whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String protocol,
    2. XrayPortList? port,
    3. XrayAddress? listen,
    4. XrayInboundSettings? settings,
    5. String? tag,
    6. StreamConfig? streamSettings,
    7. SniffingConfig? sniffing,
    )?
)

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,
          XrayPortList? port,
          XrayAddress? listen,
          XrayInboundSettings? settings,
          String? tag,
          StreamConfig? streamSettings,
          SniffingConfig? sniffing)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _InboundDetourConfig() when $default != null:
      return $default(_that.protocol, _that.port, _that.listen,
          _that.settings, _that.tag, _that.streamSettings, _that.sniffing);
    case _:
      return null;
  }
}