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-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
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-- This file is part of VESTs (Vhdl tESTs).
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-- VESTs is free software; you can redistribute it and/or modify it
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-- under the terms of the GNU General Public License as published by the
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-- Free Software Foundation; either version 2 of the License, or (at
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-- your option) any later version. 
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-- VESTs is distributed in the hope that it will be useful, but WITHOUT
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-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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-- for more details. 
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-- You should have received a copy of the GNU General Public License
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-- along with VESTs; if not, write to the Free Software Foundation,
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-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
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-- ---------------------------------------------------------------------
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--
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-- $Id: ch_17_ch_17_03.vhd,v 1.2 2001-10-26 16:29:36 paw Exp $
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-- $Revision: 1.2 $
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--
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-- ---------------------------------------------------------------------
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entity ch_17_03 is
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end entity ch_17_03;
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----------------------------------------------------------------
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architecture test of ch_17_03 is
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begin
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  process is
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            type natural_ptr is access natural;
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          -- code from book:
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          variable count1, count2 : natural_ptr;
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          -- end of code from book
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  begin
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    -- code from book:
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    count1 := new natural'(5);
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    count2 := new natural'(10);
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    count2 := count1;
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    count1.all := 20;
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    -- end of code from book
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    assert
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      -- code from book:
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      count1 = count2
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      -- end of code from book
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      ;
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    -- code from book:
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    count1 := new natural'(30);
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    count2 := new natural'(30);
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    -- end of code from book
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    assert count1 = count2;
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    assert
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      -- code from book:
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      count1.all = count2.all
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      -- end of code from book
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      ;
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    -- code from book:
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    if count1 /= null then
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      count1.all := count1.all + 1;
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    end if;
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    -- end of code from book
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    wait;
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  end process;
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end architecture test;
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