1 (* Copyright (C) 2004-2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
28 let rec_ty uri leftno =
29 let rec_ty = Cic.MutInd (uri,0,[]) in
30 if leftno = 0 then rec_ty else
31 Cic.Appl (rec_ty :: (CicUtil.mk_rels leftno 0))
33 let generate_one_proj uri params paramsno fields t i =
34 let mk_lambdas l start =
35 List.fold_right (fun (name,ty) acc ->
36 Cic.Lambda (Cic.Name name,ty,acc)) l start in
37 let recty = rec_ty uri paramsno in
38 let outtype = Cic.Lambda (Cic.Name "w'", CicSubstitution.lift 1 recty, t) in
40 (Cic.Lambda (Cic.Name "w", recty,
41 Cic.MutCase (uri,0,outtype, Cic.Rel 1,
42 [mk_lambdas fields (Cic.Rel i)]))))
44 let projections_of uri field_names =
45 let buri = UriManager.buri_of_uri uri in
46 let obj,ugraph = CicEnvironment.get_cooked_obj CicUniv.empty_ugraph uri in
48 Cic.InductiveDefinition ([_,_,sort,[_,ty]],params,paramsno,_) ->
49 assert (params = []); (* general case not implemented *)
54 | n,Cic.Prod (Cic.Name name,s,t) ->
55 let leftparams,ty = aux (n - 1,t) in
56 (name,s)::leftparams,ty
65 | Cic.Appl _, [] -> []
66 | Cic.Prod (_,s,t), name::tl -> (name,s)::aux (t,tl)
69 aux ((CicSubstitution.lift 1 ty),field_names)
74 | Cic.Appl _, [] -> []
75 | Cic.Prod (_,s,t), name::tl ->
76 let p = generate_one_proj uri leftparams paramsno fields s i in
77 let puri = UriManager.uri_of_string (buri ^ "/" ^ name ^ ".con") in
80 (CicSubstitution.subst
82 (Cic.Const (puri,[]) ::
83 CicUtil.mk_rels paramsno 2 @ [Cic.Rel 1])
87 aux (List.length fields) (CicSubstitution.lift 2 ty,field_names)