Stuff moved from old Matita.

[helm.git] / matita / components / library / coercDb.mli

diff --git a/matita/components/library/coercDb.mli b/matita/components/library/coercDb.mli
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+(* Copyright (C) 2000, HELM Team.
+ * 
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ * 
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA  02111-1307, USA.
+ * 
+ * For details, see the HELM World-Wide-Web page,
+ * http://cs.unibo.it/helm/.
+ *)
+
+
+type coerc_carr = private 
+  | Uri of UriManager.uri (* const, mutind, mutconstr *)
+  | Sort of Cic.sort (* Prop, Set, Type *) 
+  | Fun of int
+  | Dead
+;;
+  
+val eq_carr: ?exact:bool -> coerc_carr -> coerc_carr -> bool
+val string_of_carr: coerc_carr -> string
+
+(* takes a term in whnf ~delta:false and a desired ariety *)
+val coerc_carr_of_term: Cic.term -> int -> coerc_carr 
+
+type coerc_db
+val empty_coerc_db : coerc_db
+val dump: unit -> coerc_db
+val restore: coerc_db -> unit
+
+val to_list:
+  coerc_db -> 
+    (coerc_carr * coerc_carr * (UriManager.uri * int * int) list) list
+
+(* src carr, tgt carr, uri, saturations, coerced position 
+ * invariant:
+ *   if the constant pointed by uri has n argments
+ *   n = coerced position + saturations + FunClass arity
+ *)
+
+type saturations = int
+type coerced_pos = int
+type coercion_entry = 
+  coerc_carr * coerc_carr * UriManager.uri * saturations * coerced_pos
+val add_coercion: coercion_entry -> unit
+val remove_coercion: (coercion_entry -> bool) -> unit
+
+val find_coercion: 
+  (coerc_carr * coerc_carr -> bool) -> (UriManager.uri * int) list 
+    
+val is_a_coercion: Cic.term -> coercion_entry option
+
+val prefer: UriManager.uri -> unit