| -- C392005.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, for an implicitly declared dispatching operation that is |
| -- overridden, the body executed is the body for the overriding |
| -- subprogram, even if the overriding occurs in a private part. |
| -- |
| -- Check for the case where the overriding operations are declared in a |
| -- public child unit of the package declaring the parent type, and the |
| -- descendant type is a private extension. |
| -- |
| -- Check for both dispatching and nondispatching calls. |
| -- |
| -- |
| -- TEST DESCRIPTION: |
| -- Consider: |
| -- |
| -- package Parent is |
| -- type Root is tagged ... |
| -- procedure Vis_Op (P: Root); |
| -- private |
| -- procedure Pri_Op (P: Root); |
| -- end Parent; |
| -- |
| -- package Parent.Child is |
| -- type Derived is new Root with private; |
| -- -- Implicit Vis_Op (P: Derived) declared here. |
| -- |
| -- procedure Pri_Op (P: Derived); -- (A) |
| -- ... |
| -- private |
| -- type Derived is new Root with record... |
| -- -- Implicit Pri_Op (P: Derived) declared here. |
| |
| -- procedure Vis_Op (P: Derived); -- (B) |
| -- ... |
| -- end Parent.Child; |
| -- |
| -- Type Derived inherits both Vis_Op and Pri_Op from the ancestor type |
| -- Root. Note, however, that Vis_Op is implicitly declared in the visible |
| -- part, whereas Pri_Op is implicitly declared in the private part |
| -- (inherited subprograms for a private extension are implicitly declared |
| -- after the private_extension_declaration if the corresponding |
| -- declaration from the ancestor is visible at that place; otherwise the |
| -- inherited subprogram is not declared for the private extension, |
| -- although it might be for the full type). |
| -- |
| -- Even though Root's version of Pri_Op hasn't been implicitly declared |
| -- for Derived at the time Derived's version of Pri_Op has been |
| -- explicitly declared, the explicit Pri_Op still overrides the implicit |
| -- version. |
| -- Also, even though the explicit Vis_Op for Derived is declared in the |
| -- private part it still overrides the implicit version declared in the |
| -- visible part. Calls with tag Derived will execute (A) and (B). |
| -- |
| -- |
| -- CHANGE HISTORY: |
| -- 06 Dec 94 SAIC ACVC 2.0 |
| -- 26 Nov 96 SAIC Improved for ACVC 2.1 |
| -- |
| --! |
| |
| package C392005_0 is |
| |
| type Remote_Camera is tagged private; |
| |
| type Depth_Of_Field is range 5 .. 100; |
| type Shutter_Speed is (One, Two_Fifty, Four_Hundred, Thousand); |
| type Aperture is (Eight, Sixteen, Thirty_Two); |
| |
| -- ...Other declarations. |
| |
| procedure Focus (Cam : in out Remote_Camera; |
| Depth : in Depth_Of_Field); |
| |
| procedure Self_Test (C: in out Remote_Camera'Class); |
| |
| -- ...Other operations. |
| |
| function TC_Get_Depth (C: Remote_Camera) return Depth_Of_Field; |
| function TC_Get_Speed (C: Remote_Camera) return Shutter_Speed; |
| |
| private |
| |
| type Remote_Camera is tagged record |
| DOF : Depth_Of_Field := 10; |
| Shutter: Shutter_Speed := One; |
| FStop : Aperture := Eight; |
| end record; |
| |
| procedure Set_Shutter_Speed (C : in out Remote_Camera; |
| Speed : in Shutter_Speed); |
| |
| -- For the basic remote camera, shutter speed might be set as a function of |
| -- focus perhaps, thus it is declared as a private operation (usable |
| -- only internally within the abstraction). |
| |
| function Set_Aperture (C : Remote_Camera) return Aperture; |
| |
| end C392005_0; |
| |
| |
| --==================================================================-- |
| |
| |
| package body C392005_0 is |
| |
| procedure Focus (Cam : in out Remote_Camera; |
| Depth : in Depth_Of_Field) is |
| begin |
| -- Artificial for testing purposes. |
| Cam.DOF := 46; |
