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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
-- C37207A.ADA
-- Grant of Unlimited Rights
--
-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
-- unlimited rights in the software and documentation contained herein.
-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
-- this public release, the Government intends to confer upon all
-- recipients unlimited rights equal to those held by the Government.
-- These rights include rights to use, duplicate, release or disclose the
-- released technical data and computer software in whole or in part, in
-- any manner and for any purpose whatsoever, and to have or permit others
-- to do so.
--
-- DISCLAIMER
--
-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
-- PARTICULAR PURPOSE OF SAID MATERIAL.
--*
-- OBJECTIVE:
-- FOR A TYPE WITH OR WITHOUT DEFAULT DISCRIMINANT VALUES, CHECK
-- THAT A DISCRIMINANT CONSTRAINT CAN BE SUPPLIED IN THE FOLLOWING
-- CONTEXTS AND HAS THE PROPER EFFECT:
-- IN A 1) OBJECT_DECLARATION, 2) COMPONENT_DECLARATION OR
-- 3) SUBTYPE INDICATION OF AN ARRAY_TYPE_DEFINITION, AND HENCE,
-- ASSIGNMENTS CANNOT ATTEMPT TO CHANGE THE SPECIFIED DISCRIMINANT
-- VALUES WITHOUT RAISING CONSTRAINT_ERROR
-- 4) IN AN ACCESS_TYPE_DEFINITION, AND HENCE, ACCESS VALUES
-- OF THIS ACCESS TYPE CANNOT BE ASSIGNED NON-NULL VALUES
-- DESIGNATING OBJECTS WITH DIFFERENT DISCRIMINANT VALUES.
-- 5) IN AN ALLOCATOR, AND THE ALLOCATED OBJECT HAS THE SPECIFIED
-- DISCRIMINANT VALUES.
-- 6) IN A FORMAL PARAMETER DECLARATION OF A SUBPROGRAM, AND
-- HENCE, ASSIGNMENTS TO THE FORMAL PARAMETER CANNOT ATTEMPT TO
-- CHANGE THE DISCRIMINANT VALUES WITHOUT RAISING CONSTRAINT_ERROR,
-- CONSTRAINED IS TRUE, AND IF ACTUAL PARAMETERS HAVE DISCRIMINANT
-- VALUES DIFFERENT FROM THE SPECIFIED ONES, CONSTRAINT_ERROR IS
-- RAISED.
-- HISTORY:
-- ASL 07/24/81
-- RJW 08/28/86 CORRECTED SYNTAX ERRORS.
-- JLH 08/07/87 ADDED CODE TO PREVENT DEAD VARIABLE OPTIMIZATION.
-- EDS 07/16/98 AVOID OPTIMIZATION
WITH REPORT; USE REPORT;
PROCEDURE C37207A IS
BEGIN
TEST ("C37207A","DISCRIMINANT CONSTRAINT CAN BE SUPPLIED TO " &
"DECLARATIONS AND DEFINITIONS USING TYPES WITH OR WITHOUT " &
"DEFAULT DISCRIMINANT VALUES");
DECLARE
TYPE REC1 (DISC : INTEGER := 5) IS
RECORD
NULL;
END RECORD;
TYPE REC2 (DISC : INTEGER) IS
RECORD
NULL;
END RECORD;
OBJ1 : REC1(6); -- 1.
OBJ2 : REC2(6); -- 1.
BADOBJ1 : REC1(7); -- 1.
BADOBJ2 : REC2(7); -- 1.
TYPE REC3 IS
RECORD
COMP1 : REC1(6); -- 2.
COMP2 : REC2(6); -- 2.
END RECORD;
OBJ3 : REC3;
TYPE ARR1 IS ARRAY (1..10) OF REC1(6); -- 3.
TYPE ARR2 IS ARRAY (1..10) OF REC2(6); -- 3.
A1 : ARR1;
A2 : ARR2;
TYPE REC1_NAME IS ACCESS REC1(6); -- 4.
TYPE REC2_NAME IS ACCESS REC2(6); -- 4.
ACC1 : REC1_NAME;
ACC2 : REC2_NAME;
SUBTYPE REC16 IS REC1(6);
SUBTYPE REC26 IS REC2(6);
PROCEDURE PROC (P1 : IN OUT REC16; -- 6.
P2 : IN OUT REC26) IS -- 6.
BEGIN
IF NOT (P1'CONSTRAINED AND P2'CONSTRAINED) THEN -- 6.
FAILED ("'CONSTRAINED ATTRIBUTE INCORRECT FOR " &
"CONSTRAINED FORMAL PARAMETERS");
END IF;
BEGIN
P1 := (DISC => 7); -- 6.
