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-- C392D02.A
--
-- 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.
--*
--
-- OBJECTIVE:
-- Check that a primitive procedure declared in a private part is not
-- overridden by a procedure explicitly declared at a place where the
-- primitive procedure in question is not visible.
--
-- Check for the case where the non-overriding operation is declared in a
-- separate (non-child) package from that declaring the parent type, and
-- the descendant type is a record extension.
--
-- TEST DESCRIPTION:
-- Consider:
--
-- package P is
-- type Root is tagged ...
-- private
-- procedure Pri_Op (A: Root);
-- end P;
--
-- with P;
-- package Q is
-- type Derived is new P.Root with record...
-- procedure Pri_Op (A: Derived); -- Does NOT override parent's Op.
-- ...
-- end Q;
--
-- Type Derived inherits Pri_Op from the parent type Root. However,
-- because P.Pri_Op is never visible within the immediate scope of
-- Derived, it is not implicitly declared for Derived. As a result,
-- the explicit Q.Pri_Op does not override P.Pri_Op and is totally
-- unrelated to it.
--
-- Dispatching calls to P.Pri_Op with operands of tag Derived will
-- not dispatch to Q.Pri_Op; the body executed will be that of P.Pri_Op.
--
-- TEST FILES:
-- The following files comprise this test:
--
-- F392D00.A
-- C392D02.A
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
with F392D00;
package C392D02_0 is
type Aperture is (Eight, Sixteen);
type Auto_Speed is new F392D00.Remote_Camera with record
-- ...
FStop : Aperture;
end record;
procedure Set_Shutter_Speed (C : in out Auto_Speed;
Speed : in F392D00.Shutter_Speed);
-- Does NOT override.
-- This version of Set_Shutter_Speed does NOT override the operation
-- inherited from the parent, because the inherited operation is never
-- visible (and thus, is never implicitly declared) within the immediate
-- scope of type Auto_Speed.
procedure Self_Test (C : in out Auto_Speed'Class);
-- ...Other operations.
end C392D02_0;
--==================================================================--
package body C392D02_0 is
procedure Set_Shutter_Speed (C : in out Auto_Speed;
Speed : in F392D00.Shutter_Speed) is
begin
-- Artificial for testing purposes.
C.Shutter := F392D00.Four_Hundred;
end Set_Shutter_Speed;
----------------------------------------------------
procedure Self_Test (C : in out Auto_Speed'Class) is
begin
-- Should dispatch to the Set_Shutter_Speed explicitly declared
-- for Auto_Speed.
Set_Shutter_Speed (C, F392D00.Two_Fifty);
end Self_Test;
end C392D02_0;
--==================================================================--
with F392D00;
with C392D02_0;
with Report;
procedure C392D02 is
Basic_Camera : F392D00.Remote_Camera;
Auto_Camera1 : C392D02_0.Auto_Speed;
Auto_Camera2 : C392D02_0.Auto_Speed;
TC_Expected_Basic_Speed : constant F392D00.Shutter_Speed
:= F392D00.Thousand;
TC_Expected_Speed : constant F392D00.Shutter_Speed
:= F392D00.Four_Hundred;
use type F392D00.Shutter_Speed;
begin
Report.Test ("C392D02", "Dispatching for non-overridden primitive " &
"subprograms: record extension declared in non-child " &
"package, parent is tagged record");
-- Call the class-wide operation for Remote_Camera'Class, which dispatches
-- to Set_Shutter_Speed:
-- For an object of type Remote_Camera, the dispatching call should
-- dispatch to the body declared for the root type:
F392D00.Self_Test(Basic_Camera);
if Basic_Camera.Shutter /= TC_Expected_Basic_Speed then
Report.Failed ("Call dispatched incorrectly for root type");
end if;
-- C392D02_0.Set_Shutter_Speed should never be called by F392D00.Self_Test,
-- since C392D02_0.Set_Shutter_Speed does not override
-- F392D00.Set_Shutter_Speed.
-- For an object of type Auto_Speed, the dispatching call should
-- also dispatch to the body declared for the root type:
F392D00.Self_Test(Auto_Camera1);
if Auto_Camera1.Shutter /= TC_Expected_Basic_Speed then
Report.Failed ("Call dispatched incorrectly for derived type");
end if;
-- Call to Self_Test from C392D02_0 invokes the dispatching call to
-- Set_Shutter_Speed which should dispatch to the body explicitly declared
-- for Auto_Speed:
C392D02_0.Self_Test(Auto_Camera2);
if Auto_Camera2.Shutter /= TC_Expected_Speed then
Report.Failed ("Call to explicit subprogram executed the wrong body");
end if;
Report.Result;
end C392D02;
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