CppEditor: Expand templates for Qt5 connect conversion

Fixes at least explicit data() calls for templated pointers:

QPointer<QAction> action;
connect(action.data(), SIGNAL(triggered()), this, SLOT(slot()));

Change-Id: I7f76c1f556c0f271936728d611751424969916a7
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/plugins/cppeditor/cppquickfix_test.cpp

@@ -4537,6 +4537,12 @@ void CppEditorPlugin::test_quickfix_ConvertQt4Connect_connectWithinClass_data()
     QTest::newRow("three-args-connect")
             << QByteArray("conne@ct(this, SIGNAL(sigFoo(int)), SLOT(setProp(int)));")
             << QByteArray("connect(this, &TestClass::sigFoo, this, &TestClass::setProp);");
+
+    QTest::newRow("template-value")
+            << QByteArray("Pointer<TestClass> p;\n"
+                          "conne@ct(p.t, SIGNAL(sigFoo(int)), p.t, SLOT(setProp(int)));")
+            << QByteArray("Pointer<TestClass> p;\n"
+                          "connect(p.t, &TestClass::sigFoo, p.t, &TestClass::setProp);");
 }
 
 void CppEditorPlugin::test_quickfix_ConvertQt4Connect_connectWithinClass()
@@ -4545,6 +4551,11 @@ void CppEditorPlugin::test_quickfix_ConvertQt4Connect_connectWithinClass()
     QFETCH(QByteArray, expected);
 
     QByteArray prefix =
+        "template<class T>\n"
+        "struct Pointer\n"
+        "{\n"
+        "    T *t;\n"
+        "};\n"
         "class QObject {};\n"
         "class TestClass : public QObject\n"
         "{\n"

src/plugins/cppeditor/cppquickfixes.cpp

@@ -5592,6 +5592,7 @@ Class *senderOrReceiverClass(const CppQuickFixInterface &interface,
         objectPointerExpression = "this";
 
     TypeOfExpression toe;
+    toe.setExpandTemplates(true);
     toe.init(interface.semanticInfo().doc, interface.snapshot(), context.bindings());
     const QList<LookupItem> objectPointerExpressions = toe(objectPointerExpression,
                                                            objectPointerScope, TypeOfExpression::Preprocess);