X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fcic_unification%2FcoercGraph.mli;h=abc94688c5a6b27897ca1c63b2fc8a1946e45efd;hb=54551ce5acf37f04972291e774d14371a671a8c7;hp=62e4844997e72f73bc02ae8e0c99fecaaee7f264;hpb=5d010a40c726d9a7eceeb35e70e41a158eb63c70;p=helm.git

diff --git a/helm/software/components/cic_unification/coercGraph.mli b/helm/software/components/cic_unification/coercGraph.mli
index 62e484499..abc94688c 100644
--- a/helm/software/components/cic_unification/coercGraph.mli
+++ b/helm/software/components/cic_unification/coercGraph.mli
@@ -32,18 +32,14 @@ type coercion_search_result =
      (* to apply the coercion it is sufficient to unify the last coercion
         argument (that is a Meta) with the term to be coerced *)
   | SomeCoercion of (Cic.metasenv * Cic.term * Cic.term) list
+  | SomeCoercionToTgt of (Cic.metasenv * Cic.term * Cic.term) list
   | NoCoercion
-  | NotMetaClosed
-  | NotHandled of string Lazy.t
+  | NotHandled
 
 val look_for_coercion :
   Cic.metasenv -> Cic.substitution -> Cic.context ->
    Cic.term -> Cic.term -> coercion_search_result
 
-val look_for_coercion' :
-  Cic.metasenv -> Cic.substitution -> Cic.context ->
-   CoercDb.coerc_carr -> CoercDb.coerc_carr -> coercion_search_result
-
 (* checks if term is a constant or 
  * a constant applyed that is marked with (`Class `Coercion) *)
 val is_composite: Cic.term -> bool
@@ -52,7 +48,13 @@ val source_of: Cic.term -> Cic.term
 
 val generate_dot_file: unit -> string
 
+(* given the Appl contents returns the argument of the head coercion *)
+val coerced_arg: Cic.term list -> (Cic.term * int) option
+
+(* returns: (carr,menv,(saturated coercion,last arg)option,idem) list *)
 val meets : 
+  Cic.metasenv -> Cic.substitution -> Cic.context ->
   CoercDb.coerc_carr -> CoercDb.coerc_carr -> 
-    CoercDb.coerc_carr list
+    (CoercDb.coerc_carr * Cic.metasenv * 
+      (Cic.term * Cic.term) option * (Cic.term * Cic.term) option) list