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+
+-- Copyright (C) 2001 Bill Billowitch.
+
+-- Some of the work to develop this test suite was done with Air Force
+-- support.  The Air Force and Bill Billowitch assume no
+-- responsibilities for this software.
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+-- for more details. 
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+-- ---------------------------------------------------------------------
+--
+-- $Id: tc2028.vhd,v 1.2 2001-10-26 16:30:15 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+ENTITY c07s02b04x00p01n01i02028ent IS
+END c07s02b04x00p01n01i02028ent;
+
+ARCHITECTURE c07s02b04x00p01n01i02028arch OF c07s02b04x00p01n01i02028ent IS
+
+BEGIN
+  TESTING: PROCESS
+    type     SWITCH_LEVEL is ('0', '1', 'X');
+    subtype  LOGIC_SWITCH is SWITCH_LEVEL range '0' to '1';
+    variable LOGICV  : LOGIC_SWITCH := '0';
+  BEGIN
+    LOGICV := LOGICV - '0';
+    assert FALSE 
+      report "***FAILED TEST: c07s02b04x00p01n01i02028 - The adding operators + and - are predefined for any numeric type." 
+      severity ERROR;
+    wait;
+  END PROCESS TESTING;
+
+END c07s02b04x00p01n01i02028arch;