void Scanner::ScanBlockScalar()

in lib/yamlcpp/src/scantoken.cpp [375:436]
42 lines of code
14 McCabe index (conditional complexity)

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;

  Token token(Token::NON_PLAIN_SCALAR, mark);
  token.value = scalar;
  m_tokens.push(token);
}