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-- 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;