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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* $Id: q_util.ml4,v 1.2.2.2 2004/07/16 19:30:41 herbelin Exp $ *)
(* This file defines standard combinators to build ml expressions *)
open Util
let not_impl name x =
let desc =
if Obj.is_block (Obj.repr x) then
"tag = " ^ string_of_int (Obj.tag (Obj.repr x))
else
"int_val = " ^ string_of_int (Obj.magic x)
in
failwith ("<Q_util." ^ name ^ ", not impl: " ^ desc)
let rec patt_of_expr e =
let loc = MLast.loc_of_expr e in
match e with
| <:expr< $e1$.$e2$ >> -> <:patt< $patt_of_expr e1$.$patt_of_expr e2$ >>
| <:expr< $e1$ $e2$ >> -> <:patt< $patt_of_expr e1$ $patt_of_expr e2$ >>
| <:expr< loc >> -> <:patt< _ >>
| <:expr< $lid:s$ >> -> <:patt< $lid:s$ >>
| <:expr< $uid:s$ >> -> <:patt< $uid:s$ >>
| <:expr< $str:s$ >> -> <:patt< $str:s$ >>
| <:expr< $anti:e$ >> -> <:patt< $anti:patt_of_expr e$ >>
| _ -> not_impl "patt_of_expr" e
let mlexpr_of_list f l =
List.fold_right
(fun e1 e2 ->
let e1 = f e1 in
let loc = (fst (MLast.loc_of_expr e1), snd (MLast.loc_of_expr e2)) in
<:expr< [$e1$ :: $e2$] >>)
l (let loc = dummy_loc in <:expr< [] >>)
let mlexpr_of_pair m1 m2 (a1,a2) =
let e1 = m1 a1 and e2 = m2 a2 in
let loc = (fst (MLast.loc_of_expr e1), snd (MLast.loc_of_expr e2)) in
<:expr< ($e1$, $e2$) >>
let mlexpr_of_triple m1 m2 m3 (a1,a2,a3)=
let e1 = m1 a1 and e2 = m2 a2 and e3 = m3 a3 in
let loc = (fst (MLast.loc_of_expr e1), snd (MLast.loc_of_expr e3)) in
<:expr< ($e1$, $e2$, $e3$) >>
(* We don't give location for tactic quotation! *)
let loc = dummy_loc
let mlexpr_of_bool = function
| true -> <:expr< True >>
| false -> <:expr< False >>
let mlexpr_of_int n = <:expr< $int:string_of_int n$ >>
let mlexpr_of_string s = <:expr< $str:s$ >>
let mlexpr_of_option f = function
| None -> <:expr< None >>
| Some e -> <:expr< Some $f e$ >>
|
