Tail-recursion and scalaz promises
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30-10-2019 - |
Question
I am currently playing with Scalaz non-blocking futures aka. Promises. I am struggling to make the following function tail-recursive:
@tailrec
private def repeat( res: Promise[I] ):Promise[I] =
res map p flatMap {
(b:Boolean) =>
if( b ) repeat( res flatMap f ) else res
}
where p
is a predicate with type I=>Boolean
and f
is a concurrent function with
type I=>Promise[I]
.
The method compiles without the annotation.
Any hints ? Thanks
No correct solution
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