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-- C3A0004.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 access to subprogram may be stored within array

 --      objects, and that the access to subprogram can subsequently

 --      be called.

 --

 -- TEST DESCRIPTION:

 --      Declare an access to procedure type in a package specification.

 --      Declare an array of the access type.  Declare three different

 --      procedures that can be referred to by the access to procedure type.

 --

 --      In the main program, build the array by dereferencing the access

 --      value.

 --

 --

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--

 --!

 with Report;

 procedure C3A0004 is

    Left_Turn   : Integer  := 1;

    Right_Turn  : Integer  := 1;

    Center_Turn : Integer  := 1;

    -- Type accesses to any procedure

    type Action_Ptr is access procedure;

    -- Array of access to procedure

    type Action_Array is array (Integer range <>) of Action_Ptr;

    procedure Rotate_Left is

    begin

       Left_Turn := 2;

    end Rotate_Left;

    procedure Rotate_Right is

    begin

       Right_Turn := 3;

    end Rotate_Right;

    procedure Center is

    begin

       Center_Turn := 0;

    end Center;

 begin

    Report.Test ("C3A0004", "Check that access to subprogram may be "

                          & "stored within data structures, and that the "

                          & "access to subprogram can subsequently be called");

    ------------------------------------------------------------------------

    declare

       Total_Actions   : constant := 3;

       Action_Sequence : Action_Array (1 .. Total_Actions);

    begin

       -- Build the action sequence

       Action_Sequence := (Rotate_Left'Access, Center'Access,

                           Rotate_Right'Access);

       -- Assign actions by invoking subprogram designated by access value

       for I in Action_Sequence'Range loop

          Action_Sequence(I).all;

       end loop;

       If Left_Turn /= 2 or Right_Turn /= 3

          or Center_Turn /= 0 then

             Report.Failed ("Incorrect Action sequence result");

       end if;

     end;

    ------------------------------------------------------------------------

    Report.Result;

 end C3A0004;