QmlCompiler: Reject calls to one of multiple fuzzy overloads

If we cannot statically determine the right overload better don't call
any of them for now. Also, allow attempts to pass arguments as derived
types during type propagation.

The test shows that we don't properly pass the thisObject when calling
with metatypes. Fix that, too.

Pick-to: 6.6 6.5 6.2
Fixes: QTBUG-117922
Change-Id: I02e70ffb9a05f3cfedccafde6e16170b0efbcd29
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

3 files changed, 6 insertions, 0 deletions

diff --git a/tests/auto/qml/qmlcppcodegen/data/childobject.qml b/tests/auto/qml/qmlcppcodegen/data/childobject.qml
index 7d73e4fd7f..db6b910ec2 100644
--- a/tests/auto/qml/qmlcppcodegen/data/childobject.qml
+++ b/tests/auto/qml/qmlcppcodegen/data/childobject.qml
@@ -8,6 +8,7 @@ QtObject {
         function doString() { overloaded("string"); }
         function doNumber() { overloaded(5.2); }
         function doArray() { overloaded({a: 2, b: 3, c: 3}); }
+        function doFoo() { foo(this); }
     }
     objectName: child.objectName
     property int doneThing: child.doThing()
diff --git a/tests/auto/qml/qmlcppcodegen/data/objectwithmethod.h b/tests/auto/qml/qmlcppcodegen/data/objectwithmethod.h
index 3ecb6d398b..ee01d2a0d2 100644
--- a/tests/auto/qml/qmlcppcodegen/data/objectwithmethod.h
+++ b/tests/auto/qml/qmlcppcodegen/data/objectwithmethod.h
@@ -32,6 +32,9 @@ public:
     Q_INVOKABLE void overloaded(QQmlV4Function *) { setObjectName(QStringLiteral("javaScript")); }
     Q_INVOKABLE void overloaded(double) { setObjectName(QStringLiteral("double")); }
     Q_INVOKABLE void overloaded(const QString &) { setObjectName(QStringLiteral("string")); }
+
+    Q_INVOKABLE void foo(const QString &bla) { setObjectName(bla); }
+    Q_INVOKABLE void foo(ObjectWithMethod *) { setObjectName(QStringLiteral("ObjectWithMethod")); }
 };
 
 class OverriddenObjectName : public ObjectWithMethod
diff --git a/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp b/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp
index 3496ca25dd..486a777fef 100644
--- a/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp
+++ b/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp
@@ -3341,6 +3341,8 @@ void tst_QmlCppCodegen::overriddenProperty()
     QCOMPARE(child->objectName(), u"double"_s);
     QMetaObject::invokeMethod(child, "doArray");
     QCOMPARE(child->objectName(), u"javaScript"_s);
+    QMetaObject::invokeMethod(child, "doFoo");
+    QCOMPARE(child->objectName(), u"ObjectWithMethod"_s);
 
     ObjectWithMethod *benign = new ObjectWithMethod(object.data());
     benign->theThing = 10;