22   std::optional<int> remaining;  in EditBOZInput()  local
23   std::optional<char32_t> next{io.PrepareInput(edit, remaining)};  in EditBOZInput()
26       next = io.NextInField(remaining, edit);  in EditBOZInput()
32   for (; next; next = io.NextInField(remaining, edit)) {  in EditBOZInput()
58   remaining.reset();  in EditBOZInput()
69     char32_t ch{*io.NextInField(remaining, edit)};  in EditBOZInput()
101     std::optional<char32_t> &next, std::optional<int> &remaining) {  in ScanNumericPrefix()  argument
102   next = io.PrepareInput(edit, remaining);  in ScanNumericPrefix()
107       io.SkipSpaces(remaining);  in ScanNumericPrefix()
108       next = io.NextInField(remaining, edit);  in ScanNumericPrefix()
140   std::optional<int> remaining;  in EditIntegerInput()  local
142   bool negate{ScanNumericPrefix(io, edit, next, remaining)};  in EditIntegerInput()
146   for (; next; next = io.NextInField(remaining, edit)) {  in EditIntegerInput()
198   std::optional<int> remaining;  in ScanRealInput()  local
208   if (ScanNumericPrefix(io, edit, next, remaining)) {  in ScanRealInput()
213     remaining.reset();  in ScanRealInput()
226          next = io.NextInField(remaining, edit)) {  in ScanRealInput()
237         next = io.NextInField(remaining, edit);  in ScanRealInput()
256     for (; next; next = io.NextInField(remaining, edit)) {  in ScanRealInput()
287       io.SkipSpaces(remaining);  in ScanRealInput()
288       next = io.NextInField(remaining, edit);  in ScanRealInput()
298         next = io.NextInField(remaining, edit);  in ScanRealInput()
300       for (exponent = 0; next; next = io.NextInField(remaining, edit)) {  in ScanRealInput()
335       next = io.NextInField(remaining, edit);  in ScanRealInput()
344   } else if (remaining) {  in ScanRealInput()
346       next = io.NextInField(remaining, edit);  in ScanRealInput()
572   std::optional<int> remaining;  in EditLogicalInput()  local
573   std::optional<char32_t> next{io.PrepareInput(edit, remaining)};  in EditLogicalInput()
575     next = io.NextInField(remaining, edit);  in EditLogicalInput()
595   if (remaining) { // ignore the rest of the field  in EditLogicalInput()
596     io.HandleRelativePosition(*remaining);  in EditLogicalInput()
598     while (io.NextInField(remaining, edit)) { // discard rest of field  in EditLogicalInput()
655   std::optional<int> remaining{length > 0 ? maxUTF8Bytes : 0};  in EditListDirectedCharacterInput()  local
656   while (std::optional<char32_t> next{io.NextInField(remaining, edit)}) {  in EditListDirectedCharacterInput()
674       remaining = 0;  in EditListDirectedCharacterInput()
677       remaining = --length > 0 ? maxUTF8Bytes : 0;  in EditListDirectedCharacterInput()
706   std::size_t remaining{length};  in EditCharacterInput()  local
708     remaining = *edit.width;  in EditCharacterInput()
717   std::size_t skip{remaining > length ? remaining - length : 0};  in EditCharacterInput()
719   while (remaining > 0) {  in EditCharacterInput()
742       --remaining;  in EditCharacterInput()
752       --remaining;  in EditCharacterInput()
758         chunk = std::min<std::size_t>(remaining, ready);  in EditCharacterInput()
763       remaining -= chunk;  in EditCharacterInput()