when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. double latitude,
    2. double longitude,
    3. String displayName,
    4. String? city,
    5. String? country,
    )
)

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( double latitude,  double longitude,  String displayName,  String? city,  String? country)  $default,) {final _that = this;
switch (_that) {
case _CityCoordinates():
return $default(_that.latitude,_that.longitude,_that.displayName,_that.city,_that.country);case _:
  throw StateError('Unexpected subclass');

}
}