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-- CD4031A.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.
--*
-- OBJECTIVE:
-- CHECK THAT WHEN A RECORD REPRESENTATION CLAUSE IS GIVEN FOR A
-- VARIANT RECORD TYPE, THEN COMPONENTS BELONGING TO DIFFERENT
-- VARIANTS CAN BE GIVEN OVERLAPPING STORAGE.
-- HISTORY:
-- PWB 07/22/87 CREATED ORIGINAL TEST.
-- DHH 03/27/89 CHANGED EXTENSION FROM '.DEP' TO '.ADA' AND
-- ADDED CHECK FOR REPRESENTATION CLAUSE.
-- RJW 06/12/90 REMOVED REFERENCES TO LENGTH_CHECK. REVISED
-- COMMENTS.
-- JRL 10/13/96 Adjusted ranges in type definitions to allow 1's
-- complement machines to represent all values in
-- the specified number of bits.
WITH REPORT; USE REPORT;
PROCEDURE CD4031A IS
TYPE DISCRIMINAN IS RANGE -1 .. 1;
TYPE INT IS RANGE -3 .. 3;
TYPE LARGE_INT IS RANGE -7 .. 7;
TYPE TEST_CLAUSE (DISC : DISCRIMINAN := 0) IS
RECORD
CASE DISC IS
WHEN 0 =>
INTEGER_COMP : LARGE_INT;
WHEN OTHERS =>
CH_COMP_1 : INT;
CH_COMP_2 : INT;
END CASE;
END RECORD;
FOR TEST_CLAUSE USE
RECORD
DISC AT 0
RANGE 0 .. 1;
INTEGER_COMP AT 0
RANGE 2 .. 5;
CH_COMP_1 AT 0
RANGE 2 .. 4;
CH_COMP_2 AT 0
RANGE 5 .. 7;
END RECORD;
TYPE TEST_CL1 IS NEW TEST_CLAUSE(DISC => 0);
TYPE TEST_CL2 IS NEW TEST_CLAUSE(DISC => 1);
TEST_RECORD : TEST_CL1;
TEST_RECORD1 : TEST_CL2;
INTEGER_COMP_FIRST,
CH_COMP_1_FIRST : INTEGER;
BEGIN
TEST ("CD4031A", "IN RECORD REPRESENTATION CLAUSES " &
"FOR VARIANT RECORD TYPES, " &
"COMPONENTS OF DIFFERENT VARIANTS " &
"CAN BE GIVEN OVERLAPPING STORAGE");
TEST_RECORD := (0, -7);
INTEGER_COMP_FIRST := TEST_RECORD.INTEGER_COMP'FIRST_BIT;
TEST_RECORD1 := (1, -3, -3);
CH_COMP_1_FIRST := TEST_RECORD1.CH_COMP_1'FIRST_BIT;
IF INTEGER_COMP_FIRST /= CH_COMP_1_FIRST THEN
FAILED ("COMPONENTS DO NOT BEGIN AT SAME POINT");
END IF;
RESULT;
END CD4031A;
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