Function ScanScalar

lib/yamlcpp/src/scanscalar.cpp:21–250

ScanScalar . This is where the scalar magic happens. . We do the scanning in three phases: 1. Scan until newline 2. Eat newline 3. Scan leading blanks. . Depending on the parameters given, we store or stop and different places in the above flow.

// . Depending on the parameters given, we store or stop
//   and different places in the above flow.
std::string ScanScalar(Stream& INPUT, ScanScalarParams& params) {
  bool foundNonEmptyLine = false;
  bool pastOpeningBreak = (params.fold == FOLD_FLOW);
  bool emptyLine = false, moreIndented = false;
  int foldedNewlineCount = 0;
  bool foldedNewlineStartedMoreIndented = false;
  std::size_t lastEscapedChar = std::string::npos;
  std::string scalar;
  params.leadingSpaces = false;

  if (!params.end) {
    params.end = &Exp::Empty();
  }

  while (INPUT) {
    // ********************************
    // Phase #1: scan until line ending

    std::size_t lastNonWhitespaceChar = scalar.size();
    bool escapedNewline = false;
    while (!params.end->Matches(INPUT) && !Exp::Break().Matches(INPUT)) {
      if (!INPUT) {
        break;
      }

      // document indicator?
      if (INPUT.column() == 0 && Exp::DocIndicator().Matches(INPUT)) {
        if (params.onDocIndicator == BREAK) {
          break;
        }
        if (params.onDocIndicator == THROW) {
          throw ParserException(INPUT.mark(), ErrorMsg::DOC_IN_SCALAR);
        }
      }

      foundNonEmptyLine = true;
      pastOpeningBreak = true;

      // escaped newline? (only if we're escaping on slash)
      if (params.escape == '\\' && Exp::EscBreak().Matches(INPUT)) {
        // eat escape character and get out (but preserve trailing whitespace!)
        INPUT.get();
        lastNonWhitespaceChar = scalar.size();
        lastEscapedChar = scalar.size();
        escapedNewline = true;
        break;
      }

      // escape this?
      if (INPUT.peek() == params.escape) {
        scalar += Exp::Escape(INPUT);
        lastNonWhitespaceChar = scalar.size();
        lastEscapedChar = scalar.size();
        continue;
      }

      // otherwise, just add the damn character
      char ch = INPUT.get();