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285bc005cb
Before this change each built-in iterator object has a boolean `m_next_method_was_redefined`. If user code later changed the iterator’s prototype (e.g. `Object.setPrototypeOf()`), we still believed the built-in fast-path was safe and skipped the user supplied override, producing wrong results. With this change `BuiltinIterator::as_builtin_iterator_if_next_is_not_redefined()` looks up the current `next` property and verifies that it is still the built-in native function.
41 lines
1 KiB
C++
41 lines
1 KiB
C++
/*
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* Copyright (c) 2021, Idan Horowitz <idan.horowitz@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/Iterator.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibJS/Runtime/Set.h>
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namespace JS {
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class SetIterator final : public Object
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, public BuiltinIterator {
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JS_OBJECT(SetIterator, Object);
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GC_DECLARE_ALLOCATOR(SetIterator);
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public:
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static GC::Ref<SetIterator> create(Realm&, Set& set, Object::PropertyKind iteration_kind);
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virtual ~SetIterator() override = default;
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BuiltinIterator* as_builtin_iterator_if_next_is_not_redefined(IteratorRecord const&) override;
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ThrowCompletionOr<void> next(VM&, bool& done, Value& value) override;
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private:
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friend class SetIteratorPrototype;
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explicit SetIterator(Set& set, Object::PropertyKind iteration_kind, Object& prototype);
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virtual void visit_edges(Cell::Visitor&) override;
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GC::Ref<Set> m_set;
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bool m_done { false };
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Object::PropertyKind m_iteration_kind;
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Map::ConstIterator m_iterator;
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};
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}
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