Seed

Module Hedgehog.Seed

Splittable pseudorandom number generator.

Wraps OCaml’s built-in Random.State which uses a splittable LXM algorithm.

type t = Stdlib.Random.State.t

val from : int64 -> t

Create a seed from an int64 value.

val random : unit -> t

Create a random seed using the system clock.

val split : t -> t * t

Split a seed into two independent seeds.

val next_int64 : t -> int64 * t

Generate a random int64.

val next_int : int -> int -> t -> int * t

next_int lo hi seed generates a random int in the inclusive range [lo, hi].

val next_int64_range : int64 -> int64 -> t -> int64 * t

next_int64_range lo hi seed generates a random int64 in the inclusive range [lo, hi].

val next_float : float -> float -> t -> float * t

next_float lo hi seed generates a random float in the range [lo, hi).