whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? name,
    2. String? desc,
    3. @JsonKey.new(name: 'mtu') int? mtu,
    4. List<String>? gateway,
    5. @JsonKey.new(name: 'dns') List<String>? dns,
    6. int? userLevel,
    7. List<String>? autoSystemRoutingTable,
    8. String? autoOutboundsInterface,
    )?
)

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? name,
    String? desc,
    @JsonKey(name: 'mtu') int? mtu,
    List<String>? gateway,
    @JsonKey(name: 'dns') List<String>? dns,
    int? userLevel,
    List<String>? autoSystemRoutingTable,
    String? autoOutboundsInterface,
  )?
  $default,
) {
  final _that = this;
  switch (_that) {
    case _TunConfig() when $default != null:
      return $default(
        _that.name,
        _that.desc,
        _that.mtu,
        _that.gateway,
        _that.dns,
        _that.userLevel,
        _that.autoSystemRoutingTable,
        _that.autoOutboundsInterface,
      );
    case _:
      return null;
  }
}