1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
-- 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_17_ch_17_03.vhd,v 1.2 2001-10-26 16:29:36 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
entity ch_17_03 is
end entity ch_17_03;
----------------------------------------------------------------
architecture test of ch_17_03 is
begin
process is
type natural_ptr is access natural;
-- code from book:
variable count1, count2 : natural_ptr;
-- end of code from book
begin
-- code from book:
count1 := new natural'(5);
count2 := new natural'(10);
count2 := count1;
count1.all := 20;
-- end of code from book
assert
-- code from book:
count1 = count2
-- end of code from book
;
-- code from book:
count1 := new natural'(30);
count2 := new natural'(30);
-- end of code from book
assert count1 = count2;
assert
-- code from book:
count1.all = count2.all
-- end of code from book
;
-- code from book:
if count1 /= null then
count1.all := count1.all + 1;
end if;
-- end of code from book
wait;
end process;
end architecture test;
|
