maybeWhen<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeWhen<TResult extends Object?>({
  1. TResult initial()?,
  2. TResult unauthenticated()?,
  3. TResult authenticated(
    1. User user
    )?,
  4. required TResult orElse(),
})

A variant of when that fallback to an orElse callback.

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return orElse();
}

Implementation

@optionalTypeArgs TResult maybeWhen<TResult extends Object?>({TResult Function()?  initial,TResult Function()?  unauthenticated,TResult Function( User user)?  authenticated,required TResult orElse(),}) {final _that = this;
switch (_that) {
case _Initial() when initial != null:
return initial();case _Unauthenticated() when unauthenticated != null:
return unauthenticated();case _Authenticated() when authenticated != null:
return authenticated(_that.user);case _:
  return orElse();

}
}