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https://github.com/RGBCube/serenity
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9ccc2f6c4d
Previously, EnvironmentRecord was a JS::Object. This was done because GlobalObject inherited from EnvironmentRecord. Now that this is no longer the case, we can simplify things by making EnvironmentRecord inherit from Cell directly. This also removes the need for environment records to have a shape, which was awkward. This will be removed in the following patch.
70 lines
2.7 KiB
C++
70 lines
2.7 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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#define JS_ENVIRONMENT_RECORD(class_, base_class) \
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public: \
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using Base = base_class; \
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virtual char const* class_name() const override { return #class_; }
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class EnvironmentRecord : public Cell {
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public:
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GlobalObject& global_object() { return *m_global_object; }
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GlobalObject const& global_object() const { return *m_global_object; }
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virtual void initialize(GlobalObject&) override;
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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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virtual bool has_binding([[maybe_unused]] FlyString const& name) const { return false; }
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virtual void create_mutable_binding(GlobalObject&, [[maybe_unused]] FlyString const& name, [[maybe_unused]] bool can_be_deleted) { }
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virtual void create_immutable_binding(GlobalObject&, [[maybe_unused]] FlyString const& name, [[maybe_unused]] bool strict) { }
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virtual void initialize_binding(GlobalObject&, [[maybe_unused]] FlyString const& name, Value) { }
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virtual void set_mutable_binding(GlobalObject&, [[maybe_unused]] FlyString const& name, Value, [[maybe_unused]] bool strict) { }
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virtual Value get_binding_value(GlobalObject&, [[maybe_unused]] FlyString const& name, [[maybe_unused]] bool strict) { return {}; }
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virtual bool delete_binding(GlobalObject&, [[maybe_unused]] FlyString const& name) { return false; }
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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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virtual bool is_global_environment_record() const { return false; }
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virtual bool is_declarative_environment_record() const { return false; }
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virtual bool is_function_environment_record() const { return false; }
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template<typename T>
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bool fast_is() const = delete;
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virtual char const* class_name() const override { return "EnvironmentRecord"; }
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protected:
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explicit EnvironmentRecord(EnvironmentRecord* parent);
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virtual void visit_edges(Visitor&) override;
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private:
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virtual bool is_environment_record() const final { return true; }
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GlobalObject* m_global_object { nullptr };
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EnvironmentRecord* m_outer_environment { nullptr };
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};
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}
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