| -- C3A2A01.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 X'Access of a general access type A, Program_Error is |
| -- raised if the accessibility level of X is deeper than that of A. |
| -- Check for cases where X'Access occurs in an instance body, and A |
| -- is passed as an actual during instantiation. |
| -- |
| -- TEST DESCRIPTION: |
| -- In order to satisfy accessibility requirements, the designated |
| -- object X must be at the same or a less deep nesting level than the |
| -- general access type A -- X must "live" as long as A. Nesting |
| -- levels are the run-time nestings of masters: block statements; |
| -- subprogram, task, and entry bodies; and accept statements. Packages |
| -- are invisible to accessibility rules. |
| -- |
| -- This test declares three generic units, each of which has a formal |
| -- general access type: |
| -- |
| -- (1) A generic package, in which X is declared in the specification, |
| -- and X'Access occurs within the declarative part of the body. |
| -- |
| -- (2) A generic package, in which X is a formal in out object of a |
| -- tagged formal derived type, and X'Access occurs in the sequence |
| -- of statements of a nested subprogram. |
| -- |
| -- (3) A generic procedure, in which X is a dereference of an access |
| -- parameter, and X'Access occurs in the sequence of statements. |
| -- |
| -- The test verifies the following: |
| -- |
| -- For (1), Program_Error is raised upon instantiation if the generic |
| -- package is instantiated at a deeper level than that of the general |
| -- access type passed as an actual. The exception is propagated to the |
| -- innermost enclosing master. |
| -- |
| -- For (2), Program_Error is raised when the nested subprogram is |
| -- called if the object passed as an actual during instantiation of |
| -- the generic package has an accessibility level deeper than that of |
| -- the general access type passed as an actual. The exception is |
| -- handled within the nested subprogram. Also, check that |
| -- Program_Error is not raised if the level of the actual access type |
| -- is deeper than that of the actual object. |
| -- |
| -- For (3), Program_Error is raised when the instance subprogram is |
| -- called if the object pointed to by the actual corresponding to |
| -- the access parameter has an accessibility level deeper than that of |
| -- the general access type passed as an actual during instantiation. |
| -- The exception is handled within the instance subprogram. Also, |
| -- check that Program_Error is not raised if the level of the actual |
| -- access type is deeper than that of the actual corresponding to the |
| -- access parameter. |
| -- |
| -- TEST FILES: |
| -- The following files comprise this test: |
| -- |
| -- F3A2A00.A |
| -- -> C3A2A01.A |
| -- |
| -- |
| -- CHANGE HISTORY: |
| -- 12 May 95 SAIC Initial prerelease version. |
| -- 10 Jul 95 SAIC Modified code to avoid dead variable optimization. |
| -- |
| --! |
| |
| with F3A2A00; |
| generic |
| type FD is new F3A2A00.Array_Type; |
| type FAF is access all FD; |
| package C3A2A01_0 is |
| X : aliased FD; |
| |
| procedure Dummy; -- Needed to allow package body. |
| end C3A2A01_0; |
| |
| |
| --==================================================================-- |
| |
| |
| with Report; |
| package body C3A2A01_0 is |
| Ptr : FAF := X'Access; |
| Index : Integer := F3A2A00.Array_Type'First; |
| |
| procedure Dummy is |
| begin |
| null; |
| end Dummy; |
| begin |
| -- Avoid optimization (dead variable removal of Ptr): |
| |
| if not Report.Equal (Ptr(Index).C, Ptr(Index).C) then -- Always false. |
