char(' ')) const;
450 [[nodiscard]] QString arg(short a, int fieldWidth = 0, int base = 10,
451 QChar fillChar = QLatin1Char(' ')) const;
452 [[nodiscard]] QString arg(ushort a, int fieldWidth = 0, int base = 10,
453 QChar fillChar = QLatin1Char(' ')) const;
454 [[nodiscard]] QString arg(double a, int fieldWidth = 0, char fmt = 'g', int prec = -1,
455 QChar fillChar = QLatin1Char(' ')) const;
456 [[nodiscard]] QString arg(char a, int fieldWidth = 0,
457 QChar fillChar = QLatin1Char(' ')) const;
458 [[nodiscard]] QString arg(QChar a, int fieldWidth = 0,
459 QChar fillChar = QLatin1Char(' ')) const;
460#if QT_STRINGVIEW_LEVEL < 2
461 [[nodiscard]] QString arg(const QString &a, int fieldWidth = 0,
462 QChar fillChar = QLatin1Char(' ')) const;
463#endif
464 [[nodiscard]] QString arg(QStringView a, int fieldWidth = 0,
465 QChar fillChar = QLatin1Char(' ')) const;
466 [[nodiscard]] QString arg(QLatin1String a, int fieldWidth = 0,
467 QChar fillChar = QLatin1Char(' ')) const;
468private:
469 template <typename T>
470 struct is_convertible_to_view_or_qstring_helper
471 : std::integral_constant<bool,
472 std::is_convertible<T, QString>::value ||
473 std::is_convertible<T, QStringView>::value ||
474 std::is_convertible<T, QLatin1String>::value> {};
475 template <typename T>
476 struct is_convertible_to_view_or_qstring
477 : is_convertible_to_view_or_qstring_helper<typename std::decay<T>::type> {};
478public:
479 template <typename...Args>
480 [[nodiscard]]
481#ifdef Q_CLANG_QDOC
482 QString
483#else
484 typename std::enable_if<
485 sizeof...(Args) >= 2 && std::is_same<
486 QtPrivate::BoolList<is_convertible_to_view_or_qstring<Args>::value..., true>,
487 QtPrivate::BoolList<true, is_convertible_to_view_or_qstring<Args>::value...>
488 >::value,
489 QString
490 >::type
491#endif
492 arg(Args &&...args) const
493 { return qToStringViewIgnoringNull(*this).arg(std::forward<Args>(args)...); }
494
495 static QString vasprintf(const char *format, va_list ap) Q_ATTRIBUTE_FORMAT_PRINTF(1, 0);
496 static QString asprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(1, 2);
497
498 [[nodiscard]] qsizetype indexOf(QChar c, qsizetype from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
499 [[nodiscard]] qsizetype indexOf(QLatin1String s, qsizetype from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
500#if QT_STRINGVIEW_LEVEL < 2
501 [[nodiscard]] qsizetype indexOf(const QString &s, qsizetype from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
502#endif
503 [[nodiscard]] qsizetype indexOf(QStringView s, qsizetype from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
504 { return QtPrivate::findString(*this, from, s, cs); }
505 [[nodiscard]] qsizetype lastIndexOf(QChar c, qsizetype from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
506 [[nodiscard]] qsizetype lastIndexOf(QLatin1String s, qsizetype from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
507#if QT_STRINGVIEW_LEVEL < 2
508 [[nodiscard]] qsizetype lastIndexOf(const QString &s, qsizetype from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
509#endif
510
511 [[nodiscard]] qsizetype lastIndexOf(QStringView s, qsizetype from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
512 { return QtPrivate::lastIndexOf(*this, from, s, cs); }
513
514 [[nodiscard]] inline bool contains(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
515#if QT_STRINGVIEW_LEVEL < 2
516 [[nodiscard]] inline bool contains(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
517#endif
518 [[nodiscard]] inline bool contains(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
519 [[nodiscard]] inline bool contains(QStringView s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept;
520 [[nodiscard]] qsizetype count(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
521 [[nodiscard]] qsizetype count(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
522 [[nodiscard]] qsizetype count(QStringView s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
523
524#if QT_CONFIG(regularexpression)
525 [[nodiscard]] qsizetype indexOf(const QRegularExpression &re, qsizetype from = 0,
526 QRegularExpressionMatch *rmatch = nullptr) const;
527 [[nodiscard]] qsizetype lastIndexOf(const QRegularExpression &re, qsizetype from = -1,
528 QRegularExpressionMatch *rmatch = nullptr) const;
529 [[nodiscard]] bool contains(const QRegularExpression &re, QRegularExpressionMatch *rmatch = nullptr) const;
530 [[nodiscard]] qsizetype count(const QRegularExpression &re) const;
531#endif
532
533 enum SectionFlag {
534 SectionDefault = 0x00,
535 SectionSkipEmpty = 0x01,
536 SectionIncludeLeadingSep = 0x02,
537 SectionIncludeTrailingSep = 0x04,
538 SectionCaseInsensitiveSeps = 0x08
539 };
540 Q_DECLARE_FLAGS(SectionFlags, SectionFlag)
541
542 [[nodiscard]] QString section(QChar sep, qsizetype start, qsizetype end = -1, SectionFlags flags = SectionDefault) const;
543 [[nodiscard]] QString section(const QString &in_sep, qsizetype start, qsizetype end = -1, SectionFlags flags = SectionDefault) const;
544#if QT_CONFIG(regularexpression)
545 [[nodiscard]] QString section(const QRegularExpression &re, qsizetype start, qsizetype end = -1, SectionFlags flags = SectionDefault) const;
546#endif
547 [[nodiscard]] QString left(qsizetype n) const;
548 [[nodiscard]] QString right(qsizetype n) const;
549 [[nodiscard]] QString mid(qsizetype position, qsizetype n = -1) const;
550
551 [[nodiscard]] QString first(qsizetype n) const
552 { Q_ASSERT(n >= 0); Q_ASSERT(n <= size()); return QString(data(), n); }
553 [[nodiscard]] QString last(qsizetype n) const
554 { Q_ASSERT(n >= 0); Q_ASSERT(n <= size()); return QString(data() + size() - n, n); }
555 [[nodiscard]] QString sliced(qsizetype pos) const
556 { Q_ASSERT(pos >= 0); Q_ASSERT(pos <= size()); return QString(data() + pos, size() - pos); }
557 [[nodiscard]] QString sliced(qsizetype pos, qsizetype n) const
558 { Q_ASSERT(pos >= 0); Q_ASSERT(n >= 0); Q_ASSERT(size_t(pos) + size_t(n) <= size_t(size())); return QString(data() + pos, n); }
559 [[nodiscard]] QString chopped(qsizetype n) const
560 { Q_ASSERT(n >= 0); Q_ASSERT(n <= size()); return first(size() - n); }
561
562
563#if QT_STRINGVIEW_LEVEL < 2
564 bool startsWith(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
565#endif
566 [[nodiscard]] bool startsWith(QStringView s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
567 { return QtPrivate::startsWith(*this, s, cs); }
568 bool startsWith(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
569 bool startsWith(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
570
571#if QT_STRINGVIEW_LEVEL < 2
572 bool endsWith(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
