when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>({
  1. required TResult internal(
    1. String? directory,
    2. bool verbose,
    3. bool debug
    ),
})

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>({required TResult Function( String? directory,  bool verbose,  bool debug)  internal,}) {final _that = this;
switch (_that) {
case _GlobalOptions():
return internal(_that.directory,_that.verbose,_that.debug);case _:
  throw StateError('Unexpected subclass');

}
}