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.
12 * HELM is distributed in the hope that it will be useful,
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 exception AlreadyDefined of UriManager.uri
30 let auxiliary_lemmas_hashtbl = UriManager.UriHashtbl.create 29
32 (* uri |--> (derived_coercions_in_the_coercion_DB, derived_coercions_in_lib)
34 * in case of remove_coercion uri, the first component is removed from the
35 * coercion DB, while the second is passed to remove_obj (and is not [] only if
36 * add_coercion is called with add_composites
38 let coercion_hashtbl = UriManager.UriHashtbl.create 3
40 let merge_coercions obj =
42 let rec aux2 = (fun (u,t) -> u,aux t)
44 | C.Rel _ | C.Sort _ as t -> t
45 | C.Meta _ | C.Implicit _ -> assert false
46 | C.Cast (te,ty) -> C.Cast (aux te, aux ty)
47 | C.Prod (name,so,dest) ->
48 C.Prod (name, aux so, aux dest)
49 | C.Lambda (name,so,dest) ->
50 C.Lambda (name, aux so, aux dest)
51 | C.LetIn (name,so,dest) ->
52 C.LetIn (name, aux so, aux dest)
53 | (Cic.Appl [ c1 ; (Cic.Appl [c2; head]) ]) as t when
54 CoercGraph.is_a_coercion c1 && CoercGraph.is_a_coercion c2 ->
55 let source_carr = CoercGraph.source_of c2 in
56 let tgt_carr = CoercGraph.target_of c1 in
57 (match CoercGraph.look_for_coercion source_carr tgt_carr
59 | CoercGraph.SomeCoercion c -> Cic.Appl [ c ; head ]
60 | _ -> assert false) (* the composite coercion must exist *)
61 | C.Appl l -> C.Appl (List.map aux l)
62 | C.Var (uri,exp_named_subst) ->
63 let exp_named_subst = List.map aux2 exp_named_subst in
64 C.Var (uri, exp_named_subst)
65 | C.Const (uri,exp_named_subst) ->
66 let exp_named_subst = List.map aux2 exp_named_subst in
67 C.Const (uri, exp_named_subst)
68 | C.MutInd (uri,tyno,exp_named_subst) ->
69 let exp_named_subst = List.map aux2 exp_named_subst in
70 C.MutInd (uri,tyno,exp_named_subst)
71 | C.MutConstruct (uri,tyno,consno,exp_named_subst) ->
72 let exp_named_subst = List.map aux2 exp_named_subst in
73 C.MutConstruct (uri,tyno,consno,exp_named_subst)
74 | C.MutCase (uri,tyno,out,te,pl) ->
75 let pl = List.map aux pl in
76 C.MutCase (uri,tyno,aux out,aux te,pl)
78 let fl = List.map (fun (name,idx,ty,bo)->(name,idx,aux ty,aux bo)) fl in
80 | C.CoFix (fno, fl) ->
81 let fl = List.map (fun (name,ty,bo) -> (name, aux ty, aux bo)) fl in
85 | C.Constant (id, body, ty, params, attrs) ->
89 | Some body -> Some (aux body)
92 C.Constant (id, body, ty, params, attrs)
93 | C.Variable (name, body, ty, params, attrs) ->
97 | Some body -> Some (aux body)
100 C.Variable (name, body, ty, params, attrs)
101 | C.CurrentProof (_name, _conjectures, _body, _ty, _params, _attrs) ->
103 | C.InductiveDefinition (indtys, params, leftno, attrs) ->
106 (fun (name, ind, arity, cl) ->
107 let arity = aux arity in
108 let cl = List.map (fun (name, ty) -> (name,aux ty)) cl in
109 (name, ind, arity, cl))
112 C.InductiveDefinition (indtys, params, leftno, attrs)
114 let uris_of_obj uri =
115 let innertypesuri = UriManager.innertypesuri_of_uri uri in
116 let bodyuri = UriManager.bodyuri_of_uri uri in
117 let univgraphuri = UriManager.univgraphuri_of_uri uri in
118 innertypesuri,bodyuri,univgraphuri
120 let paths_and_uris_of_obj uri ~basedir =
121 let basedir = basedir ^ "/xml" in
122 let innertypesuri, bodyuri, univgraphuri = uris_of_obj uri in
123 let innertypesfilename = Str.replace_first (Str.regexp "^cic:") ""
124 (UriManager.string_of_uri innertypesuri) ^ ".xml.gz" in
125 let innertypespath = basedir ^ "/" ^ innertypesfilename in
126 let xmlfilename = Str.replace_first (Str.regexp "^cic:/") ""
127 (UriManager.string_of_uri uri) ^ ".xml.gz" in
128 let xmlpath = basedir ^ "/" ^ xmlfilename in
129 let xmlbodyfilename = Str.replace_first (Str.regexp "^cic:/") ""
130 (UriManager.string_of_uri uri) ^ ".body.xml.gz" in
131 let xmlbodypath = basedir ^ "/" ^ xmlbodyfilename in
132 let xmlunivgraphfilename = Str.replace_first (Str.regexp "^cic:/") ""
