C++: Add source file to test icon support

Task-number: QTCREATORBUG-21867
Change-Id: Ie167608257bb8b7d268a05f1935d77659a075dc1
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

share/qtcreator/cplusplus/examples/CMakeLists.txt

@@ -15,6 +15,7 @@ find_package(Qt5 COMPONENTS Widgets REQUIRED)
 
 add_executable(examples
   clazy_example.cpp
+  icontest.cpp
   tidy_example.cpp
   tidy_example.h
 )

share/qtcreator/cplusplus/examples/examples.pro

@@ -4,6 +4,6 @@ CONFIG+= c++1z
 
 TARGET = examples
 
-SOURCES += clazy_example.cpp tidy_example.cpp
+SOURCES += clazy_example.cpp tidy_example.cpp icontest.cpp
 
 HEADERS += tidy_example.h

share/qtcreator/cplusplus/examples/icontest.cpp

@@ -0,0 +1,90 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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.
+**
+****************************************************************************/
+
+#include <QObject>
+
+#define Macro
+
+class Class {
+    Q_OBJECT
+public:
+    Q_PROPERTY(bool property READ readProperty CONSTANT);
+    void publicFunction();
+    void static publicStaticFunction();
+    template<int> void publicTemplateFunction();
+    template<int> void static publicStaticTemplateFunction();
+
+    int publicVariable;
+    int static publicStaticVariable;
+
+signals:
+    void signal();
+
+public slots:
+    void publicSlot();
+    template<int> void publicTemplateSlot();
+
+protected:
+    void protectedFunction();
+    void static protectedStaticFunction();
+    template<int> void protectedTemplateFunction();
+    template<int> void static protectedStaticTemplateFunction();
+
+    int protectedVariable;
+    int static protectedStaticVariable;
+
+protected slots:
+    void protectedSlot();
+    template<int> void protectedTemplateSlot();
+
+private:
+    void privateFunction();
+    void static privateStaticFunction();
+    // https://bugreports.qt.io/browse/QTCREATORBUG-20761
+    template<int> void privateTemplateFunction();
+    template<int> void static privateStaticTemplateFunction();
+
+private slots:
+    void privateSlot();
+    template<int> void privateTemplateSlot();
+
+    int privateVariable;
+    int static privateStaticVariable;
+};
+
+template <int>
+class TemplateClass{
+};
+
+struct Struct {};
+
+template <int>
+struct TemplateStruct {};
+
+enum Enum {
+    EnumKey
+};
+
+namespace NameSpace {}