| -- 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; |