133 (UriManager.string_of_uri univgraphuri) ^ ".xml.gz" in
134 let xmlunivgraphpath = basedir ^ "/" ^ xmlunivgraphfilename in
135 xmlpath, xmlbodypath, innertypespath, bodyuri, innertypesuri,
136 xmlunivgraphpath, univgraphuri
138 let save_object_to_disk ~basedir uri obj ugraph univlist =
139 let ensure_path_exists path =
140 let dir = Filename.dirname path in
143 (* generate annobj, ids_to_inner_sorts and ids_to_inner_types *)
144 let annobj = Cic2acic.plain_acic_object_of_cic_object obj in
148 uri ?ids_to_inner_sorts:None ~ask_dtd_to_the_getter:false annobj
150 let xmlpath, xmlbodypath, innertypespath, bodyuri, innertypesuri,
151 xmlunivgraphpath, univgraphuri =
152 paths_and_uris_of_obj uri basedir
154 List.iter HExtlib.mkdir (List.map Filename.dirname [xmlpath]);
155 (* now write to disk *)
156 ensure_path_exists xmlpath;
157 Xml.pp ~gzip:true xml (Some xmlpath);
158 CicUniv.write_xml_of_ugraph xmlunivgraphpath ugraph univlist;
159 (* we return a list of uri,path we registered/created *)
161 (univgraphuri,xmlunivgraphpath) ::
162 (* now the optional body, both write and register *)
163 (match bodyxml,bodyuri with
165 | Some bodyxml,Some bodyuri->
166 ensure_path_exists xmlbodypath;
167 Xml.pp ~gzip:true bodyxml (Some xmlbodypath);
168 [bodyuri, xmlbodypath]
173 let profiler = HExtlib.profile "add_obj.typecheck_obj" in
174 fun uri obj -> profiler.HExtlib.profile (CicTypeChecker.typecheck_obj uri) obj
177 let profiler = HExtlib.profile "add_obj.index_obj" in
179 profiler.HExtlib.profile (fun uri -> MetadataDb.index_obj ~dbd ~uri) uri
181 let add_single_obj uri obj ~basedir =
183 if List.mem `Generated (CicUtil.attributes_of_obj obj) &&
184 not (CoercGraph.is_a_coercion (Cic.Const (uri, [])))
190 let dbd = LibraryDb.instance () in
191 if CicEnvironment.in_library uri then
192 raise (AlreadyDefined uri)
194 typecheck_obj uri obj; (* 1 *)
195 let _, ugraph, univlist =
196 CicEnvironment.get_cooked_obj_with_univlist CicUniv.empty_ugraph uri in
198 index_obj ~dbd ~uri; (* 2 must be in the env *)
201 let new_stuff = save_object_to_disk ~basedir uri obj ugraph univlist in
204 (Printf.sprintf "%s defined" (UriManager.string_of_uri uri))
206 List.iter HExtlib.safe_remove (List.map snd new_stuff); (* -3 *)
209 ignore(LibraryDb.remove_uri uri); (* -2 *)
212 CicEnvironment.remove_obj uri; (* -1 *)
216 let remove_single_obj uri =
217 let derived_uris_of_uri uri =
218 let innertypesuri, bodyuri, univgraphuri = uris_of_obj uri in
219 innertypesuri::univgraphuri::(match bodyuri with None -> [] | Some u -> [u])
223 (if UriManager.uri_is_ind uri then LibraryDb.xpointers_of_ind uri else []) @
224 derived_uris_of_uri uri
229 let file = Http_getter.resolve' uri in
230 HExtlib.safe_remove file;
231 HExtlib.rmdir_descend (Filename.dirname file)
232 with Http_getter_types.Key_not_found _ -> ());
233 ignore (LibraryDb.remove_uri uri);
234 (*CoercGraph.remove_coercion uri;*)
235 CicEnvironment.remove_obj uri)
238 (*** GENERATION OF AUXILIARY LEMMAS ***)
240 let generate_elimination_principles ~basedir uri =
244 let uri,obj = CicElim.elim_of ~sort uri 0 in
245 add_single_obj uri obj ~basedir;
247 with CicElim.Can_t_eliminate -> ()
250 List.iter elim [ Cic.Prop; Cic.Set; (Cic.Type (CicUniv.fresh ())) ];
253 List.iter remove_single_obj !uris;
256 (* COERCIONS ***********************************************************)
258 let remove_all_coercions () =
259 UriManager.UriHashtbl.clear coercion_hashtbl;
260 CoercDb.remove_coercion (fun (_,_,u1) -> true)
262 let add_coercion ~basedir ~add_composites uri =
264 let coer = CicUtil.term_of_uri uri in
265 CicTypeChecker.type_of_aux' [] [] coer CicUniv.empty_ugraph
267 (* we have to get the source and the tgt type uri
268 * in Coq syntax we have already their names, but
269 * since we don't support Funclass and similar I think
270 * all the coercion should be of the form
272 * So we should be able to extract them from the coercion type
274 * Currently only (_:T1)T2 is supported.
