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 _ReviewLog() 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;

}
}