module Gen: sig .. end
Generate Random Values
type 'a t = Random.State.t -> 'a
A random generator for values of type 'a
type 'a sized = int -> Random.State.t -> 'a
Random generator with a size bound
val return : 'a -> 'a t
val (>>=) : 'a t -> ('a -> 'b t) -> 'b t
val (<*>) : ('a -> 'b) t -> 'a t -> 'b t
val map : ('a -> 'b) -> 'a t -> 'b t
val map2 : ('a -> 'b -> 'c) -> 'a t -> 'b t -> 'c t
val map3 : ('a -> 'b -> 'c -> 'd) ->
'a t -> 'b t -> 'c t -> 'd t
val map_keep_input : ('a -> 'b) -> 'a t -> ('a * 'b) t
val (>|=) : 'a t -> ('a -> 'b) -> 'b t
val oneof : 'a t list -> 'a t
val oneofl : 'a list -> 'a t
val oneofa : 'a array -> 'a t
val frequency : (int * 'a t) list -> 'a t
val frequencyl : (int * 'a) list -> 'a t
val frequencya : (int * 'a) array -> 'a t
val shuffle_a : 'a array -> unit t
Shuffle the array in place
val shuffle_l : 'a list -> 'a list t
val unit : unit t
val bool : bool t
val float : float t
val pfloat : float t
positive float
val nfloat : float t
negative float
val nat : int t
small nat
val neg_int : int t
negative int
val pint : int t
positive uniform int
val int : int t
uniform int
val small_int : int t
val int_bound : int -> int t
Uniform within 0... bound
val int_range : int -> int -> int t
Uniform within low,high
val (--) : int -> int -> int t
val ui32 : int32 t
val ui64 : int64 t
val list : 'a t -> 'a list t
val list_size : int t -> 'a t -> 'a list t
val list_repeat : int -> 'a t -> 'a list t
val array : 'a t -> 'a array t
val array_size : int t -> 'a t -> 'a array t
val array_repeat : int -> 'a t -> 'a array t
val opt : 'a t -> 'a option t
val pair : 'a t -> 'b t -> ('a * 'b) t
val triple : 'a t ->
'b t -> 'c t -> ('a * 'b * 'c) t
val quad : 'a t ->
'b t ->
'c t -> 'd t -> ('a * 'b * 'c * 'd) t
val char : char t
val printable : char t
val numeral : char t
val string_size : ?gen:char t -> int t -> string t
val string : ?gen:char t -> string t
val small_string : ?gen:char t -> string t
val join : 'a t t -> 'a t
Since NEXT_RELEASE
val sized : 'a sized -> 'a t
val sized_size : int t -> 'a sized -> 'a t
Since NEXT_RELEASE
val fix : ('a sized -> 'a sized) -> 'a sized
Fixpoint; size decreases
Example:
type tree = Leaf of int | Node of tree * tree
let leaf x = Leaf x
let node x y = Node (x,y)
let g = QCheck.Gen.(sized @@ fix
(fun self n -> match n with
| 0 -> map leaf nat
| n ->
frequency
[1, map leaf nat;
2, map2 node (self (n/2)) (self (n/2))]
))
val generate : ?rand:Random.State.t -> n:int -> 'a t -> 'a list
generate ~n g generates n instances of g
val generate1 : ?rand:Random.State.t -> 'a t -> 'a
generate1 g generates one instance of g