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1 149 jeremybenn
-- C460005.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      Check that, for a view conversion of a tagged type that is the left
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--      side of an assignment statement, the assignment assigns to the
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--      corresponding part of the object denoted by the operand.
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--
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-- TEST DESCRIPTION:
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--      View conversions of class-wide operands to specific types are
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--      placed on the right and left sides of assignment statements, and
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--      conversions of class-wide operands to class-wide types are used
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--      as actual parameters to dispatching operations. In all cases, a
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--      check is made that Constraint_Error is raised if the tag of the
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--      operand does not identify a specific type covered by or descended
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--      from the target type, and not raised otherwise.
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--
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--      For the cases where the view conversion is the left side of an
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--      assignment statement, and Constraint_Error should not be raised,
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--      an additional check is made that only the corresponding portion
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--      of the operand is updated by the assignment. For example:
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--
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--         type T is tagged record
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--            C1 : Integer := 0;
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--         end record;
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--
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--         type DT is new T with record
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--            C2 : Integer := 0;
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--         end record;
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--
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--         A    : T       := (C1 => 5);
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--         B    : DT      := (C1 => 0, C2 => 10);
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--         CWDT : T'Class := B;
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--
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--         T(CWDT) := A;  -- Updates component C1; C2 remains unchanged.
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--                        -- Value of CWDT is (C1 => 5, C2 => 10).
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--
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--
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-- CHANGE HISTORY:
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--      31 Jul 95   SAIC    Initial prerelease version.
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--      22 Apr 96   SAIC    ACVC 2.1: Added a check for correct tag.
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--      08 Sep 96   SAIC    ACVC 2.1: Modified Report.Test.
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--
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--!
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package C460005_0 is
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   type Tag_Type is tagged record
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      C1 : Natural;
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   end record;
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   procedure Proc (X : in out Tag_Type);
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   type DTag_Type is new Tag_Type with record
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      C2 : String (1 .. 5);
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   end record;
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   procedure Proc (X : in out DTag_Type);
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   type DDTag_Type is new DTag_Type with record
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      C3 : String (1 .. 5);
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   end record;
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   procedure Proc (X : in out DDTag_Type);
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end C460005_0;
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     --==================================================================--
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package body C460005_0 is
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   procedure Proc (X : in out Tag_Type) is
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   begin
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      X.C1 := 25;
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   end Proc;
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   -----------------------------------------
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   procedure Proc (X : in out DTag_Type) is
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   begin
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      Proc ( Tag_Type(X) );
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      X.C2 := "Earth";
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   end Proc;
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   -----------------------------------------
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   procedure Proc (X : in out DDTag_Type) is
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   begin
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      Proc ( DTag_Type(X) );
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      X.C3 := "Orbit";
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   end Proc;
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end C460005_0;
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     --==================================================================--
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with C460005_0;
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use  C460005_0;
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with Report;
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procedure C460005 is
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   Tag_Type_Init    :  constant Tag_Type   := (C1 => 0);
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   DTag_Type_Init   :  constant DTag_Type  := (Tag_Type_Init with "Hello");
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   DDTag_Type_Init  :  constant DDTag_Type := (DTag_Type_Init with "World");
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   Tag_Type_Value   :  constant Tag_Type   := (C1 => 25);
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   DTag_Type_Value  :  constant DTag_Type  := (Tag_Type_Value  with "Earth");
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   DDTag_Type_Value :  constant DDTag_Type := (DTag_Type_Value with "Orbit");
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   Tag_Type_Res     :  constant Tag_Type   := (C1 => 25);
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   DTag_Type_Res    :  constant DTag_Type  := (Tag_Type_Res  with "Hello");
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   DDTag_Type_Res   :  constant DDTag_Type := (DTag_Type_Res with "World");
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begin
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   Report.Test ("C460005", "Check that, for a view conversion of a tagged " &
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                "type that is the left side of an assignment statement, "   &
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                "the assignment assigns to the corresponding part of the "  &
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                "object denoted by the operand");
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   declare
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      procedure CW_Proc (P : Tag_Type'Class) is
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         Operand : Tag_Type'Class := P;
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      begin
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         Tag_Type(Operand) := Tag_Type_Value;
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         if (Operand /= Tag_Type'Class (Tag_Type_Value)) then
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            Report.Failed ("Operand has wrong value: #01");
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         end if;
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      exception
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         when Constraint_Error =>
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            Report.Failed ("Constraint_Error raised: #01");
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         when others           =>
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            Report.Failed ("Unexpected exception: #01");
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      end CW_Proc;
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   begin
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      CW_Proc (Tag_Type_Init);
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   end;
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   ----------------------------------------------------------------------
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   declare
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      procedure CW_Proc (P : Tag_Type'Class) is
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         Operand : Tag_Type'Class := P;
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      begin
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         DTag_Type(Operand) := DTag_Type_Value;
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         Report.Failed ("Constraint_Error not raised: #02");
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      exception
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         when Constraint_Error => null;              -- expected exception
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         when others           => Report.Failed ("Unexpected exception: #02");
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      end CW_Proc;
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   begin
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      CW_Proc (Tag_Type_Init);
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   end;
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   ----------------------------------------------------------------------
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   declare
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      procedure CW_Proc (P : Tag_Type'Class) is
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         Operand : Tag_Type'Class := P;
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      begin
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         DDTag_Type(Operand) := DDTag_Type_Value;
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         Report.Failed ("Constraint_Error not raised: #03");
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      exception
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         when Constraint_Error => null;              -- expected exception
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         when others           => Report.Failed ("Unexpected exception: #03");
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      end CW_Proc;
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   begin
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      CW_Proc (Tag_Type_Init);
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   end;
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   ----------------------------------------------------------------------
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   declare
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      procedure CW_Proc (P : Tag_Type'Class) is
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         Operand : Tag_Type'Class := P;
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      begin
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         Tag_Type(Operand) := Tag_Type_Value;
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         if Operand not in DTag_Type then
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            Report.Failed ("Operand has wrong tag: #04");
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         elsif (Operand /= Tag_Type'Class (DTag_Type_Res))
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         then                                              -- Check to make
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           Report.Failed ("Operand has wrong value: #04"); -- sure that C2 was
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         end if;                                           -- not modified.
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      exception
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         when Constraint_Error =>
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            Report.Failed ("Constraint_Error raised: #04");
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         when others           =>
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            Report.Failed ("Unexpected exception: #04");
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      end CW_Proc;
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   begin
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      CW_Proc (DTag_Type_Init);
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   end;
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   ----------------------------------------------------------------------
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   declare
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      procedure CW_Proc (P : Tag_Type'Class) is
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         Operand : Tag_Type'Class := P;
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      begin
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         Tag_Type(Operand) := Tag_Type_Value;
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         if Operand not in DDTag_Type then
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            Report.Failed ("Operand has wrong tag: #05");
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         elsif (Operand /= Tag_Type'Class (DDTag_Type_Res))
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         then                                              -- Check to make
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           Report.Failed ("Operand has wrong value: #05"); -- sure that C2, C3
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         end if;                                           -- were not changed.
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      exception
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         when Constraint_Error =>
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            Report.Failed ("Constraint_Error raised: #05");
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         when others           =>
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            Report.Failed ("Unexpected exception: #05");
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      end CW_Proc;
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   begin
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      CW_Proc (DDTag_Type_Init);
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   end;
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   Report.Result;
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end C460005;

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