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Diffstat (limited to 'gcc/testsuite/ada/acats/tests/c4/c460a01.a')
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diff --git a/gcc/testsuite/ada/acats/tests/c4/c460a01.a b/gcc/testsuite/ada/acats/tests/c4/c460a01.a new file mode 100644 index 000000000..2d583706e --- /dev/null +++ b/gcc/testsuite/ada/acats/tests/c4/c460a01.a @@ -0,0 +1,408 @@ +-- C460A01.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 target type of a type conversion is a general +-- access type, Program_Error is raised if the accessibility level of +-- the operand type is deeper than that of the target type. Check for +-- cases where the type conversion occurs in an instance body, and +-- the operand type is passed as an actual during instantiation. +-- +-- TEST DESCRIPTION: +-- In order to satisfy accessibility requirements, the operand type must +-- be at the same or a less deep nesting level than the target type -- the +-- operand type must "live" as long as the target type. 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 checks for cases where the operand is a subprogram formal +-- parameter. +-- +-- The test declares three generic packages, each containing an access +-- type conversion in which the operand type is a formal type: +-- +-- (1) One in which the target type is declared within the +-- specification, and the conversion occurs within a nested +-- function. +-- +-- (2) One in which the target type is also a formal type, and +-- the conversion occurs within a nested function. +-- +-- (3) One in which the target type is declared outside the +-- generic, and the conversion occurs within a nested +-- procedure. +-- +-- The test verifies the following: +-- +-- For (1), Program_Error is not raised when the nested function is +-- called. Since the actual corresponding to the formal operand type +-- must always have the same or a less deep level than the target +-- type declared within the instance, the access type conversion is +-- always safe. +-- +-- For (2), Program_Error is raised when the nested function is +-- called if the operand type passed as an actual during instantiation +-- has an accessibility level deeper than that of the target type +-- passed as an actual, and that no exception is raised otherwise. +-- The exception is propagated to the innermost enclosing master. +-- +-- For (3), Program_Error is raised when the nested procedure is +-- called if the operand type passed as an actual during instantiation +-- has an accessibility level deeper than that of the target type. +-- The exception is handled within the nested procedure. +-- +-- TEST FILES: +-- The following files comprise this test: +-- +-- F460A00.A +-- => C460A01.A +-- +-- +-- CHANGE HISTORY: +-- 09 May 95 SAIC Initial prerelease version. +-- 24 Apr 96 SAIC Added code to avoid dead variable optimization. +-- 13 Feb 97 PWB.CTA Removed 'Class from qual expression at line 342. +--! + +generic + type Designated_Type is tagged private; + type Operand_Type is access Designated_Type; +package C460A01_0 is + type Target_Type is access all Designated_Type; + function Convert (P : Operand_Type) return Target_Type; +end C460A01_0; + + + --==================================================================-- + + +package body C460A01_0 is + function Convert (P : Operand_Type) return Target_Type is + begin + return Target_Type(P); -- Never fails. + end Convert; +end C460A01_0; + + + --==================================================================-- + + +generic + type Designated_Type is tagged private; + type Operand_Type is access all Designated_Type; + type Target_Type is access all Designated_Type; +package C460A01_1 is + function Convert (P : Operand_Type) return Target_Type; +end C460A01_1; + + + --==================================================================-- + + +package body C460A01_1 is + function Convert (P : Operand_Type) return Target_Type is + begin + return Target_Type(P); + end Convert; +end