From c7cb455a47c42e8e658e3433defee613f8643cd2 Mon Sep 17 00:00:00 2001 From: Giuseppe D'Angelo Date: Mon, 23 Jan 2012 22:47:59 +0000 Subject: QRegularExpression: add QRegularExpression* set of classes Added QRegularExpression, QRegularExpressionMatch and QRegularExpressionMatchIterator as PCRE-enabled, regexp classes. Documentation is included, as well as a first round of autotests. Task-number: QTBUG-23489 Change-Id: Id47031b80602c913ccd2fd740070e3024ea06abc Reviewed-by: Thiago Macieira Reviewed-by: Lars Knoll --- .../files-and-resources/datastreamformat.qdoc | 5 + .../code/src_corelib_tools_qregularexpression.cpp | 289 +++++++++++++++++++++ 2 files changed, 294 insertions(+) create mode 100644 doc/src/snippets/code/src_corelib_tools_qregularexpression.cpp (limited to 'doc') diff --git a/doc/src/network/files-and-resources/datastreamformat.qdoc b/doc/src/network/files-and-resources/datastreamformat.qdoc index 17a0044a69..8ff31371a2 100644 --- a/doc/src/network/files-and-resources/datastreamformat.qdoc +++ b/doc/src/network/files-and-resources/datastreamformat.qdoc @@ -298,6 +298,11 @@ \li Regular expression syntax (quint8) \li Minimal matching (quint8) \endlist + \row \li QRegularExpression + \li \list + \li The regular expression pattern (QString) + \li The pattern options (quint32) + \endlist \row \li QRegion \li \list \li The size of the data, i.e. 8 + 16 * (number of rectangles) (quint32) diff --git a/doc/src/snippets/code/src_corelib_tools_qregularexpression.cpp b/doc/src/snippets/code/src_corelib_tools_qregularexpression.cpp new file mode 100644 index 0000000000..cab89d9c9e --- /dev/null +++ b/doc/src/snippets/code/src_corelib_tools_qregularexpression.cpp @@ -0,0 +1,289 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Giuseppe D'Angelo . +** Contact: http://www.qt-project.org/ +** +** This file is part of the documentation 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] +QRegularExpression re("a pattern"); +//! [0] + + +//! [1] +QRegularExpression re; +re.setPattern("another pattern"); +//! [1] + + +//! [2] +// matches two digits followed by a space and a word +QRegularExpression re("\\d\\d \\w+"); + +// matches a backslash +QRegularExpression re2("\\\\"); +//! [2] + + +//! [3] +QRegularExpression re("a third pattern"); +QString pattern = re.pattern(); // pattern == "a third pattern" +//! [3] + + +//! [4] +// matches "Qt rocks", but also "QT rocks", "QT ROCKS", "qT rOcKs", etc. +QRegularExpression re("Qt rocks", QRegularExpression::CaseInsensitiveOption); +//! [4] + + +//! [5] +QRegularExpression re("^\\d+$"); +re.setPatternOptions(QRegularExpression::MultilineOption); +// re matches any line in the subject string that contains only digits (but at least one) +//! [5] + + +//! [6] +QRegularExpression re = QRegularExpression("^two.*words$", QRegularExpression::MultilineOption + | QRegularExpression::DotMatchesEverythingOption); + +QRegularExpression::PatternOptions options = re.patternOptions(); +// options == QRegularExpression::MultilineOption | QRegularExpression::DotMatchesEverythingOption +//! [6] + + +//! [7] +// match two digits followed by a space and a word +QRegularExpression re("\\d\\d \\w+"); +QRegularExpressionMatch match = re.match("abc123 def"); +bool hasMatch = match.hasMatch(); // true +//! [7] + + +//! [8] +QRegularExpression re("\\d\\d \\w+"); +QRegularExpressionMatch match = re.match("abc123 def"); +if (match.hasMatch()) { + QString matched = match.captured(0); // matched == "23 def" + // ... +} +//! [8] + + +//! [9] +QRegularExpression re("\\d\\d \\w+"); +QRegularExpressionMatch match = re.match("12 abc 45 def", 1); +if (match.hasMatch()) { + QString matched = match.captured(0); // matched == "45 def" + // ... +} +//! [9] + + +//! [10] +QRegularExpression re("^(\\d\\d)/(\\d\\d)/(\\d\\d\\d\\d)$"); +QRegularExpressionMatch match = re.match("08/12/1985"); +if (match.hasMatch()) { + QString day = re.captured(1); // day == "08" + QString month = re.captured(2); // month == "12" + QString year = re.captured(3); // year == "1985" + // ... +} +//! [10] + + +//! [11] +QRegularExpression re("abc(\\d+)def"); +QRegularExpressionMatch match = re.match("XYZabc123defXYZ"); +if (match.hasMatch()) { + int startOffset = re.capturedStart(1); // startOffset == 6 + int endOffset = re.capturedEnd(1); // endOffset == 9 + // ... +} +//! [11] + + +//! [12] +QRegularExpression re("^(?\\d\\d)/(?