moc: Error out when detecting unterminated macro usage

Exhausting the symbol list while looking for the
final right parenthesis means it is missing.

Task-number: QTBUG-29308
Change-Id: Iccf5897b0f5eb719699fd12d6c8e4a16ff189d9b
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

3 files changed, 74 insertions, 0 deletions

diff --git a/src/tools/moc/preprocessor.cpp b/src/tools/moc/preprocessor.cpp
index 7430c4a86c..96b920b7cd 100644
--- a/src/tools/moc/preprocessor.cpp
+++ b/src/tools/moc/preprocessor.cpp
@@ -630,6 +630,8 @@ Symbols Preprocessor::macroExpandIdentifier(Preprocessor *that, SymbolStack &sym
 
             if (nesting < 0)
                 break;
+            else if (!symbols.hasNext())
+                that->error("missing ')' in macro usage");
         }
 
         // empty VA_ARGS
diff --git a/tests/auto/tools/moc/tst_moc.cpp b/tests/auto/tools/moc/tst_moc.cpp
index 8d180ce20b..af77e5c3ad 100644
--- a/tests/auto/tools/moc/tst_moc.cpp
+++ b/tests/auto/tools/moc/tst_moc.cpp
@@ -558,6 +558,7 @@ private slots:
     void autoSignalSpyMetaTypeRegistration();
     void parseDefines();
     void preprocessorOnly();
+    void unterminatedFunctionMacro();
 
 signals:
     void sigWithUnsignedArg(unsigned foo);
@@ -2948,6 +2949,26 @@ void tst_Moc::preprocessorOnly()
 #endif
 }
 
+
+void tst_Moc::unterminatedFunctionMacro()
+{
+#ifdef MOC_CROSS_COMPILED
+    QSKIP("Not tested when cross-compiled");
+#endif
+#if defined(Q_OS_LINUX) && defined(Q_CC_GNU) && !defined(QT_NO_PROCESS)
+    QProcess proc;
+    proc.start("moc", QStringList() << "-E" << m_sourceDirectory + QStringLiteral("/unterminated-function-macro.h"));
+    QVERIFY(proc.waitForFinished());
+    QCOMPARE(proc.exitCode(), 1);
+    QCOMPARE(proc.readAllStandardOutput(), QByteArray());
+    QByteArray errorOutput = proc.readAllStandardError();
+    QVERIFY(!errorOutput.isEmpty());
+    QVERIFY(errorOutput.contains("missing ')' in macro usage"));
+#else
+    QSKIP("Only tested on linux/gcc");
+#endif
+}
+
 QTEST_MAIN(tst_Moc)
 
 #include "tst_moc.moc"
diff --git a/tests/auto/tools/moc/unterminated-function-macro.h b/tests/auto/tools/moc/unterminated-function-macro.h
new file mode 100644
index 0000000000..813d60f0e4
--- /dev/null
+++ b/tests/auto/tools/moc/unterminated-function-macro.h
@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+class Dummy : public QObject {
+    Q_OBJECT
+}
+
+#define MACRO(arg) do_something(arg)
+
+static void foo() {
+    MACRO(foo
+}
+