| -- C52009B.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. |
| --* |
| -- CHECK THAT A RECORD VARIABLE DESIGNATED BY AN ACCESS VALUE CANNOT |
| -- HAVE ITS DISCRIMINANT ALTERED, EVEN BY A COMPLETE RECORD |
| -- ASSIGNMENT, AND EVEN THOUGH THE THE TARGET ACCESS VARIABLE IS NOT |
| -- CONSTRAINED TO A SPECIFIC DISCRIMINANT VALUE. ATTEMPTING TO |
| -- CHANGE THE TARGET'S DISCRIMINANT RAISES CONSTRAINT_ERROR AND LEAVES |
| -- THE TARGET RECORD UNALTERED. THIS TEST USES NON-STATIC DISCRIMINANT |
| -- VALUES AND A TYPE WITH DEFAULT DISCRIMINANTS. |
| |
| -- ASL 7/6/81 |
| -- SPS 10/26/82 |
| -- JBG 1/10/84 |
| |
| WITH REPORT; |
| PROCEDURE C52009B IS |
| |
| USE REPORT; |
| |
| TYPE REC(DISC : INTEGER := 5) IS |
| RECORD |
| COMP : INTEGER := 0; |
| END RECORD; |
| |
| TYPE REC_NAME IS ACCESS REC; |
| |
| HR : REC_NAME := NEW REC; |
| |
| BEGIN |
| |
| TEST ("C52009B", "CANNOT CHANGE, THROUGH ASSIGNMENT, THE " & |
| "(DYNAMIC) DISCRIMINANT VALUE OF A RECORD DESIGNATED " & |
| "BY AN ACCESS VALUE"); |
| |
| BEGIN |
| HR.ALL := (DISC => IDENT_INT(5), COMP => 3); |
| IF HR.ALL /= (IDENT_INT(5),3) THEN |
| FAILED ("LEGAL ASSIGNMENT FAILED"); |
| END IF; |
| EXCEPTION |
| WHEN CONSTRAINT_ERROR => |
| FAILED ("CONSTRAINT_ERROR RAISED WHEN DISCRIMINANT " & |
| "VALUE NOT CHANGED"); |
| END; |
| |
| BEGIN |
| HR.ALL := (DISC => IDENT_INT(4), COMP => 2); |
| FAILED ("RECORD ASSIGNED VALUE WITH DIFFERENT DISCRIMINANT " & |
| "VALUE"); |
| EXCEPTION |
| WHEN CONSTRAINT_ERROR => |
| COMMENT ("DETECTED ATTEMPT TO CHANGE DISCRIMINANT " & |
| "VALUE"); |
| WHEN OTHERS => FAILED ("WRONG EXCEPTION"); |
| END; |
| |
| RESULT; |
| |
| END C52009B; |