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-- CC70C02.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 a generic formal package is an instance. Specifically,

--      check that a generic formal package may be passed as an actual

--      parameter to another generic formal package. Check that the

--      visible part of the generic formal package includes the first list of

--      basic declarative items of the package specification.

--

-- TEST DESCRIPTION:

--      A generic formal package is a package, and is an instance.

--

--      Declare a list type in a generic package for lists of elements of any

--      nonlimited type (foundation code). Declare a second generic package

--      which declares operations for the list type, and parameterize it with

--      a generic formal package with the list-type package as template

--      (foundation code). Declare a third generic package which declares

--      additional operations for the list type, and parameterize it with two

--      generic formal packages, one with the list-type package as template,

--      the other with the second generic package as template. Use the first

--      formal package as the generic formal actual part for the second formal

--      package.

--

-- TEST FILES:

--      The following files comprise this test:

--

--         FC70C00.A

--         CC70C02.A

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--

--!

with FC70C00_0;                -- List abstraction.

with FC70C00_1;                -- Basic list operations.

generic

   -- Import both the list-type abstraction defined in FC70C00_0 and the basic

   -- list operations defined in FC70C00_1. To ensure that only basic operation

   -- instances for lists of the same element type as that used to instantiate

   -- the list type are accepted as actuals to this generic, pass the list-type

   -- formal package as an actual parameter to the list-operation formal

   -- package.

   with package Lists          is new FC70C00_0 (<>);

   with package Basic_List_Ops is new FC70C00_1 (Lists);

package CC70C02_0 is           -- Additional list operations.

   End_of_List_Reached : exception;

   -- Read from current element and advance "current" pointer.

   procedure Read_Element (L : in out Lists.List_Type;

                           E :    out Lists.Element_Type);

   -- Add element to end of list.

   procedure Add_Element (L : in out Lists.List_Type;

                          E : in     Lists.Element_Type);

end CC70C02_0;

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

package body CC70C02_0 is

   procedure Read_Element (L : in out Lists.List_Type;

                           E :    out Lists.Element_Type) is

   begin

      if Basic_List_Ops.End_Of_List (L) then  -- Use of op from the previous

         raise End_Of_List_Reached;           -- generic package.

      else

         E         := L.Current.Item;         -- Retrieve current element.

         L.Current := L.Current.Next;         -- Advance "current" pointer.

      end if;

   end Read_Element;

   procedure Add_Element (L : in out Lists.List_Type;

                          E : in     Lists.Element_Type) is

      New_Node : Lists.Node_Pointer := new Lists.Node_Type'(E, null);

      use type Lists.Node_Pointer;

   begin

      if L.First = null then                -- No elements in list, so add new

         L.First := New_Node;               -- element at beginning of list.

      else

         L.Last.Next := New_Node;           -- Add new element at end of list.

      end if;

      L.Last := New_Node;                   -- Set last-in-list pointer.

   end Add_Element;

end CC70C02_0;

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

with FC70C00_0;  -- Generic list type abstraction.

with FC70C00_1;  -- Generic list operations.

with CC70C02_0;  -- Additional generic list operations.

with Report;

procedure CC70C02 is

   type Points is range 0 .. 100;                     -- Discrete type.

   package Lists_of_Points is new FC70C00_0 (Points); -- Points lists.

   package Basic_Point_Ops is new                     -- Basic points-list ops.

     FC70C00_1 (Lists_Of_Points);

   package Points_List_Ops is new                     -- More points-list ops.

     CC70C02_0 (Lists          => Lists_Of_Points,

                Basic_List_Ops => Basic_Point_Ops);

   Scores : Lists_of_Points.List_Type;                -- List of points.

   -- Begin test code declarations: -----------------------

   type TC_Score_Array is array (1 .. 3) of Points;

   TC_List_Values : constant TC_Score_Array := (23, 15,  0);

   TC_Correct_List_Values : Boolean := False;

   procedure TC_Initialize_List (L : in out Lists_Of_Points.List_Type) is

   begin                                  -- Initial list contains 3 scores

      for I in TC_Score_Array'Range loop  -- with the values 23, 15, and 0.

         Points_List_Ops.Add_Element (L, TC_List_Values(I));

      end loop;

   end TC_Initialize_List;

   procedure TC_Verify_List (L        : in out Lists_Of_Points.List_Type;

                             Expected : in     TC_Score_Array;

                             OK       :    out Boolean) is

      Actual : TC_Score_Array;

   begin

      Basic_Point_Ops.Reset (L);

      for I in TC_Score_Array'Range loop

         Points_List_Ops.Read_Element (L, Actual(I));

      end loop;

      OK := (Actual = Expected);

   end TC_Verify_List;

   -- End test code declarations. -------------------------

begin

   Report.Test ("CC70C02", "Check that a generic formal package may be " &

                "passed as an actual to another formal package");

   TC_Initialize_List (Scores);

   TC_Verify_List (Scores, TC_List_Values, TC_Correct_List_Values);

   if not TC_Correct_List_Values then

      Report.Failed ("List contains incorrect values");

   end if;

   Report.Result;

end CC70C02;