573#endif
574 [[nodiscard]] bool endsWith(QStringView s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
575 { return QtPrivate::endsWith(*this, s, cs); }
576 bool endsWith(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
577 bool endsWith(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
578
579 bool isUpper() const;
580 bool isLower() const;
581
582 [[nodiscard]] QString leftJustified(qsizetype width, QChar fill = QLatin1Char(' '), bool trunc = false) const;
583 [[nodiscard]] QString rightJustified(qsizetype width, QChar fill = QLatin1Char(' '), bool trunc = false) const;
584
585#if !defined(Q_CLANG_QDOC)
586 [[nodiscard]] QString toLower() const &
587 { return toLower_helper(*this); }
588 [[nodiscard]] QString toLower() &&
589 { return toLower_helper(*this); }
590 [[nodiscard]] QString toUpper() const &
591 { return toUpper_helper(*this); }
592 [[nodiscard]] QString toUpper() &&
593 { return toUpper_helper(*this); }
594 [[nodiscard]] QString toCaseFolded() const &
595 { return toCaseFolded_helper(*this); }
596 [[nodiscard]] QString toCaseFolded() &&
597 { return toCaseFolded_helper(*this); }
598 [[nodiscard]] QString trimmed() const &
599 { return trimmed_helper(*this); }
600 [[nodiscard]] QString trimmed() &&
601 { return trimmed_helper(*this); }
602 [[nodiscard]] QString simplified() const &
603 { return simplified_helper(*this); }
604 [[nodiscard]] QString simplified() &&
605 { return simplified_helper(*this); }
606#else
607 [[nodiscard]] QString toLower() const;
608 [[nodiscard]] QString toUpper() const;
609 [[nodiscard]] QString toCaseFolded() const;
610 [[nodiscard]] QString trimmed() const;
611 [[nodiscard]] QString simplified() const;
612#endif
613 [[nodiscard]] QString toHtmlEscaped() const;
614
615 QString &insert(qsizetype i, QChar c);
616 QString &insert(qsizetype i, const QChar *uc, qsizetype len);
617#if QT_STRINGVIEW_LEVEL < 2
618 inline QString &insert(qsizetype i, const QString &s) { return insert(i, s.constData(), s.length()); }
619#endif
620 inline QString &insert(qsizetype i, QStringView v) { return insert(i, v.data(), v.length()); }
621 QString &insert(qsizetype i, QLatin1String s);
622
623 QString &append(QChar c);
624 QString &append(const QChar *uc, qsizetype len);
625#if QT_STRINGVIEW_LEVEL < 2
626 QString &append(const QString &s);
627#endif
628 inline QString &append(QStringView v) { return append(v.data(), v.length()); }
629 QString &append(QLatin1String s);
630
631 inline QString &prepend(QChar c) { return insert(0, c); }
632 inline QString &prepend(const QChar *uc, qsizetype len) { return insert(0, uc, len); }
633#if QT_STRINGVIEW_LEVEL < 2
634 inline QString &prepend(const QString &s) { return insert(0, s); }
635#endif
636 inline QString &prepend(QStringView v) { return prepend(v.data(), v.length()); }
637 inline QString &prepend(QLatin1String s) { return insert(0, s); }
638
639 inline QString &operator+=(QChar c) { return append(c); }
640
641#if QT_STRINGVIEW_LEVEL < 2
642 inline QString &operator+=(const QString &s) { return append(s); }
643#endif
644 inline QString &operator+=(QStringView v) { return append(v); }
645 inline QString &operator+=(QLatin1String s) { return append(s); }
646
647 QString &remove(qsizetype i, qsizetype len);
648 QString &remove(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive);
649 QString &remove(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive);
650 QString &remove(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive);
651 template <typename Predicate>
652 QString &removeIf(Predicate pred)
653 {
654 QtPrivate::sequential_erase_if(*this, pred);
655 return *this;
656 }
657 QString &replace(qsizetype i, qsizetype len, QChar after);
658 QString &replace(qsizetype i, qsizetype len, const QChar *s, qsizetype slen);
659 QString &replace(qsizetype i, qsizetype len, const QString &after);
660 QString &replace(QChar before, QChar after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
661 QString &replace(const QChar *before, qsizetype blen, const QChar *after, qsizetype alen, Qt::CaseSensitivity cs = Qt::CaseSensitive);
662 QString &replace(QLatin1String before, QLatin1String after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
663 QString &replace(QLatin1String before, const QString &after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
664 QString &replace(const QString &before, QLatin1String after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
665 QString &replace(const QString &before, const QString &after,
666 Qt::CaseSensitivity cs = Qt::CaseSensitive);
667 QString &replace(QChar c, const QString &after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
668 QString &replace(QChar c, QLatin1String after, Qt::CaseSensitivity cs = Qt::CaseSensitive);
669#if QT_CONFIG(regularexpression)
670 QString &replace(const QRegularExpression &re, const QString &after);
671 inline QString &remove(const QRegularExpression &re)
672 { return replace(re, QString()); }
673#endif
674
675public:
676 [[nodiscard]]
677 QStringList split(const QString &sep, Qt::SplitBehavior behavior = Qt::KeepEmptyParts,
678 Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
679 [[nodiscard]]
680 QStringList split(QChar sep, Qt::SplitBehavior behavior = Qt::KeepEmptyParts,
681 Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
682#ifndef QT_NO_REGULAREXPRESSION
683 [[nodiscard]]
684 QStringList split(const QRegularExpression &sep,
685 Qt::SplitBehavior behavior = Qt::KeepEmptyParts) const;
686#endif
687
688 template <typename Needle, typename...Flags>
689 [[nodiscard]] inline auto tokenize(Needle &&needle, Flags...flags) const &
690 noexcept(noexcept(qTokenize(std::declval<const QString &>(), std::forward<Needle>(needle), flags...)))
691 -> decltype(qTokenize(*this, std::forward<Needle>(needle), flags...))
692 { return qTokenize(qToStringViewIgnoringNull(*this), std::forward<Needle>(needle), flags...); }
693
694 template <typename Needle, typename...Flags>
695 [[nodiscard]] inline auto tokenize(Needle &&needle, Flags...flags) const &&
696 noexcept(noexcept(qTokenize(std::declval<const QString>(), std::forward<Needle>(needle), flags...)))
697 -> decltype(qTokenize(std::move(*this), std::forward<Needle>(needle), flags...))
698 { return qTokenize(std::move(*this), std::forward<Needle>(needle), flags...); }
699
700 template <typename Needle, typename...Flags>
701 [[nodiscard]] inline auto tokenize(Needle &&needle, Flags...flags) &&
702 noexcept(noexcept(qTokenize(std::declval<QString>(), std::forward<Needle>(needle), flags...)))
703 -> decltype(qTokenize(std::move(*this), std::forward<Needle>(needle), flags...))
