when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. AuthStatus status,
    2. AuthUser? user,
    3. String? error
    )
)

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( AuthStatus status,  AuthUser? user,  String? error)  $default,) {final _that = this;
switch (_that) {
case _AuthState():
return $default(_that.status,_that.user,_that.error);case _:
  throw StateError('Unexpected subclass');

}
}