reference method

@override Parser reference()

Implementation

@override
Parser reference() => super.reference().map((c) {
      var expressionPath = <String>[];
      String elementId = c[1];
      expressionPath.add(elementId);
      var expressionProviderElement = expressionProviderElementMap[elementId];
      if (expressionProviderElement == null) {
        throw NullReferenceException(
            'Reference named {$elementId} does not exist.');
      }
      ExpressionProvider? expressionProvider;
      if (c[2].length == 0) {
        expressionProvider =
            expressionProviderElement.getExpressionProvider();
        return createDelegateExpression(expressionPath, expressionProvider);
      }
      for (var i = 0; i < c[2].length; i++) {
        var propertyName = c[2][i][1];
        expressionPath.add(propertyName);
        expressionProvider =
            expressionProviderElement!.getExpressionProvider(propertyName);
        if (expressionProvider
            is ExpressionProvider<ExpressionProviderElement>) {
          expressionProviderElement =
              expressionProvider.getExpression().evaluate();
        }
      }
      return createDelegateExpression(expressionPath, expressionProvider);
    });