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+(************************************************************************)
+(*  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: evar_refiner.mli,v 1.28.2.1 2004/07/16 19:30:49 herbelin Exp $ i*)
+
+(*i*)
+open Names
+open Term
+open Sign
+open Environ
+open Evd
+open Refiner
+open Proof_type
+(*i*)
+
+type wc = named_context sigma (* for a better reading of the following *)
+
+(* Refinement of existential variables. *)
+
+val rc_of_pfsigma : proof_tree sigma -> wc
+val rc_of_glsigma : goal sigma -> wc
+
+(* A [w_tactic] is a tactic which modifies the a set of evars of which
+   a goal depend, either by instantiating one, or by declaring a new
+   dependent goal *)
+type w_tactic = wc -> wc
+
+val startWalk : goal sigma -> wc * (wc -> tactic)
+
+val extract_decl : evar -> w_tactic
+val restore_decl : evar -> evar_info -> w_tactic
+val w_Declare    : evar -> types -> w_tactic
+val w_Define     : evar -> constr -> w_tactic
+
+val w_Underlying : wc -> evar_map
+val w_env        : wc -> env
+val w_hyps       : wc -> named_context
+val w_whd        : wc -> constr -> constr
+val w_type_of    : wc -> constr -> constr
+val w_add_sign   : (identifier * types) -> w_tactic
+
+val w_whd_betadeltaiota : wc -> constr -> constr
+val w_hnf_constr        : wc -> constr -> constr
+val w_conv_x            : wc -> constr -> constr -> bool
+val w_const_value       : wc -> constant -> constr
+val w_defined_evar      : wc -> existential_key -> bool
+
+val instantiate : int -> constr -> identifier Tacexpr.gsimple_clause -> tactic
+(*
+val instantiate_tac : tactic_arg list -> tactic
+*)
+val instantiate_pf_com : int -> Topconstr.constr_expr -> pftreestate -> pftreestate