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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
(* Extraction to Ocaml : special handling of ascii and strings *)
Require Coq.extraction.Extraction.
Require Import Ascii String.
Extract Inductive ascii => char
[
"(* If this appears, you're using Ascii internals. Please don't *)
(fun (b0,b1,b2,b3,b4,b5,b6,b7) ->
let f b i = if b then 1 lsl i else 0 in
Char.chr (f b0 0 + f b1 1 + f b2 2 + f b3 3 + f b4 4 + f b5 5 + f b6 6 + f b7 7))"
]
"(* If this appears, you're using Ascii internals. Please don't *)
(fun f c ->
let n = Char.code c in
let h i = (n land (1 lsl i)) <> 0 in
f (h 0) (h 1) (h 2) (h 3) (h 4) (h 5) (h 6) (h 7))".
Extract Constant zero => "'\000'".
Extract Constant one => "'\001'".
Extract Constant shift =>
"fun b c -> Char.chr (((Char.code c) lsl 1) land 255 + if b then 1 else 0)".
Extract Inlined Constant ascii_dec => "(=)".
Extract Inlined Constant Ascii.eqb => "(=)".
Extract Inductive string => "char list" [ "[]" "(::)" ].
(*
Definition test := "ceci est un test"%string.
Recursive Extraction test Ascii.zero Ascii.one.
*)
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