LiteralTerm processDimension()

in lib/parser.dart [2401:2478]
76 lines of code
29 McCabe index (conditional complexity)

  LiteralTerm processDimension(Token? t, Object value, SourceSpan span) {
    LiteralTerm term;
    var unitType = _peek();

    switch (unitType) {
      case TokenKind.UNIT_EM:
        term = EmTerm(value, t!.text, span);
        _next(); // Skip the unit
        break;
      case TokenKind.UNIT_EX:
        term = ExTerm(value, t!.text, span);
        _next(); // Skip the unit
        break;
      case TokenKind.UNIT_LENGTH_PX:
      case TokenKind.UNIT_LENGTH_CM:
      case TokenKind.UNIT_LENGTH_MM:
      case TokenKind.UNIT_LENGTH_IN:
      case TokenKind.UNIT_LENGTH_PT:
      case TokenKind.UNIT_LENGTH_PC:
        term = LengthTerm(value, t!.text, span, unitType);
        _next(); // Skip the unit
        break;
      case TokenKind.UNIT_ANGLE_DEG:
      case TokenKind.UNIT_ANGLE_RAD:
      case TokenKind.UNIT_ANGLE_GRAD:
      case TokenKind.UNIT_ANGLE_TURN:
        term = AngleTerm(value, t!.text, span, unitType);
        _next(); // Skip the unit
        break;
      case TokenKind.UNIT_TIME_MS:
      case TokenKind.UNIT_TIME_S:
        term = TimeTerm(value, t!.text, span, unitType);
        _next(); // Skip the unit
        break;
      case TokenKind.UNIT_FREQ_HZ:
      case TokenKind.UNIT_FREQ_KHZ:
        term = FreqTerm(value, t!.text, span, unitType);
        _next(); // Skip the unit
        break;
      case TokenKind.PERCENT:
        term = PercentageTerm(value, t!.text, span);
        _next(); // Skip the %
        break;
      case TokenKind.UNIT_FRACTION:
        term = FractionTerm(value, t!.text, span);
        _next(); // Skip the unit
        break;
      case TokenKind.UNIT_RESOLUTION_DPI:
      case TokenKind.UNIT_RESOLUTION_DPCM:
      case TokenKind.UNIT_RESOLUTION_DPPX:
        term = ResolutionTerm(value, t!.text, span, unitType);
        _next(); // Skip the unit
        break;
      case TokenKind.UNIT_CH:
        term = ChTerm(value, t!.text, span, unitType);
        _next(); // Skip the unit
        break;
      case TokenKind.UNIT_REM:
        term = RemTerm(value, t!.text, span, unitType);
        _next(); // Skip the unit
        break;
      case TokenKind.UNIT_VIEWPORT_VW:
      case TokenKind.UNIT_VIEWPORT_VH:
      case TokenKind.UNIT_VIEWPORT_VMIN:
      case TokenKind.UNIT_VIEWPORT_VMAX:
        term = ViewportTerm(value, t!.text, span, unitType);
        _next(); // Skip the unit
        break;
      default:
        if (value is Identifier) {
          term = LiteralTerm(value, value.name, span);
        } else {
          term = NumberTerm(value, t!.text, span);
        }
    }

    return term;
  }