X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Fcic_unification%2FcoercGraph.ml;h=d99fc6f798f67f72ccbee796adc50b8bd0db1474;hb=97c2d258a5c524eb5c4b85208899d80751a2c82f;hp=b3bc8d8b0e7ba5b94284102bfc4a68c9db1941bb;hpb=fa40e1051d879aac77bd576d4a71d937a8d029a9;p=helm.git

diff --git a/helm/ocaml/cic_unification/coercGraph.ml b/helm/ocaml/cic_unification/coercGraph.ml
index b3bc8d8b0..d99fc6f79 100644
--- a/helm/ocaml/cic_unification/coercGraph.ml
+++ b/helm/ocaml/cic_unification/coercGraph.ml
@@ -43,10 +43,23 @@ let look_for_coercion src tgt =
         (fun (s,t) -> CoercDb.eq_carr s src && CoercDb.eq_carr t tgt) 
     in
     match l with
-    | [] -> debug_print (lazy ":( coercion non trovata"); NoCoercion
+    | [] -> 
+        debug_print 
+          (lazy 
+            (sprintf ":-( coercion non trovata da %s a %s" 
+              (CoercDb.name_of_carr src) 
+              (CoercDb.name_of_carr tgt)));
+        NoCoercion
+    | [u] -> 
+        debug_print (lazy (
+          sprintf ":-) TROVATA 1 coercion da %s a %s: %s" 
+            (CoercDb.name_of_carr src) 
+            (CoercDb.name_of_carr tgt)
+            (UriManager.name_of_uri u)));
+        SomeCoercion (CicUtil.term_of_uri u)
     | u::_ -> 
         debug_print (lazy (
-          sprintf ":) TROVATE %d coercion(s) da %s a %s, prendo la prima: %s" 
+          sprintf ":-/ TROVATE %d coercion(s) da %s a %s, prendo la prima: %s" 
             (List.length l)
             (CoercDb.name_of_carr src) 
             (CoercDb.name_of_carr tgt)