1-- C37208A.ADA     (RA #534/1)
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-- FOR A TYPE WITH DEFAULT DISCRIMINANT VALUES, CHECK THAT A
26-- DISCRIMINANT CONSTRAINT CAN BE OMITTED IN:
27
28     -- AN OBJECT DECLARATION, AND HENCE ASSIGNMENTS TO THE OBJECT CAN
29     -- CHANGE ITS DISCRIMINANTS;
30
31     -- A COMPONENT_DECLARATION IN A RECORD TYPE DEFINITION, AND HENCE
32     -- ASSIGNMENTS TO THE COMPONENT CAN CHANGE THE VALUE OF ITS
33     -- DISCRIMINANTS;
34
35     -- A SUBTYPE INDICATION IN AN ARRAY TYPE DEFINITION, AND HENCE
36     -- ASSIGNMENTS TO ONE OF THE COMPONENTS CAN CHANGE ITS
37     -- DISCRIMINANT VALUES;
38
39     -- A FORMAL PARAMETER OF A SUBPROGRAM; EXCEPT FOR PARAMETERS OF
40     -- MODE IN, THE 'CONSTRAINED ATTRIBUTE OF THE ACTUAL PARAMETER
41     -- BECOMES THE 'CONSTRAINED ATTRIBUTE OF THE FORMAL PARAMETER;
42     -- FOR IN OUT AND OUT PARAMETERS, IF THE 'CONSTRAINED ATTRIBUTE IS
43     -- FALSE, ASSIGNMENTS TO THE FORMAL PARAMETER CAN CHANGE THE
44     -- DISCRIMINANTS OF THE ACTUAL PARAMETER; IF THE 'CONSTRAINED
45     -- ATTRIBUTE IS TRUE, ASSIGNNMENTS THAT ATTEMPT TO CHANGE THE
46     -- DISCRIMINANTS OF THE ACTUAL PARAMETER RAISE CONSTRAINT_ERROR.
47
48-- ASL 7/23/81
49-- EDS 7/16/98    AVOID OPTIMIZATION
50
51WITH REPORT;
52PROCEDURE C37208A IS
53
54     USE REPORT;
55
56BEGIN
57     TEST ("C37208A","DISCRIMINANT CONSTRAINT CAN BE OMITTED " &
58           "FROM OBJECT DECLARATION, COMPONENT DECLARATION, SUBTYPE " &
59           "INDICATION OR FORMAL SUBPROGRAM PARAMETER, IF THE TYPE " &
60           "HAS DEFAULT DISCRIMINANTS");
61
62     DECLARE
63          TYPE REC1(DISC : INTEGER := 7) IS
64               RECORD
65                    NULL;
66               END RECORD;
67
68          TYPE REC2 IS
69               RECORD
70                    COMP : REC1;
71               END RECORD;
72
73          R : REC2;
74          U1,U2,U3 : REC1 := (DISC => 3);
75          C1,C2,C3 : REC1(3) := (DISC => 3);
76          ARR : ARRAY(INTEGER RANGE 1..10) OF REC1;
77          ARR2 : ARRAY (1..10) OF REC1(4);
78
79          PROCEDURE PROC(P_IN : IN REC1;
80                         P_OUT : OUT REC1;
81                         P_IN_OUT : IN OUT REC1;
82                         CONSTR : IN BOOLEAN) IS
83          BEGIN
84               IF P_OUT'CONSTRAINED /= CONSTR
85                    OR P_IN_OUT'CONSTRAINED /= CONSTR THEN
86                    FAILED ("CONSTRAINED ATTRIBUTES DO NOT MATCH " &
87                              "FOR ACTUAL AND FORMAL PARAMETERS");
88               END IF;
89
90               IF P_IN'CONSTRAINED /= IDENT_BOOL(TRUE) THEN
91                    FAILED ("'CONSTRAINED IS FALSE FOR IN " &
92                            "PARAMETER");
93               END IF;
94
95               IF NOT CONSTR THEN     -- UNCONSTRAINED ACTUAL PARAM
96                    P_OUT := (DISC => IDENT_INT(0));
97                    P_IN_OUT := (DISC => IDENT_INT(0));
98               ELSE
99                    BEGIN
100                         P_OUT := (DISC => IDENT_INT(0));
101                         FAILED ("DISCRIMINANT OF CONSTRAINED ACTUAL " &
102                                 "PARAMETER ILLEGALLY CHANGED - 1");
103                    EXCEPTION
104                         WHEN CONSTRAINT_ERROR =>
105                              NULL;
106                         WHEN OTHERS =>
107                              FAILED ("WRONG EXCEPTION - 1");
108                    END;
109
110                    BEGIN
111                         P_IN_OUT := (DISC => IDENT_INT(0));
112                         FAILED ("DISCRIMINANT OF CONSTRAINED ACTUAL " &
113                                 "PARAMETER ILLEGALLY CHANGED - 2");
114                    EXCEPTION
115                         WHEN CONSTRAINT_ERROR => NULL;
116                         WHEN OTHERS =>
117                              FAILED ("WRONG EXCEPTION - 2");
118                    END;
119               END IF;
120          END PROC;
121     BEGIN
122          IF U1.DISC /= IDENT_INT(3) THEN
123               FAILED ("INITIAL DISCRIMINANT VALUE WRONG - U1");
124          END IF;
125
126          U1 := (DISC => IDENT_INT(5));
127          IF U1.DISC /= 5 THEN
128               FAILED ("ASSIGNMENT FAILED FOR OBJECT");
129          END IF;
130
131          IF R.COMP.DISC /= IDENT_INT(7) THEN
132               FAILED ("DEFAULT DISCRIMINANT VALUE WRONG - R");
133          END IF;
134
135          R.COMP := (DISC => IDENT_INT(5));
136          IF R.COMP.DISC /= 5 THEN
137               FAILED ("ASSIGNMENT FAILED FOR RECORD COMPONENT");
138          END IF;
139
140          FOR I IN 1..10 LOOP
141               IF ARR(I).DISC /= IDENT_INT(7) THEN
142                    FAILED ("DEFAULT DISCRIMINANT VALUE WRONG - ARR");
143               END IF;
144          END LOOP;
145
146          ARR(3) := (DISC => IDENT_INT(5));
147          IF ARR(3).DISC /= 5 THEN
148               FAILED ("ASSIGNMENT FAILED FOR ARRAY COMPONENT");
149          END IF;
150
151          IF ARR /= (1..2|4..10 => (DISC => 7), 3 => (DISC => 5)) THEN
152               FAILED ("MODIFIED WRONG COMPONENTS");
153          END IF;
154
155          PROC(C1,C2,C3,IDENT_BOOL(TRUE));
156          PROC(U1,U2,U3,IDENT_BOOL(FALSE));
157          IF U2.DISC /= 0 OR U3.DISC /= 0 THEN
158               FAILED ("ASSIGNMENT TO UNCONSTRAINED ACTUAL PARAMETER " &
159                       "FAILED TO CHANGE DISCRIMINANT");
160          END IF;
161
162          PROC(ARR(1), ARR(3), ARR(4), FALSE);
163          IF ARR(3).DISC /= 0 OR ARR(4).DISC /= 0 THEN
164               FAILED ("ARRAY COMPONENT ASSIGNMENTS DIDN'T CHANGE " &
165                       "DISCRIMINANT OF COMPONENT");
166          END IF;
167
168          PROC (ARR2(2), ARR2(5), ARR2(10), TRUE);
169     END;
170
171     RESULT;
172END C37208A;
173