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-- CC54002.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 general access-to-variable type may be passed as an
-- actual to a generic formal general access-to-variable type. Check that
-- designated objects may be read and updated through the access value.
--
-- TEST DESCRIPTION:
-- The generic implements a List of access objects as an array, which
-- is itself a component of a record. The designated type of the formal
-- access type is a formal private type declared in the same generic
-- formal part.
--
-- The access objects to be placed in the List are created both
-- statically and dynamically, utilizing allocators and the 'Access
-- attribute.
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
-- 10 Apr 96 SAIC ACVC 2.1: Added pragma Elaborate to context clause
-- preceding CC54002_1.
--
--!
generic
Size : in Positive;
type Element_Type (<>) is private;
type Element_Ptr is access all Element_Type;
package CC54002_0 is -- Generic list of pointers.
subtype Index is Positive range 1 .. (Size + 1);
type List_Array is array (Index) of Element_Ptr;
type List_Type is record
Elements : List_Array;
Next : Index := 1; -- Next available "slot" in list.
end record;
procedure Put (List : in out List_Type;
Elem_Ptr : in Element_Ptr;
Location : in Index);
procedure Get (List : in out List_Type;
Elem_Ptr : out Element_Ptr;
Location : in Index);
-- ... Other operations.
end CC54002_0;
--===================================================================--
package body CC54002_0 is
procedure Put (List : in out List_Type;
Elem_Ptr : in Element_Ptr;
Location : in Index) is
begin
List.Elements(Location) := Elem_Ptr;
end Put;
procedure Get (List : in out List_Type;
Elem_Ptr : out Element_Ptr;
Location : in Index) is
begin -- Artificial: no provision for getting "empty" element.
Elem_Ptr := List.Elements(Location);
end Get;
end CC54002_0;
--===================================================================--
with CC54002_0; -- Generic List of pointers.
pragma Elaborate (CC54002_0);
package CC54002_1 is
subtype Lengths is Natural range 0 .. 50;
type Subscriber (NLen, ALen: Lengths := 50) is record
Name : String(1 .. NLen);
Address : String(1 .. ALen);
-- ... Other components.
end record;
type Subscriber_Ptr is access all Subscriber; -- General access-to-
-- variable type.
package District_Subscription_Lists is new CC54002_0
(Element_Type => Subscriber,
Element_Ptr => Subscriber_Ptr,
Size => 100);
District_01_Subscribers : District_Subscription_Lists.List_Type;
New_Subscriber_01 : aliased CC54002_1.Subscriber :=
(12, 23, "Brown, Silas", "King's Pyland, Dartmoor");
New_Subscriber_02 : aliased CC54002_1.Subscriber :=
(16, 23, "Hatherly, Victor", "16A Victoria St. London");
end CC54002_1;
-- No body for CC54002_1.
--===================================================================--
with CC54002_1;
with Report;
procedure CC54002 is
Mod_Subscriber_01 : constant CC54002_1.Subscriber :=
(12, 23, "Brown, Silas", "Mapleton, Dartmoor ");
TC_Actual_01, TC_Actual_02 : CC54002_1.Subscriber_Ptr;
use type CC54002_1.Subscriber; -- "/=" directly visible.
begin
Report.Test ("CC54002", "Check that a general access-to-variable type " &
"may be passed as an actual to a generic formal " &
"access-to-variable type");
-- Add elements to the list:
CC54002_1.District_Subscription_Lists.Put -- Element created statically.
(List => CC54002_1.District_01_Subscribers,
Elem_Ptr => CC54002_1.New_Subscriber_01'Access,
Location => 1);
CC54002_1.District_Subscription_Lists.Put -- Element created dynamically.
(List => CC54002_1.District_01_Subscribers,
Elem_Ptr => new CC54002_1.Subscriber'(CC54002_1.New_Subscriber_02),
Location => 2);
-- Manipulation of the objects on the list is performed below directly
-- through the access objects. Although such manipulation is artificial
-- from the perspective of this usage model, it is not artificial in
-- general and is necessary in order to test the objective.
-- Modify the first list element through the access object:
CC54002_1.District_01_Subscribers.Elements(1).Address := -- Update
"Mapleton, Dartmoor "; -- Implicit dereference. -- through the
-- access
-- object.
-- Retrieve elements of the list:
CC54002_1.District_Subscription_Lists.Get
(CC54002_1.District_01_Subscribers,
TC_Actual_01,
1);
CC54002_1.District_Subscription_Lists.Get
(CC54002_1.District_01_Subscribers,
TC_Actual_02,
2);
-- Verify list contents in two ways: 1st verify the directly-dereferenced
-- access objects against the dereferenced access objects returned by Get;
-- 2nd verify them against objects the expected values:
-- Read
-- through the
-- access
-- objects.
if CC54002_1.District_01_Subscribers.Elements(1).all /= TC_Actual_01.all
or else
CC54002_1.District_01_Subscribers.Elements(2).all /= TC_Actual_02.all
then
Report.Failed ("Wrong results returned by Get");
elsif CC54002_1.District_01_Subscribers.Elements(1).all /=
Mod_Subscriber_01
or
CC54002_1.District_01_Subscribers.Elements(2).all /=
CC54002_1.New_Subscriber_02
then
Report.Failed ("List elements do not have expected values");
end if;
Report.Result;
end CC54002;
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