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/*
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/FlyString.h>
#include <AK/HashMap.h>
#include <LibJS/Runtime/Completion.h>
#include <LibJS/Runtime/Environment.h>
#include <LibJS/Runtime/Value.h>
namespace JS {
class DeclarativeEnvironment : public Environment {
JS_ENVIRONMENT(DeclarativeEnvironment, Environment);
public:
DeclarativeEnvironment();
explicit DeclarativeEnvironment(Environment* parent_scope);
virtual ~DeclarativeEnvironment() override;
virtual ThrowCompletionOr<bool> has_binding(FlyString const& name, Optional<size_t>* = nullptr) const override;
virtual ThrowCompletionOr<void> create_mutable_binding(GlobalObject&, FlyString const& name, bool can_be_deleted) override;
virtual ThrowCompletionOr<void> create_immutable_binding(GlobalObject&, FlyString const& name, bool strict) override;
virtual ThrowCompletionOr<void> initialize_binding(GlobalObject&, FlyString const& name, Value) override;
virtual ThrowCompletionOr<void> set_mutable_binding(GlobalObject&, FlyString const& name, Value, bool strict) override;
virtual ThrowCompletionOr<Value> get_binding_value(GlobalObject&, FlyString const& name, bool strict) override;
virtual ThrowCompletionOr<bool> delete_binding(GlobalObject&, FlyString const& name) override;
void initialize_or_set_mutable_binding(Badge<ScopeNode>, GlobalObject& global_object, FlyString const& name, Value value);
ThrowCompletionOr<void> initialize_or_set_mutable_binding(GlobalObject& global_object, FlyString const& name, Value value);
// This is not a method defined in the spec! Do not use this in any LibJS (or other spec related) code.
[[nodiscard]] Vector<String> bindings() const;
ThrowCompletionOr<Value> get_binding_value_direct(GlobalObject&, size_t index, bool strict);
ThrowCompletionOr<void> set_mutable_binding_direct(GlobalObject&, size_t index, Value, bool strict);
protected:
virtual void visit_edges(Visitor&) override;
private:
FlyString const& name_from_index(size_t) const;
virtual bool is_declarative_environment() const override { return true; }
struct Binding {
Value value;
bool strict { false };
bool mutable_ { false };
bool can_be_deleted { false };
bool initialized { false };
};
HashMap<FlyString, size_t> m_names;
Vector<Binding> m_bindings;
};
template<>
inline bool Environment::fast_is<DeclarativeEnvironment>() const { return is_declarative_environment(); }
}
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