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cb696eff08
If the caller wants to use the binding index for anything, if there is such a thing, it can now be obtained via an optional out-parameter.
68 lines
2.5 KiB
C++
68 lines
2.5 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(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 Environment : 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 bool has_this_binding() const { return false; }
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virtual Value get_this_binding(GlobalObject&) const { return {}; }
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virtual Object* with_base_object() const { return nullptr; }
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virtual bool has_binding([[maybe_unused]] FlyString const& name, [[maybe_unused]] Optional<size_t>* out_index = nullptr) 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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Environment* outer_environment() { return m_outer_environment; }
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Environment const* outer_environment() const { return m_outer_environment; }
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virtual bool is_global_environment() const { return false; }
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virtual bool is_declarative_environment() const { return false; }
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virtual bool is_function_environment() 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 "Environment"; }
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protected:
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explicit Environment(Environment* parent);
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virtual void visit_edges(Visitor&) override;
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private:
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virtual bool is_environment() const final { return true; }
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GlobalObject* m_global_object { nullptr };
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Environment* m_outer_environment { nullptr };
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};
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}
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