whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? id,
    2. String cardId,
    3. String userId,
    4. int quality,
    5. String rating,
    6. double elapsedDays,
    7. int scheduledDays,
    8. double? stability,
    9. double? difficulty,
    10. String? reviewState,
    11. DateTime reviewedAt,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( String? id,  String cardId,  String userId,  int quality,  String rating,  double elapsedDays,  int scheduledDays,  double? stability,  double? difficulty,  String? reviewState,  DateTime reviewedAt)?  $default,) {final _that = this;
switch (_that) {
case _ReviewLogModel() when $default != null:
return $default(_that.id,_that.cardId,_that.userId,_that.quality,_that.rating,_that.elapsedDays,_that.scheduledDays,_that.stability,_that.difficulty,_that.reviewState,_that.reviewedAt);case _:
  return null;

}
}