package logtk

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package logtk
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Hashing Combinators (for hashconsing)

A compositional interface for hashing values of type 'a by providing a 'a -> int function. Hashing composite structures is done by combining the hashes of individual components using combine or combine2; Helpers for hashing lists, options, arrays, tuples, etc. are provided.

type 'a t = 'a -> int
val bool : bool t
val int : int t
val string : string t
val combine : 'a t -> int -> 'a -> int
val pair : 'a t -> 'b t -> ('a * 'b) t
val opt : 'a t -> 'a option t
val list : 'a t -> 'a list t
val array : 'a t -> 'a array t
val seq : 'a t -> 'a Iter.t t

Orderless versions

val list_comm : 'a t -> 'a list t
val array_comm : 'a t -> 'a array t
val combine2 : int -> int -> int
val combine3 : int -> int -> int -> int
val combine4 : int -> int -> int -> int -> int
val combine5 : int -> int -> int -> int -> int -> int
val poly : 'a t

the regular polymorphic hash function