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Diffstat (limited to 'gcc-4.9/gcc/testsuite/ada/acats/tests/cc/cc54004.a')
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diff --git a/gcc-4.9/gcc/testsuite/ada/acats/tests/cc/cc54004.a b/gcc-4.9/gcc/testsuite/ada/acats/tests/cc/cc54004.a new file mode 100644 index 000000000..0023b3a74 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/ada/acats/tests/cc/cc54004.a @@ -0,0 +1,295 @@ +-- CC54004.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 the designated type of a generic formal pool-specific +-- access type may be class-wide. Check that calls to primitive +-- subprograms in the instance dispatch to the appropriate bodies when +-- the controlling operand is a dereference of an object of the access- +-- to-class-wide type. +-- +-- TEST DESCRIPTION: +-- A hierarchy of types is declared in two packages. The root type of +-- the class is declared as abstract in a separate package. It possesses +-- an abstract primitive subprogram Handle. A concrete type extends the +-- root type in a second package with a component of an enumeration type. +-- A second type extends this extension in the same package. Both +-- derivatives override the root type's primitive subprogram with a +-- non-abstract subprogram. +-- +-- The generic implements a heterogeneous stack of access-to-class-wide +-- objects in the root type's class. A subprogram declared in the +-- generic calls Handle using dereferences of each of the class-wide +-- objects on the stack as operand. Each call to Handle should dispatch +-- to the appropriate body based on the tag of the operand. The +-- overriding versions of Handle each set the component of the type to +-- a different value. The value of the component is checked to verify +-- that the calls dispatched correctly. +-- +-- +-- CHANGE HISTORY: +-- 06 Dec 94 SAIC ACVC 2.0 +-- 10 Apr 96 SAIC ACVC 2.1: Added pragma Elaborate to context clause +-- preceding CC54004_3. +-- +--! + +package CC54004_0 is + + -- The types and operations defined here are artificial. The component + -- TC_Code is the only component required for testing purposes. + + type TC_Code_Type is (None, Low, Medium); + + type Alert is abstract tagged record -- Abstract type. + TC_Code : TC_Code_Type; -- Testing flag. + end record; + + procedure Handle (A : in out Alert); -- Non-abstract primitive + -- subprogram. + -- ...Other operations. + + type Alert_Ptr is access Alert'Class; -- Access-to-class-wide + -- type. +end CC54004_0; + + + --===================================================================-- + + +package body CC54004_0 is + + procedure Handle (A : in out Alert) is + begin + A.TC_Code := None; + end Handle; + +end CC54004_0; + + + --===================================================================-- + + +with CC54004_0; +use CC54004_0; +package CC54004_1 is + + type Low_Alert is new CC54004_0.Alert with record + C1 : String (1 .. 5) := "Dummy"; + -- ...Other components. + end record; + + procedure Handle (A : in out Low_Alert); -- Overrides parent's + -- operations. + --...Other operations. + + + type Medium_Alert is new Low_Alert with record + C : Integer := 6; + -- ...Other components. + end record; + + procedure Handle (A : in out Medium_Alert); -- Overrides parent's + -- operations. + --...Other operations. + +end CC54004_1; + + + --===================================================================-- + +package body CC54004_1 is + + procedure Handle (A : in out Low_Alert) is + begin + A.TC_Code := Low; + end Handle; + + procedure Handle (A : in out Medium_Alert) is + begin + A.TC_Code := Medium; + end Handle; + +end CC54004_1; + + + --===================================================================-- + + +with CC54004_0; +generic + type Element_Type is abstract new CC54004_0.Alert with private; + type Element_Ptr is access Element_Type'Class; +package CC54004_2 is + + type Stack_Type is private; + + procedure Push (Stack : in out Stack_Type; + Elem_Ptr : in Element_Ptr); + + procedure Pop (Stack : in out Stack_Type; + Elem_Ptr : out Element_Ptr); + + procedure Process_Stack (Stack : in out Stack_Type); + + -- ... Other operations. + +private + + subtype Index is Positive range 1 .. 