-- --
-- S p e c --
-- --
--- Copyright (C) 2002-2004 Free Software Foundation, Inc. --
+-- Copyright (C) 2002-2009, 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 --
-- --
-- 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 2, or (at your option) any later ver- --
+-- 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
+-- 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. --
-- extra declarations that can be introduced into System using Extend_System.
-- It is a good idea to avoid use clauses for this package!
+pragma Compiler_Unit;
+
package System.Storage_Elements is
-pragma Pure (Storage_Elements);
--- Note that we take advantage of the implementation permission to make
--- this unit Pure instead of Preelaborable; see RM 13.7.1(15).
+ pragma Pure;
+ -- Note that we take advantage of the implementation permission to make
+ -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada 2005,
+ -- this is Pure in any case (AI-362).
--- We also add the pragma Pure_Function to the operations in this package,
--- because otherwise functions with parameters derived from Address are
--- treated as non-pure by the back-end (see exp_ch6.adb). This is because
--- in many cases such a parameter is used to hide read/out access to objects,
--- and it would be unsafe to treat such functions as pure.
+ -- We also add the pragma Pure_Function to the operations in this package,
+ -- because otherwise functions with parameters derived from Address are
+ -- treated as non-pure by the back-end (see exp_ch6.adb). This is because
+ -- in many cases such a parameter is used to hide read/out access to
+ -- objects, and it would be unsafe to treat such functions as pure.
type Storage_Offset is range
-(2 ** (Integer'(Standard'Address_Size) - 1)) ..
+(2 ** (Integer'(Standard'Address_Size) - 1)) - Long_Long_Integer'(1);
+ -- Note: the reason for the Long_Long_Integer qualification here is to
+ -- avoid a bogus ambiguity when this unit is analyzed in an rtsfind
+ -- context. It may be possible to remove this in the future, but it is
+ -- certainly harmless in any case ???
subtype Storage_Count is Storage_Offset range 0 .. Storage_Offset'Last;
type Storage_Element is mod 2 ** Storage_Unit;
for Storage_Element'Size use Storage_Unit;
+ pragma Universal_Aliasing (Storage_Element);
+ -- This type is used by the expander to implement aggregate copy
+
type Storage_Array is
array (Storage_Offset range <>) of aliased Storage_Element;
for Storage_Array'Component_Size use Storage_Unit;
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