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+-- C74211A.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 WITHIN THE PACKAGE SPECIFICATION AND BODY, ANY EXPLICIT
+-- DECLARATIONS OF OPERATORS AND SUBPROGRAMS HIDE ANY OPERATIONS WHICH
+-- ARE IMPLICITLY DECLARED AT THE POINT OF THE FULL DECLARATION,
+-- REGARDLESS OF THE ORDER OF OCCURENCE OF THE DECLARATIONS.
+
+-- CHECK THAT IMPLICITLY DECLARED DERIVED SUBPROGRAMS HIDE IMPLICITLY
+-- DECLARED PREDEFINED OPERATORS, REGARDLESS OF THE ORDER OF OCCURENCE
+-- OF THE DECLARATIONS.
+
+-- DSJ 4/28/83
+-- JBG 9/23/83
+
+-- A) EXPLICIT DECLARATION HIDES LATER IMPLICIT DECL OF PREDEFINED OP.
+-- B) " " " LATER " " " DERIVED OP.
+-- C) " " " EARLIER " " " PREDEFINED OP.
+-- D) " " " EARLIER " " " DERIVED OP.
+
+WITH REPORT;
+PROCEDURE C74211A IS
+
+ USE REPORT;
+
+BEGIN
+
+ TEST ("C74211A", "CHECK THAT HIDING OF IMPLICITLY DECLARED " &
+ "OPERATORS AND DERIVED SUBPROGRAMS IS DONE " &
+ "CORRECTLY REGARDLESS OF ORDER OF DECL'S");
+
+ DECLARE
+
+ PACKAGE P1 IS
+ TYPE T1 IS RANGE 1 .. 50;
+ C1 : CONSTANT T1 := T1(IDENT_INT(2));
+ D1 : CONSTANT T1 := C1 + C1; -- PREDEFINED "+"
+ FUNCTION "+" (L, R : T1) RETURN T1; -- C) FOR "+".
+ FUNCTION "-" (L, R : T1) RETURN T1; -- C) FOR "-".
+ FUNCTION "/" (L, R : T1) RETURN T1;
+ END P1;
+
+ USE P1;
+
+ PACKAGE BODY P1 IS
+ A,B : T1 := 3;
+
+ FUNCTION "+" (L, R : T1) RETURN T1 IS
+ BEGIN
+ IF L = R THEN
+ RETURN 1;
+ ELSE RETURN 2;
+ END IF;
+ END "+";
+
+ FUNCTION "-" (L, R : T1) RETURN T1 IS
+ BEGIN
+ IF L = R THEN
+ RETURN 3;
+ ELSE RETURN 4;
+ END IF;
+ END "-";
+
+ FUNCTION "/" (L, R : T1) RETURN T1 IS
+ BEGIN
+ IF L = R THEN
+ RETURN T1(IDENT_INT(INTEGER(L)));
+ ELSE
+ RETURN T1(IDENT_INT(50));
+ END IF;
+ END "/";
+
+ BEGIN
+ IF D1 /= 4 THEN
+ FAILED ("WRONG PREDEFINED OPERATION - '+' ");
+ END IF;
+
+ IF D1 + C1 /= 2 THEN
+ FAILED ("IMPLICIT '+' NOT HIDDEN BY EXPLICIT '+'");
+ END IF;
+
+ IF A + B /= 1 THEN
+ FAILED ("IMPLICIT DECLARATION NOT HIDDEN " &
+ "BY EXPLICIT DECLARATION - '+' ");
+ END IF;
+
+ IF A - B /= 3 THEN
+ FAILED ("IMPLICIT DECLARATION NOT HIDDEN " &
+ "BY EXPLICIT DECLARATION - '-' ");
+ END IF;
+
+ IF A * B /= 9 THEN
+ FAILED ("WRONG PREDEFINED OPERATION - '*' ");
+ END IF;
+
+ IF B / A /= T1(IDENT_INT(3)) THEN
+ FAILED ("NOT REDEFINED '/' ");
+ END IF;
+ END P1;
+
+ PACKAGE P2 IS
+ TYPE T2 IS PRIVATE;
+ X , Y : CONSTANT T2;
+ FUNCTION "+" (L, R : T2) RETURN T2; -- B)
+ FUNCTION "*" (L, R : T2) RETURN T2; -- A)
+ PRIVATE
+ TYPE T2 IS NEW T1; -- B) +; A) *
+ Z : T2 := T2(IDENT_INT(3))/4; -- Z = 50 USING
+ -- DERIVED /
+ FUNCTION "/" (L, R : T2) RETURN T2; -- D) FOR /
+ X , Y : CONSTANT T2 := 3;
+ END P2;
+
+ PACKAGE BODY P2 IS
+ FUNCTION "+" (L, R : T2) RETURN T2 IS
+ BEGIN
+ IF L = R THEN
+ RETURN T2(IDENT_INT(5));
+ ELSE RETURN T2(IDENT_INT(6));
+ END IF;
+ END "+";
+
+ FUNCTION "*" (L, R : T2) RETURN T2 IS
+ BEGIN
+ IF L = R THEN
+ RETURN T2(IDENT_INT(7));
+ ELSE RETURN T2(IDENT_INT(8));
+ END IF;
+ END "*";
+
+ FUNCTION "/" (L, R : T2) RETURN T2 IS
+ BEGIN
+ IF L = R THEN
+ RETURN T2(IDENT_INT(9));
+ ELSE RETURN T2(IDENT_INT(10));
+ END IF;
+ END "/";
+ BEGIN
+ IF X + Y /= 5 THEN
+ FAILED ("DERIVED SUBPROGRAM NOT HIDDEN BY " &
+ "EXPLICIT DECLARATION - '+' ");
+ END IF;
+
+ IF Y - X /= 3 THEN
+ FAILED ("PREDEFINED OPERATOR NOT HIDDEN BY " &
+ "DERIVED SUBPROGRAM - '-' ");
+ END IF;
+
+ IF X * Y /= 7 THEN
+ FAILED ("PREDEFINED OPERATOR NOT HIDDEN BY " &
+ "EXPLICIT DECLARATION - '*' ");
+ END IF;
+
+ IF Y / X /= T2(IDENT_INT(9)) THEN
+ FAILED ("DERIVED OPERATOR NOT HIDDEN BY " &
+ "EXPLICIT DECLARATION - '/' ");
+ END IF;
+
+ IF Z /= 50 THEN
+ FAILED ("DERIVED OPERATOR HIDDEN PREMATURELY " &
+ " BY REDECLARED OPERATOR");
+ END IF;
+
+ END P2;
+
+ BEGIN
+
+ NULL;
+
+ END;
+
+ RESULT;
+
+END C74211A;