1 (* Copyright (C) 2000, 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.
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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.
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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/.
28 type coercion_search_result =
29 | SomeCoercion of Cic.term
32 | NotHandled of string Lazy.t
35 let debug_print s = if debug then prerr_endline (Lazy.force s) else ()
37 (* searches a coercion fron src to tgt in the !coercions list *)
38 let look_for_coercion src tgt =
42 (fun (s,t) -> CoercDb.eq_carr s src && CoercDb.eq_carr t tgt)
48 (sprintf ":-( coercion non trovata da %s a %s"
49 (CoercDb.name_of_carr src)
50 (CoercDb.name_of_carr tgt)));
54 sprintf ":-) TROVATA 1 coercion da %s a %s: %s"
55 (CoercDb.name_of_carr src)
56 (CoercDb.name_of_carr tgt)
57 (UriManager.name_of_uri u)));
58 SomeCoercion (CicUtil.term_of_uri u)
61 sprintf ":-/ TROVATE %d coercion(s) da %s a %s, prendo la prima: %s"
63 (CoercDb.name_of_carr src)
64 (CoercDb.name_of_carr tgt)
65 (UriManager.name_of_uri u)));
66 SomeCoercion (CicUtil.term_of_uri u)
68 | CoercDb.EqCarrNotImplemented s -> NotHandled s
69 | CoercDb.EqCarrOnNonMetaClosed -> NotMetaClosed
72 let look_for_coercion src tgt =
73 let src_uri = CoercDb.coerc_carr_of_term src in
74 let tgt_uri = CoercDb.coerc_carr_of_term tgt in
75 look_for_coercion src_uri tgt_uri
79 let uri = CicUtil.uri_of_term t in
80 CoercDb.is_a_coercion uri
81 with Invalid_argument _ -> false
85 let uri = CicUtil.uri_of_term t in
86 CoercDb.term_of_carr (fst (CoercDb.get_carr uri))
87 with Invalid_argument _ -> assert false (* t must be a coercion *)
91 let uri = CicUtil.uri_of_term t in
92 CoercDb.term_of_carr (snd (CoercDb.get_carr uri))
93 with Invalid_argument _ -> assert false (* t must be a coercion *)