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1 12 jlechner
-- CD4031A.ADA
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained 
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making 
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--     this public release, the Government intends to confer upon all 
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--     recipients unlimited rights  equal to those held by the Government.  
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--     These rights include rights to use, duplicate, release or disclose the 
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--     released technical data and computer software in whole or in part, in 
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--     any manner and for any purpose whatsoever, and to have or permit others 
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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-- OBJECTIVE:
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--     CHECK THAT WHEN A RECORD REPRESENTATION CLAUSE IS GIVEN FOR A
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--     VARIANT RECORD TYPE, THEN COMPONENTS BELONGING TO DIFFERENT
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--     VARIANTS CAN BE GIVEN OVERLAPPING STORAGE.
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-- HISTORY:
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--     PWB 07/22/87  CREATED ORIGINAL TEST.
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--     DHH 03/27/89  CHANGED EXTENSION FROM '.DEP' TO '.ADA' AND
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--                   ADDED CHECK FOR REPRESENTATION CLAUSE.
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--     RJW 06/12/90  REMOVED REFERENCES TO LENGTH_CHECK.  REVISED
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--                   COMMENTS.
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--     JRL 10/13/96  Adjusted ranges in type definitions to allow 1's
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--                   complement machines to represent all values in
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--                   the specified number of bits.
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WITH REPORT; USE REPORT;
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PROCEDURE CD4031A IS
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     TYPE DISCRIMINAN IS RANGE -1 .. 1;
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     TYPE INT IS RANGE -3 .. 3;
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     TYPE LARGE_INT IS RANGE -7 .. 7;
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     TYPE TEST_CLAUSE (DISC : DISCRIMINAN := 0) IS
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          RECORD
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               CASE DISC IS
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                    WHEN 0 =>
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                         INTEGER_COMP : LARGE_INT;
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                    WHEN OTHERS  =>
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                         CH_COMP_1 : INT;
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                         CH_COMP_2 : INT;
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               END CASE;
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          END RECORD;
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     FOR TEST_CLAUSE USE
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          RECORD
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               DISC AT 0
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                           RANGE 0 .. 1;
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               INTEGER_COMP AT 0
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                           RANGE 2 .. 5;
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               CH_COMP_1 AT 0
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                           RANGE 2 .. 4;
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               CH_COMP_2 AT 0
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                           RANGE 5 .. 7;
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          END RECORD;
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     TYPE TEST_CL1 IS NEW TEST_CLAUSE(DISC => 0);
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     TYPE TEST_CL2 IS NEW TEST_CLAUSE(DISC => 1);
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     TEST_RECORD : TEST_CL1;
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     TEST_RECORD1 : TEST_CL2;
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     INTEGER_COMP_FIRST,
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     CH_COMP_1_FIRST : INTEGER;
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BEGIN
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     TEST ("CD4031A", "IN RECORD REPRESENTATION CLAUSES " &
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                      "FOR VARIANT RECORD TYPES, " &
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                      "COMPONENTS OF DIFFERENT VARIANTS " &
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                      "CAN BE GIVEN OVERLAPPING STORAGE");
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     TEST_RECORD := (0, -7);
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     INTEGER_COMP_FIRST := TEST_RECORD.INTEGER_COMP'FIRST_BIT;
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     TEST_RECORD1 := (1, -3, -3);
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     CH_COMP_1_FIRST := TEST_RECORD1.CH_COMP_1'FIRST_BIT;
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     IF INTEGER_COMP_FIRST /= CH_COMP_1_FIRST THEN
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          FAILED ("COMPONENTS DO NOT BEGIN AT SAME POINT");
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     END IF;
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     RESULT;
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END CD4031A;

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