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-- CC3019B1.ADA

--                             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.

--*

--  THIS IS GENERIC PACKAGE WHICH IS USED TO CHECK THE LEVEL OF

--  NESTED GENERICS SUPPORTED BY AN IMPLEMENTATION. IT IS USED

--  BY THE MAIN PROCEDURE, I.E., CC3019B2M.ADA.

--

-- *** THIS FILE MUST BE COMPILED AFTER CC3019B0.ADA HAS BEEN

-- *** COMPILED.

--

-- HISTORY:

--         EDWARD V. BERARD, 31 AUGUST 1990

WITH CC3019B0_LIST_CLASS ;

GENERIC

     TYPE ELEMENT IS LIMITED PRIVATE ;

     WITH PROCEDURE ASSIGN (SOURCE        : IN OUT ELEMENT ;

                            DESTINATION   : IN OUT ELEMENT) ;

     WITH FUNCTION "=" (LEFT  : IN ELEMENT ;

                        RIGHT : IN ELEMENT) RETURN BOOLEAN ;

PACKAGE CC3019B1_STACK_CLASS IS

     TYPE STACK IS LIMITED PRIVATE ;

     OVERFLOW    : EXCEPTION ;

     UNDERFLOW   : EXCEPTION ;

     PROCEDURE PUSH (THIS_ELEMENT        : IN OUT ELEMENT ;

                     ON_TO_THIS_STACK    : IN OUT STACK) ;

     PROCEDURE POP  (THIS_ELEMENT        : IN OUT ELEMENT ;

                     OFF_THIS_STACK      : IN OUT STACK) ;

     PROCEDURE COPY  (THIS_STACK       : IN OUT STACK ;

                      TO_THIS_STACK    : IN OUT STACK) ;

     PROCEDURE CLEAR (THIS_STACK       : IN OUT STACK) ;

     GENERIC

          WITH PROCEDURE PROCESS (THIS_ELEMENT    : IN  ELEMENT ;

                                  CONTINUE        : OUT BOOLEAN) ;

     PROCEDURE ITERATE (OVER_THIS_STACK    : IN STACK) ;

     FUNCTION NUMBER_OF_ELEMENTS (ON_THIS_STACK    : IN STACK)

          RETURN NATURAL ;

     FUNCTION "=" (LEFT  : IN STACK ;

                   RIGHT : IN STACK) RETURN BOOLEAN ;

PRIVATE

     PACKAGE NEW_LIST_CLASS IS

          NEW CC3019B0_LIST_CLASS (ELEMENT => ELEMENT,

                                   ASSIGN  => ASSIGN,

                                   "="     => "=") ;

     TYPE STACK IS NEW NEW_LIST_CLASS.LIST ;

END CC3019B1_STACK_CLASS ;

PACKAGE BODY CC3019B1_STACK_CLASS IS

     PROCEDURE PUSH (THIS_ELEMENT        : IN OUT ELEMENT ;

                     ON_TO_THIS_STACK    : IN OUT STACK) IS

     BEGIN  -- PUSH

          NEW_LIST_CLASS.ADD (

               THIS_ELEMENT    => THIS_ELEMENT,

               TO_THIS_LIST    =>

                    NEW_LIST_CLASS.LIST (ON_TO_THIS_STACK)) ;

     EXCEPTION

          WHEN NEW_LIST_CLASS.OVERFLOW => RAISE OVERFLOW ;

     END PUSH ;

     PROCEDURE POP  (THIS_ELEMENT        : IN OUT ELEMENT ;

                     OFF_THIS_STACK      : IN OUT STACK) IS

     BEGIN  -- POP

          NEW_LIST_CLASS.DELETE (

               THIS_ELEMENT      => THIS_ELEMENT,

               FROM_THIS_LIST    =>

                         NEW_LIST_CLASS.LIST (OFF_THIS_STACK)) ;

     EXCEPTION

          WHEN NEW_LIST_CLASS.UNDERFLOW => RAISE UNDERFLOW ;

     END POP ;

     PROCEDURE COPY  (THIS_STACK       : IN OUT STACK ;

                      TO_THIS_STACK    : IN OUT STACK) IS

     BEGIN  -- COPY

          NEW_LIST_CLASS.COPY (

               THIS_LIST    => NEW_LIST_CLASS.LIST (THIS_STACK),

               TO_THIS_LIST => NEW_LIST_CLASS.LIST (TO_THIS_STACK)) ;

     END COPY ;

     PROCEDURE CLEAR (THIS_STACK        : IN OUT STACK) IS

     BEGIN  -- CLEAR

          NEW_LIST_CLASS.CLEAR (NEW_LIST_CLASS.LIST (THIS_STACK)) ;

     END CLEAR ;

     PROCEDURE ITERATE (OVER_THIS_STACK    : IN STACK) IS

          PROCEDURE STACK_ITERATE IS NEW NEW_LIST_CLASS.ITERATE

               (PROCESS => PROCESS) ;

     BEGIN  -- ITERATE

          STACK_ITERATE (NEW_LIST_CLASS.LIST (OVER_THIS_STACK)) ;

     END ITERATE ;

     FUNCTION NUMBER_OF_ELEMENTS (ON_THIS_STACK    : IN STACK)

          RETURN NATURAL IS

     BEGIN  -- NUMBER_OF_ELEMENTS

          RETURN NEW_LIST_CLASS.NUMBER_OF_ELEMENTS

               (IN_THIS_LIST => NEW_LIST_CLASS.LIST (ON_THIS_STACK)) ;

     END NUMBER_OF_ELEMENTS ;

     FUNCTION "=" (LEFT  : IN STACK ;

                   RIGHT : IN STACK) RETURN BOOLEAN IS

     BEGIN  -- "="

          RETURN NEW_LIST_CLASS."=" (

               LEFT  => NEW_LIST_CLASS.LIST (LEFT),

               RIGHT => NEW_LIST_CLASS.LIST (RIGHT)) ;

     END "=" ;

END CC3019B1_STACK_CLASS ;