80170887db
This code is non-conforming and will eventually get cleaned out once we implement proper variable bindings. However, this will aid us in improving other parts of the code right now.
62 lines
2.1 KiB
C++
62 lines
2.1 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 <AK/FlyString.h>
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#include <AK/HashMap.h>
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#include <LibJS/Runtime/Environment.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS {
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class DeclarativeEnvironment : public Environment {
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JS_ENVIRONMENT(DeclarativeEnvironment, Environment);
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public:
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DeclarativeEnvironment();
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explicit DeclarativeEnvironment(Environment* parent_scope);
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DeclarativeEnvironment(HashMap<FlyString, Variable> variables, Environment* parent_scope);
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virtual ~DeclarativeEnvironment() override;
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// ^Environment
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virtual Optional<Variable> get_from_environment(FlyString const&) const override;
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virtual bool put_into_environment(FlyString const&, Variable) override;
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virtual bool delete_from_environment(FlyString const&) override;
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HashMap<FlyString, Variable> const& variables() const { return m_variables; }
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virtual bool has_binding(FlyString const& name) const override;
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virtual void create_mutable_binding(GlobalObject&, FlyString const& name, bool can_be_deleted) override;
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virtual void create_immutable_binding(GlobalObject&, FlyString const& name, bool strict) override;
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virtual void initialize_binding(GlobalObject&, FlyString const& name, Value) override;
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virtual void set_mutable_binding(GlobalObject&, FlyString const& name, Value, bool strict) override;
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virtual Value get_binding_value(GlobalObject&, FlyString const& name, bool strict) override;
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virtual bool delete_binding(GlobalObject&, FlyString const& name) override;
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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() const override { return true; }
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HashMap<FlyString, Variable> m_variables;
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struct Binding {
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Value value;
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bool strict { false };
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bool mutable_ { false };
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bool can_be_deleted { false };
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bool initialized { false };
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};
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HashMap<FlyString, Binding> m_bindings;
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};
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template<>
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inline bool Environment::fast_is<DeclarativeEnvironment>() const { return is_declarative_environment(); }
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}
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