gcc/testsuite/ada/acats/tests/cd/cd4031a.ada

   1 -- CD4031A.ADA
   2
   3 --                             Grant of Unlimited Rights
   4 --
   5 --     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
   6 --     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
   7 --     unlimited rights in the software and documentation contained herein.
   8 --     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
   9 --     this public release, the Government intends to confer upon all
  10 --     recipients unlimited rights  equal to those held by the Government.
  11 --     These rights include rights to use, duplicate, release or disclose the
  12 --     released technical data and computer software in whole or in part, in
  13 --     any manner and for any purpose whatsoever, and to have or permit others
  14 --     to do so.
  15 --
  16 --                                    DISCLAIMER
  17 --
  18 --     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
  19 --     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
  20 --     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
  21 --     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
  22 --     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
  23 --     PARTICULAR PURPOSE OF SAID MATERIAL.
  24 --*
  25 -- OBJECTIVE:
  26 --     CHECK THAT WHEN A RECORD REPRESENTATION CLAUSE IS GIVEN FOR A
  27 --     VARIANT RECORD TYPE, THEN COMPONENTS BELONGING TO DIFFERENT
  28 --     VARIANTS CAN BE GIVEN OVERLAPPING STORAGE.
  29
  30 -- HISTORY:
  31 --     PWB 07/22/87  CREATED ORIGINAL TEST.
  32 --     DHH 03/27/89  CHANGED EXTENSION FROM '.DEP' TO '.ADA' AND
  33 --                   ADDED CHECK FOR REPRESENTATION CLAUSE.
  34 --     RJW 06/12/90  REMOVED REFERENCES TO LENGTH_CHECK.  REVISED
  35 --                   COMMENTS.
  36 --     JRL 10/13/96  Adjusted ranges in type definitions to allow 1's
  37 --                   complement machines to represent all values in
  38 --                   the specified number of bits.
  39
  40 WITH REPORT; USE REPORT;
  41 PROCEDURE CD4031A IS
  42
  43      TYPE DISCRIMINAN IS RANGE -1 .. 1;
  44      TYPE INT IS RANGE -3 .. 3;
  45      TYPE LARGE_INT IS RANGE -7 .. 7;
  46
  47      TYPE TEST_CLAUSE (DISC : DISCRIMINAN := 0) IS
  48           RECORD
  49                CASE DISC IS
  50                     WHEN 0 =>
  51                          INTEGER_COMP : LARGE_INT;
  52                     WHEN OTHERS  =>
  53                          CH_COMP_1 : INT;
  54                          CH_COMP_2 : INT;
  55                END CASE;
  56           END RECORD;
  57
  58      FOR TEST_CLAUSE USE
  59           RECORD
  60                DISC AT 0
  61                            RANGE 0 .. 1;
  62                INTEGER_COMP AT 0
  63                            RANGE 2 .. 5;
  64                CH_COMP_1 AT 0
  65                            RANGE 2 .. 4;
  66                CH_COMP_2 AT 0
  67                            RANGE 5 .. 7;
  68           END RECORD;
  69
  70      TYPE TEST_CL1 IS NEW TEST_CLAUSE(DISC => 0);
  71      TYPE TEST_CL2 IS NEW TEST_CLAUSE(DISC => 1);
  72      TEST_RECORD : TEST_CL1;
  73      TEST_RECORD1 : TEST_CL2;
  74
  75      INTEGER_COMP_FIRST,
  76      CH_COMP_1_FIRST : INTEGER;
  77
  78 BEGIN
  79      TEST ("CD4031A", "IN RECORD REPRESENTATION CLAUSES " &
  80                       "FOR VARIANT RECORD TYPES, " &
  81                       "COMPONENTS OF DIFFERENT VARIANTS " &
  82                       "CAN BE GIVEN OVERLAPPING STORAGE");
  83
  84      TEST_RECORD := (0, -7);
  85      INTEGER_COMP_FIRST := TEST_RECORD.INTEGER_COMP'FIRST_BIT;
  86
  87      TEST_RECORD1 := (1, -3, -3);
  88      CH_COMP_1_FIRST := TEST_RECORD1.CH_COMP_1'FIRST_BIT;
  89
  90      IF INTEGER_COMP_FIRST /= CH_COMP_1_FIRST THEN
  91           FAILED ("COMPONENTS DO NOT BEGIN AT SAME POINT");
  92      END IF;
  93
  94      RESULT;
  95 END CD4031A;