whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? status,
    2. int aheadBy,
    3. int behindBy,
    4. int totalCommits,
    5. GithubCommitModel? mergeBaseCommit,
    6. GithubCommitModel? baseCommit,
    7. List<GithubCommitModel> commits,
    8. ModelUri? diffUrl,
    9. ModelUri? patchUrl,
    10. ModelUri? htmlUrl,
    11. ModelUri? permalinkUrl,
    12. bool fromServer,
    )?
)

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? status,
          int aheadBy,
          int behindBy,
          int totalCommits,
          @jsonParam GithubCommitModel? mergeBaseCommit,
          @jsonParam GithubCommitModel? baseCommit,
          @jsonParam List<GithubCommitModel> commits,
          ModelUri? diffUrl,
          ModelUri? patchUrl,
          ModelUri? htmlUrl,
          ModelUri? permalinkUrl,
          bool fromServer)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _GithubCompareModel() when $default != null:
      return $default(
          _that.status,
          _that.aheadBy,
          _that.behindBy,
          _that.totalCommits,
          _that.mergeBaseCommit,
          _that.baseCommit,
          _that.commits,
          _that.diffUrl,
          _that.patchUrl,
          _that.htmlUrl,
          _that.permalinkUrl,
          _that.fromServer);
    case _:
      return null;
  }
}