blob: 4c5c71f58a3b085b354d20964748feb289ef5d23 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
(** Extraction of [nat] into Haskell's [Integer] *)
Require Coq.extraction.Extraction.
Require Import Arith.
Require Import ExtrHaskellNatNum.
(**
* Disclaimer: trying to obtain efficient certified programs
* by extracting [nat] into [Integer] isn't necessarily a good idea.
* See comments in [ExtrOcamlNatInt.v].
*)
Extract Inductive nat => "Prelude.Integer" [ "0" "Prelude.succ" ]
"(\fO fS n -> if n Prelude.== 0 then fO () else fS (n Prelude.- 1))".
|
