LibJS: Add AsyncFromSyncIteratorPrototype and Async-From-Sync instances

Until we have actual iterator records we have to store the sync iterator as the raw object.
Author: https://github.com/davidot Commit: 064c8be627 Pull-request: https://github.com/SerenityOS/serenity/pull/11041 Reviewed-by: https://github.com/linusg
2025-08-28 05:07:35 +00:00 · 2021-11-23 15:01:35 +01:00 · 2021-11-23 15:01:35 +01:00 · 064c8be627 · 2024-07-18 22:57:59 +09:00
commit 064c8be627
parent 0535c1abbd
8 changed files with 311 additions and 0 deletions
--- a/Userland/Libraries/LibJS/Runtime/AsyncFromSyncIterator.h
+++ b/Userland/Libraries/LibJS/Runtime/AsyncFromSyncIterator.h
@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2021, David Tuin <davidot@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibJS/Runtime/Object.h>
+
+namespace JS {
+
+// 27.1.4.3 Properties of Async-from-Sync Iterator Instances, https://tc39.es/ecma262/#sec-properties-of-async-from-sync-iterator-instances
+class AsyncFromSyncIterator final : public Object {
+    JS_OBJECT(AsyncFromSyncIterator, Object);
+
+public:
+    static AsyncFromSyncIterator* create(GlobalObject&, Object* sync_iterator_record);
+
+    explicit AsyncFromSyncIterator(GlobalObject&, Object* sync_iterator_record);
+    virtual void initialize(GlobalObject&) override;
+    virtual ~AsyncFromSyncIterator() override = default;
+
+    void visit_edges(Visitor& visitor) override;
+
+    Object& sync_iterator_record() const { return *m_sync_iterator_record; }
+
+private:
+    Object* m_sync_iterator_record { nullptr }; // [[SyncIteratorRecord]]
+};
+
+}