whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. int? minSdkVersion,
    2. int? compileSdkVersion,
    3. int? targetSdkVersion
    )?
)

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? minSdkVersion, int? compileSdkVersion, int? targetSdkVersion)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _AndroidPlatformConstraints() when $default != null:
      return $default(_that.minSdkVersion, _that.compileSdkVersion,
          _that.targetSdkVersion);
    case _:
      return null;
  }
}