diff options
author | Enrico Tassi <gareuselesinge@debian.org> | 2015-11-13 11:31:34 +0100 |
---|---|---|
committer | Enrico Tassi <gareuselesinge@debian.org> | 2015-11-13 11:31:34 +0100 |
commit | 2280477a96e19ba5060de2d48dcc8fd7c8079d22 (patch) | |
tree | 074182834cb406d1304aec4233718564a9c06ba1 /plugins/extraction/ExtrHaskellNatInteger.v | |
parent | 0aa2544d04dbd4b6ee665b551ed165e4fb02d2fa (diff) |
Imported Upstream version 8.5~beta3+dfsg
Diffstat (limited to 'plugins/extraction/ExtrHaskellNatInteger.v')
-rw-r--r-- | plugins/extraction/ExtrHaskellNatInteger.v | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/plugins/extraction/ExtrHaskellNatInteger.v b/plugins/extraction/ExtrHaskellNatInteger.v new file mode 100644 index 00000000..038f0ed8 --- /dev/null +++ b/plugins/extraction/ExtrHaskellNatInteger.v @@ -0,0 +1,13 @@ +(** Extraction of [nat] into Haskell's [Integer] *) + +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))". |