Module Random.State

module Random.State: sig .. end

Manipulate the current state of the random generator.

This allows using one or several deterministic PRNGs, even in a multi-threaded program, without interference from other parts of the program.

type t

The type of PRNG states.

val make : int array -> t

Create a new state and initialize it with the given seed.

val make_self_init : unit -> t

Create a new state and initialize it with a system-dependent low-entropy seed.

val copy : t -> t

Return a copy of the given state.

val bits : t -> int

val int : t -> int -> int

val int32 : t -> Int32.t -> Int32.t

val nativeint : t -> Native_int.t -> Native_int.t

val int64 : t -> Int64.t -> Int64.t

val float : t -> float -> float

val bool : t -> bool

val char : t -> char

val enum_bits : t -> unit -> int Enum.t

val enum_int : t -> int -> int Enum.t

val enum_bool : t -> unit -> bool Enum.t

val enum_float : t -> float -> float Enum.t

val enum_int32 : t -> Int32.t -> Int32.t Enum.t

val enum_int64 : t -> Int64.t -> Int64.t Enum.t

val enum_nativeint : t -> Native_int.t -> Native_int.t Enum.t

val enum_char : t -> unit -> char Enum.t

These functions are the same as the basic functions, except that they use (and update) the given PRNG state instead of the default one.

Boilerplate code

S-Expressions

Note: Exceptionnally, the S-Expressions obtained from the following functions are not portable between versions of OCaml. They remain portable between architectures, however.

val t_of_sexp : Sexplib.Sexp.t -> t

val sexp_of_t : t -> Sexplib.Sexp.t