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, String id, String name, String? subject, String contentMarkdown, bool disabled, String? lang, String lastUpdatedBy, DateTime createdAt, DateTime updatedAt, Map<String, dynamic>? $unknown) $default,) {final _that = this;
switch (_that) {
case _TemplateView():
return $default(_that.$type,_that.id,_that.name,_that.subject,_that.contentMarkdown,_that.disabled,_that.lang,_that.lastUpdatedBy,_that.createdAt,_that.updatedAt,_that.$unknown);case _:
throw StateError('Unexpected subclass');
}
}