| -- C460004.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 operand type of a type conversion is class-wide, |
| -- Constraint_Error is raised if the tag of the operand does not |
| -- identify a specific type that is covered by or descended from the |
| -- target type. |
| -- |
| -- TEST DESCRIPTION: |
| -- View conversions of class-wide operands to specific types are |
| -- placed on the right and left sides of assignment statements, and |
| -- conversions of class-wide operands to class-wide types are used |
| -- as actual parameters to dispatching operations. In all cases, a |
| -- check is made that Constraint_Error is raised if the tag of the |
| -- operand does not identify a specific type covered by or descended |
| -- from the target type, and not raised otherwise. |
| -- |
| -- A specific type is descended from itself and from those types it is |
| -- directly or indirectly derived from. A specific type is covered by |
| -- itself and each class-wide type to whose class it belongs. |
| -- |
| -- A class-wide type T'Class is descended from T and those types which |
| -- T is descended from. A class-wide type is covered by each class-wide |
| -- type to whose class it belongs. |
| -- |
| -- |
| -- CHANGE HISTORY: |
| -- 19 Jul 95 SAIC Initial prerelease version. |
| -- 18 Apr 96 SAIC ACVC 2.1: Added a check for correct tag. |
| -- |
| --! |
| package C460004_0 is |
| |
| type Tag_Type is tagged record |
| C1 : Natural; |
| end record; |
| |
| procedure Proc (X : in out Tag_Type); |
| |
| |
| type DTag_Type is new Tag_Type with record |
| C2 : String (1 .. 5); |
| end record; |
| |
| procedure Proc (X : in out DTag_Type); |
| |
| |
| type DDTag_Type is new DTag_Type with record |
| C3 : String (1 .. 5); |
| end record; |
| |
| procedure Proc (X : in out DDTag_Type); |
| |
| procedure NewProc (X : in DDTag_Type); |
| |
| function CWFunc (X : Tag_Type'Class) return Tag_Type'Class; |
| |
| end C460004_0; |
| |
| |
| --==================================================================-- |
| |
| with Report; |
| package body C460004_0 is |
| |
| procedure Proc (X : in out Tag_Type) is |
| begin |
| X.C1 := 25; |
| end Proc; |
| |
| ----------------------------------------- |
| procedure Proc (X : in out DTag_Type) is |
| begin |
| Proc ( Tag_Type(X) ); |
| X.C2 := "Earth"; |
| end Proc; |
| |
| ----------------------------------------- |
| procedure Proc (X : in out DDTag_Type) is |
| begin |
| Proc ( DTag_Type(X) ); |
| X.C3 := "Orbit"; |
| end Proc; |
| |
| ----------------------------------------- |
| procedure NewProc (X : in DDTag_Type) is |
| Y : DDTag_Type := X; |
| begin |
| Proc (Y); |
| exception |
| when others => |
| Report.Failed ("Unexpected exception in NewProc"); |
| end NewProc; |
| |
| ----------------------------------------- |
| function CWFunc (X : Tag_Type'Class) return Tag_Type'Class is |
| Y : Tag_Type'Class := X; |
| begin |
| Proc (Y); |
| return Y; |
| end CWFunc; |
| |
| end C460004_0; |
| |
| |
| --==================================================================-- |
| |
| |
| with C460004_0; |
| use C460004_0; |
| |
| with Report; |
| procedure C460004 is |
| |
| Tag_Type_Init : constant Tag_Type := (C1 => 0); |
| DTag_Type_Init : constant DTag_Type := (Tag_Type_Init with "Hello"); |
| DDTag_Type_Init : constant DDTag_Type := (DTag_Type_Init with "World"); |
| |
| Tag_Type_Value : constant Tag_Type := (C1 => 25); |
| DTag_Type_Value : constant DTag_Type := (Tag_Type_Value with "Earth"); |
| DDTag_Type_Value : constant DDTag_Type := (DTag_Type_Value with "Orbit"); |
| |
| begin |
| |
| Report.Test ("C460004", "Check that for a view conversion of a " & |
| "class-wide operand, Constraint_Error is raised if the " & |
| "tag of the operand does not identify a specific type " & |
| "covered by or descended from the target type"); |
| |
| -- |
| -- View conversion to specific type: |
| -- |
| |
| declare |
| procedure CW_Proc (P : Tag_Type'Class) is |
| Target : Tag_Type := Tag_Type_Init; |
| begin |
| Target := Tag_Type(P); |
| if (Target /= Tag_Type_Value) then |
| Report.Failed ("Target has wrong value: #01"); |
| end if; |
| exception |
| when Constraint_Error => |
| Report.Failed ("Constraint_Error raised: #01"); |
| when others => |
| Report.Failed ("Unexpected exception: #01"); |
| end CW_Proc; |
| |
| begin |
| CW_Proc (DDTag_Type_Value); |
