when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String userId,
    2. String orgId,
    3. int totalXp,
    4. int currentStreak,
    5. int longestStreak,
    6. DateTime? lastActivityDate,
    )
)

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 userId,  String orgId,  int totalXp,  int currentStreak,  int longestStreak,  DateTime? lastActivityDate)  $default,) {final _that = this;
switch (_that) {
case _UserXp():
return $default(_that.userId,_that.orgId,_that.totalXp,_that.currentStreak,_that.longestStreak,_that.lastActivityDate);case _:
  throw StateError('Unexpected subclass');

}
}