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-- C52009A.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 STATIC DISCRIMINANT 

-- VALUES.

-- ASL 6/25/81

-- SPS 10/26/82

WITH REPORT;

PROCEDURE C52009A IS

     USE REPORT;

     TYPE REC (DISC : INTEGER) IS

          RECORD

               COMP : INTEGER;

          END RECORD;

     TYPE REC_NAME IS ACCESS REC;

     HR : REC_NAME := NEW REC'(5,0);

BEGIN

     TEST ("C52009A", "CANNOT CHANGE, THROUGH ASSIGNMENT, THE " &

           "(STATIC) DISCRIMINANT VALUE OF A RECORD DESIGNATED " &

           "BY AN ACCESS VALUE");

     BEGIN

          HR.ALL := (DISC => 5, COMP => 3);

          IF HR.ALL /= (5,3) THEN

               FAILED ("LEGAL ASSIGNMENT FAILED");

          END IF;

          HR.ALL := (DISC => 4, COMP => 2);

          FAILED ("RECORD ASSIGNED VALUE WITH DIFFERENT DISCRIMINANT " &

                  "VALUE");

     EXCEPTION

          WHEN CONSTRAINT_ERROR =>

               IF HR.ALL /= (5,3) THEN

                    FAILED ("TARGET RECORD VALUE ALTERED BY " &

                            "ASSIGNMENT WITH A DIFFERENT " &

                            "DISCRIMINANT VALUE EVEN AFTER " &

                            "CONSTRAINT_ERROR RAISED");

               END IF;

          WHEN OTHERS => FAILED ("WRONG EXCEPTION");

     END;

     RESULT;

END C52009A;