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.
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://cs.unibo.it/helm/.
30 type coercion_search_result =
31 | SomeCoercion of Cic.term list
34 | NotHandled of string Lazy.t
37 let debug_print s = if debug then prerr_endline (Lazy.force s) else ()
39 (* searches a coercion fron src to tgt in the !coercions list *)
40 let look_for_coercion src tgt =
43 let ty,_ = CicTypeChecker.type_of_aux' [] [] con CicUniv.empty_ugraph in
44 let rec count_pi = function
45 | Cic.Prod (_,_,t) -> 1 + count_pi t
49 with Invalid_argument _ -> assert false (* all coercions have an uri *)
51 let rec mk_implicits = function
53 | n -> Cic.Implicit None :: mk_implicits (n-1)
58 (fun (s,t) -> CoercDb.eq_carr s src && CoercDb.eq_carr t tgt) in
64 (sprintf ":-( coercion non trovata da %s a %s"
65 (CoercDb.name_of_carr src)
66 (CoercDb.name_of_carr tgt)));
70 sprintf ":-) TROVATE %d coercion(s) da %s a %s"
72 (CoercDb.name_of_carr src)
73 (CoercDb.name_of_carr tgt)));
79 let cl = List.map CicUtil.term_of_uri ul in
80 let arityl = List.map arity_of cl in
81 let argsl = List.map (fun arity -> mk_implicits (arity - 1)) arityl in
87 | _ -> Cic.Appl (c::args))
92 | CoercDb.EqCarrNotImplemented s -> NotHandled s
93 | CoercDb.EqCarrOnNonMetaClosed -> NotMetaClosed
96 let look_for_coercion src tgt =
97 let src_uri = CoercDb.coerc_carr_of_term src in
98 let tgt_uri = CoercDb.coerc_carr_of_term tgt in
99 look_for_coercion src_uri tgt_uri
101 let is_a_coercion t =
103 let uri = CicUtil.uri_of_term t in
104 CoercDb.is_a_coercion uri
105 with Invalid_argument _ -> false
109 let uri = CicUtil.uri_of_term t in
110 CoercDb.term_of_carr (fst (CoercDb.get_carr uri))
111 with Invalid_argument _ -> assert false (* t must be a coercion *)
115 let uri = CicUtil.uri_of_term t in
116 CoercDb.term_of_carr (snd (CoercDb.get_carr uri))
117 with Invalid_argument _ -> assert false (* t must be a coercion *)
119 let generate_dot_file () =
120 let module Pp = GraphvizPp.Dot in
121 let buf = Buffer.create 10240 in
122 let fmt = Format.formatter_of_buffer buf in
123 Pp.header ~node_attrs:["fontsize", "9"; "width", ".4"; "height", ".4"]
124 ~edge_attrs:["fontsize", "10"] fmt;
125 let l = CoercDb.to_list () in
126 let pp_description carr =
127 match CoercDb.uri_of_carr carr with
130 Pp.node (CoercDb.name_of_carr carr)
131 ~attrs:["href", UriManager.string_of_uri uri] fmt in
133 (fun (src, tgt, cl) ->
134 let src_name = CoercDb.name_of_carr src in
135 let tgt_name = CoercDb.name_of_carr tgt in
140 Pp.edge src_name tgt_name
141 ~attrs:[ "label", UriManager.name_of_uri c;
142 "href", UriManager.string_of_uri c ]