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/Set.h

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibJS/Runtime/GlobalObject.h>
+#include <LibJS/Runtime/Map.h>
+#include <LibJS/Runtime/Object.h>
+#include <LibJS/Runtime/Value.h>
+
+namespace JS {
+
+class Set : public Object {
+    JS_OBJECT(Set, Object);
+    JS_DECLARE_ALLOCATOR(Set);
+
+public:
+    static NonnullGCPtr<Set> create(Realm&);
+
+    virtual void initialize(Realm&) override;
+    virtual ~Set() override = default;
+
+    // NOTE: Unlike what the spec says, we implement Sets using an underlying map,
+    //       so all the functions below do not directly implement the operations as
+    //       defined by the specification.
+
+    void set_clear() { m_values->map_clear(); }
+    bool set_remove(Value const& value) { return m_values->map_remove(value); }
+    bool set_has(Value const& key) const { return m_values->map_has(key); }
+    void set_add(Value const& key) { m_values->map_set(key, js_undefined()); }
+    size_t set_size() const { return m_values->map_size(); }
+
+    auto begin() const { return const_cast<Map const&>(*m_values).begin(); }
+    auto begin() { return m_values->begin(); }
+    auto end() const { return m_values->end(); }
+
+    NonnullGCPtr<Set> copy() const;
+
+private:
+    explicit Set(Object& prototype);
+
+    virtual void visit_edges(Visitor& visitor) override;
+
+    GCPtr<Map> m_values;
+};
+
+// 24.2.1.1 Set Records, https://tc39.es/ecma262/#sec-set-records
+struct SetRecord {
+    NonnullGCPtr<Object const> set_object; // [[SetObject]]
+    double size { 0 };                     // [[Size]
+    NonnullGCPtr<FunctionObject> has;      // [[Has]]
+    NonnullGCPtr<FunctionObject> keys;     // [[Keys]]
+};
+
+ThrowCompletionOr<SetRecord> get_set_record(VM&, Value);
+bool set_data_has(NonnullGCPtr<Set>, Value);
+
+}