How could I name it ?

[Fran�oise & Herv� BITTEUR <hbitteur@club-internet.fr>]

Please, how could I name the item 'Ptr', belonging to task body 'T' in
the following entry point. I cannot name it simply 'Ptr' since the entry
point already has a 'Ptr' as parameter.

The various constructions, all flagged hereunder with comment "Not OK",
lead to the GNAT compilation message :
	invalid prefix in selected component "T"

How come ? 
Besides, this is a simplified old piece of code (Ada 83) that used to
compile correctly on VaxAda.

Thanks for any clue.
--Herv� BITTEUR

---- cut here -------------------------------------------------------
procedure Test is
   type T;
   type T_Ptr is access T;
   task type T is
      entry Point (Ptr : in T_Ptr);
   end T;
   task body T is
      Ptr : T_Ptr;
      My_Ptr : T_Ptr;
   begin
      accept Point
        (Ptr : in T_Ptr)
      do
         --Ptr := Ptr;                    -- not OK, of course
         My_Ptr := Ptr;                 -- OK, but I don't like it !

         T.Ptr := Ptr;                  -- not OK
         T.My_Ptr := Ptr;               -- not OK

         Test.T.Ptr := Ptr;             -- not OK
         Test.T.My_Ptr := Ptr;          -- not OK
      end Point;
   end T;
begin
   null;
end Test;
--  gnatmake -g test.adb
--  gcc -c -g test.adb
--  test.adb:17:10: invalid prefix in selected component "T"
--  test.adb:18:10: invalid prefix in selected component "T"
--  test.adb:20:14: invalid prefix in selected component "T"
--  test.adb:21:14: invalid prefix in selected component "T"
--  gnatmake: "test.adb" compilation error
----- end of example --------------------------------------------------