Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibJS/Runtime/WeakSet.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/HashTable.h>
+#include <LibJS/Runtime/GlobalObject.h>
+#include <LibJS/Runtime/Object.h>
+#include <LibJS/Runtime/WeakContainer.h>
+
+namespace JS {
+
+class WeakSet final
+    : public Object
+    , public WeakContainer {
+    JS_OBJECT(WeakSet, Object);
+    JS_DECLARE_ALLOCATOR(WeakSet);
+
+public:
+    static NonnullGCPtr<WeakSet> create(Realm&);
+
+    virtual ~WeakSet() override = default;
+
+    HashTable<GCPtr<Cell>> const& values() const { return m_values; }
+    HashTable<GCPtr<Cell>>& values() { return m_values; }
+
+    virtual void remove_dead_cells(Badge<Heap>) override;
+
+private:
+    explicit WeakSet(Object& prototype);
+
+    HashTable<RawGCPtr<Cell>> m_values; // This stores Cell pointers instead of Object pointers to aide with sweeping
+};
+
+}