mapOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? mapOrNull<TResult extends Object?>({ TResult? invalidPath(HaudiotaggerError_InvalidPath value)?, TResult? noTags(HaudiotaggerError_NoTags value)?, TResult? openFile(HaudiotaggerError_OpenFile value)?, TResult? write(HaudiotaggerError_Write value)?, })

A variant of map that fallback to returning null.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  TResult? Function(HaudiotaggerError_InvalidPath value)? invalidPath,
  TResult? Function(HaudiotaggerError_NoTags value)? noTags,
  TResult? Function(HaudiotaggerError_OpenFile value)? openFile,
  TResult? Function(HaudiotaggerError_Write value)? write,
}) {
  final _that = this;
  switch (_that) {
    case HaudiotaggerError_InvalidPath() when invalidPath != null:
      return invalidPath(_that);
    case HaudiotaggerError_NoTags() when noTags != null:
      return noTags(_that);
    case HaudiotaggerError_OpenFile() when openFile != null:
      return openFile(_that);
    case HaudiotaggerError_Write() when write != null:
      return write(_that);
    case _:
      return null;
  }
}