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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;
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