Expressions processExpr()

in lib/parser.dart [2140:2200]
52 lines of code
14 McCabe index (conditional complexity)

  Expressions processExpr([bool ieFilter = false]) {
    var start = _peekToken.span;
    var expressions = Expressions(_makeSpan(start));

    var keepGoing = true;
    dynamic expr;
    while (keepGoing && (expr = processTerm(ieFilter)) != null) {
      Expression? op;

      var opStart = _peekToken.span;

      switch (_peek()) {
        case TokenKind.SLASH:
          op = OperatorSlash(_makeSpan(opStart));
          break;
        case TokenKind.COMMA:
          op = OperatorComma(_makeSpan(opStart));
          break;
        case TokenKind.BACKSLASH:
          // Backslash outside of string; detected IE8 or older signaled by \9
          // at end of an expression.
          var ie8Start = _peekToken.span;

          _next();
          if (_peekKind(TokenKind.INTEGER)) {
            var numToken = _next();
            var value = int.parse(numToken.text);
            if (value == 9) {
              op = IE8Term(_makeSpan(ie8Start));
            } else if (isChecked) {
              _warning(
                  '\$value is not valid in an expression', _makeSpan(start));
            }
          }
          break;
      }

      if (expr != null) {
        if (expr is List<Expression>) {
          for (var exprItem in expr) {
            expressions.add(exprItem);
          }
        } else {
          expressions.add(expr as Expression);
        }
      } else {
        keepGoing = false;
      }

      if (op != null) {
        expressions.add(op);
        if (op is IE8Term) {
          keepGoing = false;
        } else {
          _next();
        }
      }
    }

    return expressions;
  }