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-- C730A02.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 private extension (declared in a package specification) of
-- a tagged type (declared in a different package specification) may be
-- passed as a generic formal (tagged) private type to a generic package
-- declaration. Check that the formal type may be further extended with a
-- private extension in the generic package.
--
-- Check that the (visible) components inherited by the "generic"
-- extension are visible outside the generic package.
--
-- Check that, in the instance, the private extension inherits the
-- user-defined primitive subprograms of the tagged actual, including
-- those inherited by the actual from its parent.
--
-- TEST DESCRIPTION:
-- Declare a tagged type and an associated primitive subprogram in a
-- package specification (foundation code). Declare a private extension
-- of the tagged type and an associated primitive subprogram in a second
-- package specification. Declare a generic package which takes a tagged
-- type as a formal parameter, and then extends it with a private
-- extension (foundation code).
--
-- Instantiate the generic package with the private extension from the
-- second package (the "generic" extension should now have inherited
-- the primitive subprograms of the private extension from the second
-- package).
--
-- In the main program, call the primitive subprograms inherited by the
-- "generic" extension. There are two: (1) Create_Book, declared for
-- the root tagged type in the first package (inherited by the private
-- extension of the second package, and then in turn by the "generic"
-- extension), and (2) Update_Pages, declared for the private extension
-- in the second package. Verify the correctness of the components.
--
-- TEST FILES:
-- The following files comprise this test:
--
-- F730A000.A
-- F730A001.A
-- => C730A02.A
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
with F730A001; -- Book definitions.
package C730A02_0 is -- Extended book abstraction.
type Detailed_Book_Type is new F730A001.Book_Type -- Private ext.
with private; -- of root tagged
-- type.
-- Inherits Create_Book from Book_Type.
procedure Update_Pages (Book : in out Detailed_Book_Type; -- Primitive op.
Pages : in Natural); -- of extension.
-- The following function is needed to verify the value of the
-- extension's private component. It will be inherited by extensions
-- of Detailed_Book_Type.
function Get_Pages (Book : in Detailed_Book_Type) return Natural;
private
type Detailed_Book_Type is new F730A001.Book_Type with record
Pages : Natural;
end record;
end C730A02_0;
--==================================================================--
package body C730A02_0 is
procedure Update_Pages (Book : in out Detailed_Book_Type;
Pages : in Natural) is
begin
Book.Pages := Pages;
end Update_Pages;
function Get_Pages (Book : in Detailed_Book_Type) return Natural is
begin
return (Book.Pages);
end Get_Pages;
end C730A02_0;
--==================================================================--
with F730A001; -- Book definitions.
package C730A02_1 is -- Raw data to be used in creating book elements.
Book_Count : constant := 3;
subtype Number_Of_Books is Integer range 1 .. Book_Count;
type Data_List is array (Number_Of_Books) of F730A001.Text_Ptr;
type Page_Counts is array (Number_Of_Books) of Natural;
Title_List : Data_List := (new String'("Wuthering Heights"),
new String'("Heart of Darkness"),
new String'("Ulysses"));
Author_List : Data_List := (new String'("Bronte, Emily"),
new String'("Conrad, Joseph"),
new String'("Joyce, James"));
Page_List : Page_Counts := (237, 215, 456);
end C730A02_1;
-- No body for C730A02_1.
--==================================================================--
-- Library-level instantiation. Actual parameter is private extension.
with C730A02_0; -- Extended book abstraction.
with F730A000; -- Singly-linked list abstraction.
package C730A02_2 is new F730A000
(Parent_Type => C730A02_0.Detailed_Book_Type);
--==================================================================--
with Report;
with C730A02_0; -- Extended book abstraction.
with C730A02_1; -- Raw book data.
with C730A02_2; -- Instance.
use C730A02_0; -- Primitive operations of Detailed_Book_Type directly visible.
use C730A02_2; -- Operations inherited by Priv_Node_Type directly visible.
procedure C730A02 is
List_Of_Books : Priv_Node_Ptr := null; -- Head of linked list of books.
--========================================================--
procedure Create_List (Title, Author : in C730A02_1.Data_List;
Pages : in C730A02_1.Page_Counts;
Head : in out Priv_Node_Ptr) is
Book : Priv_Node_Type; -- Object of extended type.
Book_Ptr : Priv_Node_Ptr;
begin
for I in C730A02_1.Number_Of_Books loop
Create_Book (Title (I), Author (I), Book); -- Call twice-inherited
-- operation.
Update_Pages (Book, Pages (I)); -- Call inherited op.
Book_Ptr := new Priv_Node_Type'(Book);
Add (Book_Ptr, Head);
end loop;
end Create_List;
--========================================================--
function Bad_List_Contents return Boolean is
Book1_Ptr : Priv_Node_Ptr;
Book2_Ptr : Priv_Node_Ptr;
Book3_Ptr : Priv_Node_Ptr;
begin
Remove (List_Of_Books, Book1_Ptr);
Remove (List_Of_Books, Book2_Ptr);
Remove (List_Of_Books, Book3_Ptr);
return (Book1_Ptr.Title.all /= "Ulysses" or -- Inherited
Book1_Ptr.Author.all /= "Joyce, James" or -- components
Book2_Ptr.Title.all /= "Heart of Darkness" or -- should still
Book2_Ptr.Author.all /= "Conrad, Joseph" or -- be visible
Book3_Ptr.Title.all /= "Wuthering Heights" or -- in private
Book3_Ptr.Author.all /= "Bronte, Emily" or -- "generic"
-- extension.
-- Call inherited operations using dereferenced pointers.
Get_Pages (Book1_Ptr.all) /= 456 or
Get_Pages (Book2_Ptr.all) /= 215 or
Get_Pages (Book3_Ptr.all) /= 237);
end Bad_List_Contents;
--========================================================--
begin -- Main program.
Report.Test ("C730A02", "Inheritance of primitive operations: private " &
"extension of formal tagged private type; actual is " &
"a private extension");
-- Create linked list using inherited operation:
Create_List (C730A02_1.Title_List, C730A02_1.Author_List,
C730A02_1.Page_List, List_Of_Books);
-- Verify results:
if Bad_List_Contents then
Report.Failed ("Wrong values after call to inherited operations");
end if;
Report.Result;
end C730A02;
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