execute method

@override @override List execute(List results, Map<String, dynamic> passed)

The iterable, nested function that evaluates the entire FHIRPath expression one object at a time

Implementation

@override
@override
List execute(List results, Map<String, dynamic> passed) {
  final executedValue = value.execute(results.toList(), passed);
  return results.isEmpty
      ? []
      : results.length > 1
      ? throw _requiresList('.indexOf()', results)
      : executedValue.first is! String
      ? throw _requiresString('.indexOf()', results)
      : results.first.toString() == ''
      ? []
      : [results.first.toString().indexOf(executedValue.first as String)];
}