Fix syntax error when trying to declare read-only object properties

The grammar did not allow for the declaration of

    readonly property QtObject foo: QtObject { ... }

and it required a workaround through an alias:

    readonly property alias foo: _foo
    property QtObject _foo: QtObject { ... }

This was merely a glitch in the grammar, I see no reason not to support this.
The semantics are like a const pointer in C++, the property itself is read-only
but the object pointed to has per-property defined read/write semantics.

Task-number: QTBUG-41971
Change-Id: I99e2e7ed58731e387a38e46ec39922d280a21ceb
Reviewed-by: Michael Brasser <michael.brasser@live.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/auto/qml/qqmllanguage/data/readonlyObjectProperty.qml b/tests/auto/qml/qqmllanguage/data/readonlyObjectProperty.qml
new file mode 100644
index 0000000000..3fc332f565
--- /dev/null
+++ b/tests/auto/qml/qqmllanguage/data/readonlyObjectProperty.qml
@@ -0,0 +1,7 @@
+import QtQml 2.0
+
+QtObject {
+    readonly property QtObject subObject: QtObject {
+        property int readWrite: 42
+    }
+}