-- CC51003.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 record type, and the -- formal derived type is declared in a generic subprogram. -- -- TEST DESCRIPTION: -- Define a discriminated record type in a package. Declare a -- library-level generic subprogram with a formal derived type using the -- record 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 -- record parameter. In the main program, declare record objects with two -- different discriminant values. Derive an indefinite type from the -- record type with a new discriminant part. Instantiate the generic -- subprogram for the root record 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 -- 03 Jan 95 SAIC Removed unknown discriminant part from formal -- derived type. -- 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 CC51003_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 Double_Square (Number : Natural) is record Left : Square (Number); Right : Square (Number); end record; end CC51003_0; -- No body for CC51003_0; --==================================================================-- with CC51003_0; -- Matrix types. generic -- Generic double-matrix "clear" operation. type Dbl_Square is new CC51003_0.Double_Square; -- Indefinite procedure CC51003_1 (Dbl : in out Dbl_Square); -- formal. --==================================================================-- procedure CC51003_1 (Dbl : in out Dbl_Square) is begin for I in 1 .. Dbl.Number loop -- Discriminants inherited from ancestor for J in 1 .. Dbl.Number loop -- type (should work even for derived type -- declaring new discriminant part). Dbl.Left.Mat (I, J) := 0; -- Other components inherited from Dbl.Right.Mat (I, J) := 0; -- ancestor type. end loop; end loop; end CC51003_1; --==================================================================-- with CC51003_0; -- Matrix types. with CC51003_1; -- Generic double-matrix "clear" operation. with Report; procedure CC51003 is use CC51003_0; -- "/=" operator directly visible for Double_Square. -- Matrices of root type: Mat_2x2 : Square(Side => 2) := (Side => 2, Mat => ( (1, 2), (3, 4) )); Dbl_Mat_2x2 : Double_Square(Number => 2) := (2, Mat_2x2, Mat_2x2); Zero_2x2 : constant Square(2) := (2, Mat => ( (0, 0), (0, 0) )); Expected_2x2 : constant Double_Square(2) := (Number => 2, others => Zero_2x2); Mat_3x3 : Square(Side => 3) := (Side => 3, Mat => (1 => (1, 4, 9), others => (1 => 5, others => 7))); Dbl_Mat_3x3 : Double_Square(3) := (Number => 3, others => Mat_3x3); Zero_3x3 : constant Square(3) := (3, Mat => (others => (0,0,0))); Expected_3x3 : constant Double_Square(Number => 3) := (3, Zero_3x3, Zero_3x3); -- Derived type with new discriminant part (which constrains parent): type New_Dbl_Sq (Num : Natural) is new Double_Square(Num); New_Dbl_2x2 : New_Dbl_Sq (Num => 2) := (2, Mat_2x2, Mat_2x2); Expected_New_2x2 : constant New_Dbl_Sq := (Num => 2, others => Zero_2x2); -- Instantiations: procedure Clr_Dbl is new CC51003_1 (Double_Square); procedure Clr_New_Dbl is new CC51003_1 (New_Dbl_Sq); begin Report.Test ("CC51003", "Check that a formal derived record type " & "inherits components, including discriminants, " & "from its ancestor type"); -- Simulate use of matrix manipulation operations. Clr_Dbl (Dbl_Mat_2x2); if (Dbl_Mat_2x2 /= Expected_2x2) then Report.Failed ("Wrong result for root type (2x2 matrix)"); end if; Clr_Dbl (Dbl_Mat_3x3); if (Dbl_Mat_3x3 /= Expected_3x3) then Report.Failed ("Wrong result for root type (3x3 matrix)"); end if; Clr_New_Dbl (New_Dbl_2x2); if (New_Dbl_2x2 /= Expected_New_2x2) then Report.Failed ("Wrong result for derived type (2x2 matrix)"); end if; Report.Result; end CC51003;