1-- C341A02.A
2 --
3--                             Grant of Unlimited Rights
4--
5--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
6--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
7--     unlimited rights in the software and documentation contained herein.
8--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
9--     this public release, the Government intends to confer upon all
10--     recipients unlimited rights  equal to those held by the Government.
11--     These rights include rights to use, duplicate, release or disclose the
12--     released technical data and computer software in whole or in part, in
13--     any manner and for any purpose whatsoever, and to have or permit others
14--     to do so.
15--
16--                                    DISCLAIMER
17--
18--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
19--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
20--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
21--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
22--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
23--     PARTICULAR PURPOSE OF SAID MATERIAL.
24--*
25 --
26 -- OBJECTIVE:
27 --      Check that class-wide objects can be reassigned with objects from
28 --      the same specific type used to initialize them.
29 --
30 -- TEST DESCRIPTION:
31 --      Define new objects of specific types from within a class. Reassign
32 --      previously declared class-wide objects with the new specific type
33 --      objects. Check that new assignments were performed.
34 --
35 --      The particular root and extended types used in this abstraction are
36 --      defined in foundation code (F341A00.A), and are graphically displayed
37 --      as follows:
38 --
39 --           package Bank
40 --              type Account
41 --                  |
42 --                  |
43 --                  |
44 --               package Checking
45 --                  type Account
46 --                      |
47 --                      |
48 --                      |
49 --                   package Interest_Checking
50 --                          type Account
51 --
52 -- TEST FILES:
53 --      This test depends on the following foundation code:
54 --
55 --         F341A00.A
56 --
57 --      The following files comprise this test:
58 --
59 --      => C341A02.A
60 --
61 --
62-- CHANGE HISTORY:
63--      06 Dec 94   SAIC    ACVC 2.0
64--
65 --!
66
67 with F341A00_0;            -- package Bank
68 with F341A00_1;            -- package Checking
69 with F341A00_2;            -- package Interest_Checking
70 with Report;
71
72 procedure C341A02 is
73
74    package Bank              renames F341A00_0;
75    package Checking          renames F341A00_1;
76    package Interest_Checking renames F341A00_2;
77
78    Max_Accts    : constant := 3;
79    Bank_Balance : Bank.Dollar_Amount := 0.00;
80
81    -- Define and initialize objects of specific types.
82    B_Acct      : aliased Bank.Account := (Current_Balance => 10.00);
83    C_Acct      : aliased Checking.Account          := (100.00, 10.00);
84    IC_Acct     : aliased Interest_Checking.Account := (1000.00, 10.00, 0.030);
85    New_B_Acct  : aliased Bank.Account := (Current_Balance => 20.00);
86    New_C_Acct  : aliased Checking.Account          := (200.00,  20.00);
87    New_IC_Acct : aliased Interest_Checking.Account := (2000.00, 20.00, 0.060);
88
89
90    -- Define and initialize (by direct assignment) objects of a class-wide
91    -- type originating from the root type (Bank.Account).
92
93    type ATM_Card is access all Bank.Account'Class;
94
95    Accounts : array (1 .. Max_Accts) of ATM_Card :=
96      (1 => B_Acct'Access, 2 => C_Acct'Access, 3 => IC_Acct'Access);
97
98    New_Accounts : array (1 .. Max_Accts) of ATM_Card :=
99      (1 => New_B_Acct'Access,
100       2 => New_C_Acct'Access,
101       3 => New_IC_Acct'Access);
102
103    -- Define an account auditing procedure with a class-wide
104    -- variable that can hold a value of any object within the class,
105    -- and once initialized, can hold other values of the same specific type.
106
107    procedure Audit (Num : in     integer;
108                     Amt :    out Bank.Dollar_Amount) is
109       Account_Being_Audited : Bank.Account'Class := Accounts(Num).all;
110       use type Bank.Dollar_Amount;
111    begin
112       Amt := Account_Being_Audited.Current_Balance;
113       -- Reassign class-wide variable to another object of the type used to
114       -- initialize it.
115       Account_Being_Audited := New_Accounts(Num).all;
116       Amt := Amt + Account_Being_Audited.Current_Balance;  -- Reading OUT
117    end Audit;                                              -- parameter.
118
119
120 begin
121
122    Report.Test ("C341A02", "Check that class-wide objects can be "  &
123                            "reassigned with objects from the same " &
124                            "specific type used to initialize them" );
125    Night_Audit:
126    declare
127       use type Bank.Dollar_Amount;
128       Acct_Value : Bank.Dollar_Amount := 0.00;
129    begin
130       -- Perform nightly audit of total funds on deposit in bank.
131       for i in 1 .. Max_Accts loop
132          Audit (i, Acct_Value);
133          Bank_Balance := Bank_Balance + Acct_Value;
134       end loop;
135
136       if Bank_Balance /= 3330.00 then
137          Report.Failed ("Class-wide object processing failed");
138       end if;
139
140    end Night_Audit;
141
142    Report.Result;
143
144 end C341A02;
145
146