| -- C41304A.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: |
| -- CHECK THAT L.R RAISES CONSTRAINT_ERROR WHEN: |
| -- L DENOTES AN ACCESS OBJECT HAVING THE VALUE NULL. |
| -- L IS A FUNCTION CALL DELIVERING THE ACCESS VALUE NULL. |
| |
| -- HISTORY: |
| -- WKB 08/14/81 |
| -- JRK 08/17/81 |
| -- SPS 10/26/82 |
| -- TBN 03/26/86 PUT THE NON-EXISTENT COMPONENT CASES INTO C41304B. |
| -- JET 01/05/88 MODIFIED HEADER FORMAT AND ADDED CODE TO PREVENT |
| -- OPTIMIZATION. |
| |
| WITH REPORT; USE REPORT; |
| PROCEDURE C41304A IS |
| |
| TYPE R IS |
| RECORD |
| I : INTEGER; |
| END RECORD; |
| |
| TYPE T IS ACCESS R; |
| |
| BEGIN |
| TEST ("C41304A", "CONSTRAINT_ERROR WHEN L IN L.R DENOTES A NULL " & |
| "ACCESS OBJECT OR A FUNCTION CALL DELIVERING " & |
| "NULL"); |
| |
| -------------------------------------------------- |
| |
| DECLARE |
| |
| A : T := NEW R' (I => 1); |
| J : INTEGER; |
| |
| BEGIN |
| |
| IF EQUAL (4, 4) THEN |
| A := NULL; |
| END IF; |
| |
| J := A.I; |
| FAILED ("CONSTRAINT_ERROR NOT RAISED FOR A NULL ACCESS " & |
| "OBJECT"); |
| |
| IF EQUAL (J,J) THEN |
| COMMENT ("NO EXCEPTION RAISED"); |
| END IF; |
| |
| EXCEPTION |
| |
| WHEN CONSTRAINT_ERROR => |
| NULL; |
| WHEN OTHERS => |
| FAILED ("WRONG EXCEPTION RAISED FOR A NULL ACCESS " & |
| "OBJECT"); |
| |
| END; |
| |
| -------------------------------------------------- |
| |
| DECLARE |
| |
| J : INTEGER; |
| |
| FUNCTION F RETURN T IS |
| BEGIN |
| IF EQUAL (4, 4) THEN |
| RETURN NULL; |
| END IF; |
| RETURN NEW R' (I => 2); |
| END F; |
| |
| BEGIN |
| |
| J := F.I; |
| FAILED ("CONSTRAINT_ERROR NOT RAISED FOR A FUNCTION CALL " & |
| "DELIVERING A NULL ACCESS VALUE"); |
| |
| IF EQUAL (J,J) THEN |
| COMMENT ("NO EXCEPTION RAISED"); |
| END IF; |
| |
| EXCEPTION |
| |
| WHEN CONSTRAINT_ERROR => |
| NULL; |
| WHEN OTHERS => |
| FAILED ("WRONG EXCEPTION RAISED FOR A FUNCTION CALL " & |
| "DELIVERING A NULL ACCESS VALUE"); |
| |
| END; |
| |
| RESULT; |
| END C41304A; |