C460A01_1; + + + --==================================================================-- + + +with F460A00; +generic + type Designated_Type (<>) is new F460A00.Tagged_Type with private; + type Operand_Type is access Designated_Type; +package C460A01_2 is + procedure Proc (P : Operand_Type; + Res : out F460A00.TC_Result_Kind); +end C460A01_2; + + + --==================================================================-- + +with Report; +package body C460A01_2 is + procedure Proc (P : Operand_Type; + Res : out F460A00.TC_Result_Kind) is + Ptr : F460A00.AccTag_L0; + begin + Ptr := F460A00.AccTag_L0(P); + + -- Avoid optimization (dead variable removal of Ptr): + if not Report.Equal (Ptr.C, Ptr.C) then -- Always false. + Report.Failed ("Unexpected error in C460A01_2 instance"); + end if; + + Res := F460A00.OK; + exception + when Program_Error => Res := F460A00.PE_Exception; + when others => Res := F460A00.Others_Exception; + end Proc; +end C460A01_2; + + + --==================================================================-- + + +with F460A00; +with C460A01_0; +with C460A01_1; +with C460A01_2; + +with Report; +procedure C460A01 is +begin -- C460A01. -- [ Level = 1 ] + + Report.Test ("C460A01", "Run-time accessibility checks: instance " & + "bodies. Operand type of access type conversion is " & + "passed as actual to instance"); + + + SUBTEST1: + declare -- [ Level = 2 ] + type AccTag_L2 is access all F460A00.Tagged_Type; + Operand: AccTag_L2 := new F460A00.Tagged_Type; + + Result : F460A00.TC_Result_Kind := F460A00.UN_Init; + begin -- SUBTEST1. + + declare -- [ Level = 3 ] + -- The instantiation of C460A01_0 should NOT result in any + -- exceptions. + + package Pack_OK is new C460A01_0 (F460A00.Tagged_Type, AccTag_L2); + Target : Pack_OK.Target_Type; + begin + -- The accessibility level of Pack_OK.Target_Type will always be at + -- least as deep as the operand type passed as an actual. Thus, + -- a call to Pack_OK.Convert does not propagate an exception: + + Target := Pack_OK.Convert(Operand); + + -- Avoid optimization (dead variable removal of Target): + if not Report.Equal (Target.C, Target.C) then -- Always false. + Report.Failed ("Unexpected error in SUBTEST #1"); + end if; + + Result := F460A00.OK; -- Expected result. + exception + when Program_Error => Result := F460A00.PE_Exception; + when others => Result := F460A00.Others_Exception; + end; + + F460A00.TC_Check_Results (Result, F460A00.OK, "SUBTEST #1"); + + exception + when Program_Error => + Report.Failed ("SUBTEST #1: Program_Error incorrectly raised"); + when others => + Report.Failed ("SUBTEST #1: Unexpected exception raised"); + end SUBTEST1; + + + + SUBTEST2: + declare -- [ Level = 2 ] + type AccTag_L2 is access all F460A00.Tagged_Type; + Operand : AccTag_L2 := new F460A00.Tagged_Type; + + Result : F460A00.TC_Result_Kind := F460A00.UN_Init; + begin -- SUBTEST2. + + declare -- [ Level = 3 ] + + type AccTag_L3 is access all F460A00.Tagged_Type; + Target : AccTag_L3; + + -- The instantiation of C460A01_1 should NOT result in any + -- exceptions. + + package Pack_OK is new C460A01_1 + (Designated_Type => F460A00.Tagged_Type, + Operand_Type => AccTag_L2, + Target_Type => AccTag_L3); + begin + -- The accessibility level of the actual passed as the operand type + -- in Pack_OK is 2. The accessibility level of the actual passed as + -- the target type is 3. Therefore, the access type conversion in + -- Pack_OK.Convert does not raise an exception when the subprogram is + -- called. If an exception is (incorrectly) raised, it is propagated + -- to the innermost enclosing master: + + Target := Pack_OK.Convert(Operand); + + -- Avoid optimization (dead variable removal of Target): + if not Report.Equal (Target.C, Target.C) then -- Always false. + Report.Failed ("Unexpected error in SUBTEST #2"); + end if; + + Result := F460A00.OK; -- Expected result. + exception + when Program_Error => Result := F460A00.PE_Exception; + when others => Result := F460A00.Others_Exception; + end; + + F460A00.TC_Check_Results (Result, F460A00.OK, "SUBTEST #2"); + + exception + when Program_Error => + Report.Failed ("SUBTEST #2: Program_Error incorrectly raised"); + when others => + Report.Failed ("SUBTEST #2: Unexpected exception raised"); + end SUBTEST2; + + + + SUBTEST3: + declare -- [ Level = 2 ] + type AccTag_L2 is access all F460A00.Tagged_Type; + Target : AccTag_L2; + + Result : F460A00.TC_Result_Kind := F460A00.UN_Init; + begin -- SUBTEST3. + + declare -- [ Level = 3 ] + + type AccTag_L3 is access all F460A00.Tagged_Type; + Operand : AccTag_L3 := new F460A00.Tagged_Type; + + -- The instantiation of C460A01_1 should NOT result in any + -- exceptions. + + package Pack_PE is new C460A01_1 + (Designated_Type => F460A00.Tagged_Type, + Operand_Type => AccTag_L3, + Target_Type => AccTag_L2); + begin + -- The accessibility level of the actual passed as the operand type + -- in Pack_PE is 3. The accessibility level of the actual passed as + -- the target type is 2. Therefore, the access type conversion in + -- Pack_PE.Convert raises Program_Error when the subprogram is + -- called. The exception is propagated to the innermost enclosing + -- master: + + Target := Pack_PE.Convert(Operand); + + -- Avoid optimization (dead variable removal of Target): + if not Report.Equal (Target.C, Target.C) then -- Always false. + Report.Failed ("Unexpected error in SUBTEST #3"); + end if; + + Result := F460A00.OK; + exception + when Program_Error => Result := F460A00.PE_Exception; + -- Expected result. + when others => Result := F460A00.Others_Exception; + end; + + F460A00.TC_Check_Results (Result, F460A00.PE_Exception, "SUBTEST #3"); + + exception + when Program_Error => + Report.Failed ("SUBTEST #3: Program_Error incorrectly raised"); + when others => + Report.Failed ("SUBTEST #3: Unexpected exception raised"); + end SUBTEST3; + + + + SUBTEST4: + declare -- [ Level = 2 ] + Result : F460A00.TC_Result_Kind := F460A00.UN_Init; + begin -- SUBTEST4. + + declare -- [ Level = 3 ] + + TType : F460A00.Tagged_Type; + Operand : F460A00.AccTagClass_L0 + := new F460A00.Tagged_Type'(TType); + + -- The instantiation of C460A01_2 should NOT result in any + -- exceptions. + + package Pack_OK is new C460A01_2 (F460A00.Tagged_Type'Class, + F460A00.AccTagClass_L0); + begin + -- The accessibility level of the actual passed as the operand type + -- in Pack_OK is 0. The accessibility level of the target type + -- (F460A00.AccTag_L0) is also 0. Therefore, the access type + -- conversion in Pack_OK.Proc does not raise an exception when the + -- subprogram is called. If an exception is (incorrectly) raised, + -- it is handled within the subprogram: + + Pack_OK.Proc(Operand, Result); + end; + + F460A00.TC_Check_Results (Result, F460A00.OK, "SUBTEST #4"); + + exception + when Program_Error => + Report.Failed ("SUBTEST #4: Program_Error incorrectly raised"); + when others => + Report.Failed ("SUBTEST #4: Unexpected exception raised"); + end SUBTEST4; + + + + SUBTEST5: + declare -- [ Level = 2 ] + Result : F460A00.TC_Result_Kind := F460A00.UN_Init; + begin -- SUBTEST5. + + declare -- [ Level = 3 ] + + type AccDerTag_L3 is access all F460A00.Derived_Tagged_Type; + Operand : AccDerTag_L3 := new F460A00.Derived_Tagged_Type; + + -- The instantiation of C460A01_2 should NOT result in any + -- exceptions. + + package Pack_PE is new C460A01_2 (F460A00.Derived_Tagged_Type, + AccDerTag_L3); + begin + -- The accessibility level of the actual passed as the operand type + -- in Pack_PE is 3. The accessibility level of the target type + -- (F460A00.AccTag_L0) is 0. Therefore, the access type conversion + -- in Pack_PE.Proc raises Program_Error when the subprogram is + -- called. The exception is handled within the subprogram: + + Pack_PE.Proc(Operand, Result); + end; + + F460A00.TC_Check_Results (Result, F460A00.PE_Exception, "SUBTEST #5"); + + exception + when Program_Error => + Report.Failed ("SUBTEST #5: Program_Error incorrectly raised"); + when others => + Report.Failed ("SUBTEST #5: Unexpected exception raised"); + end SUBTEST5; + + Report.Result; + +end C460A01; |