(* ||M|| This file is part of HELM, an Hypertextual, Electronic ||A|| Library of Mathematics, developed at the Computer Science ||T|| Department, University of Bologna, Italy. ||I|| ||T|| HELM is free software; you can redistribute it and/or ||A|| modify it under the terms of the GNU General Public License \ / version 2 or (at your option) any later version. \ / This software is distributed as is, NO WARRANTY. V_______________________________________________________________ *) exception TypeError of Brg.message (* arguments: expected type, inferred type, typed term *) val assert_conversion: (unit -> 'a) -> ?si:bool -> ?rt:bool -> Brg.context -> Brg.term -> Brg.term -> Brg.term -> 'a