when<TResult extends Object?> method
TResult
when<TResult extends Object?>()
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(
int? number,
String? name,
String? status,
String? conclusion,
ModelTimestamp? startedAt,
ModelTimestamp? completedAt)
$default,
) {
final _that = this;
switch (_that) {
case _GithubActionsStepValue():
return $default(_that.number, _that.name, _that.status,
_that.conclusion, _that.startedAt, _that.completedAt);
case _:
throw StateError('Unexpected subclass');
}
}