| end Focus; |
| |
| ----------------------------------------------------------- |
| procedure Set_Shutter_Speed (C : in out Remote_Camera; |
| Speed : in Shutter_Speed) is |
| begin |
| -- Artificial for testing purposes. |
| C.Shutter := Thousand; |
| end Set_Shutter_Speed; |
| |
| ----------------------------------------------------------- |
| function Set_Aperture (C : Remote_Camera) return Aperture is |
| begin |
| -- Artificial for testing purposes. |
| return Thirty_Two; |
| end Set_Aperture; |
| |
| ----------------------------------------------------------- |
| procedure Self_Test (C: in out Remote_Camera'Class) is |
| TC_Dummy_Depth : constant Depth_Of_Field := 23; |
| TC_Dummy_Speed : constant Shutter_Speed := Four_Hundred; |
| begin |
| |
| -- Test focus at various depths: |
| Focus(C, TC_Dummy_Depth); |
| -- ...Additional calls to Focus. |
| |
| -- Test various shutter speeds: |
| Set_Shutter_Speed(C, TC_Dummy_Speed); |
| -- ...Additional calls to Set_Shutter_Speed. |
| |
| end Self_Test; |
| |
| ----------------------------------------------------------- |
| function TC_Get_Depth (C: Remote_Camera) return Depth_Of_Field is |
| begin |
| return C.DOF; |
| end TC_Get_Depth; |
| |
| ----------------------------------------------------------- |
| function TC_Get_Speed (C: Remote_Camera) return Shutter_Speed is |
| begin |
| return C.Shutter; |
| end TC_Get_Speed; |
| |
| end C392005_0; |
| |
| --==================================================================-- |
| |
| |
| package C392005_0.C392005_1 is |
| |
| type Auto_Speed is new Remote_Camera with private; |
| |
| |
| -- procedure Focus (C : in out Auto_Speed; -- Implicitly declared |
| -- Depth : in Depth_Of_Field) -- here. |
| |
| -- For the improved remote camera, shutter speed can be set manually, |
| -- so it is declared as a public operation. |
| |
| -- The order of declarations for Set_Aperture and Set_Shutter_Speed are |
| -- reversed from the original declarations to trap potential compiler |
| -- problems related to subprogram ordering. |
| |
| function Set_Aperture (C : Auto_Speed) return Aperture; -- Overrides |
| -- inherited op. |
| |
| procedure Set_Shutter_Speed (C : in out Auto_Speed; -- Overrides |
| Speed : in Shutter_Speed);-- inherited op. |
| |
| -- Set_Shutter_Speed and Set_Aperture override the operations inherited |
| -- from the parent, even though the inherited operations are not implicitly |
| -- declared until the private part below. |
| |
| type New_Camera is private; |
| |
| function TC_Get_Aper (C: New_Camera) return Aperture; |
| |
| -- ...Other operations. |
| |
| private |
| type Film_Speed is (One_Hundred, Two_Hundred, Four_Hundred); |
| |
| type Auto_Speed is new Remote_Camera with record |
| ASA : Film_Speed; |
| end record; |
| |
| -- procedure Set_Shutter_Speed (C : in out Auto_Speed; -- Implicitly |
| -- Speed : in Shutter_Speed) -- declared |
| -- here. |
| |
| -- function Set_Aperture (C : Auto_Speed) return Aperture; -- Implicitly |
| -- declared. |
| |
| procedure Focus (C : in out Auto_Speed; -- Overrides |
| Depth : in Depth_Of_Field); -- inherited op. |
| |
| -- For the improved remote camera, perhaps the focusing algorithm is |
| -- different, so the original Focus operation is overridden here. |
| |
| Auto_Camera : Auto_Speed; |
| |
| type New_Camera is record |
| Aper : Aperture := Set_Aperture (Auto_Camera); -- Calls the overridden, |
| end record; -- not the inherited op. |
| |
| end C392005_0.C392005_1; |
| |
| |
| --==================================================================-- |
| |
| |
| package body C392005_0.C392005_1 is |
| |
| procedure Focus (C : in out Auto_Speed; |
| Depth : in Depth_Of_Field) is |
| begin |
| -- Artificial for testing purposes. |
