Module Base.OrderingSource

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 -> ...
Sourcetype t =
  1. | Less
  2. | Equal
  3. | Greater
Sourceval compare : t -> t -> int
Sourceval hash_fold_t : Hash.state -> t -> Hash.state
Sourceval hash : t -> Hash.hash_value
include Sexplib0.Sexpable.S with type t := t
Sourceval t_of_sexp : Sexplib0.Sexp.t -> t
Sourceval sexp_of_t : t -> Sexplib0.Sexp.t
Sourceval t_sexp_grammar : t Sexplib0.Sexp_grammar.t
Sourceval all : t list
include Equal.S with type t := t
Sourceval equal : t Equal.equal
Sourceval of_int : int -> t

of_int n is:

      Less     if n < 0
      Equal    if n = 0
      Greater  if n > 0
Sourceval 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.

Sourcemodule Export : sig ... end