gcc/testsuite/ada/acats/tests/c5/c52009b.ada

   1 -- C52009B.ADA
   2
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   8 --     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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  12 --     released technical data and computer software in whole or in part, in
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  16 --                                    DISCLAIMER
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  18 --     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
  19 --     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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  22 --     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
  23 --     PARTICULAR PURPOSE OF SAID MATERIAL.
  24 --*
  25 -- CHECK THAT A RECORD VARIABLE DESIGNATED BY AN ACCESS VALUE CANNOT
  26 -- HAVE ITS DISCRIMINANT ALTERED, EVEN BY A COMPLETE RECORD
  27 -- ASSIGNMENT, AND EVEN THOUGH THE THE TARGET ACCESS VARIABLE IS NOT
  28 -- CONSTRAINED TO A SPECIFIC DISCRIMINANT VALUE.  ATTEMPTING TO
  29 -- CHANGE THE TARGET'S DISCRIMINANT RAISES CONSTRAINT_ERROR AND LEAVES
  30 -- THE TARGET RECORD UNALTERED.  THIS TEST USES NON-STATIC DISCRIMINANT
  31 -- VALUES AND A TYPE WITH DEFAULT DISCRIMINANTS.
  32
  33 -- ASL 7/6/81
  34 -- SPS 10/26/82
  35 -- JBG 1/10/84
  36
  37 WITH REPORT;
  38 PROCEDURE C52009B IS
  39
  40      USE REPORT;
  41
  42      TYPE REC(DISC : INTEGER := 5) IS
  43           RECORD
  44                COMP : INTEGER := 0;
  45           END RECORD;
  46
  47      TYPE REC_NAME IS ACCESS REC;
  48
  49      HR : REC_NAME := NEW REC;
  50
  51 BEGIN
  52
  53      TEST ("C52009B", "CANNOT CHANGE, THROUGH ASSIGNMENT, THE " &
  54            "(DYNAMIC) DISCRIMINANT VALUE OF A RECORD DESIGNATED " &
  55            "BY AN ACCESS VALUE");
  56
  57      BEGIN
  58           HR.ALL := (DISC => IDENT_INT(5), COMP => 3);
  59           IF HR.ALL /= (IDENT_INT(5),3) THEN
  60                FAILED ("LEGAL ASSIGNMENT FAILED");
  61           END IF;
  62      EXCEPTION
  63           WHEN CONSTRAINT_ERROR =>
  64                FAILED ("CONSTRAINT_ERROR RAISED WHEN DISCRIMINANT " &
  65                        "VALUE NOT CHANGED");
  66      END;
  67
  68      BEGIN
  69           HR.ALL := (DISC => IDENT_INT(4), COMP => 2);
  70           FAILED ("RECORD ASSIGNED VALUE WITH DIFFERENT DISCRIMINANT " &
  71                   "VALUE");
  72      EXCEPTION
  73           WHEN CONSTRAINT_ERROR =>
  74                COMMENT ("DETECTED ATTEMPT TO CHANGE DISCRIMINANT " &
  75                         "VALUE");
  76           WHEN OTHERS => FAILED ("WRONG EXCEPTION");
  77      END;
  78
  79      RESULT;
  80
  81 END C52009B;