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/ArgumentsObject.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2021, Andreas Kling <andreas@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibJS/Runtime/Completion.h>
+#include <LibJS/Runtime/Environment.h>
+#include <LibJS/Runtime/Object.h>
+
+namespace JS {
+
+class ArgumentsObject final : public Object {
+    JS_OBJECT(ArgumentsObject, Object);
+    JS_DECLARE_ALLOCATOR(ArgumentsObject);
+
+public:
+    virtual void initialize(Realm&) override;
+    virtual ~ArgumentsObject() override = default;
+
+    Environment& environment() { return m_environment; }
+
+    virtual ThrowCompletionOr<Optional<PropertyDescriptor>> internal_get_own_property(PropertyKey const&) const override;
+    virtual ThrowCompletionOr<bool> internal_define_own_property(PropertyKey const&, PropertyDescriptor const&, Optional<PropertyDescriptor>* precomputed_get_own_property = nullptr) override;
+    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const&, Value receiver, CacheablePropertyMetadata*, PropertyLookupPhase) const override;
+    virtual ThrowCompletionOr<bool> internal_set(PropertyKey const&, Value value, Value receiver, CacheablePropertyMetadata*) override;
+    virtual ThrowCompletionOr<bool> internal_delete(PropertyKey const&) override;
+
+    // [[ParameterMap]]
+    Object& parameter_map() { return *m_parameter_map; }
+
+private:
+    ArgumentsObject(Realm&, Environment&);
+
+    virtual void visit_edges(Cell::Visitor&) override;
+
+    NonnullGCPtr<Environment> m_environment;
+    GCPtr<Object> m_parameter_map;
+};
+
+}