whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String name,
    2. String command,
    3. List<String>? runInPackages,
    4. String? runHooksFrom,
    5. Map<String, String>? env,
    )?
)

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 command,  List<String>? runInPackages,  String? runHooksFrom,  Map<String, String>? env)?  $default,) {final _that = this;
switch (_that) {
case _Script() when $default != null:
return $default(_that.name,_that.command,_that.runInPackages,_that.runHooksFrom,_that.env);case _:
  return null;

}
}