| Report.Failed ("Unexpected error in C3A2A01_0 instance"); |
| end if; |
| end C3A2A01_0; |
| |
| |
| --==================================================================-- |
| |
| |
| with F3A2A00; |
| generic |
| type FD is new F3A2A00.Tagged_Type with private; |
| type FAF is access all FD; |
| FObj : in out FD; |
| package C3A2A01_1 is |
| procedure Handle (R: out F3A2A00.TC_Result_Kind); |
| end C3A2A01_1; |
| |
| |
| --==================================================================-- |
| |
| |
| with Report; |
| package body C3A2A01_1 is |
| |
| procedure Handle (R: out F3A2A00.TC_Result_Kind) is |
| Ptr : FAF; |
| begin |
| Ptr := FObj'Access; |
| R := F3A2A00.OK; |
| |
| -- Avoid optimization (dead variable removal of Ptr): |
| |
| if not Report.Equal (Ptr.C, Ptr.C) then -- Always false. |
| Report.Failed ("Unexpected error in Handle"); |
| end if; |
| exception |
| when Program_Error => R := F3A2A00.P_E; |
| when others => R := F3A2A00.O_E; |
| end Handle; |
| |
| end C3A2A01_1; |
| |
| |
| --==================================================================-- |
| |
| |
| with F3A2A00; |
| generic |
| type FD is new F3A2A00.Array_Type; |
| type FAF is access all FD; |
| procedure C3A2A01_2 (P: access FD; R: out F3A2A00.TC_Result_Kind); |
| |
| |
| --==================================================================-- |
| |
| |
| with Report; |
| procedure C3A2A01_2 (P: access FD; R: out F3A2A00.TC_Result_Kind) is |
| Ptr : FAF; |
| Index : Integer := F3A2A00.Array_Type'First; |
| begin |
| Ptr := P.all'Access; |
| R := F3A2A00.OK; |
| |
| -- Avoid optimization (dead variable removal of Ptr): |
| |
| if not Report.Equal (Ptr(Index).C, Ptr(Index).C) then -- Always false. |
| Report.Failed ("Unexpected error in C3A2A01_2 instance"); |
| end if; |
| exception |
| when Program_Error => R := F3A2A00.P_E; |
| when others => R := F3A2A00.O_E; |
| end C3A2A01_2; |
| |
| |
| --==================================================================-- |
| |
| |
| with F3A2A00; |
| with C3A2A01_0; |
| with C3A2A01_1; |
| with C3A2A01_2; |
| |
| with Report; |
| procedure C3A2A01 is |
| begin -- C3A2A01. -- [ Level = 1 ] |
| |
| Report.Test ("C3A2A01", "Run-time accessibility checks: instance " & |
| "bodies. Type of X'Access is passed as actual to instance"); |
| |
| |
| SUBTEST1: |
| declare -- [ Level = 2 ] |
| Result : F3A2A00.TC_Result_Kind; |
| begin -- SUBTEST1. |
| |
| declare -- [ Level = 3 ] |
| type AccArr_L3 is access all F3A2A00.Array_Type; |
| begin |
| declare -- [ Level = 4 ] |
| -- The accessibility level of Pack.X is that of the instantiation |
| -- (4). The accessibility level of the actual access type used to |
| -- instantiate Pack is 3. Therefore, the X'Access in Pack |
| -- propagates Program_Error when the instance body is elaborated: |
| |
| package Pack is new C3A2A01_0 (F3A2A00.Array_Type, AccArr_L3); |
| begin |
| Result := F3A2A00.OK; |
| end; |
| exception |
| when Program_Error => Result := F3A2A00.P_E; -- Expected result. |
| when others => Result := F3A2A00.O_E; |
| end; |
| |
| F3A2A00.TC_Display_Results (Result, F3A2A00.P_E, "SUBTEST #1"); |
| |
| end SUBTEST1; |
| |
| |
| |
| SUBTEST2: |
| declare -- [ Level = 2 ] |
| Result : F3A2A00.TC_Result_Kind; |
| begin -- SUBTEST2. |
| |
| declare -- [ Level = 3 ] |
| -- The instantiation of C3A2A01_1 should NOT result in any |
| -- exceptions. |
| |
| type AccTag_L3 is access all F3A2A00.Tagged_Type; |
| |
| package Pack_OK is new C3A2A01_1 (F3A2A00.Tagged_Type, |
| AccTag_L3, |
| F3A2A00.X_L0); |
| begin |
| -- The accessibility level of the actual object used to instantiate |
| -- Pack_OK is 0. The accessibility level of the actual access type |
