49     // 6. Let position be the value of the [[StringIteratorNextIndex]] internal slot of O.  in NextInternal()
50     uint32_t position = thisValue.GetObject<JSStringIterator>()->GetStringIteratorNextIndex();  in NextInternal()  local
54     // If position ≥ len, then  in NextInternal()
57     if (position >= len) {  in NextInternal()
63     // 9. Let first be the code unit value at index position in s.  in NextInternal()
64 …  uint16_t first = EcmaStringAccessor(string.GetObject<EcmaString>()).Get<false>(thread, position);  in NextInternal()
67 …// 10. If first < 0xD800 or first > 0xDBFF or position+1 = len, let resultString be the string con…  in NextInternal()
70     if (position + 1 == len || first < common::utf_helper::DECODE_LEAD_LOW ||  in NextInternal()
81         // a. Let second be the code unit value at index position+1 in the String S.  in NextInternal()
85 …t16_t second = EcmaStringAccessor(string.GetObject<EcmaString>()).Get<false>(thread, position + 1);  in NextInternal()
97 …// 13. Set the value of the [[StringIteratorNextIndex]] internal slot of O to position+ resultSize.  in NextInternal()
98     thisValue.GetObject<JSStringIterator>()->SetStringIteratorNextIndex(position + resultSize);  in NextInternal()