execute method

@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
List execute(List results, Map<String, dynamic> passed) => results.isEmpty
    ? []
    : results.length > 1
        ? throw _conversionException('.convertsToBoolean()', results)
        : _isNotAcceptedType(results)
            ? [false]
            : results.first is bool ||
                    results.first == 1 ||
                    results.first == 0 ||
                    [
                          'true',
                          't',
                          'yes',
                          'y',
                          '1',
                          '1.0',
                          'false',
                          'f',
                          'no',
                          'n',
                          '0',
                          '0.0'
                        ].indexWhere((element) =>
                            element ==
                            results.first.toString().toLowerCase()) !=
                        -1
                ? [true]
                : [false];