when<TResult extends Object?> method
- @optionalTypeArgs
A switch
-like method, using callbacks.
As opposed to map
, this offers destructuring.
It is equivalent to doing:
switch (sealedClass) {
case Subclass(:final field):
return ...;
case Subclass2(:final field2):
return ...;
}
Implementation
@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String $type, DateTime createdAt, @AgeAssuranceEventStatusConverter() AgeAssuranceEventStatus status, String attemptId, String? initIp, String? initUa, String? completeIp, String? completeUa, Map<String, dynamic>? $unknown) $default,) {final _that = this;
switch (_that) {
case _AgeAssuranceEvent():
return $default(_that.$type,_that.createdAt,_that.status,_that.attemptId,_that.initIp,_that.initUa,_that.completeIp,_that.completeUa,_that.$unknown);case _:
throw StateError('Unexpected subclass');
}
}