47     // 6. Let position be the value of the [[StringIteratorNextIndex]] internal slot of O.  in Next()
48     uint32_t position = thisValue.GetObject<JSStringIterator>()->GetStringIteratorNextIndex();  in Next()  local
52     // If position ≥ len, then  in Next()
55     if (position >= len) {  in Next()
61     // 9. Let first be the code unit value at index position in s.  in Next()
62     uint16_t first = EcmaStringAccessor(string.GetObject<EcmaString>()).Get<false>(position);  in Next()
65 …// 10. If first < 0xD800 or first > 0xDBFF or position+1 = len, let resultString be the string con…  in Next()
68     if (position + 1 == len || first < base::utf_helper::DECODE_LEAD_LOW ||  in Next()
74         // a. Let second be the code unit value at index position+1 in the String S.  in Next()
78 …     uint16_t second = EcmaStringAccessor(string.GetObject<EcmaString>()).Get<false>(position + 1);  in Next()
90 …// 13. Set the value of the [[StringIteratorNextIndex]] internal slot of O to position+ resultSize.  in Next()
91     thisValue.GetObject<JSStringIterator>()->SetStringIteratorNextIndex(position + resultSize);  in Next()