package core

  1. Overview
  2. Docs
package core
Legend:
Library
Module
Module type
Parameter
Class
Class type

The difference between Hashable and Hashable_t functors is that the former's result type doesn't contain type t and the latter does. Therefore, Hashable can't be used to combine two pairs into 4-tuple. but Hashable_t can. On the other hand result of Hashable_t cannot be combined with Comparable.

example: module Four_ints = Tuple.Hashable_t (Tuple.Hashable_t (Int)(Int)) (Tuple.Hashable_t (Int)(Int))

If instead we used Hashable compiler would complain that the input to outer functor doesn't have type t.

On the other hand: module Foo = struct type t = String.t * Int.t include Tuple.Comparable (String) (Int) include Tuple.Hashable (String) (Int) end

If we used Hashable_t above, the compiler would complain that we have two types t defined.

Unfortunately, it is not possible to define just one functor that could be used in both cases.

Parameters

Signature

include Sexplib0.Sexpable.S with type t := Make(S1)(S2).t
val t_of_sexp : Sexplib0__.Sexp.t -> Make(S1)(S2).t
val sexp_of_t : Make(S1)(S2).t -> Sexplib0__.Sexp.t
include Hashable.S with type t := Make(S1)(S2).t
include Ppx_compare_lib.Comparable.S with type t := Make(S1)(S2).t
val compare : Make(S1)(S2).t Base__Ppx_compare_lib.compare
include Ppx_hash_lib.Hashable.S with type t := Make(S1)(S2).t
val hash_fold_t : Make(S1)(S2).t Base__Ppx_hash_lib.hash_fold
val hash : Make(S1)(S2).t -> Base__Ppx_hash_lib.Std.Hash.hash_value
val hashable : Make(S1)(S2).t Core__.Hashtbl.Hashable.t
module Table : Hashtbl.S with type key = Make(S1)(S2).t
module Hash_set : Hash_set.S with type elt = Make(S1)(S2).t
OCaml

Innovation. Community. Security.

GitHub Discord Twitter Peertube RSS
About
Changelog Releases Industrial Users Academic Users Why OCaml
Ecosystem
Packages Community Events OCaml Planet Jobs
Resources
Install OCaml Get Started Platform Tools Language Manual Standard Library API Books Exercises Papers OCaml Playground Logo
Policies
Carbon Footprint Governance Privacy Code of Conduct