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-- C74210A.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 OPERATOR SYMBOLS OVERLOADED IN A PACKAGE ARE
-- USED AND DERIVED IN PREFERENCE TO THOSE OF THE PARENT OF A DERIVED
-- PRIVATE TYPE.
-- CHECK THAT OPERATOR DEFINITIONS FOR A PRIVATE TYPE MAY BE
-- OVERLOADED OUTSIDE THE PACKAGE.
-- CHECK THAT EQUALITY CAN BE DEFINED FOR LIMITED TYPES AND COMPOSITE
-- TYPES WITH LIMITED COMPONENTS.
-- DAT 5/11/81
WITH REPORT; USE REPORT;
PROCEDURE C74210A IS
BEGIN
TEST ("C74210A", "OVERLOADED OPERATORS FOR PRIVATE TYPES");
DECLARE
PACKAGE P IS
TYPE T IS PRIVATE;
FUNCTION "+" (X, Y : T) RETURN T;
ONE, TWO : CONSTANT T;
TYPE L IS LIMITED PRIVATE;
TYPE A IS ARRAY (0 .. 0) OF L;
TYPE R IS RECORD
C : L;
END RECORD;
FUNCTION "=" (X, Y : L) RETURN BOOLEAN;
PRIVATE
TYPE T IS NEW INTEGER;
ONE : CONSTANT T := T(IDENT_INT(1));
TWO : CONSTANT T := T(IDENT_INT(2));
TYPE L IS (ENUM);
END P;
USE P;
VR : R;
VA : A;
PACKAGE BODY P IS
FUNCTION "+" (X, Y : T) RETURN T IS
BEGIN
RETURN 1;
END "+";
FUNCTION "=" (X, Y : L) RETURN BOOLEAN IS
BEGIN
RETURN IDENT_BOOL(FALSE);
END "=";
BEGIN
VR := (C => ENUM);
VA := (0 => VR.C);
END P;
BEGIN
IF ONE + TWO /= ONE THEN
FAILED ("WRONG ""+"" OPERATOR");
END IF;
DECLARE
TYPE NEW_T IS NEW T;
FUNCTION "=" (X, Y : A) RETURN BOOLEAN;
FUNCTION "=" (X, Y : R) RETURN BOOLEAN;
FUNCTION "+" (X, Y : T) RETURN T IS
BEGIN
RETURN TWO;
END "+";
FUNCTION "=" (X, Y : A) RETURN BOOLEAN IS
BEGIN
RETURN X(0) = Y(0);
END "=";
FUNCTION "=" (X, Y : R) RETURN BOOLEAN IS
BEGIN
RETURN X.C = Y.C;
END "=";
BEGIN
IF ONE + TWO /= TWO THEN
FAILED ("WRONG DERIVED ""+"" OPERATOR");
END IF;
IF VR = VR OR VA = VA THEN
FAILED ("CANNOT OVERLOAD ""="" CORRECTLY");
END IF;
END;
END;
RESULT;
END C74210A;
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