aabd82d508
This patch adds FunctionEnvironmentRecord as a subclass of the existing DeclarativeEnvironmentRecord. Things that are specific to function environment records move into there, simplifying the base. Most of the abstract operations related to function environment records are rewritten to match the spec exactly. I also had to implement GetThisEnvironment() and GetSuperConstructor() to keep tests working after the changes, so that's nice as well. :^)
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/String.h>
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#include <LibJS/Runtime/Object.h>
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namespace JS {
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class Function : public Object {
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JS_OBJECT(Function, Object);
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public:
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enum class ConstructorKind {
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Base,
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Derived,
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};
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virtual ~Function();
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virtual void initialize(GlobalObject&) override { }
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virtual Value call() = 0;
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virtual Value construct(Function& new_target) = 0;
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virtual const FlyString& name() const = 0;
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virtual FunctionEnvironmentRecord* create_environment_record() = 0;
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BoundFunction* bind(Value bound_this_value, Vector<Value> arguments);
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Value bound_this() const { return m_bound_this; }
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const Vector<Value>& bound_arguments() const { return m_bound_arguments; }
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Value home_object() const { return m_home_object; }
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void set_home_object(Value home_object) { m_home_object = home_object; }
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ConstructorKind constructor_kind() const { return m_constructor_kind; };
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void set_constructor_kind(ConstructorKind constructor_kind) { m_constructor_kind = constructor_kind; }
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virtual bool is_strict_mode() const { return false; }
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// [[Environment]]
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// The Environment Record that the function was closed over.
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// Used as the outer environment when evaluating the code of the function.
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virtual EnvironmentRecord* environment() { return nullptr; }
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protected:
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virtual void visit_edges(Visitor&) override;
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explicit Function(Object& prototype);
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Function(Value bound_this, Vector<Value> bound_arguments, Object& prototype);
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private:
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virtual bool is_function() const override { return true; }
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Value m_bound_this;
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Vector<Value> m_bound_arguments;
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Value m_home_object;
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ConstructorKind m_constructor_kind = ConstructorKind::Base;
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};
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}
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