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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.
39 lines
927 B
C++
39 lines
927 B
C++
/*
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* Copyright (c) 2020, Matthew Olsson <mattco@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/String.h>
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#include <AK/Utf8View.h>
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#include <LibJS/Runtime/Iterator.h>
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#include <LibJS/Runtime/Object.h>
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namespace JS {
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class StringIterator final : public Object
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, public BuiltinIterator {
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JS_OBJECT(StringIterator, Object);
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GC_DECLARE_ALLOCATOR(StringIterator);
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public:
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static GC::Ref<StringIterator> create(Realm&, String string);
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virtual ~StringIterator() 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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explicit StringIterator(String string, Object& prototype);
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friend class StringIteratorPrototype;
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String m_string;
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Utf8CodePointIterator m_iterator;
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bool m_done { false };
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};
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}
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