Iterable split()

in lib/src/characters_impl.dart [982:1012]

• 30 lines of code
• 9 McCabe index (conditional complexity)

  Iterable<CharacterRange> split(Characters pattern, [int maxParts = 0]) sync* {
    if (maxParts == 1 || _start == _end) {
      yield this;
      return;
    }
    var patternString = pattern.string;
    var start = _start;
    if (patternString.isNotEmpty) {
      do {
        var match = _indexOf(_string, patternString, start, _end);
        if (match < 0) break;
        yield StringCharacterRange._(_string, start, match);
        start = match + patternString.length;
        maxParts--;
      } while (maxParts != 1);
      yield StringCharacterRange._(_string, start, _end);
    } else {
      // Empty pattern. Split on internal boundaries only.
      var breaks = Breaks(_string, _start, _end, stateSoTNoBreak);
      do {
        var match = breaks.nextBreak();
        if (match < 0) return;
        yield StringCharacterRange._(_string, start, match);
        start = match;
        maxParts--;
      } while (maxParts != 1);
      if (start < _end) {
        yield StringCharacterRange._(_string, start, _end);
      }
    }
  }