704 { return qTokenize(std::move(*this), std::forward<Needle>(needle), flags...); }
705
706
707 enum NormalizationForm {
708 NormalizationForm_D,
709 NormalizationForm_C,
710 NormalizationForm_KD,
711 NormalizationForm_KC
712 };
713 [[nodiscard]] QString normalized(NormalizationForm mode, QChar::UnicodeVersion version = QChar::Unicode_Unassigned) const;
714
715 [[nodiscard]] QString repeated(qsizetype times) const;
716
717 const ushort *utf16() const; // ### Qt 7 char16_t
718
719#if !defined(Q_CLANG_QDOC)
720 [[nodiscard]] QByteArray toLatin1() const &
721 { return toLatin1_helper(*this); }
722 [[nodiscard]] QByteArray toLatin1() &&
723 { return toLatin1_helper_inplace(*this); }
724 [[nodiscard]] QByteArray toUtf8() const &
725 { return toUtf8_helper(*this); }
726 [[nodiscard]] QByteArray toUtf8() &&
727 { return toUtf8_helper(*this); }
728 [[nodiscard]] QByteArray toLocal8Bit() const &
729 { return toLocal8Bit_helper(isNull() ? nullptr : constData(), size()); }
730 [[nodiscard]] QByteArray toLocal8Bit() &&
731 { return toLocal8Bit_helper(isNull() ? nullptr : constData(), size()); }
732#else
733 [[nodiscard]] QByteArray toLatin1() const;
734 [[nodiscard]] QByteArray toUtf8() const;
735 [[nodiscard]] QByteArray toLocal8Bit() const;
736#endif
737 [[nodiscard]] QList<uint> toUcs4() const; // ### Qt 7 char32_t
738
739 // note - this are all inline so we can benefit from strlen() compile time optimizations
740 static QString fromLatin1(QByteArrayView ba);
741 Q_WEAK_OVERLOAD
742 static inline QString fromLatin1(const QByteArray &ba) { return fromLatin1(QByteArrayView(ba)); }
743 static inline QString fromLatin1(const char *str, qsizetype size)
744 {
745 return fromLatin1(QByteArrayView(str, !str || size < 0 ? qstrlen(str) : size));
746 }
747 static QString fromUtf8(QByteArrayView utf8);
748 Q_WEAK_OVERLOAD
749 static inline QString fromUtf8(const QByteArray &ba) { return fromUtf8(QByteArrayView(ba)); }
750 static inline QString fromUtf8(const char *utf8, qsizetype size)
751 {
752 return fromUtf8(QByteArrayView(utf8, !utf8 || size < 0 ? qstrlen(utf8) : size));
753 }
754#if defined(__cpp_char8_t) || defined(Q_CLANG_QDOC)
755 Q_WEAK_OVERLOAD
756 static inline QString fromUtf8(const char8_t *str)
757 { return fromUtf8(reinterpret_cast<const char *>(str)); }
758 Q_WEAK_OVERLOAD
759 static inline QString fromUtf8(const char8_t *str, qsizetype size)
760 { return fromUtf8(reinterpret_cast<const char *>(str), size); }
761#endif
762 static QString fromLocal8Bit(QByteArrayView ba);
763 Q_WEAK_OVERLOAD
764 static inline QString fromLocal8Bit(const QByteArray &ba) { return fromLocal8Bit(QByteArrayView(ba)); }
765 static inline QString fromLocal8Bit(const char *str, qsizetype size)
766 {
767 return fromLocal8Bit(QByteArrayView(str, !str || size < 0 ? qstrlen(str) : size));
768 }
769 static QString fromUtf16(const char16_t *, qsizetype size = -1);
770 static QString fromUcs4(const char32_t *, qsizetype size = -1);
771 static QString fromRawData(const QChar *, qsizetype size);
772
773#if QT_DEPRECATED_SINCE(6, 0)
774 QT_DEPRECATED_VERSION_X_6_0("Use char16_t* overload.")
775 static QString fromUtf16(const ushort *str, qsizetype size = -1)
776 { return fromUtf16(reinterpret_cast<const char16_t *>(str), size); }
777 QT_DEPRECATED_VERSION_X_6_0("Use char32_t* overload.")
778 static QString fromUcs4(const uint *str, qsizetype size = -1)
779 { return fromUcs4(reinterpret_cast<const char32_t *>(str), size); }
780#endif
781
782 inline qsizetype toWCharArray(wchar_t *array) const;
783 [[nodiscard]] static inline QString fromWCharArray(const wchar_t *string, qsizetype size = -1);
784
785 QString &setRawData(const QChar *unicode, qsizetype size);
786 QString &setUnicode(const QChar *unicode, qsizetype size);
787 inline QString &setUtf16(const ushort *utf16, qsizetype size); // ### Qt 7 char16_t
788
789#if QT_STRINGVIEW_LEVEL < 2
790 int compare(const QString &s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept;
791#endif
792 int compare(QLatin1String other, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept;
793 inline int compare(QStringView s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept;
794 int compare(QChar ch, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
795 { return compare(QStringView{&ch, 1}, cs); }
796
797 static inline int compare(const QString &s1, const QString &s2,
798 Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept
799 { return s1.compare(s2, cs); }
800
801 static inline int compare(const QString &s1, QLatin1String s2,
802 Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept
803 { return s1.compare(s2, cs); }
804 static inline int compare(QLatin1String s1, const QString &s2,
805 Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept
806 { return -s2.compare(s1, cs); }
807 static int compare(const QString &s1, QStringView s2, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept
808 { return s1.compare(s2, cs); }
809 static int compare(QStringView s1, const QString &s2, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept
810 { return -s2.compare(s1, cs); }
811
812 int localeAwareCompare(const QString& s) const;
813 int localeAwareCompare(QStringView s) const;
814 static int localeAwareCompare(const QString& s1, const QString& s2)
815 { return s1.localeAwareCompare(s2); }
816
817 static int localeAwareCompare(QStringView s1, QStringView s2);
818
819 short toShort(bool *ok=nullptr, int base=10) const
820 { return toIntegral_helper<short>(*this, ok, base); }
821 ushort toUShort(bool *ok=nullptr, int base=10) const
822 { return toIntegral_helper<ushort>(*this, ok, base); }
823 int toInt(bool *ok=nullptr, int base=10) const
824 { return toIntegral_helper<int>(*this, ok, base); }
825 uint toUInt(bool *ok=nullptr, int base=10) const
826 { return toIntegral_helper<uint>(*this, ok, base); }
827 long toLong(bool *ok=nullptr, int base=10) const
828 { return toIntegral_helper<long>(*this, ok, base); }
829 ulong toULong(bool *ok=nullptr, int base=10) const
830 { return toIntegral_helper<ulong>(*this, ok, base); }
831 qlonglong toLongLong(bool *ok=nullptr, int base=10) const;
832 qulonglong toULongLong(bool *ok=nullptr, int base=10) const;
833 float toFloat(bool *ok=nullptr) const;
834 double toDouble(bool *ok=nullptr) const;
835
836 QString &setNum(short, int base=10);
837 QString &setNum(ushort, int base=10);
838 QString &setNum(int, int base=10);
839 QString &setNum(uint, int base=10);
840 QString &setNum(long, int base=10);
841 QString &setNum(ulong, int base=10);
842 QString &setNum(qlonglong, int base=10);
843 QString &setNum(qulonglong, int base=10);
844 QString &setNum(float, char f='g', int prec=6);
845 QString &setNum(double, char f='g', int prec=6);
846
847 static QString number(int, int base=10);
848 static QString number(uint, int base=10);
849 static QString number(long, int base=10);
850 static QString number(ulong, int base=10);
851 static QString number(qlonglong, int base=10);
852 static QString number(qulonglong, int base=10);
853 static QString number(double, char f='g', int prec=6);
854
855 friend bool operator==(const QString &s1, const QString &s2) noexcept
856 { return (s1.size() == s2.size()) && QtPrivate::compareStrings(s1, s2, Qt::CaseSensitive) == 0; }
857 friend bool operator< (const QString &s1, const QString &s2) noexcept
858 { return QtPrivate::compareStrings(s1, s2, Qt::CaseSensitive) < 0; }
859 friend bool operator> (const QString &s1, const QString &s2) noexcept { return s2 < s1; }
860 friend bool operator!=(const QString &s1, const QString &s2) noexcept { return !(s1 == s2); }
861 friend bool operator<=(const QString &s1, const QString &s2) noexcept { return !(s1 > s2); }
862 friend bool operator>=(const QString &s1, const QString &s2) noexcept { return !(s1 < s2); }
863
864 friend bool operator==(const QString &s1, QLatin1String s2) noexcept
865 { return (s1.size() == s2.size()) && QtPrivate::compareStrings(s1, s2, Qt::CaseSensitive) == 0; }
866 friend bool operator< (const QString &s1, QLatin1String s2) noexcept
867 { return QtPrivate::compareStrings(s1, s2, Qt::CaseSensitive) < 0; }
868 friend bool operator> (const QString &s1, QLatin1String s2) noexcept
869 { return QtPrivate::compareStrings(s1, s2, Qt::CaseSensitive) > 0; }
870 friend bool operator!=(const QString &s1, QLatin1String s2) noexcept { return !(s1 == s2); }
871 friend bool operator<=(const QString &s1, QLatin1String s2) noexcept { return !(s1 > s2); }
872 friend bool operator>=(const QString &s1, QLatin1String s2) noexcept { return !(s1 < s2); }
873
874 friend bool operator==(QLatin1String s1, const QString &s2) noexcept { return s2 == s1; }
875 friend bool operator< (QLatin1String s1, const QString &s2) noexcept { return s2 > s1; }
876 friend bool operator> (QLatin1String s1, const QString &s2) noexcept { return s2 < s1; }
877 friend bool operator!=(QLatin1String s1, const QString &s2) noexcept { return s2 != s1; }
878 friend bool operator<=(QLatin1String s1, const QString &s2) noexcept { return s2 >= s1; }
879 friend bool operator>=(QLatin1String s1, const QString &s2) noexcept { return s2 <= s1; }
880
881 // Check isEmpty() instead of isNull() for backwards compatibility.
