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--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

-- S Y S T E M . A D D R E S S _ T O _ A C C E S S _ C O N V E R S I O N S  --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --

--                                                                          --

-- This specification is derived from the Ada Reference Manual for use with --

-- GNAT. The copyright notice above, and the license provisions that follow --

-- apply solely to the  contents of the part following the private keyword. --

--                                                                          --

-- GNAT is free software;  you can  redistribute it  and/or modify it under --

-- terms of the  GNU General Public License as published  by the Free Soft- --

-- ware  Foundation;  either version 3,  or (at your option) any later ver- --

-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --

-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --

-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

------------------------------------------------------------------------------

generic

   type Object (<>) is limited private;

package System.Address_To_Access_Conversions is

   pragma Preelaborate;

   pragma Elaborate_Body;

   --  This pragma Elaborate_Body is there to ensure the requirement of what is

   --  at the moment a dummy null body. The reason this null body is there is

   --  that we used to have a real body, and it causes bootstrap problems with

   --  old compilers if we try to remove the corresponding file.

   pragma Compile_Time_Warning

     (Object'Unconstrained_Array,

      "Object is unconstrained array type" & ASCII.LF &

      "To_Pointer results may not have bounds");

   --  Capture constrained status, suppressing warnings, since this is

   --  an obsolescent feature to use Constrained in this way (RM J.4).

   pragma Warnings (Off);

   Xyz : Boolean := Object'Constrained;

   pragma Warnings (On);

   type Object_Pointer is access all Object;

   for Object_Pointer'Size use Standard'Address_Size;

   pragma No_Strict_Aliasing (Object_Pointer);

   --  Strictly speaking, this routine should not be used to generate pointers

   --  to other than proper values of the proper type, but in practice, this

   --  is done all the time. This pragma stops the compiler from doing some

   --  optimizations that may cause unexpected results based on the assumption

   --  of no strict aliasing.

   function To_Pointer (Value : Address)        return Object_Pointer;

   function To_Address (Value : Object_Pointer) return Address;

   pragma Import (Intrinsic, To_Pointer);

   pragma Import (Intrinsic, To_Address);

end System.Address_To_Access_Conversions;