1-- C52009B.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-- CHECK THAT A RECORD VARIABLE DESIGNATED BY AN ACCESS VALUE CANNOT 26-- HAVE ITS DISCRIMINANT ALTERED, EVEN BY A COMPLETE RECORD 27-- ASSIGNMENT, AND EVEN THOUGH THE THE TARGET ACCESS VARIABLE IS NOT 28-- CONSTRAINED TO A SPECIFIC DISCRIMINANT VALUE. ATTEMPTING TO 29-- CHANGE THE TARGET'S DISCRIMINANT RAISES CONSTRAINT_ERROR AND LEAVES 30-- THE TARGET RECORD UNALTERED. THIS TEST USES NON-STATIC DISCRIMINANT 31-- VALUES AND A TYPE WITH DEFAULT DISCRIMINANTS. 32 33-- ASL 7/6/81 34-- SPS 10/26/82 35-- JBG 1/10/84 36 37WITH REPORT; 38PROCEDURE C52009B IS 39 40 USE REPORT; 41 42 TYPE REC(DISC : INTEGER := 5) IS 43 RECORD 44 COMP : INTEGER := 0; 45 END RECORD; 46 47 TYPE REC_NAME IS ACCESS REC; 48 49 HR : REC_NAME := NEW REC; 50 51BEGIN 52 53 TEST ("C52009B", "CANNOT CHANGE, THROUGH ASSIGNMENT, THE " & 54 "(DYNAMIC) DISCRIMINANT VALUE OF A RECORD DESIGNATED " & 55 "BY AN ACCESS VALUE"); 56 57 BEGIN 58 HR.ALL := (DISC => IDENT_INT(5), COMP => 3); 59 IF HR.ALL /= (IDENT_INT(5),3) THEN 60 FAILED ("LEGAL ASSIGNMENT FAILED"); 61 END IF; 62 EXCEPTION 63 WHEN CONSTRAINT_ERROR => 64 FAILED ("CONSTRAINT_ERROR RAISED WHEN DISCRIMINANT " & 65 "VALUE NOT CHANGED"); 66 END; 67 68 BEGIN 69 HR.ALL := (DISC => IDENT_INT(4), COMP => 2); 70 FAILED ("RECORD ASSIGNED VALUE WITH DIFFERENT DISCRIMINANT " & 71 "VALUE"); 72 EXCEPTION 73 WHEN CONSTRAINT_ERROR => 74 COMMENT ("DETECTED ATTEMPT TO CHANGE DISCRIMINANT " & 75 "VALUE"); 76 WHEN OTHERS => FAILED ("WRONG EXCEPTION"); 77 END; 78 79 RESULT; 80 81END C52009B; 82