882 friend bool operator==(const QString &s1, std::nullptr_t) noexcept { return s1.isEmpty(); }
883 friend bool operator!=(const QString &s1, std::nullptr_t) noexcept { return !s1.isEmpty(); }
884 friend bool operator< (const QString & , std::nullptr_t) noexcept { return false; }
885 friend bool operator> (const QString &s1, std::nullptr_t) noexcept { return !s1.isEmpty(); }
886 friend bool operator<=(const QString &s1, std::nullptr_t) noexcept { return s1.isEmpty(); }
887 friend bool operator>=(const QString & , std::nullptr_t) noexcept { return true; }
888 friend bool operator==(std::nullptr_t, const QString &s2) noexcept { return s2 == nullptr; }
889 friend bool operator!=(std::nullptr_t, const QString &s2) noexcept { return s2 != nullptr; }
890 friend bool operator< (std::nullptr_t, const QString &s2) noexcept { return s2 > nullptr; }
891 friend bool operator> (std::nullptr_t, const QString &s2) noexcept { return s2 < nullptr; }
892 friend bool operator<=(std::nullptr_t, const QString &s2) noexcept { return s2 >= nullptr; }
893 friend bool operator>=(std::nullptr_t, const QString &s2) noexcept { return s2 <= nullptr; }
894
895 friend bool operator==(const QString &s1, const char16_t *s2) noexcept { return s1 == QStringView(s2); }
896 friend bool operator!=(const QString &s1, const char16_t *s2) noexcept { return s1 != QStringView(s2); }
897 friend bool operator< (const QString &s1, const char16_t *s2) noexcept { return s1 < QStringView(s2); }
898 friend bool operator> (const QString &s1, const char16_t *s2) noexcept { return s1 > QStringView(s2); }
899 friend bool operator<=(const QString &s1, const char16_t *s2) noexcept { return s1 <= QStringView(s2); }
900 friend bool operator>=(const QString &s1, const char16_t *s2) noexcept { return s1 >= QStringView(s2); }
901
902 friend bool operator==(const char16_t *s1, const QString &s2) noexcept { return s2 == s1; }
903 friend bool operator!=(const char16_t *s1, const QString &s2) noexcept { return s2 != s1; }
904 friend bool operator< (const char16_t *s1, const QString &s2) noexcept { return s2 > s1; }
905 friend bool operator> (const char16_t *s1, const QString &s2) noexcept { return s2 < s1; }
906 friend bool operator<=(const char16_t *s1, const QString &s2) noexcept { return s2 >= s1; }
907 friend bool operator>=(const char16_t *s1, const QString &s2) noexcept { return s2 <= s1; }
908
909 // QChar <> QString
910 friend inline bool operator==(QChar lhs, const QString &rhs) noexcept
911 { return rhs.size() == 1 && lhs == rhs.front(); }
912 friend inline bool operator< (QChar lhs, const QString &rhs) noexcept
913 { return compare_helper(&lhs, 1, rhs.data(), rhs.size()) < 0; }
914 friend inline bool operator> (QChar lhs, const QString &rhs) noexcept
915 { return compare_helper(&lhs, 1, rhs.data(), rhs.size()) > 0; }
916
917 friend inline bool operator!=(QChar lhs, const QString &rhs) noexcept { return !(lhs == rhs); }
918 friend inline bool operator<=(QChar lhs, const QString &rhs) noexcept { return !(lhs > rhs); }
919 friend inline bool operator>=(QChar lhs, const QString &rhs) noexcept { return !(lhs < rhs); }
920
921 friend inline bool operator==(const QString &lhs, QChar rhs) noexcept { return rhs == lhs; }
922 friend inline bool operator!=(const QString &lhs, QChar rhs) noexcept { return !(rhs == lhs); }
923 friend inline bool operator< (const QString &lhs, QChar rhs) noexcept { return rhs > lhs; }
924 friend inline bool operator> (const QString &lhs, QChar rhs) noexcept { return rhs < lhs; }
925 friend inline bool operator<=(const QString &lhs, QChar rhs) noexcept { return !(rhs < lhs); }
926 friend inline bool operator>=(const QString &lhs, QChar rhs) noexcept { return !(rhs > lhs); }
927
928 // ASCII compatibility
929#if defined(QT_RESTRICTED_CAST_FROM_ASCII)
930 template <qsizetype N>
931 inline QString(const char (&ch)[N])
932 : QString(fromUtf8(ch))
933 {}
934 template <qsizetype N>
935 QString(char (&)[N]) = delete;
936 template <qsizetype N>
937 inline QString &operator=(const char (&ch)[N])
938 { return (*this = fromUtf8(ch, N - 1)); }
939 template <qsizetype N>
940 QString &operator=(char (&)[N]) = delete;
941#endif
942#if !defined(QT_NO_CAST_FROM_ASCII) && !defined(QT_RESTRICTED_CAST_FROM_ASCII)
943 QT_ASCII_CAST_WARN inline QString(const char *ch)
944 : QString(fromUtf8(ch))
945 {}
946 QT_ASCII_CAST_WARN inline QString(const QByteArray &a)
947 : QString(fromUtf8(a))
948 {}
949 QT_ASCII_CAST_WARN inline QString &operator=(const char *ch)
950 { return (*this = fromUtf8(ch)); }
951 QT_ASCII_CAST_WARN inline QString &operator=(const QByteArray &a)
952 { return (*this = fromUtf8(a)); }
953
954 // these are needed, so it compiles with STL support enabled
955 QT_ASCII_CAST_WARN inline QString &prepend(const char *s)
956 { return prepend(QString::fromUtf8(s)); }
957 QT_ASCII_CAST_WARN inline QString &prepend(const QByteArray &s)
958 { return prepend(QString::fromUtf8(s)); }
959 QT_ASCII_CAST_WARN inline QString &append(const char *s)
960 { return append(QString::fromUtf8(s)); }
961 QT_ASCII_CAST_WARN inline QString &append(const QByteArray &s)
962 { return append(QString::fromUtf8(s)); }
963 QT_ASCII_CAST_WARN inline QString &insert(qsizetype i, const char *s)
964 { return insert(i, QString::fromUtf8(s)); }
965 QT_ASCII_CAST_WARN inline QString &insert(qsizetype i, const QByteArray &s)
966 { return insert(i, QString::fromUtf8(s)); }
967 QT_ASCII_CAST_WARN inline QString &operator+=(const char *s)
968 { return append(QString::fromUtf8(s)); }
969 QT_ASCII_CAST_WARN inline QString &operator+=(const QByteArray &s)
970 { return append(QString::fromUtf8(s)); }
971
972 QT_ASCII_CAST_WARN inline bool operator==(const char *s) const;
973 QT_ASCII_CAST_WARN inline bool operator!=(const char *s) const;
974 QT_ASCII_CAST_WARN inline bool operator<(const char *s) const;
975 QT_ASCII_CAST_WARN inline bool operator<=(const char *s) const;
976 QT_ASCII_CAST_WARN inline bool operator>(const char *s) const;
977 QT_ASCII_CAST_WARN inline bool operator>=(const char *s) const;
978
979 QT_ASCII_CAST_WARN inline bool operator==(const QByteArray &s) const;
980 QT_ASCII_CAST_WARN inline bool operator!=(const QByteArray &s) const;
981 QT_ASCII_CAST_WARN inline bool operator<(const QByteArray &s) const;
982 QT_ASCII_CAST_WARN inline bool operator>(const QByteArray &s) const;
983 QT_ASCII_CAST_WARN inline bool operator<=(const QByteArray &s) const;
984 QT_ASCII_CAST_WARN inline bool operator>=(const QByteArray &s) const;
985
986 QT_ASCII_CAST_WARN friend bool operator==(const char *s1, const QString &s2)
