arrow-fx-coroutines / arrow.fx.coroutines / guarantee
guarantee
suspend inline fun <A> guarantee(fa: suspend () -> A, crossinline finalizer: suspend () -> Unit): A
Guarantees execution of a given finalizer after fa regardless of success, error or cancellation.
As best practice, it’s not a good idea to release resources via guarantee. since guarantee doesn’t properly model acquiring, using and releasing resources. It only models scheduling of a finalizer after a given suspending program, so you should prefer Resource or bracket which captures acquiring, using and releasing into 3 separate steps to ensure resource safety.
Parameters
fa - program that you want to register handler on
finalizer - handler to run after fa.
See Also