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-- CC51004.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 if the ancestor type of a formal derived type is a composite

--      type that is not an array type, the formal type inherits components,

--      including discriminants, from the ancestor type.

--

--      Check for the case where the ancestor type is a tagged type, and the

--      formal derived type is declared in a generic subprogram.

--

-- TEST DESCRIPTION:

--      Define a discriminated tagged type in a package. Declare a

--      library-level generic subprogram with a formal derived type using the

--      tagged type as ancestor. Give the generic subprogram an in out

--      parameter of the formal derived type. Inside the generic, use the

--      discriminant component and modify the remaining components of the

--      tagged parameter. In the main program, declare tagged record objects

--      with two different discriminant values. Derive an indefinite type from

--      the tagged type with a new discriminant part. Instantiate the

--      generic subprogram for the root tagged subtype and the derived subtype.

--      Call the root subtype instance with actual parameters having the two

--      discriminant values. Also call the derived subtype instance with an

--      appropriate actual.

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--      05 Jan 94   SAIC    Removed unknown discriminant part from formal

--                          derived type. Moved declaration of type

--                          New_Dbl_Sq from main subprogram to CC51004_0.

--      05 Nov 95   SAIC    ACVC 2.0.1 fixes: Removed constrained subtype

--                          instantiation and associated declarations.

--                          Modified commentary.

--

--!

-- Simulate a fragment of a matrix manipulation application.

package CC51004_0 is  -- Matrix types.

   type Matrix is array (Natural range <>, Natural range <>) of Integer;

   type Square (Side : Natural) is record

      Mat : Matrix (1 .. Side, 1 .. Side);

   end record;

   type Sq_Type (Num1 : Natural) is tagged record

      One : Square (Num1);

   end record;

   -- Extended type with new discriminant part (which constrains parent):

   type New_Dbl_Sq (Num2 : Natural) is new Sq_Type(Num2) with record

      Two : Square (Num2);

   end record;

end CC51004_0;

-- No body for CC51004_0;

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

with CC51004_0;  -- Matrix types.

generic          -- Generic matrix "clear" operation.

   type Squares is new CC51004_0.Sq_Type with private;       -- Indefinite

procedure CC51004_1 (Sq : in out Squares);                   -- formal.

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

procedure CC51004_1 (Sq : in out Squares) is

begin

   for I in 1 .. Sq.Num1 loop        -- Discriminants inherited from ancestor

      for J in 1 .. Sq.Num1 loop     -- type (should work even for derived type

                                     -- declaring new discriminant part).

         Sq.One.Mat (I, J) := 0;     -- Other components inherited from

                                     -- ancestor type.

      end loop;

   end loop;

end CC51004_1;

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

with CC51004_0;  -- Matrix types.

with CC51004_1;  -- Generic double-matrix "clear" operation.

with Report;

procedure CC51004 is

   use CC51004_0;  -- "/=" operator directly visible for Sq_Type.

   -- Matrices of root type:

   Mat_2x2      : Square(Side => 2)  := (Side => 2, Mat => ( (1, 2), (3, 4) ));

   One_Mat_2x2  : Sq_Type(Num1 => 2) := (2, Mat_2x2);

   Zero_2x2     : constant Square(2)  := (2, Mat => ( (0, 0), (0, 0) ));

   Expected_2x2 : constant Sq_Type(2) := (Num1 => 2, One => Zero_2x2);

   Mat_3x3      : Square(Side => 3) := (Side => 3,

                                        Mat  => (1      => (5, 2, 7),

                                                 others => (1      => 4,

                                                            others => 9)));

   One_Mat_3x3  : Sq_Type(3)        := (Num1 => 3, One => Mat_3x3);

   Zero_3x3     : constant Square(3)        := (3, Mat => (others => (0,0,0)));

   Expected_3x3 : constant Sq_Type(Num1 => 3) := (3, Zero_3x3);

   New_Dbl_2x2      : New_Dbl_Sq(Num2 => 2) := (2, others => Mat_2x2);

   Expected_New_2x2 : constant New_Dbl_Sq := (2, Zero_2x2, Mat_2x2);

   -- Instantiations:

   procedure Clr_Mat is new CC51004_1 (Sq_Type);

   procedure Clr_New_Dbl is new CC51004_1 (New_Dbl_Sq);

begin

   Report.Test ("CC51004", "Check that a formal derived tagged type " &

                           "inherits components, including discriminants, " &

                           "from its ancestor type");

   -- Simulate use of matrix manipulation operations.

   Clr_Mat (One_Mat_2x2);

   if (One_Mat_2x2 /= Expected_2x2) then

      Report.Failed ("Wrong result root type (2x2 matrix)");

   end if;

   Clr_Mat (One_Mat_3x3);

   if (One_Mat_3x3 /= Expected_3x3) then

      Report.Failed ("Wrong result root type (3x3 matrix)");

   end if;

   Clr_New_Dbl (New_Dbl_2x2);

   if (New_Dbl_2x2 /= Expected_New_2x2) then

      Report.Failed ("Wrong result extended type (2x2 matrix)");

   end if;

   Report.Result;

end CC51004;