Method isSet

src/Lexer.cpp:673–706

/////////////////////////////////////////////////////////////////////////// Lexer::Type::set a single number: 1 a list of numbers: 1,3,5 a range: 5-10 or a combination: 1,3,5-10 [ - ] [ , [ - ] ] ...

//
//   <id> [ - <id> ] [ , <id> [ - <id> ] ] ...
bool Lexer::isSet(std::string& token, Lexer::Type& type) {
  std::size_t marker = _cursor;
  int count = 0;
  std::string dummyToken;
  Lexer::Type dummyType;

  do {
    if (isInteger(dummyToken, dummyType)) {
      ++count;
      if (isLiteral("-", false, false)) {
        if (isInteger(dummyToken, dummyType))
          ++count;
        else {
          _cursor = marker;
          return false;
        }
      }
    } else {
      _cursor = marker;
      return false;
    }
  } while (isLiteral(",", false, false));

  // Success is multiple numbers, matching the pattern.
  if (count > 1 && (isEOS() || unicodeWhitespace(_text[_cursor]) ||
                    isHardBoundary(_text[_cursor], _text[_cursor + 1]))) {
    token = _text.substr(marker, _cursor - marker);
    type = Lexer::Type::set;
    return true;
  }

  _cursor = marker;
  return false;
}

////////////////////////////////////////////////////////////////////////////////
// Lexer::Type::tag