1 (* Copyright (C) 2003-2005, 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
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9 * as published by the Free Software Foundation; either version 2
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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
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19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
30 module TC = CicTypeChecker
31 module PEH = ProofEngineHelpers
32 module E = CicEnvironment
33 module UM = UriManager
36 (* fresh name generator *****************************************************)
40 if i <= 0 then assert false else
41 let c = name.[pred i] in
42 if c >= '0' && c <= '9' then aux (pred i)
43 else Str.string_before name i, Str.string_after name i
45 let before, after = aux (String.length name) in
46 let i = if after = "" then -1 else int_of_string after in
50 C.Name (if i < 0 then s else s ^ string_of_int i)
52 let mk_fresh_name context (name, k) =
53 let rec aux i = function
55 | Some (C.Name s, _) :: entries ->
57 if m = name && j >= i then aux (succ j) entries else aux i entries
58 | _ :: entries -> aux i entries
62 let mk_fresh_name context = function
63 | C.Anonymous -> C.Anonymous
64 | C.Name s -> mk_fresh_name context (split s)
66 (* helper functions *********************************************************)
68 let rec list_map_cps g map = function
72 let g tl = g (hd :: tl) in
79 let compose f g x = f (g x)
81 let fst3 (x, _, _) = x
84 try let t, _, _, _ = Rf.type_of_aux' [] c t Un.empty_ugraph in t
86 Printf.eprintf "REFINE EROR: %s\n" (Printexc.to_string e);
87 Printf.eprintf "Ref: context: %s\n" (Pp.ppcontext c);
88 Printf.eprintf "Ref: term : %s\n" (Pp.ppterm t);
92 try let ty, _ = TC.type_of_aux' [] c t Un.empty_ugraph in ty
94 Printf.eprintf "TC: context: %s\n" (Pp.ppcontext c);
95 Printf.eprintf "TC: term : %s\n" (Pp.ppterm t);
99 match PEH.split_with_whd (c, t) with
100 | (_, hd) :: _, _ -> hd
104 match get_tail c (get_type c (get_type c t)) with
105 | C.Sort C.Prop -> true
109 let is_sort = function
113 let is_unsafe h (c, t) = true
115 let is_not_atomic = function
121 | C.MutConstruct _ -> false
124 let is_atomic t = not (is_not_atomic t)
126 let get_ind_type uri tyno =
127 match E.get_obj Un.empty_ugraph uri with
128 | C.InductiveDefinition (tys, _, lpsno, _), _ -> lpsno, List.nth tys tyno
131 let get_default_eliminator context uri tyno ty =
132 let _, (name, _, _, _) = get_ind_type uri tyno in
133 let ext = match get_tail context (get_type context ty) with
134 | C.Sort C.Prop -> "_ind"
135 | C.Sort C.Set -> "_rec"
136 | C.Sort C.CProp -> "_rec"
137 | C.Sort (C.Type _) -> "_rect"
139 Printf.eprintf "CicPPP get_default_eliminator: %s\n" (Pp.ppterm t);
142 let buri = UM.buri_of_uri uri in
143 let uri = UM.uri_of_string (buri ^ "/" ^ name ^ ext ^ ".con") in
146 let get_ind_parameters c t =
147 let ty = get_type c t in
148 let ps = match get_tail c ty with
150 | C.Appl (C.MutInd _ :: args) -> args
153 let disp = match get_tail c (get_type c ty) with
160 let cic = D.deannotate_term
162 (* Ensuring Barendregt convenction ******************************************)
164 let rec add_entries map c = function
167 let sname, w = map hd in
168 let entry = Some (Cic.Name sname, C.Decl w) in
169 add_entries map (entry :: c) tl
172 try match List.nth c (pred i) with
173 | Some (Cic.Name sname, _) -> sname
176 | Failure _ -> assert false
177 | Invalid_argument _ -> assert false
180 let get_fix_decl (sname, i, w, v) = sname, w in
181 let get_cofix_decl (sname, w, v) = sname, w in
182 let rec bc c = function
183 | C.LetIn (name, v, t) ->
184 let name = mk_fresh_name c name in
185 let entry = Some (name, C.Def (v, None)) in
186 let v, t = bc c v, bc (entry :: c) t in
188 | C.Lambda (name, w, t) ->
189 let name = mk_fresh_name c name in
190 let entry = Some (name, C.Decl w) in
191 let w, t = bc c w, bc (entry :: c) t in
192 C.Lambda (name, w, t)
193 | C.Prod (name, w, t) ->
194 let name = mk_fresh_name c name in
195 let entry = Some (name, C.Decl w) in
196 let w, t = bc c w, bc (entry :: c) t in
199 let vs = List.map (bc c) vs in
201 | C.MutCase (uri, tyno, u, v, ts) ->
202 let u, v, ts = bc c u, bc c v, List.map (bc c) ts in
203 C.MutCase (uri, tyno, u, v, ts)
205 let t, u = bc c t, bc c u in
207 | C.Fix (i, fixes) ->
208 let d = add_entries get_fix_decl c fixes in
209 let bc_fix (sname, i, w, v) = (sname, i, bc c w, bc d v) in
210 let fixes = List.map bc_fix fixes in
212 | C.CoFix (i, cofixes) ->
213 let d = add_entries get_cofix_decl c cofixes in
214 let bc_cofix (sname, w, v) = (sname, bc c w, bc d v) in
215 let cofixes = List.map bc_cofix cofixes in
222 let get_fix_decl (id, sname, i, w, v) = sname, cic w in
223 let get_cofix_decl (id, sname, w, v) = sname, cic w in
224 let rec bc c = function
225 | C.ALetIn (id, name, v, t) ->
226 let name = mk_fresh_name c name in
227 let entry = Some (name, C.Def (cic v, None)) in
228 let v, t = bc c v, bc (entry :: c) t in
229 C.ALetIn (id, name, v, t)
230 | C.ALambda (id, name, w, t) ->
231 let name = mk_fresh_name c name in
232 let entry = Some (name, C.Decl (cic w)) in
233 let w, t = bc c w, bc (entry :: c) t in
234 C.ALambda (id, name, w, t)
235 | C.AProd (id, name, w, t) ->
236 let name = mk_fresh_name c name in
237 let entry = Some (name, C.Decl (cic w)) in
238 let w, t = bc c w, bc (entry :: c) t in
239 C.AProd (id, name, w, t)
240 | C.AAppl (id, vs) ->
241 let vs = List.map (bc c) vs in
243 | C.AMutCase (id, uri, tyno, u, v, ts) ->
244 let u, v, ts = bc c u, bc c v, List.map (bc c) ts in
245 C.AMutCase (id, uri, tyno, u, v, ts)
246 | C.ACast (id, t, u) ->
247 let t, u = bc c t, bc c u in
249 | C.AFix (id, i, fixes) ->
250 let d = add_entries get_fix_decl c fixes in
251 let bc_fix (id, sname, i, w, v) = (id, sname, i, bc c w, bc d v) in
252 let fixes = List.map bc_fix fixes in
253 C.AFix (id, i, fixes)
254 | C.ACoFix (id, i, cofixes) ->
255 let d = add_entries get_cofix_decl c cofixes in
256 let bc_cofix (id, sname, w, v) = (id, sname, bc c w, bc d v) in
257 let cofixes = List.map bc_cofix cofixes in
258 C.ACoFix (id, i, cofixes)
259 | C.ARel (id1, id2, i, sname) ->
260 let sname = get_sname c i in
261 C.ARel (id1, id2, i, sname)