| C.DOF := 57; |
| end Focus; |
| |
| --------------------------------------------------------------- |
| procedure Set_Shutter_Speed (C : in out Auto_Speed; |
| Speed : in Shutter_Speed) is |
| begin |
| -- Artificial for testing purposes. |
| C.Shutter := Two_Fifty; |
| end Set_Shutter_Speed; |
| |
| ----------------------------------------------------------- |
| function Set_Aperture (C : Auto_Speed) return Aperture is |
| begin |
| -- Artificial for testing purposes. |
| return Sixteen; |
| end Set_Aperture; |
| |
| ----------------------------------------------------------- |
| function TC_Get_Aper (C: New_Camera) return Aperture is |
| begin |
| return C.Aper; |
| end TC_Get_Aper; |
| |
| end C392005_0.C392005_1; |
| |
| |
| --==================================================================-- |
| |
| |
| with C392005_0.C392005_1; |
| |
| with Report; |
| |
| procedure C392005 is |
| Basic_Camera : C392005_0.Remote_Camera; |
| Auto_Camera1 : C392005_0.C392005_1.Auto_Speed; |
| Auto_Camera2 : C392005_0.C392005_1.Auto_Speed; |
| Auto_Depth : C392005_0.Depth_Of_Field := 67; |
| New_Camera1 : C392005_0.C392005_1.New_Camera; |
| TC_Expected_Basic_Depth : constant C392005_0.Depth_Of_Field := 46; |
| TC_Expected_Auto_Depth : constant C392005_0.Depth_Of_Field := 57; |
| TC_Expected_Basic_Speed : constant C392005_0.Shutter_Speed |
| := C392005_0.Thousand; |
| TC_Expected_Auto_Speed : constant C392005_0.Shutter_Speed |
| := C392005_0.Two_Fifty; |
| TC_Expected_New_Aper : constant C392005_0.Aperture |
| := C392005_0.Sixteen; |
| |
| use type C392005_0.Depth_Of_Field; |
| use type C392005_0.Shutter_Speed; |
| use type C392005_0.Aperture; |
| |
| begin |
| Report.Test ("C392005", "Dispatching for overridden primitive " & |
| "subprograms: private extension declared in child unit, " & |
| "parent is tagged private whose full view is tagged record"); |
| |
| -- Call the class-wide operation for Remote_Camera'Class, which itself makes |
| -- dispatching calls to Focus and Set_Shutter_Speed: |
| |
| |
| -- For an object of type Remote_Camera, the dispatching calls should |
| -- dispatch to the bodies declared for the root type: |
| |
| C392005_0.Self_Test(Basic_Camera); |
| |
| if C392005_0.TC_Get_Depth (Basic_Camera) /= TC_Expected_Basic_Depth |
| or else C392005_0.TC_Get_Speed (Basic_Camera) /= TC_Expected_Basic_Speed |
| then |
| Report.Failed ("Calls dispatched incorrectly for root type"); |
| end if; |
| |
| |
| -- For an object of type Auto_Speed, the dispatching calls should |
| -- dispatch to the bodies declared for the derived type: |
| |
| C392005_0.Self_Test(Auto_Camera1); |
| |
| if C392005_0.C392005_1.TC_Get_Depth(Auto_Camera1) /= TC_Expected_Auto_Depth |
| |
| or |
| C392005_0.C392005_1.TC_Get_Speed(Auto_Camera1) /= TC_Expected_Auto_Speed |
| then |
| Report.Failed ("Calls dispatched incorrectly for derived type"); |
| end if; |
| |
| -- For an object of type Auto_Speed, a non-dispatching call to Focus should |
| |
| -- execute the body declared for the derived type (even through it is |
| -- declared in the private part). |
| |
| C392005_0.C392005_1.Focus (Auto_Camera2, Auto_Depth); |
| |
| if C392005_0.C392005_1.TC_Get_Depth(Auto_Camera2) /= TC_Expected_Auto_Depth |
| |
| then |
| Report.Failed ("Non-dispatching call to privately overriding " & |
| "subprogram executed the wrong body"); |
| end if; |
| |
| -- For an object of type New_Camera, the initialization using Set_Ap |
| -- should execute the overridden body, not the inherited one. |
| |
| if C392005_0.C392005_1.TC_Get_Aper (New_Camera1) /= TC_Expected_New_Aper |
| then |
| Report.Failed ("Non-dispatching call to visible overriding " & |
| "subprogram executed the wrong body"); |
| end if; |
| |
| Report.Result; |
| |
| end C392005; |
