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+(************************************************************************)
+(* v * The Coq Proof Assistant / The Coq Development Team *)
+(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012 *)
+(* \VV/ **************************************************************)
+(* // * This file is distributed under the terms of the *)
+(* * GNU Lesser General Public License Version 2.1 *)
+(************************************************************************)
+
+open Util
+open Pp
+open Names
+open Tacexpr
+
+type alias = KerName.t
+
+let alias_map = Summary.ref ~name:"tactic-alias"
+ (KNmap.empty : (DirPath.t * glob_tactic_expr) KNmap.t)
+
+let register_alias key dp tac =
+ alias_map := KNmap.add key (dp, tac) !alias_map
+
+let interp_alias key =
+ try KNmap.find key !alias_map
+ with Not_found -> Errors.anomaly (str "Unknown tactic alias: " ++ KerName.print key)