| -- used to instantiate Pack_OK is 3. Therefore, the FObj'Access in |
| -- Pack_OK.Handle does not raise an exception when the subprogram is |
| -- called. If an exception is (incorrectly) raised, however, it is |
| -- handled within the subprogram: |
| |
| Pack_OK.Handle (Result); |
| end; |
| |
| F3A2A00.TC_Display_Results (Result, F3A2A00.OK, "SUBTEST #2"); |
| |
| exception |
| when Program_Error => |
| Report.Failed ("SUBTEST #2: Program_Error incorrectly raised " & |
| "during instantiation of generic"); |
| when others => |
| Report.Failed ("SUBTEST #2: Unexpected exception raised " & |
| "during instantiation of generic"); |
| end SUBTEST2; |
| |
| |
| |
| SUBTEST3: |
| declare -- [ Level = 2 ] |
| Result : F3A2A00.TC_Result_Kind; |
| begin -- SUBTEST3. |
| |
| declare -- [ Level = 3 ] |
| -- The instantiation of C3A2A01_1 should NOT result in any |
| -- exceptions. |
| |
| X_L3: F3A2A00.Tagged_Type; |
| |
| package Pack_PE is new C3A2A01_1 (F3A2A00.Tagged_Type, |
| F3A2A00.AccTag_L0, |
| X_L3); |
| begin |
| -- The accessibility level of the actual object used to instantiate |
| -- Pack_PE is 3. The accessibility level of the actual access type |
| -- used to instantiate Pack_PE is 0. Therefore, the FObj'Access in |
| -- Pack_OK.Handle raises Program_Error when the subprogram is |
| -- called. The exception is handled within the subprogram: |
| |
| Pack_PE.Handle (Result); |
| end; |
| |
| F3A2A00.TC_Display_Results (Result, F3A2A00.P_E, "SUBTEST #3"); |
| |
| exception |
| when Program_Error => |
| Report.Failed ("SUBTEST #3: Program_Error incorrectly raised " & |
| "during instantiation of generic"); |
| when others => |
| Report.Failed ("SUBTEST #3: Unexpected exception raised " & |
| "during instantiation of generic"); |
| end SUBTEST3; |
| |
| |
| |
| SUBTEST4: |
| declare -- [ Level = 2 ] |
| Result1 : F3A2A00.TC_Result_Kind; |
| Result2 : F3A2A00.TC_Result_Kind; |
| begin -- SUBTEST4. |
| |
| declare -- [ Level = 3 ] |
| -- The instantiation of C3A2A01_2 should NOT result in any |
| -- exceptions. |
| |
| X_L3: aliased F3A2A00.Array_Type; |
| type AccArr_L3 is access all F3A2A00.Array_Type; |
| |
| procedure Proc is new C3A2A01_2 (F3A2A00.Array_Type, AccArr_L3); |
| begin |
| -- The accessibility level of Proc.P.all is that of the corresponding |
| -- actual during the call (in this case 3). The accessibility level of |
| -- the access type used to instantiate Proc is also 3. Therefore, the |
| -- P.all'Access in Proc does not raise an exception when the |
| -- subprogram is called. If an exception is (incorrectly) raised, |
| -- however, it is handled within the subprogram: |
| |
| Proc (X_L3'Access, Result1); |
| |
| F3A2A00.TC_Display_Results (Result1, F3A2A00.OK, |
| "SUBTEST #4: same levels"); |
| |
| declare -- [ Level = 4 ] |
| X_L4: aliased F3A2A00.Array_Type; |
| begin |
| -- Within this block, the accessibility level of the actual |
| -- corresponding to Proc.P.all is 4. Therefore, the P.all'Access |
| -- in Proc raises Program_Error when the subprogram is called. The |
| -- exception is handled within the subprogram: |
| |
| Proc (X_L4'Access, Result2); |
| |
| F3A2A00.TC_Display_Results (Result2, F3A2A00.P_E, |
| "SUBTEST #4: object at deeper level"); |
| end; |
| |
| end; |
| |
| exception |
| when Program_Error => |
| Report.Failed ("SUBTEST #4: Program_Error incorrectly raised " & |
| "during instantiation of generic"); |
| when others => |
| Report.Failed ("SUBTEST #4: Unexpected exception raised " & |
| "during instantiation of generic"); |
| end SUBTEST4; |
| |
| |
| Report.Result; |
| |
| end C3A2A01; |
