QML: Allow named lists of value types

We register QList<T> as sequential container type for any value type T
we get. This way we can always find a type to use for list<t> with t
being a value type. The metatypes are shuffled around so that we have an
easier time associating a type with its list and vice versa.

As QQmlPropertyData's isQList flag denotes both QQmlListProperty<T> and
QList<T> now, we need to use QMetaType::IsQmlList more often.

Conversely, any name given to extra sequential containers registered via
QML_SEQUENTIAL_CONTAINER is explicitly ignored now. As you can do
list<foo> for any type foo now, there is not much of a point in having
further named container registrations for the same type. It would just
make things more complicated. Mind that the name had already been
ignored before, just not explicitly.

[ChangeLog][QtQml] You can now use lists of value types in QML. For
example a property of type list<int> will hold a list of integers.

Task-number: QTBUG-82443
Change-Id: I7bee61cee3963dae5d231bf59f70b8012984371d
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/qml/qml/qqmlpropertyvalidator.cpp b/src/qml/qml/qqmlpropertyvalidator.cpp
index 936f35190c..558a7e87a1 100644
--- a/src/qml/qml/qqmlpropertyvalidator.cpp
+++ b/src/qml/qml/qqmlpropertyvalidator.cpp
@@ -745,7 +745,7 @@ QQmlError QQmlPropertyValidator::validateObjectBinding(QQmlPropertyData *propert
         // We can convert everything to QVariant :)
         return noError;
     } else if (property->isQList()) {
-        const QMetaType listType = QQmlMetaType::listType(property->propType());
+        const QMetaType listType = QQmlMetaType::listValueType(property->propType());
         if (!QQmlMetaType::isInterface(listType)) {
             QQmlRefPointer<QQmlPropertyCache> source = propertyCaches.at(binding->value.objectIndex);
             if (!canCoerce(listType, source)) {