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1 149 jeremybenn
-- C74210A.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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-- CHECK THAT OPERATOR SYMBOLS OVERLOADED IN A PACKAGE ARE
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--   USED AND DERIVED IN PREFERENCE TO THOSE OF THE PARENT OF A DERIVED
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--   PRIVATE TYPE. 
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-- CHECK THAT OPERATOR DEFINITIONS FOR A PRIVATE TYPE MAY BE
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--   OVERLOADED OUTSIDE THE PACKAGE.
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-- CHECK THAT EQUALITY CAN BE DEFINED FOR LIMITED TYPES AND COMPOSITE
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--   TYPES WITH LIMITED COMPONENTS. 
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-- DAT 5/11/81
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WITH REPORT; USE REPORT;
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PROCEDURE C74210A IS
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BEGIN
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     TEST ("C74210A", "OVERLOADED OPERATORS FOR PRIVATE TYPES");
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     DECLARE
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          PACKAGE P IS
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               TYPE T IS PRIVATE;
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               FUNCTION "+" (X, Y : T) RETURN T;
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               ONE, TWO : CONSTANT T;
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               TYPE L IS LIMITED PRIVATE;
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               TYPE A IS ARRAY (0 .. 0) OF L;
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               TYPE R IS RECORD
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                    C : L;
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               END RECORD;
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               FUNCTION "=" (X, Y : L) RETURN BOOLEAN;
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          PRIVATE
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               TYPE T IS NEW INTEGER;
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               ONE : CONSTANT T := T(IDENT_INT(1));
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               TWO : CONSTANT T := T(IDENT_INT(2));
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               TYPE L IS (ENUM);
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          END P;
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          USE P;
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          VR : R;
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          VA : A;
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          PACKAGE BODY P IS
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               FUNCTION "+" (X, Y : T) RETURN T IS
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               BEGIN
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                    RETURN 1;
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               END "+";
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               FUNCTION "=" (X, Y : L) RETURN BOOLEAN IS
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               BEGIN
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                    RETURN IDENT_BOOL(FALSE);
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               END "=";
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          BEGIN
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               VR := (C => ENUM);
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               VA := (0 => VR.C);
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          END P;
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     BEGIN
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          IF ONE + TWO /= ONE THEN
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               FAILED ("WRONG ""+"" OPERATOR");
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          END IF;
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          DECLARE
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               TYPE NEW_T IS NEW T;
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               FUNCTION "=" (X, Y : A) RETURN BOOLEAN;
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               FUNCTION "=" (X, Y : R) RETURN BOOLEAN;
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               FUNCTION "+" (X, Y : T) RETURN T IS
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               BEGIN
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                    RETURN TWO;
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               END "+";
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               FUNCTION "=" (X, Y : A) RETURN BOOLEAN IS
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               BEGIN
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                    RETURN X(0) = Y(0);
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               END "=";
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               FUNCTION "=" (X, Y : R) RETURN BOOLEAN IS
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               BEGIN
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                    RETURN X.C = Y.C;
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               END "=";
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          BEGIN
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               IF ONE + TWO /= TWO THEN
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                    FAILED ("WRONG DERIVED ""+"" OPERATOR");
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               END IF;
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               IF VR = VR OR VA = VA THEN
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                    FAILED ("CANNOT OVERLOAD ""="" CORRECTLY");
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               END IF;
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          END;
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     END;
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     RESULT;
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END C74210A;

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