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-- C393007.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.

--*

--

-- TEST OBJECTIVE:

--      Check that an extended type can be derived from an abstract type,

--      where the abstract type is defined in a package, and the type derived

--      from it is defined in a distinct library package.

--

-- TEST DESCRIPTION:

--      Declare an private (abstract) type; declare two primitive operations

--      of the type that are explicitly abstract.

--      Derive an extended type from the (private) abstract type, overriding

--      both of the primitive operations.

--      This test also checks to see that name overloading between abstract

--      and non-abstract functions is resolved correctly.

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--

--!

   package C393007_0 is

        -- Alert_System

     type DT_Type is new Integer;

     type Alert_Type is abstract tagged record

        Time_Of_Arrival : DT_Type;

     end record;

     type Log_File_Type is range 0 .. 100;

     Procedure Handle (A : in out Alert_type) is abstract;

     procedure Log    (A : Alert_Type;

                       L : in out Log_File_Type) is abstract;

     procedure Set_Time (A : in out Alert_Type);

     function Correct_Time_Stamp (A : Alert_Type) return Boolean;

     Day_Time : DT_Type := 100;

   end C393007_0;

    -- Alert_System;

 --=======================================================================--

   package body C393007_0 is

             -- Alert_System

     function Time_Stamp return DT_Type is

       begin

         Day_Time := Day_Time + 1;

         return Day_Time;

       end Time_Stamp;

     procedure Set_Time (A : in out Alert_Type) is

       begin

         A.Time_Of_Arrival := Time_Stamp;

       end Set_time;

     function Correct_Time_Stamp ( A : Alert_Type) return Boolean is

       begin

         return (A.Time_Of_Arrival = Day_Time);

       end Correct_Time_Stamp;

   end C393007_0;

    -- Alert_System;

 --=======================================================================--

 with Report;

 with C393007_0;

   -- Alert_system;

 package C393007_1 is

   type Normal_Alert_Type is

     new C393007_0.Alert_Type

     with null record;

   Log_File: C393007_0.Log_File_Type := C393007_0.Log_File_Type'First;

   procedure Handle (A : in out Normal_Alert_Type);  -- Override is required

   procedure Log    (A : Normal_Alert_Type;          -- Override is required

                     L : in out C393007_0.Log_File_Type);

 end C393007_1;

 package body C393007_1 is

   use type C393007_0.Log_File_Type;

   procedure Handle (A : in out Normal_Alert_Type) is

     begin

       Set_Time (A);

       Log (A, Log_File);

     end Handle;

   procedure Log    (A : Normal_Alert_Type;

                     L : in out C393007_0.Log_File_Type) is

      begin

        L := C393007_0."+"(L, 1);

      end Log;

 end C393007_1;

 with Report;

 with C393007_0;

 with C393007_1;

   -- Alert_system;

 procedure C393007 is

   use C393007_0;

   use C393007_1;

   Alert_One : C393007_1.Normal_Alert_Type;

 begin

   Report.Test ("C393007", "Check that an extended type can be derived " &

                           "from an abstract type");

   Handle (Alert_One);

   if not Correct_Time_Stamp (Alert_One) then

     Report.Failed ("Wrong results from procedure Handle");

   end if;

   if Log_File /=1 then

     Report.Failed ("Wrong results");

   end if;

   Report.Result;

 end C393007;