From 9035d1cb2a474a6df52ca395e6c185964ec94de0 Mon Sep 17 00:00:00 2001
From: Ulf Hermann <ulf.hermann@qt.io>
Date: Tue, 17 Jun 2025 14:15:02 +0200
Subject: QmlCompiler: Restore support for writing to temporary arrays
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We use the JavaScript extension as "read" type to signify that the code
generator will accept any type with such an extension. This requires
some adjustments in the type resolver.

Pick-to: 6.10 6.9 6.8 6.5
Task-number: QTBUG-137540
Change-Id: Ia34ca0a24c417c5372852268ba2f55825484639d
Reviewed-by: Olivier De Cannière <olivier.decanniere@qt.io>
---
 tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp')

diff --git a/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp b/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp
index ffd18f09a7..b322f870fa 100644
--- a/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp
+++ b/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp
@@ -288,6 +288,7 @@ private slots:
     void voidFunction();
     void writeBack();
     void writeVariantMap();
+    void writeAndReturnTempArray();
 };
 
 static QByteArray arg1()
@@ -5838,6 +5839,20 @@ void tst_QmlCppCodegen::writeVariantMap()
 
 }
 
+void tst_QmlCppCodegen::writeAndReturnTempArray()
+{
+    QQmlEngine engine;
+    QQmlComponent component(&engine, QUrl(u"qrc:/qt/qml/TestTypes/Categorizer.qml"_s));
+
+    QVERIFY2(component.isReady(), qPrintable(component.errorString()));
+    QScopedPointer<QObject> object(component.create());
+    QVERIFY(!object.isNull());
+
+    const QVariant nnn = object->property("nnn");
+    QCOMPARE(nnn.metaType(), QMetaType::fromType<QList<double>>());
+    QCOMPARE(nnn.value<QList<double>>(), QList<double>{10});
+}
+
 QTEST_MAIN(tst_QmlCppCodegen)
 
 #include "tst_qmlcppcodegen.moc"
-- 
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