5; + type Stack_Type is array (Index) of Element_Ptr; + + Top : Index := 1; + +end CC54004_2; + + + --===================================================================-- + + +package body CC54004_2 is + + procedure Push (Stack : in out Stack_Type; + Elem_Ptr : in Element_Ptr) is + begin + Stack(Top) := Elem_Ptr; + Top := Top + 1; -- Artificial: no Constraint_Error protection. + end Push; + + + procedure Pop (Stack : in out Stack_Type; + Elem_Ptr : out Element_Ptr)is + begin + Top := Top - 1; -- Artificial: no Constraint_Error protection. + Elem_Ptr := Stack(Top); + end Pop; + + + -- Call Handle for each element on the stack. Since the dereferenced access + -- object is of a class-wide type, all calls to Handle are dispatching. The + -- version of Handle called will be that declared for the type + -- corresponding to the tag of the operand. + + procedure Process_Stack (Stack : in out Stack_Type) is + begin -- Artificial: no Constraint_Error protection. + for I in reverse Index'First .. (Top - 1) loop + Handle (Stack(I).all); -- Call dispatches based on + end loop; -- tag of operand. + end Process_Stack; + +end CC54004_2; + + + --===================================================================-- + + +with CC54004_0; +with CC54004_1; +with CC54004_2; +pragma Elaborate (CC54004_2); + +package CC54004_3 is + + package Alert_Stacks is new CC54004_2 (Element_Type => CC54004_0.Alert, + Element_Ptr => CC54004_0.Alert_Ptr); + + -- All overriding versions of Handle visible at the point of instantiation. + + Alert_List : Alert_Stacks.Stack_Type; + + procedure TC_Create_Alert_Stack; + +end CC54004_3; + + + --===================================================================-- + + +package body CC54004_3 is + + procedure TC_Create_Alert_Stack is + begin + Alert_Stacks.Push (Alert_List, new CC54004_1.Low_Alert); + Alert_Stacks.Push (Alert_List, new CC54004_1.Medium_Alert); + end TC_Create_Alert_Stack; + +end CC54004_3; + + + --===================================================================-- + + +with CC54004_0; +with CC54004_1; +with CC54004_3; + +with Report; +procedure CC54004 is + TC_Low_Ptr, TC_Med_Ptr : CC54004_0.Alert_Ptr; + TC_Low_Actual : CC54004_1.Low_Alert; + TC_Med_Actual : CC54004_1.Medium_Alert; + + use type CC54004_0.TC_Code_Type; +begin + Report.Test ("CC54004", "Check that the designated type of a generic " & + "formal pool-specific access type may be class-wide"); + + + -- Create stack of elements: + + CC54004_3.TC_Create_Alert_Stack; + + + -- Commence dispatching operations on stack elements: + + CC54004_3.Alert_Stacks.Process_Stack (CC54004_3.Alert_List); + + + -- Pop "handled" alerts off stack: + + CC54004_3.Alert_Stacks.Pop (CC54004_3.Alert_List, TC_Med_Ptr); + CC54004_3.Alert_Stacks.Pop (CC54004_3.Alert_List, TC_Low_Ptr); + + + -- Verify results: + + if TC_Low_Ptr.all not in CC54004_1.Low_Alert or else + TC_Med_Ptr.all not in CC54004_1.Medium_Alert + then + Report.Failed ("Class-wide objects do not have expected tags"); + + -- The explicit dereference of the "Pop"ed pointers results in views of + -- the designated objects, the nominal subtypes of which are class-wide. + -- In order to be able to reference the component TC_Code, these views + -- must be converted to a specific type possessing that component. + + elsif CC54004_1.Low_Alert(TC_Low_Ptr.all).TC_Code /= CC54004_0.Low or + CC54004_1.Medium_Alert(TC_Med_Ptr.all).TC_Code /= CC54004_0.Medium + then + Report.Failed ("Calls did not dispatch to expected operations"); + end if; + + Report.Result; +end CC54004; |