gcc/ada/s-finroo.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                S Y S T E M . F I N A L I Z A T I O N _ R O O T           --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --           Copyright (C) 1992-2005 Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 package body System.Finalization_Root is
  35
  36    --  It should not be possible to call any of these subprograms
  37
  38    ------------
  39    -- Adjust --
  40    ------------
  41
  42    procedure Adjust (Object : in out Root_Controlled) is
  43    begin
  44       raise Program_Error;
  45    end Adjust;
  46
  47    --------------
  48    -- Finalize --
  49    --------------
  50
  51    procedure Finalize (Object : in out Root_Controlled) is
  52    begin
  53       raise Program_Error;
  54    end Finalize;
  55
  56    ----------------
  57    -- Initialize --
  58    ----------------
  59
  60    procedure Initialize (Object : in out Root_Controlled) is
  61    begin
  62       raise Program_Error;
  63    end Initialize;
  64
  65    ----------
  66    -- Read --
  67    ----------
  68
  69    --  Read and Write must be empty in order to avoid copying the
  70    --  finalization pointers.
  71
  72    pragma Warnings (Off);
  73    --  Suppress warning for out paramater Item which is not assigned
  74    --  because it is pretty much empty.
  75
  76    procedure Read
  77      (Stream : not null access Ada.Streams.Root_Stream_Type'Class;
  78       Item   : out Root_Controlled)
  79    is
  80    begin
  81       null;
  82    end Read;
  83
  84    -----------
  85    -- Write --
  86    -----------
  87
  88    --  Read and Write must be empty in order to avoid copying the
  89    --  finalization pointers.
  90
  91    procedure Write
  92      (Stream : not null access Ada.Streams.Root_Stream_Type'Class;
  93       Item   : in Root_Controlled)
  94    is
  95    begin
  96       null;
  97    end Write;
  98
  99 end System.Finalization_Root;