FAILED ("CONSTRAINT_ERROR NOT RAISED UPON " &
"ATTEMPT TO CHANGE DISCRIMINANT OF " &
"CONSTRAINED FORMAL PARAMETER " &
INTEGER'IMAGE(P1.DISC));
EXCEPTION
WHEN CONSTRAINT_ERROR => NULL;
WHEN OTHERS => FAILED ("WRONG EXCEPTION (1)");
END;
BEGIN
P2 := (DISC => 7); -- 6.
FAILED ("CONSTRAINT_ERROR NOT RAISED UPON " &
"ATTEMPT TO CHANGE DISCRIMINANT OF " &
"CONSTRAINED FORMAL PARAMETER " &
INTEGER'IMAGE(P2.DISC));
EXCEPTION
WHEN CONSTRAINT_ERROR => NULL;
WHEN OTHERS => FAILED ("WRONG EXCEPTION (2)");
END;
END PROC;
BEGIN
---------------------------------------------------------------
BEGIN
OBJ1 := (DISC => IDENT_INT(7)); -- 1.
FAILED ("CONSTRAINT_ERROR NOT RAISED UPON " &
"ATTEMPT TO CHANGE DISCRIMINANT OF " &
"CONSTRAINED OBJECT");
IF OBJ1 = (DISC => 7) THEN
COMMENT ("PREVENTING DEAD VARIABLE OPTIMIZATION");
END IF;
EXCEPTION
WHEN CONSTRAINT_ERROR => NULL;
WHEN OTHERS => FAILED ("WRONG EXCEPTION (3)");
END;
---------------------------------------------------------------
BEGIN
OBJ3 := ((DISC => IDENT_INT(7)), -- 2.
(DISC => IDENT_INT(7))); -- 2.
FAILED ("CONSTRAINT_ERROR NOT RAISED UPON " &
"ATTEMPT TO CHANGE DISCRIMINANT OF " &
"CONSTRAINED RECORD COMPONENT");
IF OBJ3 = ((DISC => 7), (DISC => 7)) THEN
COMMENT ("PREVENTING DEAD VARIABLE OPTIMIZATION");
END IF;
EXCEPTION
WHEN CONSTRAINT_ERROR => NULL;
WHEN OTHERS => FAILED ("WRONG EXCEPTION (4)");
END;
--------------------------------------------------------------
BEGIN
A2(2) := (DISC => IDENT_INT(7)); -- 3.
FAILED ("CONSTRAINT_ERROR NOT RAISED UPON " &
"ATTEMPT TO CHANGE DISCRIMINANT OF " &
"CONSTRAINED ARRAY COMPONENT");
IF A2(2) = (DISC => 7) THEN
COMMENT ("PREVENTING DEAD VARIABLE OPTIMIZATION");
END IF;
EXCEPTION
WHEN CONSTRAINT_ERROR => NULL;
WHEN OTHERS => FAILED ("WRONG EXCEPTION (5)");
END;
--------------------------------------------------------------
BEGIN
ACC1 := NEW REC1(DISC => IDENT_INT(7)); -- 4.
FAILED ("CONSTRAINT_ERROR NOT RAISED UPON " &
"ATTEMPT TO ASSIGN INCOMPATIBLE OBJECT " &
"TO ACCESS VARIABLE");
IF ACC1 = NEW REC1(DISC => 7) THEN
COMMENT ("PREVENTING DEAD VARIABLE OPTIMIZATION");
END IF;
EXCEPTION
WHEN CONSTRAINT_ERROR => NULL;
WHEN OTHERS => FAILED ("WRONG EXCEPTION (6)");
END;
----------------------------------------------------------------
ACC1 := NEW REC1(DISC => IDENT_INT(6)); -- OK.
BEGIN
ACC1.ALL := BADOBJ1; -- 5.
FAILED ("CONSTRAINT_ERROR NOT RAISED UPON " &
"ATTEMPT TO ASSIGN INCOMPATIBLE OBJECT " &
"TO ACCESSED OBJECT");
IF ACC1.ALL = BADOBJ1 THEN
COMMENT ("PREVENT DEAD VARIABLE OPTIMIZATION");
END IF;
EXCEPTION
WHEN CONSTRAINT_ERROR => NULL;
WHEN OTHERS => FAILED ("WRONG EXCEPTION (7)");
END;
-----------------------------------------------------------------
PROC (OBJ1,OBJ2); -- OK.
BEGIN
PROC (BADOBJ1,BADOBJ2); -- 6.
FAILED ("CONSTRAINT_ERROR NOT RAISED UPON " &
"PASSING OF CONSTRAINED ACTUAL " &
"PARAMETERS TO DIFFERENTLY CONSTRAINED " &
"FORMAL PARAMETERS");
EXCEPTION
WHEN CONSTRAINT_ERROR => NULL;
WHEN OTHERS => FAILED ("WRONG EXCEPTION (8)");
END;
---------------------------------------------------------------
END;
RESULT;
END C37207A;
|
