whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String protocol,
    2. String? sendThrough,
    3. String? tag,
    4. XrayOutboundSettings? settings,
    5. StreamConfig? streamSettings,
    6. ProxyConfig? proxySettings,
    7. MuxConfig? mux,
    8. XrayTargetStrategy? targetStrategy,
    )?
)

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 protocol,
          String? sendThrough,
          String? tag,
          XrayOutboundSettings? settings,
          StreamConfig? streamSettings,
          ProxyConfig? proxySettings,
          MuxConfig? mux,
          XrayTargetStrategy? targetStrategy)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _OutboundDetourConfig() when $default != null:
      return $default(
          _that.protocol,
          _that.sendThrough,
          _that.tag,
          _that.settings,
          _that.streamSettings,
          _that.proxySettings,
          _that.mux,
          _that.targetStrategy);
    case _:
      return null;
  }
}