package base

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

Ordering is intended to make code that matches on the result of a comparison more concise and easier to read. For example, instead of writing:

let r = compare x y in
if r < 0 then
  ...
else if r = 0 then
  ...
else
  ...

you could simply write:

match Ordering.of_int (compare x y) with
| Less -> ...
| Equal -> ...
| Greater -> ...
type t =
  1. | Less
  2. | Equal
  3. | Greater
include sig ... end
val compare : t -> t -> int
val all : t list
val hash_fold_t : Hash.state -> t -> Hash.state
val hash : t -> Hash.hash_value
val t_of_sexp : Sexp.t -> t
val sexp_of_t : t -> Sexp.t
include Equal.S with type t := t
val equal : t Equal.equal
val of_int : int -> t

of_int n is:

      Less     if n < 0
      Equal    if n = 0
      Greater  if n > 0
val to_int : t -> int

to_int t is:

      Less     -> -1
      Equal    -> 0
      Greater  -> 1

It can be useful when writing a comparison function to allow one to return Ordering.t values and transform them to ints later.

module Export : sig ... end
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