Support top level generator functions

Extends grammar to support generator functions in QML components and
adjusts codegen accordingly

The corresponding test case must be blacklisted in tst_qmlmin, as qmlmin
cannot handle yield statements

Fixes: QTBUG-77096
Change-Id: I47d45dd56289cdf073b41932a585259d3052de04
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 23 insertions, 0 deletions

diff --git a/tests/auto/qml/qqmlecmascript/tst_qqmlecmascript.cpp b/tests/auto/qml/qqmlecmascript/tst_qqmlecmascript.cpp
index 00105c4225..b44fe9766c 100644
--- a/tests/auto/qml/qqmlecmascript/tst_qqmlecmascript.cpp
+++ b/tests/auto/qml/qqmlecmascript/tst_qqmlecmascript.cpp
@@ -233,6 +233,7 @@ private slots:
     void functionAssignment_afterBinding();
     void eval();
     void function();
+    void topLevelGeneratorFunction();
     void qtbug_10696();
     void qtbug_11606();
     void qtbug_11600();
@@ -6348,6 +6349,28 @@ void tst_qqmlecmascript::function()
     delete o;
 }
 
+// QTBUG-77096
+void tst_qqmlecmascript::topLevelGeneratorFunction()
+{
+    QQmlEngine engine;
+    QQmlComponent component(&engine, testFileUrl("generatorFunction.qml"));
+
+    QScopedPointer<QObject> o {component.create()};
+    QVERIFY(o != nullptr);
+
+    // check that generator works correctly in QML
+    QCOMPARE(o->property("test1").toBool(), true);
+    QCOMPARE(o->property("test2").toBool(), true);
+    QCOMPARE(o->property("test3").toBool(), true);
+    QCOMPARE(o->property("done").toBool(), true);
+
+    // check that generator is accessible from C++
+    QVariant returnedValue;
+    QMetaObject::invokeMethod(o.get(), "gen", Q_RETURN_ARG(QVariant, returnedValue));
+    auto it = returnedValue.value<QJSValue>();
+    QCOMPARE(it.property("next").callWithInstance(it).property("value").toInt(), 1);
+}
+
 // Test the "Qt.include" method
 void tst_qqmlecmascript::include()
 {