987 { return QString::compare_helper(s2.constData(), s2.size(), s1, -1) == 0; }
988 QT_ASCII_CAST_WARN friend bool operator!=(const char *s1, const QString &s2)
989 { return QString::compare_helper(s2.constData(), s2.size(), s1, -1) != 0; }
990 QT_ASCII_CAST_WARN friend bool operator< (const char *s1, const QString &s2)
991 { return QString::compare_helper(s2.constData(), s2.size(), s1, -1) > 0; }
992 QT_ASCII_CAST_WARN friend bool operator> (const char *s1, const QString &s2)
993 { return QString::compare_helper(s2.constData(), s2.size(), s1, -1) < 0; }
994 QT_ASCII_CAST_WARN friend bool operator<=(const char *s1, const QString &s2)
995 { return QString::compare_helper(s2.constData(), s2.size(), s1, -1) >= 0; }
996 QT_ASCII_CAST_WARN friend bool operator>=(const char *s1, const QString &s2)
997 { return QString::compare_helper(s2.constData(), s2.size(), s1, -1) <= 0; }
998#endif
999
1000 typedef QChar *iterator;
1001 typedef const QChar *const_iterator;
1002 typedef iterator Iterator;
1003 typedef const_iterator ConstIterator;
1004 typedef std::reverse_iterator<iterator> reverse_iterator;
1005 typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
1006 inline iterator begin();
1007 inline const_iterator begin() const;
1008 inline const_iterator cbegin() const;
1009 inline const_iterator constBegin() const;
1010 inline iterator end();
1011 inline const_iterator end() const;
1012 inline const_iterator cend() const;
1013 inline const_iterator constEnd() const;
1014 reverse_iterator rbegin() { return reverse_iterator(end()); }
1015 reverse_iterator rend() { return reverse_iterator(begin()); }
1016 const_reverse_iterator rbegin() const { return const_reverse_iterator(end()); }
1017 const_reverse_iterator rend() const { return const_reverse_iterator(begin()); }
1018 const_reverse_iterator crbegin() const { return const_reverse_iterator(end()); }
1019 const_reverse_iterator crend() const { return const_reverse_iterator(begin()); }
1020
1021 // STL compatibility
1022 typedef qsizetype size_type;
1023 typedef qptrdiff difference_type;
1024 typedef const QChar & const_reference;
1025 typedef QChar & reference;
1026 typedef QChar *pointer;
1027 typedef const QChar *const_pointer;
1028 typedef QChar value_type;
1029 inline void push_back(QChar c) { append(c); }
1030 inline void push_back(const QString &s) { append(s); }
1031 inline void push_front(QChar c) { prepend(c); }
1032 inline void push_front(const QString &s) { prepend(s); }
1033 void shrink_to_fit() { squeeze(); }
1034 iterator erase(const_iterator first, const_iterator last);
1035
1036 static inline QString fromStdString(const std::string &s);
1037 inline std::string toStdString() const;
1038 static inline QString fromStdWString(const std::wstring &s);
1039 inline std::wstring toStdWString() const;
1040
1041 static inline QString fromStdU16String(const std::u16string &s);
1042 inline std::u16string toStdU16String() const;
1043 static inline QString fromStdU32String(const std::u32string &s);
1044 inline std::u32string toStdU32String() const;
1045
1046#if defined(Q_OS_DARWIN) || defined(Q_QDOC)
1047 static QString fromCFString(CFStringRef string);
1048 CFStringRef toCFString() const Q_DECL_CF_RETURNS_RETAINED;
1049 static QString fromNSString(const NSString *string);
1050 NSString *toNSString() const Q_DECL_NS_RETURNS_AUTORELEASED;
1051#endif
1052
1053 inline bool isNull() const { return d->isNull(); }
1054
1055
1056 bool isSimpleText() const;
1057 bool isRightToLeft() const;
1058 [[nodiscard]] bool isValidUtf16() const noexcept
1059 { return QStringView(*this).isValidUtf16(); }
1060
1061 QString(qsizetype size, Qt::Initialization);
1062 explicit QString(DataPointer &&dd) : d(std::move(dd)) {}
1063
1064private:
1065#if defined(QT_NO_CAST_FROM_ASCII)
1066 QString &operator+=(const char *s);
1067 QString &operator+=(const QByteArray &s);
1068 QString(const char *ch);
1069 QString(const QByteArray &a);
1070 QString &operator=(const char *ch);
1071 QString &operator=(const QByteArray &a);
1072#endif
1073
1074 DataPointer d;
1075 static const char16_t _empty;
1076
1077 void reallocData(qsizetype alloc, QArrayData::AllocationOption option);
1078 void reallocGrowData(qsizetype n);
1079 static int compare_helper(const QChar *data1, qsizetype length1,
1080 const QChar *data2, qsizetype length2,
1081 Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
1082 static int compare_helper(const QChar *data1, qsizetype length1,
1083 const char *data2, qsizetype length2,
1084 Qt::CaseSensitivity cs = Qt::CaseSensitive);
1085 static int localeAwareCompare_helper(const QChar *data1, qsizetype length1,
1086 const QChar *data2, qsizetype length2);
1087 static QString toLower_helper(const QString &str);
1088 static QString toLower_helper(QString &str);
1089 static QString toUpper_helper(const QString &str);
1090 static QString toUpper_helper(QString &str);
1091 static QString toCaseFolded_helper(const QString &str);
1092 static QString toCaseFolded_helper(QString &str);
1093 static QString trimmed_helper(const QString &str);
1094 static QString trimmed_helper(QString &str);
1095 static QString simplified_helper(const QString &str);
1096 static QString simplified_helper(QString &str);
1097 static QByteArray toLatin1_helper(const QString &);
1098 static QByteArray toLatin1_helper_inplace(QString &);
1099 static QByteArray toUtf8_helper(const QString &);
1100 static QByteArray toLocal8Bit_helper(const QChar *data, qsizetype size);
1101 static qsizetype toUcs4_helper(const ushort *uc, qsizetype length, uint *out); // ### Qt 7 char16_t
1102 static qlonglong toIntegral_helper(QStringView string, bool *ok, int base);
1103 static qulonglong toIntegral_helper(QStringView string, bool *ok, uint base);
1104 void replace_helper(size_t *indices, qsizetype nIndices, qsizetype blen, const QChar *after, qsizetype alen);
1105 friend class QStringView;
1106 friend class QByteArray;
1107 friend class QCollator;
1108 friend struct QAbstractConcatenable;
1109
1110 template <typename T> static
1111 T toIntegral_helper(QStringView string, bool *ok, int base)
1112 {
1113 using Int64 = typename std::conditional<std::is_unsigned<T>::value, qulonglong, qlonglong>::type;
1114 using Int32 = typename std::conditional<std::is_unsigned<T>::value, uint, int>::type;
1115
1116 // we select the right overload by casting base to int or uint
1117 Int64 val = toIntegral_helper(string, ok, Int32(base));
1118 if (T(val) != val) {
1119 if (ok)
1120 *ok = false;
1121 val = 0;
1122 }
1123 return T(val);
1124 }
1125
1126public:
1127 inline DataPointer &data_ptr() { return d; }
1128 inline const DataPointer &data_ptr() const { return d; }
