| -- 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; |