static bool ParseSpecialName()

in absl/debugging/internal/demangle.cc [988:1046]
50 lines of code
31 McCabe index (conditional complexity)

static bool ParseSpecialName(State *state) {
  ComplexityGuard guard(state);
  if (guard.IsTooComplex()) return false;
  ParseState copy = state->parse_state;
  if (ParseOneCharToken(state, 'T') && ParseCharClass(state, "VTISH") &&
      ParseType(state)) {
    return true;
  }
  state->parse_state = copy;

  if (ParseTwoCharToken(state, "Tc") && ParseCallOffset(state) &&
      ParseCallOffset(state) && ParseEncoding(state)) {
    return true;
  }
  state->parse_state = copy;

  if (ParseTwoCharToken(state, "GV") && ParseName(state)) {
    return true;
  }
  state->parse_state = copy;

  if (ParseOneCharToken(state, 'T') && ParseCallOffset(state) &&
      ParseEncoding(state)) {
    return true;
  }
  state->parse_state = copy;

  // G++ extensions
  if (ParseTwoCharToken(state, "TC") && ParseType(state) &&
      ParseNumber(state, nullptr) && ParseOneCharToken(state, '_') &&
      DisableAppend(state) && ParseType(state)) {
    RestoreAppend(state, copy.append);
    return true;
  }
  state->parse_state = copy;

  if (ParseOneCharToken(state, 'T') && ParseCharClass(state, "FJ") &&
      ParseType(state)) {
    return true;
  }
  state->parse_state = copy;

  if (ParseTwoCharToken(state, "GR") && ParseName(state)) {
    return true;
  }
  state->parse_state = copy;

  if (ParseTwoCharToken(state, "GA") && ParseEncoding(state)) {
    return true;
  }
  state->parse_state = copy;

  if (ParseOneCharToken(state, 'T') && ParseCharClass(state, "hv") &&
      ParseCallOffset(state) && ParseEncoding(state)) {
    return true;
  }
  state->parse_state = copy;
  return false;
}