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1 149 jeremybenn
-- C730A02.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      Check that a private extension (declared in a package specification) of
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--      a tagged type (declared in a different package specification) may be
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--      passed as a generic formal (tagged) private type to a generic package
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--      declaration. Check that the formal type may be further extended with a
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--      private extension in the generic package.
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--
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--      Check that the (visible) components inherited by the "generic"
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--      extension are visible outside the generic package.
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--
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--      Check that, in the instance, the private extension inherits the
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--      user-defined primitive subprograms of the tagged actual, including
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--      those inherited by the actual from its parent.
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--
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-- TEST DESCRIPTION:
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--      Declare a tagged type and an associated primitive subprogram in a
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--      package specification (foundation code). Declare a private extension
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--      of the tagged type and an associated primitive subprogram in a second
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--      package specification. Declare a generic package which takes a tagged
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--      type as a formal parameter, and then extends it with a private
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--      extension (foundation code).
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--
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--      Instantiate the generic package with the private extension from the
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--      second package (the "generic" extension should now have inherited
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--      the primitive subprograms of the private extension from the second
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--      package).
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--
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--      In the main program, call the primitive subprograms inherited by the
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--      "generic" extension. There are two: (1) Create_Book, declared for
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--      the root tagged type in the first package (inherited by the private
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--      extension of the second package, and then in turn by the "generic"
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--      extension), and (2) Update_Pages, declared for the private extension
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--      in the second package. Verify the correctness of the components.
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--
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-- TEST FILES:
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--      The following files comprise this test:
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--
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--         F730A000.A
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--         F730A001.A
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--      => C730A02.A
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--
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--
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-- CHANGE HISTORY:
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--      06 Dec 94   SAIC    ACVC 2.0
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--
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--!
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with F730A001;        -- Book definitions.
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package C730A02_0 is  -- Extended book abstraction.
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   type Detailed_Book_Type is new F730A001.Book_Type          -- Private ext.
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     with private;                                            -- of root tagged
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                                                              -- type.
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   -- Inherits Create_Book from Book_Type.
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   procedure Update_Pages (Book  : in out Detailed_Book_Type; -- Primitive op.
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                           Pages : in     Natural);           -- of extension.
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   -- The following function is needed to verify the value of the
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   -- extension's private component. It will be inherited by extensions
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   -- of Detailed_Book_Type.
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   function Get_Pages (Book : in Detailed_Book_Type) return Natural;
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private
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   type Detailed_Book_Type is new F730A001.Book_Type with record
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      Pages : Natural;
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   end record;
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end C730A02_0;
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     --==================================================================--
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package body C730A02_0 is
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   procedure Update_Pages (Book  : in out Detailed_Book_Type;
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                           Pages : in     Natural) is
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   begin
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      Book.Pages := Pages;
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   end Update_Pages;
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   function Get_Pages (Book : in Detailed_Book_Type) return Natural is
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   begin
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      return (Book.Pages);
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   end Get_Pages;
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end C730A02_0;
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     --==================================================================--
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with F730A001;        -- Book definitions.
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package C730A02_1 is  -- Raw data to be used in creating book elements.
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   Book_Count : constant := 3;
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   subtype Number_Of_Books is Integer range 1 .. Book_Count;
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   type Data_List   is array (Number_Of_Books) of F730A001.Text_Ptr;
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   type Page_Counts is array (Number_Of_Books) of Natural;
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   Title_List  : Data_List   := (new String'("Wuthering Heights"),
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                                 new String'("Heart of Darkness"),
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                                 new String'("Ulysses"));
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   Author_List : Data_List   := (new String'("Bronte, Emily"),
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                                 new String'("Conrad, Joseph"),
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                                 new String'("Joyce, James"));
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   Page_List   : Page_Counts := (237, 215, 456);
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end C730A02_1;
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-- No body for C730A02_1.
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     --==================================================================--
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-- Library-level instantiation. Actual parameter is private extension.
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with C730A02_0;  -- Extended book abstraction.
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with F730A000;   -- Singly-linked list abstraction.
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package C730A02_2 is new F730A000
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  (Parent_Type => C730A02_0.Detailed_Book_Type);
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     --==================================================================--
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with Report;
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with C730A02_0; -- Extended book abstraction.
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with C730A02_1; -- Raw book data.
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with C730A02_2; -- Instance.
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use  C730A02_0; -- Primitive operations of Detailed_Book_Type directly visible.
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use  C730A02_2; -- Operations inherited by Priv_Node_Type directly visible.
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procedure C730A02 is
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   List_Of_Books : Priv_Node_Ptr := null;  -- Head of linked list of books.
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          --========================================================--
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   procedure Create_List (Title, Author : in     C730A02_1.Data_List;
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                          Pages         : in     C730A02_1.Page_Counts;
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                          Head          : in out Priv_Node_Ptr) is
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      Book     : Priv_Node_Type;  -- Object of extended type.
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      Book_Ptr : Priv_Node_Ptr;
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   begin
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      for I in C730A02_1.Number_Of_Books loop
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         Create_Book (Title (I), Author (I), Book);    -- Call twice-inherited
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                                                       -- operation.
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         Update_Pages (Book, Pages (I));               -- Call inherited op.
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         Book_Ptr := new Priv_Node_Type'(Book);
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         Add (Book_Ptr, Head);
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      end loop;
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   end Create_List;
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          --========================================================--
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   function Bad_List_Contents return Boolean is
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      Book1_Ptr : Priv_Node_Ptr;
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      Book2_Ptr : Priv_Node_Ptr;
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      Book3_Ptr : Priv_Node_Ptr;
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   begin
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      Remove (List_Of_Books, Book1_Ptr);
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      Remove (List_Of_Books, Book2_Ptr);
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      Remove (List_Of_Books, Book3_Ptr);
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      return (Book1_Ptr.Title.all   /= "Ulysses"           or   -- Inherited
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              Book1_Ptr.Author.all  /= "Joyce, James"      or   -- components
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              Book2_Ptr.Title.all   /= "Heart of Darkness" or   -- should still
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              Book2_Ptr.Author.all  /= "Conrad, Joseph"    or   -- be visible
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              Book3_Ptr.Title.all   /= "Wuthering Heights" or   -- in private
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              Book3_Ptr.Author.all  /= "Bronte, Emily"     or   -- "generic"
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                                                                -- extension.
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              -- Call inherited operations using dereferenced pointers.
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              Get_Pages (Book1_Ptr.all) /= 456             or
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              Get_Pages (Book2_Ptr.all) /= 215             or
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              Get_Pages (Book3_Ptr.all) /= 237);
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   end Bad_List_Contents;
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          --========================================================--
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begin  -- Main program.
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   Report.Test ("C730A02", "Inheritance of primitive operations: private " &
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                "extension of formal tagged private type; actual is " &
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                "a private extension");
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   -- Create linked list using inherited operation:
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   Create_List (C730A02_1.Title_List, C730A02_1.Author_List,
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                C730A02_1.Page_List,  List_Of_Books);
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   -- Verify results:
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   if Bad_List_Contents then
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      Report.Failed ("Wrong values after call to inherited operations");
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   end if;
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   Report.Result;
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end C730A02;

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