| -- CC3016F.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. |
| --* |
| -- OFFICE, 3E 114, THE PENTAGON, WASHINGTON DC 20301-3081. |
| |
| -- OBJECTIVE: |
| -- CHECK THAT AN INSTANTIATED PACKAGE HAS THE PROPERTIES REQUIRED |
| -- OF A PACKAGE. |
| |
| -- CHECK THAT IF THE PARENT TYPE IN A DERIVED TYPE DEFINITION IS |
| -- A GENERIC FORMAL TYPE, THE OPERATIONS DECLARED FOR THE DERIVED |
| -- TYPE IN THE TEMPLATE ARE DETERMINED BY THE DECLARATION OF THE |
| -- FORMAL TYPE. THE OPERATIONS DECLARED FOR DERIVED TYPE IN THE |
| -- INSTANCE ARE DETERMINED BY THE ACTUAL TYPE DENOTED BY THE FORMAL |
| -- PARAMETER. SEE AI-00398. |
| |
| -- HISTORY: |
| -- DAS 8 OCT 90 INITIAL VERSION. |
| -- JRL 02/19/93 ADDED USE CLAUSES FOR INSTANCES TO ENSURE DIRECT |
| -- OPERATOR VISIBILITY. CHANGED NT4'LAST TO P4.NT4'LAST |
| -- IN ASSIGNMENT STATEMENT FOR P4.X IN EXAMPLE_4. |
| -- CORRECTED ABE ERRORS IN EXAMPLE_2 AND EXAMPLE_3. |
| -- CHANGED R3."+" FROM MULTIPLICATION TO SUBTRACTION TO |
| -- AVOID CONSTRAINT_ERROR. |
| |
| WITH REPORT; |
| |
| PROCEDURE CC3016F IS |
| BEGIN |
| REPORT.TEST ("CC3016F", "CHECK THAT IF THE PARENT TYPE IN A " & |
| "DERIVED TYPE DEFINITION IS A GENERIC " & |
| "FORMAL TYPE, THE OPERATIONS DECLARED " & |
| "FOR THE DERIVED TYPE IN THE TEMPLATE " & |
| "ARE DETERMINED BY THE DECLARATION OF " & |
| "THE FORMAL TYPE, AND THAT THE " & |
| "OPERATIONS DECLARED FOR THE DERIVED " & |
| "TYPE IN THE INSTANCE ARE DETERMINED BY " & |
| "THE ACTUAL TYPE DENOTED BY THE FORMAL " & |
| "PARAMETER (AI-00398)"); |
| EXAMPLE_2: |
| DECLARE |
| GENERIC |
| TYPE PRIV IS PRIVATE; |
| PACKAGE GP2 IS |
| TYPE NT2 IS NEW PRIV; |
| END GP2; |
| |
| PACKAGE R2 IS |
| TYPE T2 IS RANGE 1..10; |
| FUNCTION F RETURN T2; |
| END R2; |
| |
| PACKAGE P2 IS NEW GP2 (PRIV => R2.T2); |
| USE P2; |
| |
| XX1 : P2.NT2; |
| XX2 : P2.NT2; |
| XX3 : P2.NT2; |
| |
| PACKAGE BODY R2 IS |
| FUNCTION F RETURN T2 IS |
| BEGIN |
| RETURN T2'LAST; |
| END F; |
| END R2; |
| BEGIN |
| XX1 := 5; -- IMPLICIT CONVERSION FROM |
| -- UNIVERSAL INTEGER TO P2.NT2 |
| -- IN P2. |
| XX2 := XX1 + XX1; -- PREDEFINED "+" DECLARED FOR |
| -- P2.NT2. |
| XX3 := P2.F; -- FUNCTION F DERIVED WITH THE |
| -- INSTANCE. |
| |
| END EXAMPLE_2; |
| |
| EXAMPLE_3: |
| DECLARE |
| GENERIC |
| TYPE T3 IS RANGE <>; |
| PACKAGE GP3 IS |
| TYPE NT3 IS NEW T3; |
| X : NT3 := 5; |
| Y : NT3 := X + 3; -- USES PREDEFINED "+" EVEN IN |
| -- INSTANCES |
| END GP3; |
| |
| PACKAGE R3 IS |
| TYPE S IS RANGE 1..10; |
| FUNCTION "+" (LEFT : IN S; RIGHT : IN S) RETURN S; |
| END R3; |
| |
| PACKAGE P3 IS NEW GP3 ( T3 => R3.S ); |
| USE P3; |
| |
| Z : P3.NT3; |
| |
| PACKAGE BODY R3 IS |
| FUNCTION "+" (LEFT : IN S; RIGHT : IN S) RETURN S IS |
| BEGIN -- IMPLEMENT AS SUBTRACTION, NOT ADDITION |
| RETURN LEFT - RIGHT; |
| END "+"; |
| END R3; |
| BEGIN |
| Z := P3.X + 3; -- USES REDEFINED "+" |
| |
| IF ( P3.Y /= P3.NT3'(8) ) THEN |
| REPORT.FAILED ("PREDEFINED ""+"" NOT USED TO COMPUTE " & |
| "P3.Y"); |
| END IF; |
| |
| IF (Z /= P3.NT3'(2) ) THEN |
| REPORT.FAILED ("REDEFINED ""+"" NOT USED TO COMPUTE Z"); |
| END IF; |
| END EXAMPLE_3; |
| |
| EXAMPLE_4: |
| DECLARE |
| GENERIC |
| TYPE T4 IS LIMITED PRIVATE; |
| PACKAGE GP4 IS |
| TYPE NT4 IS NEW T4; |
| X : NT4; |
| END GP4; |
| |
| PACKAGE P4 IS NEW GP4 (BOOLEAN); |
| USE P4; |
| |
| BEGIN |
| P4.X := P4.NT4'LAST; |
| IF ( P4.X OR (NOT P4.X) ) THEN |
| REPORT.COMMENT ("P4.X CORRECTLY HAS A BOOLEAN TYPE"); |
| END IF; |
| END EXAMPLE_4; |
| |
| EXAMPLE_5: |
| DECLARE |
| GENERIC |
| TYPE T5 (D : POSITIVE) IS PRIVATE; |
| PACKAGE GP5 IS |
| TYPE NT5 IS NEW T5; |
| X : NT5 (D => 5); |
| Y : POSITIVE := X.D; -- REFERS TO DISCRIMINANT OF NT5 |
| END GP5; |
| |
| TYPE REC (A : POSITIVE) IS |
| RECORD |
| D : POSITIVE := 7; |
| END RECORD; |
| PACKAGE P5 IS NEW GP5 (T5 => REC); |
| -- P5.Y INITIALIZED WITH VALUE USING COMPONENT SELECTION |
| -- OPERATION FOR THE DISCRIMINANT, I.E. FOR PARENT TYPE |
| -- T5 WHICH DENOTES REC. |
| |
| W1 : POSITIVE := P5.X.D; -- VALUE IS 7 |
| W2 : POSITIVE := P5.X.A; -- VALUE IS 5 |
| W3 : POSITIVE := P5.Y; -- VALUE IS 5; |
| BEGIN |
| IF ( ( W1 /= 7 ) OR ( W2 /= 5 ) OR (W3 /= 5 ) ) THEN |
| REPORT.FAILED ("INCORRECT COMPONENT SELECTION"); |
| END IF; |
| END EXAMPLE_5; |
| |
| REPORT.RESULT; |
| |
| END CC3016F; |
