(* identity_relocation_list_for_metavariable i canonical_context         *)
(* returns the identity relocation list, which is the list               *)
(* [Rel 1 ; ... ; Rel n] where n = List.length [canonical_context]       *)
val identity_relocation_list_for_metavariable :
  ?start: int -> 'a option list -> Cic.term option list

(* Returns the first meta whose number is above the *)
(* number of the higher meta.                       *)
val new_meta : Cic.metasenv -> int

(** [mk_implicit metasenv context]
 * add a fresh metavariable to the given metasenv, using given context
 * @return the new metasenv and the index of the added conjecture *)
val mk_implicit: Cic.metasenv -> Cic.context -> Cic.metasenv * int

(** [mk_implicit metasenv context] create n fresh metavariables *)
val n_fresh_metas:  
  Cic.metasenv -> Cic.context -> int -> Cic.metasenv * Cic.term list

(** [mk_implicit metasenv context] takes in input a list of uri and
creates a fresh explicit substitution *)
val fresh_subst:  
  Cic.metasenv -> 
    Cic.context -> 
      UriManager.uri list -> 
        Cic.metasenv * (Cic.term Cic.explicit_named_substitution)

(** as above, but the fresh metavariable represents a type *)
val mk_implicit_type: Cic.metasenv -> Cic.context -> Cic.metasenv * int

val expand_implicits:
  Cic.metasenv -> Cic.context -> Cic.term ->
    Cic.metasenv * Cic.term