275 * should we saturate it with metas in case we insert it?
278 let extract_last_two_p ty =
279 let rec aux = function
280 | Cic.Prod( _, src, Cic.Prod (n,t1,t2)) ->
282 (* not implemented: aux (Cic.Prod(n,t1,t2)) *)
283 | Cic.Prod( _, src, tgt) -> src, tgt
288 let ty_src, ty_tgt = extract_last_two_p coer_ty in
289 let src_uri = CoercDb.coerc_carr_of_term (CicReduction.whd [] ty_src) in
290 let tgt_uri = CoercDb.coerc_carr_of_term (CicReduction.whd [] ty_tgt) in
291 let new_coercions = CicCoercion.close_coercion_graph src_uri tgt_uri uri in
292 let composite_uris = List.map (fun (_,_,uri,_) -> uri) new_coercions in
295 (fun (src,tgt,uri,_) -> CoercDb.add_coercion (src,tgt,uri))
297 CoercDb.add_coercion (src_uri, tgt_uri, uri);
298 (* add the composites obj and they eventual lemmas *)
300 if add_composites then
302 (fun acc (_,_,uri,obj) ->
303 add_single_obj ~basedir uri obj;
305 composite_uris new_coercions
309 (* store that composite_uris are related to uri. the first component is the
310 * stuff in the DB while the second is stuff for remove_obj *)
311 UriManager.UriHashtbl.add coercion_hashtbl uri
312 (composite_uris,if add_composites then composite_uris else []);
315 let remove_coercion uri =
317 let (composites_in_db, composites_in_lib) =
318 UriManager.UriHashtbl.find coercion_hashtbl uri
320 UriManager.UriHashtbl.remove coercion_hashtbl uri;
321 CoercDb.remove_coercion (fun (_,_,u) -> UriManager.eq uri u);
322 (* remove from the DB *)
324 (fun u -> CoercDb.remove_coercion (fun (_,_,u1) -> UriManager.eq u u1))
326 (* remove composites from the lib *)
327 List.iter remove_single_obj composites_in_lib
329 Not_found -> () (* mhh..... *)
332 let generate_projections ~basedir uri fields =
334 let projections = CicRecord.projections_of uri (List.map fst fields) in
337 (fun (uri, name, bo) (_name, coercion) ->
340 CicTypeChecker.type_of_aux' [] [] bo CicUniv.empty_ugraph in
341 let attrs = [`Class `Projection; `Generated] in
342 let obj = Cic.Constant (name,Some bo,ty,[],attrs) in
344 add_single_obj ~basedir uri obj;
347 add_coercion ~basedir ~add_composites:true uri
351 uris := uri :: composites @ !uris
353 CicTypeChecker.TypeCheckerFailure s ->
355 ("Unable to create projection " ^ name ^ " cause: " ^ Lazy.force s);
356 | CicEnvironment.Object_not_found uri ->
357 let depend = UriManager.name_of_uri uri in
359 ("Unable to create projection " ^ name ^ " because it requires " ^
361 ) projections fields;
364 List.iter remove_single_obj !uris;
368 let add_obj uri obj ~basedir =
369 add_single_obj uri obj ~basedir;
374 | Cic.Constant _ -> ()
375 | Cic.InductiveDefinition (_,_,_,attrs) ->
376 uris := !uris @ generate_elimination_principles ~basedir uri;
377 let rec get_record_attrs =
380 | (`Class (`Record fields))::_ -> Some fields
381 | _::tl -> get_record_attrs tl
383 (match get_record_attrs attrs with
384 | None -> () (* not a record *)
386 uris := !uris @ (generate_projections ~basedir uri fields))
388 | Cic.Variable _ -> assert false
390 UriManager.UriHashtbl.add auxiliary_lemmas_hashtbl uri !uris;
393 List.iter remove_single_obj !uris;
399 let res = UriManager.UriHashtbl.find auxiliary_lemmas_hashtbl uri in
400 UriManager.UriHashtbl.remove auxiliary_lemmas_hashtbl uri;
403 Not_found -> [] (*assert false*)
405 List.iter remove_single_obj (uri::uris)