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, 5 insertions, 1 deletions

diff --git a/src/qmlworkerscript/qv4serialize.cpp b/src/qmlworkerscript/qv4serialize.cpp
index 126ebe5e41..b9b4d6aa08 100644
--- a/src/qmlworkerscript/qv4serialize.cpp
+++ b/src/qmlworkerscript/qv4serialize.cpp
@@ -251,7 +251,11 @@ void Serialize::serialize(QByteArray &data, const QV4::Value &v, ExecutionEngine
             }
             reserve(data, sizeof(quint32) + length * sizeof(quint32));
             push(data, valueheader(WorkerSequence, length));
-            serialize(data, QV4::Value::fromInt32(QV4::SequencePrototype::metaTypeForSequence(o)), engine); // sequence type
+
+            // sequence type
+            serialize(data, QV4::Value::fromInt32(
+                          QV4::SequencePrototype::metaTypeForSequence(o).id()), engine);
+
             ScopedValue val(scope);
             for (uint ii = 0; ii < seqLength; ++ii)
                 serialize(data, (val = o->get(ii)), engine); // sequence elements