Hi!

Is there a way (or is there any plan in the future) to extend cameleer with a primitive that produces a value of a specified type nondeterministically?
WhyML has a primitive any.
http://why3.lri.fr/doc/syntaxref.html#the-any-expression
If we write any bool, it evaluates to a boolean value nondeterministically. I wonder whether there is a way to do the same thing in cameleer. Simulating any bool with a function that randomly returns true or false using Random.bool causes a termination issue. (I'll write a concrete example later.)

Update

Sorry, the above description that a termination issue arises was not accurate. The true problem seems to be that we don't know how to call Random.bool or, more in general, library functions in Cameleer. If we can call Random.bool, then we can successfully simulate any as follows.

type t = A | B | C of t * t

(* Simulating "any t" in WhyML *)
let rec any_t (n:int) =
  if n < 0 then
    A
  else if Random.bool () then
    B
  else
    C(any_t (n-1), any_t (n-1))
  (*@ variant  n *)

...

let f () =
  let t = any_rep (Random.int ()) in
  ...