1129};
1130
1131//
1132// QLatin1String inline members that require QString:
1133//
1134
1135QString QLatin1String::toString() const { return *this; }
1136
1137//
1138// QStringView inline members that require QString:
1139//
1140
1141QString QStringView::toString() const
1142{ return Q_ASSERT(size() == length()), QString(data(), length()); }
1143
1144qint64 QStringView::toLongLong(bool *ok, int base) const
1145{ return QString::toIntegral_helper<qint64>(*this, ok, base); }
1146quint64 QStringView::toULongLong(bool *ok, int base) const
1147{ return QString::toIntegral_helper<quint64>(*this, ok, base); }
1148long QStringView::toLong(bool *ok, int base) const
1149{ return QString::toIntegral_helper<long>(*this, ok, base); }
1150ulong QStringView::toULong(bool *ok, int base) const
1151{ return QString::toIntegral_helper<ulong>(*this, ok, base); }
1152int QStringView::toInt(bool *ok, int base) const
1153{ return QString::toIntegral_helper<int>(*this, ok, base); }
1154uint QStringView::toUInt(bool *ok, int base) const
1155{ return QString::toIntegral_helper<uint>(*this, ok, base); }
1156short QStringView::toShort(bool *ok, int base) const
1157{ return QString::toIntegral_helper<short>(*this, ok, base); }
1158ushort QStringView::toUShort(bool *ok, int base) const
1159{ return QString::toIntegral_helper<ushort>(*this, ok, base); }
1160
1161//
1162// QUtf8StringView inline members that require QString:
1163//
1164
1165template <bool UseChar8T>
1166QString QBasicUtf8StringView<UseChar8T>::toString() const
1167{
1168 Q_ASSERT(size() == int(size()));
1169 return QString::fromUtf8(data(), int(size()));
1170}
1171
1172//
1173// QAnyStringView inline members that require QString:
1174//
1175
1176QAnyStringView::QAnyStringView(const QByteArray &str) noexcept
1177 : QAnyStringView{str.isNull() ? nullptr : str.data(), str.size()} {}
1178QAnyStringView::QAnyStringView(const QString &str) noexcept
1179 : QAnyStringView{str.isNull() ? nullptr : str.data(), str.size()} {}
1180
1181QString QAnyStringView::toString() const
1182{ return QtPrivate::convertToQString(*this); }
1183
1184//
1185// QString inline members
1186//
1187inline QString::QString(QLatin1String latin1)
1188{ *this = QString::fromLatin1(latin1.data(), latin1.size()); }
1189inline const QChar QString::at(qsizetype i) const
1190{ Q_ASSERT(size_t(i) < size_t(size())); return QChar(d.data()[i]); }
1191inline const QChar QString::operator[](qsizetype i) const
1192{ Q_ASSERT(size_t(i) < size_t(size())); return QChar(d.data()[i]); }
1193inline bool QString::isEmpty() const
1194{ return d.size == 0; }
1195inline const QChar *QString::unicode() const
1196{ return data(); }
1197inline const QChar *QString::data() const
1198{
1199#if QT5_NULL_STRINGS == 1
1200 return reinterpret_cast<const QChar *>(d.data() ? d.data() : &_empty);
1201#else
1202 return reinterpret_cast<const QChar *>(d.data());
1203#endif
1204}
1205inline QChar *QString::data()
1206{
1207 detach();
1208 Q_ASSERT(d.data());
1209 return reinterpret_cast<QChar *>(d.data());
1210}
1211inline const QChar *QString::constData() const
1212{ return data(); }
1213inline void QString::detach()
1214{ if (d->needsDetach()) reallocData(d.size, QArrayData::KeepSize); }
1215inline bool QString::isDetached() const
1216{ return !d->isShared(); }
1217inline void QString::clear()
1218{ if (!isNull()) *this = QString(); }
1219inline QString::QString(const QString &other) noexcept : d(other.d)
1220{ }
1221inline qsizetype QString::capacity() const { return qsizetype(d->constAllocatedCapacity()); }
1222inline QString &QString::setNum(short n, int base)
1223{ return setNum(qlonglong(n), base); }
1224inline QString &QString::setNum(ushort n, int base)
1225{ return setNum(qulonglong(n), base); }
1226inline QString &QString::setNum(int n, int base)
1227{ return setNum(qlonglong(n), base); }
1228inline QString &QString::setNum(uint n, int base)
1229{ return setNum(qulonglong(n), base); }
1230inline QString &QString::setNum(long n, int base)
1231{ return setNum(qlonglong(n), base); }
1232inline QString &QString::setNum(ulong n, int base)
1233{ return setNum(qulonglong(n), base); }
1234inline QString &QString::setNum(float n, char f, int prec)
1235{ return setNum(double(n),f,prec); }
1236inline QString QString::arg(int a, int fieldWidth, int base, QChar fillChar) const
1237{ return arg(qlonglong(a), fieldWidth, base, fillChar); }
1238inline QString QString::arg(uint a, int fieldWidth, int base, QChar fillChar) const
1239{ return arg(qulonglong(a), fieldWidth, base, fillChar); }
1240inline QString QString::arg(long a, int fieldWidth, int base, QChar fillChar) const
1241{ return arg(qlonglong(a), fieldWidth, base, fillChar); }
1242inline QString QString::arg(ulong a, int fieldWidth, int base, QChar fillChar) const
1243{ return arg(qulonglong(a), fieldWidth, base, fillChar); }
1244inline QString QString::arg(short a, int fieldWidth, int base, QChar fillChar) const
1245{ return arg(qlonglong(a), fieldWidth, base, fillChar); }
1246inline QString QString::arg(ushort a, int fieldWidth, int base, QChar fillChar) const
1247{ return arg(qulonglong(a), fieldWidth, base, fillChar); }
1248
1249inline QString QString::section(QChar asep, qsizetype astart, qsizetype aend, SectionFlags aflags) const
1250{ return section(QString(asep), astart, aend, aflags); }
1251
1252QT_WARNING_PUSH
1253QT_WARNING_DISABLE_MSVC(4127) // "conditional expression is constant"
1254QT_WARNING_DISABLE_INTEL(111) // "statement is unreachable"
1255
1256inline qsizetype QString::toWCharArray(wchar_t *array) const
1257{
1258 return qToStringViewIgnoringNull(*this).toWCharArray(array);
1259}
1260
1261qsizetype QStringView::toWCharArray(wchar_t *array) const
1262{
1263 if (sizeof(wchar_t) == sizeof(QChar)) {
1264 if (auto src = data())
1265 memcpy(array, src, sizeof(QChar) * size());
1266 return size();
1267 } else {
1268 return QString::toUcs4_helper(reinterpret_cast<const ushort *>(data()), size(),
1269 reinterpret_cast<uint *>(array));
1270 }
1271}
1272
1273QT_WARNING_POP
1274
1275inline QString QString::fromWCharArray(const wchar_t *string, qsizetype size)
1276{
1277 return sizeof(wchar_t) == sizeof(QChar) ? fromUtf16(reinterpret_cast<const char16_t *>(string), size)
1278 : fromUcs4(reinterpret_cast<const char32_t *>(string), size);
1279}
1280
1281inline constexpr QString::QString() noexcept {}
1282inline QString::~QString() {}
1283
1284inline void QString::reserve(qsizetype asize)
1285{
1286 if (d->needsDetach() || asize >= capacity() - d.freeSpaceAtBegin())
1287 reallocData(qMax(asize, size()), QArrayData::KeepSize);
