moc: Add support for C++17 nested namespaces (N4230)

[ChangeLog][moc] Added Support for C++17 nested namespaces

Change-Id: Ib83fc5bf48f66546fa97b49710582fbf9c984503
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 64 insertions, 0 deletions

diff --git a/tests/auto/tools/moc/cxx17-namespaces.h b/tests/auto/tools/moc/cxx17-namespaces.h
new file mode 100644
index 0000000000..7c9f54d5f3
--- /dev/null
+++ b/tests/auto/tools/moc/cxx17-namespaces.h
@@ -0,0 +1,64 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Olivier Goffart.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CXX17_NAMESPACES_H
+#define CXX11_NAMESPACES_H
+#include <QtCore/QObject>
+
+#if defined(__cpp_nested_namespace_definitions) || defined(Q_MOC_RUN)
+namespace CXX17Namespace::A::B {
+namespace C::D {
+namespace E::F::G { } // don't confuse moc
+#else
+namespace CXX17Namespace { namespace A { namespace B {
+namespace C { namespace D {
+#endif
+
+Q_NAMESPACE
+
+class ClassInNamespace
+{
+    Q_GADGET
+public:
+    enum GadEn { Value = 3 };
+    Q_ENUM(GadEn)
+};
+
+enum NamEn { Value = 4 };
+Q_ENUM_NS(NamEn);
+
+
+#if defined(__cpp_nested_namespace_definitions) || defined(Q_MOC_RUN)
+}
+}
+#else
+} } }
+} }
+#endif
+
+#endif