CristalCaveGem » LustreC » Lustrec-Tests

-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc

-- 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: ch_04_ch_04_09.vhd,v 1.2 2001-10-26 16:29:37 paw Exp $

-- $Revision: 1.2 $

--

-- ---------------------------------------------------------------------

entity ch_04_09 is

end entity ch_04_09;

----------------------------------------------------------------

architecture test of ch_04_09 is

begin

  process_04_3_c : process is

                             -- code from book:

                             subtype name is string(1 to 20);

                           type display_string is array (integer range 0 to 19) of character;

                           variable item_name : name;

                           variable display : display_string;

                           --

                           subtype big_endian_upper_halfword is bit_vector(0 to 15);

                           subtype little_endian_upper_halfword is bit_vector(31 downto 16);

                           variable big : big_endian_upper_halfword;

                           variable little : little_endian_upper_halfword;

                           -- end of code from book

  begin

    -- error: Incompatible types for assignment

    -- display := item_name;  -- ilegal

    item_name := (others => 'A');

    little := x"AAAA";

    -- code from book:

    display := display_string(item_name);

    --

    big := little;

    little := big;

    -- end of code from book

    wait;

  end process process_04_3_c;

  ----------------

end architecture test;