+
+ (** XXX WARNING: non-reentrant *)
+type coerc_carr = Uri of UriManager.uri | Sort of Cic.sort | Term of Cic.term
+exception EqCarrNotImplemented of string Lazy.t
+exception EqCarrOnNonMetaClosed
+val eq_carr: coerc_carr -> coerc_carr -> bool
+val coerc_carr_of_term: Cic.term -> coerc_carr
+val name_of_carr: coerc_carr -> string
+
+val use_coercions: bool ref (** initial status is true *)