whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. XrayInt32Range? maxConcurrency,
    2. XrayInt32Range? maxConnections,
    3. XrayInt32Range? cMaxReuseTimes,
    4. XrayInt32Range? hMaxRequestTimes,
    5. XrayInt32Range? hMaxReusableSecs,
    6. int? hKeepAlivePeriod,
    )?
)

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(
          XrayInt32Range? maxConcurrency,
          XrayInt32Range? maxConnections,
          XrayInt32Range? cMaxReuseTimes,
          XrayInt32Range? hMaxRequestTimes,
          XrayInt32Range? hMaxReusableSecs,
          int? hKeepAlivePeriod)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _XmuxConfig() when $default != null:
      return $default(
          _that.maxConcurrency,
          _that.maxConnections,
          _that.cMaxReuseTimes,
          _that.hMaxRequestTimes,
          _that.hMaxReusableSecs,
          _that.hKeepAlivePeriod);
    case _:
      return null;
  }
}