| end; |
| |
| ---------------------------------------------------------------------- |
| |
| declare |
| Target : DTag_Type := DTag_Type_Init; |
| begin |
| Target := DTag_Type(CWFunc(DDTag_Type_Value)); |
| if (Target /= DTag_Type_Value) then |
| Report.Failed ("Target has wrong value: #02"); |
| end if; |
| exception |
| when Constraint_Error => Report.Failed ("Constraint_Error raised: #02"); |
| when others => Report.Failed ("Unexpected exception: #02"); |
| end; |
| |
| ---------------------------------------------------------------------- |
| |
| declare |
| Target : DDTag_Type; |
| begin |
| Target := DDTag_Type(CWFunc(Tag_Type_Value)); |
| -- CWFunc returns a Tag_Type; its tag is preserved through |
| -- the view conversion. Constraint_Error should be raised. |
| |
| Report.Failed ("Constraint_Error not raised: #03"); |
| |
| exception |
| when Constraint_Error => null; -- expected exception |
| when others => Report.Failed ("Unexpected exception: #03"); |
| end; |
| |
| ---------------------------------------------------------------------- |
| |
| declare |
| procedure CW_Proc (P : Tag_Type'Class) is |
| begin |
| NewProc (DDTag_Type(P)); |
| Report.Failed ("Constraint_Error not raised: #04"); |
| |
| exception |
| when Constraint_Error => null; -- expected exception |
| when others => Report.Failed ("Unexpected exception: #04"); |
| end CW_Proc; |
| |
| begin |
| CW_Proc (DTag_Type_Value); |
| end; |
| |
| ---------------------------------------------------------------------- |
| |
| declare |
| procedure CW_Proc (P : Tag_Type'Class) is |
| Target : DDTag_Type := DDTag_Type_Init; |
| begin |
| Target := DDTag_Type(P); |
| if (Target /= DDTag_Type_Value) then |
| Report.Failed ("Target has wrong value: #05"); |
| end if; |
| |
| exception |
| when Constraint_Error => |
| Report.Failed ("Constraint_Error raised: #05"); |
| when others |
| => Report.Failed ("Unexpected exception: #05"); |
| end CW_Proc; |
| |
| begin |
| CW_Proc (DDTag_Type_Value); |
| end; |
| |
| |
| -- |
| -- View conversion to class-wide type: |
| -- |
| |
| declare |
| procedure CW_Proc (P : Tag_Type'Class) is |
| Operand : Tag_Type'Class := P; |
| begin |
| Proc( DTag_Type'Class(Operand) ); |
| Report.Failed ("Constraint_Error not raised: #06"); |
| |
| exception |
| when Constraint_Error => null; -- expected exception |
| when others => Report.Failed ("Unexpected exception: #06"); |
| end CW_Proc; |
| |
| begin |
| CW_Proc (Tag_Type_Init); |
| end; |
| |
| ---------------------------------------------------------------------- |
| |
| declare |
| procedure CW_Proc (P : Tag_Type'Class) is |
| Operand : Tag_Type'Class := P; |
| begin |
| Proc( DDTag_Type'Class(Operand) ); |
| Report.Failed ("Constraint_Error not raised: #07"); |
| |
| exception |
| when Constraint_Error => null; -- expected exception |
| when others => Report.Failed ("Unexpected exception: #07"); |
| end CW_Proc; |
| |
| begin |
| CW_Proc (Tag_Type_Init); |
| end; |
| |
| ---------------------------------------------------------------------- |
| |
| declare |
| procedure CW_Proc (P : Tag_Type'Class) is |
| Operand : Tag_Type'Class := P; |
| begin |
| Proc( DTag_Type'Class(Operand) ); |
| if Operand not in DTag_Type then |
| Report.Failed ("Operand has wrong tag: #08"); |
| elsif (Operand /= Tag_Type'Class (DTag_Type_Value)) then |
| Report.Failed ("Operand has wrong value: #08"); |
| end if; |
| |
| exception |
| when Constraint_Error => |
| Report.Failed ("Constraint_Error raised: #08"); |
| when others => |
| Report.Failed ("Unexpected exception: #08"); |
| end CW_Proc; |
| |
| begin |
| CW_Proc (DTag_Type_Init); |
| end; |
| |
| ---------------------------------------------------------------------- |
| |
| declare |
| procedure CW_Proc (P : Tag_Type'Class) is |
| Operand : Tag_Type'Class := P; |
| begin |
| Proc( Tag_Type'Class(Operand) ); |
| if Operand not in DDTag_Type then |
| Report.Failed ("Operand has wrong tag: #09"); |
| elsif (Operand /= Tag_Type'Class (DDTag_Type_Value)) then |
| Report.Failed ("Operand has wrong value: #09"); |
| end if; |
| |
| exception |
| when Constraint_Error => |
| Report.Failed ("Constraint_Error raised: #09"); |
| when others => |
| Report.Failed ("Unexpected exception: #09"); |
| end CW_Proc; |
| |
| begin |
| CW_Proc (DDTag_Type_Init); |
| end; |
| |
| |
| Report.Result; |
| |
| end C460004; |
