| -- C37208B.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. |
| --* |
| -- FOR A TYPE WITH DEFAULT DISCRIMINANT VALUES, CHECK THAT A |
| -- DISCRIMINANT CONSTRAINT CAN BE OMITTED IN A GENERIC FORMAL |
| -- PARAMETER, AND HENCE, FOR BOTH IN AND IN OUT PARAMETERS, THE |
| -- 'CONSTRAINED ATTRIBUTE OF THE ACTUAL PARAMETER BECOMES THE |
| -- 'CONSTRAINED ATTRIBUTE OF THE FORMAL PARAMETER, AND, FOR IN |
| -- OUT PARAMETERS, IF THE 'CONSTRAINED ATTRIBUTE IS FALSE, |
| -- ASSIGNMENTS TO THE FORMAL PARAMETERS CAN CHANGE THE |
| -- DISCRIMINANTS OF THE ACTUAL PARAMETER; IF THE 'CONSTRAINED |
| -- ATTRIBUTE IS TRUE, ASSIGNMENTS THAT ATTEMPT TO CHANGE THE |
| -- DISCRIMINANTS OF THE ACTUAL PARAMETER RAISE CONSTRAINT_ERROR. |
| |
| -- ASL 7/29/81 |
| -- VKG 1/20/83 |
| -- EDS 7/16/98 AVOID OPTIMIZATION |
| |
| WITH REPORT; |
| PROCEDURE C37208B IS |
| |
| USE REPORT; |
| |
| BEGIN |
| TEST ("C37208B","FOR TYPES WITH DEFAULT DISCRIMINANT " & |
| "VALUES, DISCRIMINANT CONSTRAINTS CAN BE OMITTED " & |
| "IN GENERIC FORMAL PARAMETERS, AND THE " & |
| "'CONSTRAINED ATTRIBUTE HAS CORRECT VALUES " & |
| "DEPENDING ON THE ACTUAL PARAMETERS"); |
| |
| DECLARE |
| TYPE REC(DISC : INTEGER := 7) IS |
| RECORD |
| NULL; |
| END RECORD; |
| |
| KC : CONSTANT REC(3) := (DISC => 3); |
| KU : CONSTANT REC := (DISC => 3); |
| OBJC1,OBJC2 : REC(3) := (DISC => 3); |
| OBJU1,OBJU2 : REC := (DISC => 3); |
| |
| GENERIC |
| P_IN1 : REC; |
| P_IN2 : REC; |
| P_IN_OUT : IN OUT REC; |
| STATUS : BOOLEAN; |
| PROCEDURE PROC; |
| |
| PROCEDURE PROC IS |
| BEGIN |
| |
| IF P_IN1'CONSTRAINED /= TRUE OR |
| P_IN2'CONSTRAINED /= TRUE OR |
| P_IN_OUT'CONSTRAINED /= STATUS |
| THEN |
| |
| FAILED ("'CONSTRAINED ATTRIBUTES DO NOT MATCH " & |
| "FOR ACTUAL AND FORMAL PARAMETERS"); |
| END IF; |
| IF NOT STATUS THEN |
| BEGIN |
| P_IN_OUT := (DISC => IDENT_INT(7)); |
| EXCEPTION |
| WHEN OTHERS => |
| FAILED ("EXCEPTION RAISED " & |
| "WHEN TRYING TO " & |
| "CHANGE UNCONSTRAINED " & |
| "DISCRIMINANT VALUE"); |
| END; |
| ELSE |
| BEGIN |
| P_IN_OUT := (DISC => IDENT_INT(7)); |
| FAILED ("DISCRIMINANT OF CONSTRAINED " & |
| "ACTUAL PARAMETER ILLEGALLY " & |
| "CHANGED BY ASSIGNMENT"); |
| EXCEPTION |
| WHEN CONSTRAINT_ERROR => NULL; |
| WHEN OTHERS => FAILED ("WRONG EXCEPTION"); |
| END; |
| END IF; |
| END PROC; |
| |
| BEGIN |
| |
| DECLARE |
| PROCEDURE PROC_C IS NEW PROC(KC,OBJC1,OBJC2,IDENT_BOOL(TRUE)); |
| PROCEDURE PROC_U IS NEW PROC(KU,OBJU1,OBJU2,IDENT_BOOL(FALSE)); |
| BEGIN |
| PROC_C; |
| PROC_U; |
| IF OBJU2.DISC /= 7 THEN |
| FAILED ("ASSIGNMENT TO UNCONSTRAINED ACTUAL " & |
| "PARAMETER FAILED TO CHANGE DISCRIMINANT "); |
| END IF; |
| END; |
| |
| END; |
| RESULT; |
| END C37208B; |