566a8dfd93
In the Iterator Helpers proposal, we must create a generator object with additional internal slots and behavior differences. GeneratorObject is currently implemented assuming it wraps around an ECMAScriptFunctionObject with generated bytecode. In this proposal, we instead have "Abstract Closure" blocks. So this marks the `execute` method as virtual, to allow the future subclass to essentially just invoke those closures. We will also require mutable access to the [[GeneratorState]] internal slot.
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@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/Bytecode/Interpreter.h>
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#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
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#include <LibJS/Runtime/Object.h>
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namespace JS {
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class GeneratorObject : public Object {
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JS_OBJECT(GeneratorObject, Object);
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public:
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static ThrowCompletionOr<NonnullGCPtr<GeneratorObject>> create(Realm&, Value, ECMAScriptFunctionObject*, ExecutionContext, Bytecode::RegisterWindow);
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virtual ~GeneratorObject() override = default;
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void visit_edges(Cell::Visitor&) override;
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ThrowCompletionOr<Value> resume(VM&, Value value, Optional<StringView> const& generator_brand);
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ThrowCompletionOr<Value> resume_abrupt(VM&, JS::Completion abrupt_completion, Optional<StringView> const& generator_brand);
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enum class GeneratorState {
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SuspendedStart,
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SuspendedYield,
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Executing,
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Completed,
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};
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GeneratorState generator_state() const { return m_generator_state; }
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void set_generator_state(GeneratorState generator_state) { m_generator_state = generator_state; }
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protected:
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GeneratorObject(Realm&, Object& prototype, ExecutionContext, Optional<StringView> generator_brand = {});
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ThrowCompletionOr<GeneratorState> validate(VM&, Optional<StringView> const& generator_brand);
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virtual ThrowCompletionOr<Value> execute(VM&, JS::Completion const& completion);
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private:
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ExecutionContext m_execution_context;
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GCPtr<ECMAScriptFunctionObject> m_generating_function;
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Value m_previous_value;
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Optional<Bytecode::RegisterWindow> m_frame;
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GeneratorState m_generator_state { GeneratorState::SuspendedStart };
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Optional<StringView> m_generator_brand;
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};
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}
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