(*i $Id$ i*)

(*i*)
open Names
open Sign
open Term
open Environ
open Evd
open Rawterm
open Evarutil
(*i*)

type meta_map = (int * unsafe_judgment) list
type var_map = (identifier * unsafe_judgment) list

(* Generic call to the interpreter from rawconstr to constr, failing
   unresolved holes in the rawterm cannot be instantiated.

   In [understand_gen sigma env varmap metamap typopt raw],

   sigma : initial set of existential variables (typically dependent subgoals)
   varmap : partial subtitution of variables (used for the tactic language)
   metamap : partial subtitution of meta (used for the tactic language)
   typopt : is not None, this is the expected type for raw (used to define evars)
*)
val understand_gen :
  'a evar_map -> env -> var_map -> meta_map 
    -> expected_type:(constr option) -> rawconstr -> constr


(* Generic call to the interpreter from rawconstr to constr, turning
   unresolved holes into metas. Returns also the typing context of
   these metas. Work as [understand_gen] for the rest. *)
val understand_gen_tcc :
  'a evar_map -> env -> var_map -> meta_map 
    -> constr option -> rawconstr -> (int * constr) list * constr

(* Standard call to get a constr from a rawconstr, resolving implicit args *)
val understand : 'a evar_map -> env -> rawconstr -> constr

(* Idem but the rawconstr is intended to be a type *)
val understand_type : 'a evar_map -> env -> rawconstr -> constr

(* Idem but returns the judgment of the understood term *)
val understand_judgment : 'a evar_map -> env -> rawconstr -> unsafe_judgment

(* Idem but returns the judgment of the understood type *)
val understand_type_judgment : 'a evar_map -> env -> rawconstr 
  -> unsafe_type_judgment

(*i*)
(* Internal of Pretyping...
 * Unused outside, but useful for debugging
 *)
val pretype : 
  type_constraint -> env -> 'a evar_defs ->
    (identifier * unsafe_judgment) list -> (int * unsafe_judgment) list ->
    rawconstr -> unsafe_judgment

val pretype_type : 
  val_constraint -> env -> 'a evar_defs ->
    (identifier * unsafe_judgment) list -> (int * unsafe_judgment) list ->
    rawconstr -> unsafe_type_judgment
(*i*)