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--- C460005.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 a view conversion of a tagged type that is the left
--- side of an assignment statement, the assignment assigns to the
--- corresponding part of the object denoted by the operand.
---
--- 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.
---
--- For the cases where the view conversion is the left side of an
--- assignment statement, and Constraint_Error should not be raised,
--- an additional check is made that only the corresponding portion
--- of the operand is updated by the assignment. For example:
---
--- type T is tagged record
--- C1 : Integer := 0;
--- end record;
---
--- type DT is new T with record
--- C2 : Integer := 0;
--- end record;
---
--- A : T := (C1 => 5);
--- B : DT := (C1 => 0, C2 => 10);
--- CWDT : T'Class := B;
---
--- T(CWDT) := A; -- Updates component C1; C2 remains unchanged.
--- -- Value of CWDT is (C1 => 5, C2 => 10).
---
---
--- CHANGE HISTORY:
--- 31 Jul 95 SAIC Initial prerelease version.
--- 22 Apr 96 SAIC ACVC 2.1: Added a check for correct tag.
--- 08 Sep 96 SAIC ACVC 2.1: Modified Report.Test.
---
---!
-
-package C460005_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);
-
-end C460005_0;
-
-
- --==================================================================--
-
-
-package body C460005_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;
-
-end C460005_0;
-
-
- --==================================================================--
-
-
-with C460005_0;
-use C460005_0;
-
-with Report;
-procedure C460005 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");
-
- Tag_Type_Res : constant Tag_Type := (C1 => 25);
- DTag_Type_Res : constant DTag_Type := (Tag_Type_Res with "Hello");
- DDTag_Type_Res : constant DDTag_Type := (DTag_Type_Res with "World");
-
-begin
-
- Report.Test ("C460005", "Check that, for a view conversion of a tagged " &
- "type that is the left side of an assignment statement, " &
- "the assignment assigns to the corresponding part of the " &
- "object denoted by the operand");
-
-
- declare
- procedure CW_Proc (P : Tag_Type'Class) is
- Operand : Tag_Type'Class := P;
- begin
- Tag_Type(Operand) := Tag_Type_Value;
-
- if (Operand /= Tag_Type'Class (Tag_Type_Value)) then
- Report.Failed ("Operand 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 (Tag_Type_Init);
- end;
-
- ----------------------------------------------------------------------
-
- declare
- procedure CW_Proc (P : Tag_Type'Class) is
- Operand : Tag_Type'Class := P;
- begin
- DTag_Type(Operand) := DTag_Type_Value;
- Report.Failed ("Constraint_Error not raised: #02");
-
- exception
- when Constraint_Error => null; -- expected exception
- when others => Report.Failed ("Unexpected exception: #02");
- 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
- DDTag_Type(Operand) := DDTag_Type_Value;
- Report.Failed ("Constraint_Error not raised: #03");
-
- exception
- when Constraint_Error => null; -- expected exception
- when others => Report.Failed ("Unexpected exception: #03");
- 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
- Tag_Type(Operand) := Tag_Type_Value;
-
- if Operand not in DTag_Type then
- Report.Failed ("Operand has wrong tag: #04");
- elsif (Operand /= Tag_Type'Class (DTag_Type_Res))
- then -- Check to make
- Report.Failed ("Operand has wrong value: #04"); -- sure that C2 was
- end if; -- not modified.
-
- exception
- when Constraint_Error =>
- Report.Failed ("Constraint_Error raised: #04");
- when others =>
- Report.Failed ("Unexpected exception: #04");
- 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
- Tag_Type(Operand) := Tag_Type_Value;
-
- if Operand not in DDTag_Type then
- Report.Failed ("Operand has wrong tag: #05");
- elsif (Operand /= Tag_Type'Class (DDTag_Type_Res))
- then -- Check to make
- Report.Failed ("Operand has wrong value: #05"); -- sure that C2, C3
- end if; -- were not changed.
-
- 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_Init);
- end;
-
- Report.Result;
-
-end C460005;
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