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--- 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;
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