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LibJS: Implement Wrapped Function Exotic Objects

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This is a new concept from the ShadowRealm API stage 3 proposal:
https://tc39.es/proposal-shadowrealm/#sec-wrapped-function-exotic-objects
This commit is contained in:
Linus Groh 2021-10-13 21:08:48 +01:00
parent d92967406a
commit 50f8755792
7 changed files with 194 additions and 0 deletions
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38
Userland/Libraries/LibJS/Runtime/WrappedFunction.h Normal file
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/*
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibJS/Runtime/FunctionObject.h>
#include <LibJS/Runtime/Realm.h>
namespace JS {
class WrappedFunction final : public FunctionObject {
JS_OBJECT(WrappedFunction, FunctionObject);
public:
static WrappedFunction* create(GlobalObject&, Realm& caller_realm, FunctionObject& target_function);
WrappedFunction(Realm&, FunctionObject&, Object& prototype);
virtual ~WrappedFunction() = default;
virtual ThrowCompletionOr<Value> internal_call(Value this_argument, MarkedValueList arguments_list) override;
// FIXME: Remove this (and stop inventing random internal slots that shouldn't exist, jeez)
virtual FlyString const& name() const override { return m_wrapped_target_function.name(); }
virtual Realm* realm() const override { return &m_realm; }
private:
virtual void visit_edges(Visitor&) override;
// Internal Slots of Wrapped Function Exotic Objects, https://tc39.es/proposal-shadowrealm/#table-internal-slots-of-wrapped-function-exotic-objects
FunctionObject& m_wrapped_target_function; // [[WrappedTargetFunction]]
Realm& m_realm; // [[Realm]]
};
}