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-- C393009.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.

--

-- TEST DESCRIPTION:

--      Declare an abstract type in the specification of a generic package.

--      Instantiate the package and derive an extended type from the abstract

--      (instantiated) type; override all abstract operations; use all

--      inherited operations;

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--      14 Oct 95   SAIC    Fixed for ACVC 2.0.1

--

--!

with Report;

procedure C393009 is

  package Display_Devices is

    type Display_Device_Enum is (None, TTY, Console, Big_Screen);

    Display : Display_Device_Enum := None;

  end Display_Devices;

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

  generic

    type Generic_Status is (<>);

    type Serial_Type is (<>);

  package Alert_System is

    type Alert_Type (Serial : Serial_Type) is abstract tagged record

      Status : Generic_Status;

    end record;

    Next_Serial_Number : Serial_Type := Serial_Type'First;

    procedure Handle (A : in out Alert_Type) is abstract;

      -- abstract operation - must be overridden after instantiation

    procedure Display ( A : Alert_Type;

                       On : Display_Devices.Display_Device_Enum);

              -- primitive operation of Alert_Type

              -- not required to be overridden

    function Get_Serial_Number (A : Alert_Type) return Serial_Type;

              -- primitive operation of Alert_Type

              -- not required to be overridden

  end Alert_System;

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

  package body Alert_System is

    procedure Display ( A : in Alert_Type;

                       On : Display_Devices.Display_Device_Enum) is

      begin

        Display_Devices.Display := On;

      end Display;

    function Get_Serial_Number (A : Alert_Type)

      return Serial_Type is

      begin

        return A.Serial;

      end Get_Serial_Number;

  end Alert_System;

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

  package NCC_1701 is

    type Status_Kind is (Green, Yellow, Red);

    type Serial_Number_Type is new Integer range 1..Integer'Last;

    subtype Msg_Str is String (1..16);

    Alert_Msg : Msg_Str := "C393009  passed.";

                        --  123456789A123456

    package Alert_Pkg is new Alert_System (Status_Kind, Serial_Number_Type);

    type New_Alert_Type(Serial : Serial_Number_Type) is

      new Alert_Pkg.Alert_Type(Serial) with record

      Message : Msg_Str;

      end record;

    -- procedure Display is inherited by New_Alert_Type

    -- function Get_Serial_Number is inherited by New_Alert_Type

    procedure Handle (NA : in out New_Alert_Type);  -- must be overridden

    procedure Init   (NA : in out New_Alert_Type);  -- new primitive

    NA : New_Alert_Type(Alert_Pkg.Next_Serial_Number);

         -- New_Alert_Type is not abstract, so an object of that

         -- type may be declared

  end NCC_1701;

  package body NCC_1701 is

    procedure Handle (NA : in out New_Alert_Type) is

    begin

      NA.Message := Alert_Msg;

      Display (NA, On => Display_Devices.TTY);

      end Handle;

    procedure Init (NA : in out New_Alert_Type) is  -- new primitive operation

    begin                                           -- for New_Alert_Type

      NA := (Serial=> NA.Serial, Status => Green, Message => (others => ' '));

    end Init;

   end NCC_1701;

   use NCC_1701;

   use type Display_Devices.Display_Device_Enum;

begin

  Report.Test ("C393009", "Check that an extended type can be derived " &

                          "from an abstract type");

  Init (NA);

  if (Get_Serial_Number (NA) /= 1)

    or (NA.Status /= Green)

    or (Display_Devices.Display /= Display_Devices.None) then

      Report.Failed ("Wrong Initialization");

  end if;

  Handle (NA);

  if (Get_Serial_Number (NA) /= 1)

    or (NA.Status /= Green)

    or (NA.Message /= Alert_Msg)

    or (Display_Devices.Display /= Display_Devices.TTY) then

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

  end if;

  Report.Result;

end C393009;