Method ScanBlockScalar

lib/yamlcpp/src/scantoken.cpp:375–436

BlockScalarToken . These need a little extra processing beforehand. . We need to scan the line where the indicator is (this doesn't count as part of the scalar), and then we need to figure out what level of indentation we'll be using.

// of the scalar),
//   and then we need to figure out what level of indentation we'll be using.
void Scanner::ScanBlockScalar() {
  std::string scalar;

  ScanScalarParams params;
  params.indent = 1;
  params.detectIndent = true;

  // eat block indicator ('|' or '>')
  Mark mark = INPUT.mark();
  char indicator = INPUT.get();
  params.fold = (indicator == Keys::FoldedScalar ? FOLD_BLOCK : DONT_FOLD);

  // eat chomping/indentation indicators
  params.chomp = CLIP;
  int n = Exp::Chomp().Match(INPUT);
  for (int i = 0; i < n; i++) {
    char ch = INPUT.get();
    if (ch == '+')
      params.chomp = KEEP;
    else if (ch == '-')
      params.chomp = STRIP;
    else if (Exp::Digit().Matches(ch)) {
      if (ch == '0')
        throw ParserException(INPUT.mark(), ErrorMsg::ZERO_INDENT_IN_BLOCK);

      params.indent = ch - '0';
      params.detectIndent = false;
    }
  }

  // now eat whitespace
  while (Exp::Blank().Matches(INPUT))
    INPUT.eat(1);

  // and comments to the end of the line
  if (Exp::Comment().Matches(INPUT))
    while (INPUT && !Exp::Break().Matches(INPUT))
      INPUT.eat(1);

  // if it's not a line break, then we ran into a bad character inline
  if (INPUT && !Exp::Break().Matches(INPUT))
    throw ParserException(INPUT.mark(), ErrorMsg::CHAR_IN_BLOCK);

  // set the initial indentation
  if (GetTopIndent() >= 0)
    params.indent += GetTopIndent();

  params.eatLeadingWhitespace = false;
  params.trimTrailingSpaces = false;
  params.onTabInIndentation = THROW;

  scalar = ScanScalar(INPUT, params);

  // simple keys always ok after block scalars (since we're gonna start a new
  // line anyways)
  m_simpleKeyAllowed = true;
  m_canBeJSONFlow = false;