X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Flibrary%2FcoercDb.mli;h=83e61dbfba2f708097e12e7b04dcef6e6ffda710;hb=84e6cbe962c9a534be48542c098d7bb0d90be9a1;hp=3071aecc4eb724064849f21da4fc8bcc8314d099;hpb=5c1b44dfefa085fbb56e23047652d3650be9d855;p=helm.git

diff --git a/helm/software/components/library/coercDb.mli b/helm/software/components/library/coercDb.mli
index 3071aecc4..83e61dbfb 100644
--- a/helm/software/components/library/coercDb.mli
+++ b/helm/software/components/library/coercDb.mli
@@ -24,49 +24,44 @@
  *)
 
 
- (** THIS MODULE SHOULD BE USED ONLY BY CoercGraph/CicCoercion/librarySync
-  * 
-  *   and may be merged with CicCoercion...
-  *  
-  * **)
-
-
-  (** XXX WARNING: non-reentrant *)
-type coerc_carr = 
+type coerc_carr = private 
   | Uri of UriManager.uri (* const, mutind, mutconstr *)
   | Sort of Cic.sort (* Prop, Set, Type *) 
-  | Term of Cic.term (* nothing supported *)
   | Fun of int
+  | Dead
 ;;
   
-exception EqCarrNotImplemented of string Lazy.t
-exception EqCarrOnNonMetaClosed
 val eq_carr: ?exact:bool -> coerc_carr -> coerc_carr -> bool
-val coerc_carr_of_term: Cic.term -> coerc_carr
-val name_of_carr: coerc_carr -> string
-val uri_of_carr: coerc_carr -> UriManager.uri option
+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 
 
 val to_list:
   unit -> 
-    (coerc_carr * coerc_carr * (UriManager.uri * int) list) list
+    (coerc_carr * coerc_carr * (UriManager.uri * int * int) list) list
 
 type coerc_db
+val empty_coerc_db : coerc_db
 val dump: unit -> coerc_db
 val restore: coerc_db -> unit
 
-val add_coercion:
-  coerc_carr * coerc_carr * UriManager.uri * int -> unit
+(* src carr, tgt carr, uri, saturations, coerced position 
+ * invariant:
+ *   if the constant pointed by uri has n argments
+ *   n = coerced position + saturations + FunClass arity
+ *)
 
-val remove_coercion:
-  (coerc_carr * coerc_carr * UriManager.uri * int -> bool) -> unit
+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: UriManager.uri -> bool
-val is_a_coercion': Cic.term -> bool
-val is_a_coercion_to_funclass: Cic.term -> int option
-val get_carr: UriManager.uri -> coerc_carr * coerc_carr
-
-val term_of_carr: coerc_carr -> Cic.term
+val is_a_coercion: Cic.term -> coercion_entry option
 
+val prefer: UriManager.uri -> unit