whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. int? id,
    2. String? nodeId,
    3. int? number,
    4. String? state,
    5. String? title,
    6. String? body,
    7. String? mergeCommitSha,
    8. String? mergeableState,
    9. String? authorAssociation,
    10. bool draft,
    11. bool merged,
    12. bool mergeable,
    13. bool rebaseable,
    14. bool maintainerCanModify,
    15. int commentsCount,
    16. int commitsCount,
    17. int additionsCount,
    18. int deletionsCount,
    19. int changedFilesCount,
    20. int reviewCommentCount,
    21. GithubRepositoryModelRef? repository,
    22. GithubUserModelRef? user,
    23. GithubUserModelRef? mergedBy,
    24. List<GithubUserModelRef?> requestedReviewers,
    25. List<GithubLabelValue> labels,
    26. GithubPullRequestHeadValue? head,
    27. GithubPullRequestHeadValue? base,
    28. GithubMilestoneValue? milestone,
    29. ModelUri? htmlUrl,
    30. ModelUri? diffUrl,
    31. ModelUri? patchUrl,
    32. ModelTimestamp? closedAt,
    33. ModelTimestamp? mergedAt,
    34. ModelTimestamp createdAt,
    35. ModelTimestamp updatedAt,
    36. 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(
          int? id,
          String? nodeId,
          int? number,
          String? state,
          String? title,
          String? body,
          String? mergeCommitSha,
          String? mergeableState,
          String? authorAssociation,
          bool draft,
          bool merged,
          bool mergeable,
          bool rebaseable,
          bool maintainerCanModify,
          int commentsCount,
          int commitsCount,
          int additionsCount,
          int deletionsCount,
          int changedFilesCount,
          int reviewCommentCount,
          @refParam GithubRepositoryModelRef? repository,
          @refParam GithubUserModelRef? user,
          @refParam GithubUserModelRef? mergedBy,
          @refParam List<GithubUserModelRef> requestedReviewers,
          @jsonParam List<GithubLabelValue> labels,
          @jsonParam GithubPullRequestHeadValue? head,
          @jsonParam GithubPullRequestHeadValue? base,
          @jsonParam GithubMilestoneValue? milestone,
          ModelUri? htmlUrl,
          ModelUri? diffUrl,
          ModelUri? patchUrl,
          ModelTimestamp? closedAt,
          ModelTimestamp? mergedAt,
          ModelTimestamp createdAt,
          ModelTimestamp updatedAt,
          bool fromServer)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _GithubPullRequestModel() when $default != null:
      return $default(
          _that.id,
          _that.nodeId,
          _that.number,
          _that.state,
          _that.title,
          _that.body,
          _that.mergeCommitSha,
          _that.mergeableState,
          _that.authorAssociation,
          _that.draft,
          _that.merged,
          _that.mergeable,
          _that.rebaseable,
          _that.maintainerCanModify,
          _that.commentsCount,
          _that.commitsCount,
          _that.additionsCount,
          _that.deletionsCount,
          _that.changedFilesCount,
          _that.reviewCommentCount,
          _that.repository,
          _that.user,
          _that.mergedBy,
          _that.requestedReviewers,
          _that.labels,
          _that.head,
          _that.base,
          _that.milestone,
          _that.htmlUrl,
          _that.diffUrl,
          _that.patchUrl,
          _that.closedAt,
          _that.mergedAt,
          _that.createdAt,
          _that.updatedAt,
          _that.fromServer);
    case _:
      return null;
  }
}