-- 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;