TreeNode processSelectorExpression()

in lib/parser.dart [1612:1666]
49 lines of code
11 McCabe index (conditional complexity)

  TreeNode /* SelectorExpression | LiteralTerm */ processSelectorExpression() {
    var start = _peekToken.span;

    var expressions = <Expression>[];

    Token? termToken;
    dynamic value;

    var keepParsing = true;
    while (keepParsing) {
      switch (_peek()) {
        case TokenKind.PLUS:
          start = _peekToken.span;
          termToken = _next();
          expressions.add(OperatorPlus(_makeSpan(start)));
          break;
        case TokenKind.MINUS:
          start = _peekToken.span;
          termToken = _next();
          expressions.add(OperatorMinus(_makeSpan(start)));
          break;
        case TokenKind.INTEGER:
          termToken = _next();
          value = int.parse(termToken.text);
          break;
        case TokenKind.DOUBLE:
          termToken = _next();
          value = double.parse(termToken.text);
          break;
        case TokenKind.SINGLE_QUOTE:
          value = processQuotedString(false);
          value = "'${_escapeString(value as String, single: true)}'";
          return LiteralTerm(value, value, _makeSpan(start));
        case TokenKind.DOUBLE_QUOTE:
          value = processQuotedString(false);
          value = '"${_escapeString(value as String)}"';
          return LiteralTerm(value, value, _makeSpan(start));
        case TokenKind.IDENTIFIER:
          value = identifier(); // Snarf up the ident we'll remap, maybe.
          break;
        default:
          keepParsing = false;
      }

      if (keepParsing && value != null) {
        var unitTerm =
            processDimension(termToken, value as Object, _makeSpan(start));
        expressions.add(unitTerm);

        value = null;
      }
    }

    return SelectorExpression(expressions, _makeSpan(start));
  }