1288 if (d->constAllocatedCapacity())
1289 d->setFlag(Data::CapacityReserved);
1290}
1291
1292inline void QString::squeeze()
1293{
1294 if (!d.isMutable())
1295 return;
1296 if (d->needsDetach() || size() < capacity())
1297 reallocData(d.size, QArrayData::KeepSize);
1298 if (d->constAllocatedCapacity())
1299 d->clearFlag(Data::CapacityReserved);
1300}
1301
1302inline QString &QString::setUtf16(const ushort *autf16, qsizetype asize)
1303{ return setUnicode(reinterpret_cast<const QChar *>(autf16), asize); }
1304inline QChar &QString::operator[](qsizetype i)
1305{ Q_ASSERT(i >= 0 && i < size()); return data()[i]; }
1306inline QChar &QString::front() { return operator[](0); }
1307inline QChar &QString::back() { return operator[](size() - 1); }
1308inline QString::iterator QString::begin()
1309{ detach(); return reinterpret_cast<QChar*>(d.data()); }
1310inline QString::const_iterator QString::begin() const
1311{ return reinterpret_cast<const QChar*>(d.data()); }
1312inline QString::const_iterator QString::cbegin() const
1313{ return reinterpret_cast<const QChar*>(d.data()); }
1314inline QString::const_iterator QString::constBegin() const
1315{ return reinterpret_cast<const QChar*>(d.data()); }
1316inline QString::iterator QString::end()
1317{ detach(); return reinterpret_cast<QChar*>(d.data() + d.size); }
1318inline QString::const_iterator QString::end() const
1319{ return reinterpret_cast<const QChar*>(d.data() + d.size); }
1320inline QString::const_iterator QString::cend() const
1321{ return reinterpret_cast<const QChar*>(d.data() + d.size); }
1322inline QString::const_iterator QString::constEnd() const
1323{ return reinterpret_cast<const QChar*>(d.data() + d.size); }
1324#if QT_STRINGVIEW_LEVEL < 2
1325inline bool QString::contains(const QString &s, Qt::CaseSensitivity cs) const
1326{ return indexOf(s, 0, cs) != -1; }
1327#endif
1328inline bool QString::contains(QLatin1String s, Qt::CaseSensitivity cs) const
1329{ return indexOf(s, 0, cs) != -1; }
1330inline bool QString::contains(QChar c, Qt::CaseSensitivity cs) const
1331{ return indexOf(c, 0, cs) != -1; }
1332inline bool QString::contains(QStringView s, Qt::CaseSensitivity cs) const noexcept
1333{ return indexOf(s, 0, cs) != -1; }
1334
1335#if !defined(QT_NO_CAST_FROM_ASCII) && !defined(QT_RESTRICTED_CAST_FROM_ASCII)
1336inline bool QString::operator==(const char *s) const
1337{ return QString::compare_helper(constData(), size(), s, -1) == 0; }
1338inline bool QString::operator!=(const char *s) const
1339{ return QString::compare_helper(constData(), size(), s, -1) != 0; }
1340inline bool QString::operator<(const char *s) const
1341{ return QString::compare_helper(constData(), size(), s, -1) < 0; }
1342inline bool QString::operator>(const char *s) const
1343{ return QString::compare_helper(constData(), size(), s, -1) > 0; }
1344inline bool QString::operator<=(const char *s) const
1345{ return QString::compare_helper(constData(), size(), s, -1) <= 0; }
1346inline bool QString::operator>=(const char *s) const
1347{ return QString::compare_helper(constData(), size(), s, -1) >= 0; }
1348
1349QT_ASCII_CAST_WARN inline bool QLatin1String::operator==(const char *s) const
1350{ return QString::fromUtf8(s) == *this; }
1351QT_ASCII_CAST_WARN inline bool QLatin1String::operator!=(const char *s) const
1352{ return QString::fromUtf8(s) != *this; }
1353QT_ASCII_CAST_WARN inline bool QLatin1String::operator<(const char *s) const
1354{ return QString::fromUtf8(s) > *this; }
1355QT_ASCII_CAST_WARN inline bool QLatin1String::operator>(const char *s) const
1356{ return QString::fromUtf8(s) < *this; }
1357QT_ASCII_CAST_WARN inline bool QLatin1String::operator<=(const char *s) const
1358{ return QString::fromUtf8(s) >= *this; }
1359QT_ASCII_CAST_WARN inline bool QLatin1String::operator>=(const char *s) const
1360{ return QString::fromUtf8(s) <= *this; }
1361
1362QT_ASCII_CAST_WARN inline bool QLatin1String::operator==(const QByteArray &s) const
1363{ return QString::fromUtf8(s) == *this; }
1364QT_ASCII_CAST_WARN inline bool QLatin1String::operator!=(const QByteArray &s) const
1365{ return QString::fromUtf8(s) != *this; }
1366QT_ASCII_CAST_WARN inline bool QLatin1String::operator<(const QByteArray &s) const
1367{ return QString::fromUtf8(s) > *this; }
1368QT_ASCII_CAST_WARN inline bool QLatin1String::operator>(const QByteArray &s) const
1369{ return QString::fromUtf8(s) < *this; }
1370QT_ASCII_CAST_WARN inline bool QLatin1String::operator<=(const QByteArray &s) const
1371{ return QString::fromUtf8(s) >= *this; }
1372QT_ASCII_CAST_WARN inline bool QLatin1String::operator>=(const QByteArray &s) const
1373{ return QString::fromUtf8(s) <= *this; }
1374
1375inline int QLatin1String::compare_helper(const QLatin1String &s1, const char *s2)
1376{
1377 return QString::compare(s1, QString::fromUtf8(s2));
1378}
1379
1380QT_ASCII_CAST_WARN inline bool QString::operator==(const QByteArray &s) const
1381{ return QString::compare_helper(constData(), size(), s.constData(), s.size()) == 0; }
1382QT_ASCII_CAST_WARN inline bool QString::operator!=(const QByteArray &s) const
1383{ return QString::compare_helper(constData(), size(), s.constData(), s.size()) != 0; }
1384QT_ASCII_CAST_WARN inline bool QString::operator<(const QByteArray &s) const
1385{ return QString::compare_helper(constData(), size(), s.constData(), s.size()) < 0; }
1386QT_ASCII_CAST_WARN inline bool QString::operator>(const QByteArray &s) const
1387{ return QString::compare_helper(constData(), size(), s.constData(), s.size()) > 0; }
1388QT_ASCII_CAST_WARN inline bool QString::operator<=(const QByteArray &s) const
1389{ return QString::compare_helper(constData(), size(), s.constData(), s.size()) <= 0; }
1390QT_ASCII_CAST_WARN inline bool QString::operator>=(const QByteArray &s) const
1391{ return QString::compare_helper(constData(), size(), s.constData(), s.size()) >= 0; }
1392
1393inline bool QByteArray::operator==(const QString &s) const
1394{ return QString::compare_helper(s.constData(), s.size(), constData(), qstrnlen(constData(), size())) == 0; }
1395inline bool QByteArray::operator!=(const QString &s) const
1396{ return QString::compare_helper(s.constData(), s.size(), constData(), qstrnlen(constData(), size())) != 0; }
1397inline bool QByteArray::operator<(const QString &s) const
1398{ return QString::compare_helper(s.constData(), s.size(), constData(), size()) > 0; }
1399inline bool QByteArray::operator>(const QString &s) const
1400{ return QString::compare_helper(s.constData(), s.size(), constData(), size()) < 0; }
1401inline bool QByteArray::operator<=(const QString &s) const
