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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. :^)
56 lines
1.8 KiB
C++
56 lines
1.8 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 <AK/FlyString.h>
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#include <AK/HashMap.h>
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#include <LibJS/Runtime/EnvironmentRecord.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS {
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class DeclarativeEnvironmentRecord : public EnvironmentRecord {
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JS_OBJECT(DeclarativeEnvironmentRecord, EnvironmentRecord);
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public:
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enum class EnvironmentRecordType {
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Declarative,
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Function,
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Object,
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Module,
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};
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DeclarativeEnvironmentRecord();
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DeclarativeEnvironmentRecord(EnvironmentRecordType);
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explicit DeclarativeEnvironmentRecord(EnvironmentRecord* parent_scope);
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DeclarativeEnvironmentRecord(HashMap<FlyString, Variable> variables, EnvironmentRecord* parent_scope);
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DeclarativeEnvironmentRecord(HashMap<FlyString, Variable> variables, EnvironmentRecord* parent_scope, EnvironmentRecordType);
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virtual ~DeclarativeEnvironmentRecord() override;
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// ^EnvironmentRecord
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virtual Optional<Variable> get_from_environment_record(FlyString const&) const override;
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virtual void put_into_environment_record(FlyString const&, Variable) override;
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virtual bool delete_from_environment_record(FlyString const&) override;
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HashMap<FlyString, Variable> const& variables() const { return m_variables; }
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EnvironmentRecordType type() const { return m_environment_record_type; }
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protected:
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virtual void visit_edges(Visitor&) override;
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private:
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virtual bool is_declarative_environment_record() const override { return true; }
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EnvironmentRecordType m_environment_record_type : 8 { EnvironmentRecordType::Declarative };
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HashMap<FlyString, Variable> m_variables;
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};
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template<>
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inline bool Object::fast_is<DeclarativeEnvironmentRecord>() const { return is_declarative_environment_record(); }
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}
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