\\d\\d)/(?\\d\\d\\d\\d)$"); +QRegularExpressionMatch match = re.match("08/12/1985"); +if (match.hasMatch()) { + QString date = match.captured("date"); // date == "08" + QString month = match.captured("month"); // month == "12" + QString year = match.captured("year"); // year == 1985 +} +//! [12] + + +//! [13] +QRegularExpression re("(\\w+)"); +QRegularExpressionMatchIterator i = re.globalMatch("the quick fox"); +//! [13] + + +//! [14] +QStringList words; +while (i.hasNext()) { + QRegularExpressionMatch match = i.next(); + QString word = match.captured(1); + words << word; +} +// words contains "the", "quick", "fox" +//! [14] + + +//! [15] +QString pattern("^(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) \\d\\d?, \\d\\d\\d\\d$"); +QRegularExpression re(pattern); + +QString input("Jan 21,"); +QRegularExpressionMatch match = re.match(input, 0, QRegularExpressionMatch::PartialPreferCompleteMatch); +bool hasMatch = match.hasMatch(); // false +bool hasPartialMatch = match.hasPartialMatch(); // true +//! [15] + + +//! [16] +QString input("Dec 8, 1985"); +QRegularExpressionMatch match = re.match(input, 0, QRegularExpressionMatch::PartialPreferCompleteMatch); +bool hasMatch = match.hasMatch(); // true +bool hasPartialMatch = match.hasPartialMatch(); // false +//! [16] + + +//! [17] +QRegularExpression re("abc\\w+X|def"); +QRegularExpressionMatch match = re.match("abcdef", 0, QRegularExpressionMatch::PartialPreferCompleteMatch); +bool hasMatch = match.hasMatch(); // true +bool hasPartialMatch = match.hasPartialMatch(); // false +QString captured = match.captured(0); // captured == "def" +//! [17] + + +//! [18] +QRegularExpression re("abc\\w+X|defY"); +QRegularExpressionMatch match = re.match("abcdef", 0, QRegularExpressionMatch::PartialPreferCompleteMatch); +bool hasMatch = match.hasMatch(); // false +bool hasPartialMatch = match.hasPartialMatch(); // true +QString captured = match.captured(0); // captured == "abcdef" +//! [18] + + +//! [19] +QRegularExpression re("abc|ab"); +QRegularExpressionMatch match = re.match("ab", 0, QRegularExpressionMatch::PartialPreferFirstMatch); +bool hasMatch = match.hasMatch(); // false +bool hasPartialMatch = match.hasPartialMatch(); // true +//! [19] + + +//! [20] +QRegularExpression re("abc(def)?"); +QRegularExpressionMatch match = re.match("abc", 0, QRegularExpressionMatch::PartialPreferFirstMatch); +bool hasMatch = match.hasMatch(); // false +bool hasPartialMatch = match.hasPartialMatch(); // true +//! [20] + +//! [21] +QRegularExpression re("(abc)*"); +QRegularExpressionMatch match = re.match("abc", 0, QRegularExpressionMatch::PartialPreferFirstMatch); +bool hasMatch = match.hasMatch(); // false +bool hasPartialMatch = match.hasPartialMatch(); // true +//! [21] + +//! [22] +QRegularExpression invalidRe("(unmatched|parenthesis"); +bool isValid = invalidRe.isValid(); // false +//! [22] + +//! [23] +QRegularExpression invalidRe("(unmatched|parenthesis"); +if (!invalidRe.isValid()) { + QString errorString = invalidRe.errorString(); // errorString == "missing )" + int errorOffset = invalidRe.patternErrorOffset(); // errorOffset == 22 + // ... +} +//! [23] + +//! [24] +QRegularExpression re("^this pattern must match exactly$"); +//! [24] + +//! [25] +QString p("a .*|pattern"); +QRegularExpression re("\\A(?:" + p + ")\\z"); // re matches exactly the pattern string p +//! [25] + +//! [26] +QString escaped = QRegularExpression::escape("a(x) = f(x) + g(x)"); +// escaped == "a\\(x\\)\\ \\=\\ f\\(x\\)\\ \\+\\ g\\(x\\)" +//! [26] + +//! [27] +QString pattern = "(" + QRegularExpression::escape(name) + + "|" + QRegularExpression::escape(nickname) + ")"; +QRegularExpression re(pattern); +//! [27] + +//! [28] +QRegularExpressionMatch match = re.match(...); +for (int i = 0; i <= match.lastCapturedIndex(); ++i) { + QString captured = match.captured(i); + // ... +} +//! [28] + +//! [29] +QRegularExpression("(\d\d) (?\w+)"); +QRegularExpressionMatch match = re.match("23 Jordan"); +if (match.hasMatch()) { + QString number = match.captured(1); // first == "23" + QString name = match.captured("name"); // name == "Jordan" +} +//! [29] + +//! [30] +// extracts the words +QRegularExpression re("(\w+)"); +QString subject("the quick fox"); +QRegularExpressionMatchIterator i = re.globalMatch(subject); +while (i.hasNext()) { + QRegularExpressionMatch match = i.next(); + // ... +} +//! [30] + + -- cgit v1.2.3