1402{ return QString::compare_helper(s.constData(), s.size(), constData(), size()) >= 0; }
1403inline bool QByteArray::operator>=(const QString &s) const
1404{ return QString::compare_helper(s.constData(), s.size(), constData(), size()) <= 0; }
1405#endif // !defined(QT_NO_CAST_FROM_ASCII) && !defined(QT_RESTRICTED_CAST_FROM_ASCII)
1406
1407#if !defined(QT_USE_FAST_OPERATOR_PLUS) && !defined(QT_USE_QSTRINGBUILDER)
1408inline const QString operator+(const QString &s1, const QString &s2)
1409{ QString t(s1); t += s2; return t; }
1410inline const QString operator+(const QString &s1, QChar s2)
1411{ QString t(s1); t += s2; return t; }
1412inline const QString operator+(QChar s1, const QString &s2)
1413{ QString t(s1); t += s2; return t; }
1414# if !defined(QT_NO_CAST_FROM_ASCII) && !defined(QT_RESTRICTED_CAST_FROM_ASCII)
1415QT_ASCII_CAST_WARN inline const QString operator+(const QString &s1, const char *s2)
1416{ QString t(s1); t += QString::fromUtf8(s2); return t; }
1417QT_ASCII_CAST_WARN inline const QString operator+(const char *s1, const QString &s2)
1418{ QString t = QString::fromUtf8(s1); t += s2; return t; }
1419QT_ASCII_CAST_WARN inline const QString operator+(const QByteArray &ba, const QString &s)
1420{ QString t = QString::fromUtf8(ba); t += s; return t; }
1421QT_ASCII_CAST_WARN inline const QString operator+(const QString &s, const QByteArray &ba)
1422{ QString t(s); t += QString::fromUtf8(ba); return t; }
1423# endif // QT_NO_CAST_FROM_ASCII
1424#endif // QT_USE_QSTRINGBUILDER
1425
1426inline std::string QString::toStdString() const
1427{ return toUtf8().toStdString(); }
1428
1429inline QString QString::fromStdString(const std::string &s)
1430{ return fromUtf8(s.data(), int(s.size())); }
1431
1432inline std::wstring QString::toStdWString() const
1433{
1434 std::wstring str;
1435 str.resize(length());
1436#if __cplusplus >= 201703L
1437 str.resize(toWCharArray(str.data()));
1438#else
1439 if (length())
1440 str.resize(toWCharArray(&str.front()));
1441#endif
1442 return str;
1443}
1444
1445inline QString QString::fromStdWString(const std::wstring &s)
1446{ return fromWCharArray(s.data(), int(s.size())); }
1447
1448inline QString QString::fromStdU16String(const std::u16string &s)
1449{ return fromUtf16(s.data(), int(s.size())); }
1450
1451inline std::u16string QString::toStdU16String() const
1452{ return std::u16string(reinterpret_cast<const char16_t*>(utf16()), length()); }
1453
1454inline QString QString::fromStdU32String(const std::u32string &s)
1455{ return fromUcs4(s.data(), int(s.size())); }
1456
1457inline std::u32string QString::toStdU32String() const
1458{
1459 std::u32string u32str(length(), char32_t(0));
1460 qsizetype len = toUcs4_helper(reinterpret_cast<const ushort *>(constData()),
1461 length(), reinterpret_cast<uint*>(&u32str[0]));
1462 u32str.resize(len);
1463 return u32str;
1464}
1465
1466#if !defined(QT_NO_DATASTREAM) || defined(QT_BOOTSTRAPPED)
1467Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QString &);
1468Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QString &);
1469#endif
1470
1471Q_DECLARE_SHARED(QString)
1472Q_DECLARE_OPERATORS_FOR_FLAGS(QString::SectionFlags)
1473
1474inline int QString::compare(QStringView s, Qt::CaseSensitivity cs) const noexcept
1475{ return -s.compare(*this, cs); }
1476
1477inline int QString::localeAwareCompare(QStringView s) const
1478{ return localeAwareCompare_helper(constData(), length(), s.constData(), s.length()); }
1479inline int QString::localeAwareCompare(QStringView s1, QStringView s2)
1480{ return localeAwareCompare_helper(s1.constData(), s1.length(), s2.constData(), s2.length()); }
1481
1482namespace QtPrivate {
1483// used by qPrintable() and qUtf8Printable() macros
1484inline const QString &asString(const QString &s) { return s; }
1485inline QString &&asString(QString &&s) { return std::move(s); }
1486}
1487
1488//
1489// QStringView::arg() implementation
1490//
1491
1492namespace QtPrivate {
1493
1494struct ArgBase {
1495 enum Tag : uchar { L1, U8, U16 } tag;
1496};
1497
1498struct QStringViewArg : ArgBase {
1499 QStringView string;
1500 QStringViewArg() = default;
1501 constexpr explicit QStringViewArg(QStringView v) noexcept : ArgBase{U16}, string{v} {}
1502};
1503
1504struct QLatin1StringArg : ArgBase {
1505 QLatin1String string;
1506 QLatin1StringArg() = default;
1507 constexpr explicit QLatin1StringArg(QLatin1String v) noexcept : ArgBase{L1}, string{v} {}
1508};
1509
1510[[nodiscard]] Q_CORE_EXPORT QString argToQString(QStringView pattern, size_t n, const ArgBase **args);
1511[[nodiscard]] Q_CORE_EXPORT QString argToQString(QLatin1String pattern, size_t n, const ArgBase **args);
1512
1513template <typename StringView, typename...Args>
1514[[nodiscard]] Q_ALWAYS_INLINE QString argToQStringDispatch(StringView pattern, const Args &...args)
1515{
1516 const ArgBase *argBases[] = {&args..., /* avoid zero-sized array */ nullptr};
1517 return QtPrivate::argToQString(pattern, sizeof...(Args), argBases);
1518}
1519
1520 inline QStringViewArg qStringLikeToArg(const QString &s) noexcept { return QStringViewArg{qToStringViewIgnoringNull(s)}; }
1521constexpr inline QStringViewArg qStringLikeToArg(QStringView s) noexcept { return QStringViewArg{s}; }
1522 inline QStringViewArg qStringLikeToArg(const QChar &c) noexcept { return QStringViewArg{QStringView{&c, 1}}; }
1523constexpr inline QLatin1StringArg qStringLikeToArg(QLatin1String s) noexcept { return QLatin1StringArg{s}; }
1524
1525} // namespace QtPrivate
1526
1527template <typename...Args>
1528Q_ALWAYS_INLINE
1529QString QStringView::arg(Args &&...args) const
1530{
1531 return QtPrivate::argToQStringDispatch(*this, QtPrivate::qStringLikeToArg(args)...);
1532}
1533
1534template <typename...Args>
1535Q_ALWAYS_INLINE
1536QString QLatin1String::arg(Args &&...args) const
1537{
1538 return QtPrivate::argToQStringDispatch(*this, QtPrivate::qStringLikeToArg(args)...);
1539}
1540
1541template <typename T>
1542qsizetype erase(QString &s, const T &t)
1543{
1544 return QtPrivate::sequential_erase(s, t);
1545}
1546
1547template <typename Predicate>
1548qsizetype erase_if(QString &s, Predicate pred)
1549{
1550 return QtPrivate::sequential_erase_if(s, pred);
1551}
1552
1553inline namespace QtLiterals {
1554inline QString operator"" _qs(const char16_t *str, size_t size) noexcept
1555{
1556 return QString(QStringPrivate(nullptr, const_cast<char16_t *>(str), qsizetype(size)));
1557}
1558} // QtLiterals
1559
1560QT_END_NAMESPACE
1561
1562#if defined(QT_USE_FAST_OPERATOR_PLUS) || defined(QT_USE_QSTRINGBUILDER)
1563#include <QtCore/qstringbuilder.h>
1564#endif
1565
1566#endif // QSTRING_H
1567