bool Scanner::fetchMoreTokens()

in lib/LLVMSupport/Support/YAMLParser.cpp [1670:1760]

• 66 lines of code
• 54 McCabe index (conditional complexity)

bool Scanner::fetchMoreTokens() {
  if (IsStartOfStream)
    return scanStreamStart();

  scanToNextToken();

  if (Current == End)
    return scanStreamEnd();

  removeStaleSimpleKeyCandidates();

  unrollIndent(Column);

  if (Column == 0 && *Current == '%')
    return scanDirective();

  if (Column == 0 && Current + 4 <= End
      && *Current == '-'
      && *(Current + 1) == '-'
      && *(Current + 2) == '-'
      && (Current + 3 == End || isBlankOrBreak(Current + 3)))
    return scanDocumentIndicator(true);

  if (Column == 0 && Current + 4 <= End
      && *Current == '.'
      && *(Current + 1) == '.'
      && *(Current + 2) == '.'
      && (Current + 3 == End || isBlankOrBreak(Current + 3)))
    return scanDocumentIndicator(false);

  if (*Current == '[')
    return scanFlowCollectionStart(true);

  if (*Current == '{')
    return scanFlowCollectionStart(false);

  if (*Current == ']')
    return scanFlowCollectionEnd(true);

  if (*Current == '}')
    return scanFlowCollectionEnd(false);

  if (*Current == ',')
    return scanFlowEntry();

  if (*Current == '-' && isBlankOrBreak(Current + 1))
    return scanBlockEntry();

  if (*Current == '?' && (FlowLevel || isBlankOrBreak(Current + 1)))
    return scanKey();

  if (*Current == ':' && (FlowLevel || isBlankOrBreak(Current + 1)))
    return scanValue();

  if (*Current == '*')
    return scanAliasOrAnchor(true);

  if (*Current == '&')
    return scanAliasOrAnchor(false);

  if (*Current == '!')
    return scanTag();

  if (*Current == '|' && !FlowLevel)
    return scanBlockScalar(true);

  if (*Current == '>' && !FlowLevel)
    return scanBlockScalar(false);

  if (*Current == '\'')
    return scanFlowScalar(false);

  if (*Current == '"')
    return scanFlowScalar(true);

  // Get a plain scalar.
  StringRef FirstChar(Current, 1);
  if (!(isBlankOrBreak(Current)
        || FirstChar.find_first_of("-?:,[]{}#&*!|>'\"%@`") != StringRef::npos)
      || (*Current == '-' && !isBlankOrBreak(Current + 1))
      || (!FlowLevel && (*Current == '?' || *Current == ':')
          && isBlankOrBreak(Current + 1))
      || (!FlowLevel && *Current == ':'
                      && Current + 2 < End
                      && *(Current + 1) == ':'
                      && !isBlankOrBreak(Current + 2)))
    return scanPlainScalar();

  setError("Unrecognized character while tokenizing.");
  return false;
}