35   const auto EmitWithAdvance{[&](char ch) -> bool {  in IONAME()
37         io.Emit(&ch, 1);  in IONAME()
74 static constexpr bool IsLegalIdStart(char32_t ch) {  in IsLegalIdStart()  argument
75   return (ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || ch == '_' ||  in IsLegalIdStart()
76       ch == '@' || ch == '$';  in IsLegalIdStart()
79 static constexpr bool IsLegalIdChar(char32_t ch) {  in IsLegalIdChar()  argument
80   return IsLegalIdStart(ch) || (ch >= '0' && ch <= '9');  in IsLegalIdChar()
83 static constexpr char NormalizeIdChar(char32_t ch) {  in NormalizeIdChar()  argument
84   return static_cast<char>(ch >= 'A' && ch <= 'Z' ? ch - 'A' + 'a' : ch);  in NormalizeIdChar()
90   if (auto ch{io.GetNextNonBlank(byteLength)}) {  in GetLowerCaseName()  local
91     if (IsLegalIdStart(*ch)) {  in GetLowerCaseName()
94         buffer[j] = NormalizeIdChar(*ch);  in GetLowerCaseName()
96         ch = io.GetCurrentChar(byteLength);  in GetLowerCaseName()
97       } while (++j < maxLength && ch && IsLegalIdChar(*ch));  in GetLowerCaseName()
112   std::optional<char32_t> ch{io.GetCurrentChar(byteCount)};  in GetSubscriptValue()  local
113   bool negate{ch && *ch == '-'};  in GetSubscriptValue()
114   if ((ch && *ch == '+') || negate) {  in GetSubscriptValue()
116     ch = io.GetCurrentChar(byteCount);  in GetSubscriptValue()
119   while (ch && *ch >= '0' && *ch <= '9') {  in GetSubscriptValue()
122     value = 10 * was + *ch - '0';  in GetSubscriptValue()
124     ch = io.GetCurrentChar(byteCount);  in GetSubscriptValue()
152   std::optional<char32_t> ch{io.GetNextNonBlank(byteCount)};  in HandleSubscripts()  local
154   for (; ch && *ch != ')'; ++j) {  in HandleSubscripts()
182       ch = io.GetNextNonBlank(byteCount);  in HandleSubscripts()
184     if (ch && *ch == ':') {  in HandleSubscripts()
186       ch = io.GetNextNonBlank(byteCount);  in HandleSubscripts()
200         ch = io.GetNextNonBlank(byteCount);  in HandleSubscripts()
202       if (ch && *ch == ':') {  in HandleSubscripts()
204         ch = io.GetNextNonBlank(byteCount);  in HandleSubscripts()
207           ch = io.GetNextNonBlank(byteCount);  in HandleSubscripts()
214     if (ch && *ch == comma) {  in HandleSubscripts()
216       ch = io.GetNextNonBlank(byteCount);  in HandleSubscripts()
225     if (ch && *ch == ')') {  in HandleSubscripts()
257   std::optional<char32_t> ch{io.GetNextNonBlank(byteCount)};  in HandleSubstring()  local
258   if (ch) {  in HandleSubstring()
259     if (*ch == ':') {  in HandleSubstring()
263       ch = io.GetNextNonBlank(byteCount);  in HandleSubstring()
266   if (ch && ch == ':') {  in HandleSubstring()
268     ch = io.GetNextNonBlank(byteCount);  in HandleSubstring()
269     if (ch) {  in HandleSubstring()
270       if (*ch == ')') {  in HandleSubstring()
274         ch = io.GetNextNonBlank(byteCount);  in HandleSubstring()
278   if (ch && *ch == ')') {  in HandleSubstring()
343   while (auto ch{io.GetNextNonBlank(byteCount)}) {  in SkipNamelistGroup()  local
345     if (*ch == '/') {  in SkipNamelistGroup()
347     } else if (*ch == '\'' || *ch == '"') {  in SkipNamelistGroup()
349       char32_t quote{*ch};  in SkipNamelistGroup()
351         if ((ch = io.GetCurrentChar(byteCount))) {  in SkipNamelistGroup()
353           if (*ch == quote) {  in SkipNamelistGroup()
500       if (auto ch{io.GetNextNonBlank(byteCount)}) {  in IsNamelistName()  local
501         if (IsLegalIdStart(*ch)) {  in IsNamelistName()
504             ch = io.GetCurrentChar(byteCount);  in IsNamelistName()
505           } while (ch && IsLegalIdChar(*ch));  in IsNamelistName()
506           ch = io.GetNextNonBlank(byteCount);  in IsNamelistName()
508           return ch && (*ch == '=' || *ch == '(' || *ch == '%');  in IsNamelistName()