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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 camlp4deps: "parsing/grammar.cma" i*)
(* $Id: extraargs.ml4,v 1.5.2.1 2004/07/16 19:30:53 herbelin Exp $ *)
open Pp
open Pcoq
open Genarg
(* Rewriting orientation *)
let _ = Metasyntax.add_token_obj "<-"
let _ = Metasyntax.add_token_obj "->"
let pr_orient _prc _prt = function
| true -> Pp.mt ()
| false -> Pp.str " <-"
ARGUMENT EXTEND orient TYPED AS bool PRINTED BY pr_orient
| [ "->" ] -> [ true ]
| [ "<-" ] -> [ false ]
| [ ] -> [ true ]
END
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