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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))". |