module type N =sig..end
type t
val gen : ?g:Nocrypto.Rng.g -> t -> tgen ~g n picks a value in the interval [0, n - 1] uniformly at random.val gen_r : ?g:Nocrypto.Rng.g ->
t -> t -> tgen_r ~g low high picks a value from the interval [low, high - 1]
uniformly at random.val gen_bits : ?g:Nocrypto.Rng.g -> ?msb:int -> int -> tgen_bits ~g ~msb n picks a bit-string n bits long, with msb most
significant bits set, and interprets it as a t in big-endidan.
This yields a value in the interval
[2^(n-1) + ... + 2^(n-msb), 2^n - 1].
msb defaults to 0 which reduces gen_bits k to gen 2^k.