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(@JsonKey(name: 'latitude') String? latitude, @JsonKey(name: 'longitude') String? longitude, @JsonKey(name: 'locality') String? locality, @JsonKey(name: 'name') String? name, @JsonKey(name: 'placeID') String? placeID, @JsonKey(name: 'formattedAddress') String? formattedAddress) $default,) {final _that = this;
switch (_that) {
case _Address():
return $default(_that.latitude,_that.longitude,_that.locality,_that.name,_that.placeID,_that.formattedAddress);case _:
throw StateError('Unexpected subclass');
}
}