(************************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(*   \VV/  **************************************************************)
(*    //   *      This file is distributed under the terms of the       *)
(*         *       GNU Lesser General Public License Version 2.1        *)
(************************************************************************)

(*i $Id: pretype_errors.mli 10860 2008-04-27 21:39:08Z herbelin $ i*)

(*i*)
open Pp
open Util
open Names
open Term
open Sign
open Environ
open Rawterm
open Inductiveops
(*i*)

(*s The type of errors raised by the pretyper *)

type pretype_error =
  (* Old Case *)
  | CantFindCaseType of constr
  (* Unification *)
  | OccurCheck of existential_key * constr
  | NotClean of existential_key * constr * Evd.hole_kind
  | UnsolvableImplicit of Evd.evar_info * Evd.hole_kind * 
      Evd.unsolvability_explanation option
  | CannotUnify of constr * constr
  | CannotUnifyLocal of constr * constr * constr
  | CannotUnifyBindingType of constr * constr
  | CannotGeneralize of constr
  | NoOccurrenceFound of constr * identifier option
  | CannotFindWellTypedAbstraction of constr * constr list
  (* Pretyping *)
  | VarNotFound of identifier
  | UnexpectedType of constr * constr
  | NotProduct of constr

exception PretypeError of env * pretype_error

val precatchable_exception : exn -> bool

(* Presenting terms without solved evars *)
val nf_evar :  Evd.evar_map -> constr -> constr
val j_nf_evar :  Evd.evar_map -> unsafe_judgment -> unsafe_judgment
val jl_nf_evar :
   Evd.evar_map -> unsafe_judgment list -> unsafe_judgment list
val jv_nf_evar :
   Evd.evar_map -> unsafe_judgment array -> unsafe_judgment array
val tj_nf_evar :
   Evd.evar_map -> unsafe_type_judgment -> unsafe_type_judgment


(* Raising errors *)
val error_actual_type_loc :
  loc -> env ->  Evd.evar_map -> unsafe_judgment -> constr -> 'b

val error_cant_apply_not_functional_loc : 
  loc -> env ->  Evd.evar_map ->
      unsafe_judgment -> unsafe_judgment list -> 'b

val error_cant_apply_bad_type_loc : 
  loc -> env ->  Evd.evar_map -> int * constr * constr -> 
      unsafe_judgment -> unsafe_judgment list -> 'b

val error_case_not_inductive_loc :
  loc -> env ->  Evd.evar_map -> unsafe_judgment -> 'b

val error_ill_formed_branch_loc : 
  loc -> env ->  Evd.evar_map ->
      constr -> int -> constr -> constr -> 'b

val error_number_branches_loc : 
  loc -> env ->  Evd.evar_map ->
      unsafe_judgment -> int -> 'b

val error_ill_typed_rec_body_loc :
  loc -> env ->  Evd.evar_map ->
      int -> name array -> unsafe_judgment array -> types array -> 'b

val error_not_a_type_loc :
  loc -> env -> Evd.evar_map -> unsafe_judgment -> 'b

val error_cannot_coerce : env -> Evd.evar_map -> constr * constr -> 'b

(*s Implicit arguments synthesis errors *)

val error_occur_check : env ->  Evd.evar_map -> existential_key -> constr -> 'b

val error_not_clean :
  env -> Evd.evar_map -> existential_key -> constr -> loc * Evd.hole_kind -> 'b

val error_unsolvable_implicit :
  loc -> env -> Evd.evar_map -> Evd.evar_info -> Evd.hole_kind -> 
      Evd.unsolvability_explanation option -> 'b

val error_cannot_unify : env -> Evd.evar_map -> constr * constr -> 'b

val error_cannot_unify_local : env -> Evd.evar_map -> constr * constr * constr -> 'b

val error_cannot_find_well_typed_abstraction : env -> Evd.evar_map ->
      constr -> constr list -> 'b

(*s Ml Case errors *)

val error_cant_find_case_type_loc :
  loc -> env ->  Evd.evar_map -> constr -> 'b

(*s Pretyping errors *)

val error_unexpected_type_loc :
  loc -> env ->  Evd.evar_map -> constr -> constr -> 'b

val error_not_product_loc :
  loc -> env ->  Evd.evar_map -> constr -> 'b

(*s Error in conversion from AST to rawterms *)

val error_var_not_found_loc : loc -> identifier -> 'b
