1-- C37208B.ADA
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 A GENERIC FORMAL
27-- PARAMETER, AND HENCE, FOR BOTH IN AND IN OUT PARAMETERS, THE
28-- 'CONSTRAINED ATTRIBUTE OF THE ACTUAL PARAMETER BECOMES THE
29-- 'CONSTRAINED ATTRIBUTE OF THE FORMAL PARAMETER, AND, FOR IN
30-- OUT PARAMETERS, IF THE 'CONSTRAINED ATTRIBUTE IS FALSE,
31-- ASSIGNMENTS TO THE FORMAL PARAMETERS CAN CHANGE THE
32-- DISCRIMINANTS OF THE ACTUAL PARAMETER; IF THE 'CONSTRAINED
33-- ATTRIBUTE IS  TRUE, ASSIGNMENTS THAT ATTEMPT TO CHANGE THE
34-- DISCRIMINANTS OF THE ACTUAL PARAMETER RAISE CONSTRAINT_ERROR.
35
36-- ASL 7/29/81
37-- VKG 1/20/83
38-- EDS 7/16/98    AVOID OPTIMIZATION
39
40WITH REPORT;
41PROCEDURE C37208B IS
42
43     USE REPORT;
44
45BEGIN
46     TEST ("C37208B","FOR TYPES WITH DEFAULT DISCRIMINANT " &
47            "VALUES, DISCRIMINANT CONSTRAINTS CAN BE OMITTED " &
48            "IN GENERIC FORMAL PARAMETERS, AND THE " &
49            "'CONSTRAINED ATTRIBUTE HAS CORRECT VALUES " &
50            "DEPENDING ON THE ACTUAL PARAMETERS");
51
52     DECLARE
53          TYPE REC(DISC : INTEGER := 7) IS
54               RECORD
55                    NULL;
56               END RECORD;
57
58          KC : CONSTANT REC(3) := (DISC => 3);
59          KU : CONSTANT REC := (DISC => 3);
60          OBJC1,OBJC2 : REC(3) := (DISC => 3);
61          OBJU1,OBJU2 : REC := (DISC => 3);
62
63          GENERIC
64               P_IN1 : REC;
65               P_IN2 : REC;
66               P_IN_OUT : IN OUT REC;
67               STATUS : BOOLEAN;
68          PROCEDURE PROC;
69
70          PROCEDURE PROC IS
71          BEGIN
72
73               IF P_IN1'CONSTRAINED /= TRUE  OR
74                  P_IN2'CONSTRAINED /= TRUE  OR
75                  P_IN_OUT'CONSTRAINED /= STATUS
76               THEN
77
78                    FAILED ("'CONSTRAINED ATTRIBUTES DO NOT MATCH " &
79                            "FOR ACTUAL AND FORMAL PARAMETERS");
80               END IF;
81               IF NOT STATUS THEN
82                    BEGIN
83                         P_IN_OUT := (DISC => IDENT_INT(7));
84                    EXCEPTION
85                         WHEN OTHERS =>
86                              FAILED ("EXCEPTION RAISED " &
87                                      "WHEN TRYING TO " &
88                                      "CHANGE UNCONSTRAINED " &
89                                      "DISCRIMINANT VALUE");
90                    END;
91               ELSE
92                    BEGIN
93                         P_IN_OUT := (DISC => IDENT_INT(7));
94                         FAILED ("DISCRIMINANT OF CONSTRAINED " &
95                                 "ACTUAL PARAMETER ILLEGALLY " &
96                                 "CHANGED BY ASSIGNMENT");
97                    EXCEPTION
98                         WHEN CONSTRAINT_ERROR => NULL;
99                         WHEN OTHERS => FAILED ("WRONG EXCEPTION");
100                    END;
101               END IF;
102          END PROC;
103
104     BEGIN
105
106          DECLARE
107               PROCEDURE PROC_C IS NEW PROC(KC,OBJC1,OBJC2,IDENT_BOOL(TRUE));
108               PROCEDURE PROC_U IS NEW PROC(KU,OBJU1,OBJU2,IDENT_BOOL(FALSE));
109          BEGIN
110               PROC_C;
111               PROC_U;
112               IF OBJU2.DISC /= 7 THEN
113               FAILED ("ASSIGNMENT TO UNCONSTRAINED ACTUAL " &
114                       "PARAMETER FAILED TO CHANGE DISCRIMINANT ");
115               END IF;
116          END;
117
118     END;
119     RESULT;
120END C37208B;
121