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diff --git a/examples/widgets/richtext/syntaxhighlighter/highlighter.cpp b/examples/widgets/richtext/syntaxhighlighter/highlighter.cpp
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+++ b/examples/widgets/richtext/syntaxhighlighter/highlighter.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtWidgets>
+
+#include "highlighter.h"
+
+//! [0]
+Highlighter::Highlighter(QTextDocument *parent)
+    : QSyntaxHighlighter(parent)
+{
+    HighlightingRule rule;
+
+    keywordFormat.setForeground(Qt::darkBlue);
+    keywordFormat.setFontWeight(QFont::Bold);
+    QStringList keywordPatterns;
+    keywordPatterns << "\\bchar\\b" << "\\bclass\\b" << "\\bconst\\b"
+                    << "\\bdouble\\b" << "\\benum\\b" << "\\bexplicit\\b"
+                    << "\\bfriend\\b" << "\\binline\\b" << "\\bint\\b"
+                    << "\\blong\\b" << "\\bnamespace\\b" << "\\boperator\\b"
+                    << "\\bprivate\\b" << "\\bprotected\\b" << "\\bpublic\\b"
+                    << "\\bshort\\b" << "\\bsignals\\b" << "\\bsigned\\b"
+                    << "\\bslots\\b" << "\\bstatic\\b" << "\\bstruct\\b"
+                    << "\\btemplate\\b" << "\\btypedef\\b" << "\\btypename\\b"
+                    << "\\bunion\\b" << "\\bunsigned\\b" << "\\bvirtual\\b"
+                    << "\\bvoid\\b" << "\\bvolatile\\b";
+    foreach (const QString &pattern, keywordPatterns) {
+        rule.pattern = QRegExp(pattern);
+        rule.format = keywordFormat;
+        highlightingRules.append(rule);
+//! [0] //! [1]
+    }
+//! [1]
+
+//! [2]
+    classFormat.setFontWeight(QFont::Bold);
+    classFormat.setForeground(Qt::darkMagenta);
+    rule.pattern = QRegExp("\\bQ[A-Za-z]+\\b");
+    rule.format = classFormat;
+    highlightingRules.append(rule);
+//! [2]
+
+//! [3]
+    singleLineCommentFormat.setForeground(Qt::red);
+    rule.pattern = QRegExp("//[^\n]*");
+    rule.format = singleLineCommentFormat;
+    highlightingRules.append(rule);
+
+    multiLineCommentFormat.setForeground(Qt::red);
+//! [3]
+
+//! [4]
+    quotationFormat.setForeground(Qt::darkGreen);
+    rule.pattern = QRegExp("\".*\"");
+    rule.format = quotationFormat;
+    highlightingRules.append(rule);
+//! [4]
+
+//! [5]
+    functionFormat.setFontItalic(true);
+    functionFormat.setForeground(Qt::blue);
+    rule.pattern = QRegExp("\\b[A-Za-z0-9_]+(?=\\()");
+    rule.format = functionFormat;
+    highlightingRules.append(rule);
+//! [5]
+
+//! [6]
+    commentStartExpression = QRegExp("/\\*");
+    commentEndExpression = QRegExp("\\*/");
+}
+//! [6]
+
+//! [7]
+void Highlighter::highlightBlock(const QString &text)
+{
+    foreach (const HighlightingRule &rule, highlightingRules) {
+        QRegExp expression(rule.pattern);
+        int index = expression.indexIn(text);
+        while (index >= 0) {
+            int length = expression.matchedLength();
+            setFormat(index, length, rule.format);
+            index = expression.indexIn(text, index + length);
+        }
+    }
+//! [7] //! [8]
+    setCurrentBlockState(0);
+//! [8]
+
+//! [9]
+    int startIndex = 0;
+    if (previousBlockState() != 1)
+        startIndex = commentStartExpression.indexIn(text);
+
+//! [9] //! [10]
+    while (startIndex >= 0) {
+//! [10] //! [11]
+        int endIndex = commentEndExpression.indexIn(text, startIndex);
+        int commentLength;
+        if (endIndex == -1) {
+            setCurrentBlockState(1);
+            commentLength = text.length() - startIndex;
+        } else {
+            commentLength = endIndex - startIndex
+                            + commentEndExpression.matchedLength();
+        }
+        setFormat(startIndex, commentLength, multiLineCommentFormat);
+        startIndex = commentStartExpression.indexIn(text, startIndex + commentLength);
+    }
+}
+//! [11]