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https://github.com/RGBCube/serenity
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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. :^)
43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
/*
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* Copyright (c) 2020-2021, 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 <LibJS/Runtime/Object.h>
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namespace JS {
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struct Variable {
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Value value;
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DeclarationKind declaration_kind;
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};
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class EnvironmentRecord : public Object {
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JS_OBJECT(EnvironmentRecord, Object);
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public:
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virtual Optional<Variable> get_from_environment_record(FlyString const&) const = 0;
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virtual void put_into_environment_record(FlyString const&, Variable) = 0;
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virtual bool delete_from_environment_record(FlyString const&) = 0;
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virtual bool has_this_binding() const { return false; }
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virtual Value get_this_binding(GlobalObject&) const { return {}; }
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// [[OuterEnv]]
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EnvironmentRecord* outer_environment() { return m_outer_environment; }
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EnvironmentRecord const* outer_environment() const { return m_outer_environment; }
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protected:
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explicit EnvironmentRecord(EnvironmentRecord* parent);
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explicit EnvironmentRecord(GlobalObjectTag);
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virtual void visit_edges(Visitor&) override;
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private:
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EnvironmentRecord* m_outer_environment { nullptr };
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};
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}
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