1 files changed, 89 insertions, 0 deletions
diff --git a/doc/global/snippets/code/doc_src_port_from_qregexp.cpp b/doc/global/snippets/code/doc_src_port_from_qregexp.cpp
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index 0000000000..4f953418d9
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+++ b/doc/global/snippets/code/doc_src_port_from_qregexp.cpp
@@ -0,0 +1,89 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 Giuseppe D'Angelo <dangelog@gmail.com>.
+** Copyright (C) 2022 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
+** Copyright (C) 2022 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+QString p("a .*|pattern");
+
+// re matches exactly the pattern string p
+QRegularExpression re(QRegularExpression::anchoredPattern(p));
+//! [0]
+
+//! [1]
+QString subject("the quick fox");
+
+int offset = 0;
+QRegExp re("(\\w+)");
+while ((offset = re.indexIn(subject, offset)) != -1) {
+    offset += re.matchedLength();
+    // ...
+}
+//! [1]
+
+//! [2]
+QString subject("the quick fox");
+
+QRegularExpression re("(\\w+)");
+QRegularExpressionMatchIterator i = re.globalMatch(subject);
+while (i.hasNext()) {
+    QRegularExpressionMatch match = i.next();
+    // ...
+}
+//! [2]
+
+//! [3]
+QRegExp wildcard("*.txt");
+wildcard.setPatternSyntax(QRegExp::Wildcard);
+//! [3]
+
+//! [4]
+auto wildcard = QRegularExpression(QRegularExpression::wildcardToRegularExpression("*.txt"));
+//! [4]
+
+//! [5]
+const QString fp1("C:/Users/dummy/files/content.txt");
+const QString fp2("/home/dummy/files/content.txt");
+
+QRegExp re1("*/files/*");
+re1.setPatternSyntax(QRegExp::Wildcard);
+re1.exactMatch(fp1); // returns true
+re1.exactMatch(fp2); // returns true
+
+// but converted with QRegularExpression::wildcardToRegularExpression()
+
+QRegularExpression re2(QRegularExpression::wildcardToRegularExpression("*/files/*"));
+re2.match(fp1).hasMatch(); // returns false
+re2.match(fp2).hasMatch(); // returns false
+//! [5]
+
+//! [6]
+QRegularExpression re3(QRegularExpression::wildcardToRegularExpression(
+                           "*/files/*", QRegularExpression::UnanchoredWildcardConversion));
+re3.match(fp1).hasMatch(); // returns true
+re3.match(fp2).hasMatch(); // returns true
+//! [6]