Merge PR #11529: [build] Consolidate stdlib's .v files under a single directory.

Reviewed-by: Zimmi48

1 files changed, 15 insertions, 0 deletions

diff --git a/theories/extraction/ExtrHaskellNatInt.v b/theories/extraction/ExtrHaskellNatInt.v
new file mode 100644
index 0000000000..267322d9ed
--- /dev/null
+++ b/theories/extraction/ExtrHaskellNatInt.v
@@ -0,0 +1,15 @@
+(** Extraction of [nat] into Haskell's [Int] *)
+
+Require Coq.extraction.Extraction.
+
+Require Import Arith.
+Require Import ExtrHaskellNatNum.
+
+(**
+ * Disclaimer: trying to obtain efficient certified programs
+ * by extracting [nat] into [Int] is definitively *not* a good idea.
+ * See comments in [ExtrOcamlNatInt.v].
+ *)
+
+Extract Inductive nat => "Prelude.Int" [ "0" "Prelude.succ" ]
+  "(\fO fS n -> if n Prelude.== 0 then fO () else fS (n Prelude.- 1))".