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-------------------------------------------------------------------------------
--
-- <STRONG>Copyright (c) 2001, 2002 by Thomas Wolf.</STRONG>
-- <BLOCKQUOTE>
-- AdaBrowse is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2, or (at your option) any
-- later version. AdaBrowse is distributed in the hope that it will be
-- useful, but <EM>without any warranty</EM>; without even the implied
-- warranty of <EM>merchantability or fitness for a particular purpose.</EM>
-- See the GNU General Public License for more details. You should have
-- received a copy of the GNU General Public License with this distribution,
-- see file "<A HREF="GPL.txt">GPL.txt</A>". If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-- USA.
-- </BLOCKQUOTE>
-- <BLOCKQUOTE>
-- As a special exception from the GPL, 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 GPL. This exception does not however invalidate any
-- other reasons why the executable file might be covered by the GPL.
-- </BLOCKQUOTE>
--
-- <DL><DT><STRONG>
-- Author:</STRONG><DD>
-- Thomas Wolf (TW)
-- <ADDRESS><A HREF="mailto:twolf@acm.org">twolf@acm.org</A></ADDRESS></DL>
--
-- <DL><DT><STRONG>
-- Purpose:</STRONG><DD>
-- Root package for the support subsystem, which contains many generally
-- useful operations. Most of them are generic to be as widely applicable
-- as possible.</DL>
--
-- <DL><DT><STRONG>
-- Tasking semantics:</STRONG><DD>
-- N/A. Not abortion-safe.</DL>
--
-- <DL><DT><STRONG>
-- Storage semantics:</STRONG><DD>
-- No dynamic storage allocation.</DL>
--
-- <!--
-- Revision History
--
-- 24-NOV-2001 TW Initial version.
-- -->
-------------------------------------------------------------------------------
pragma License (Modified_GPL);
package GAL.Support is
pragma Elaborate_Body;
type Null_Type is null record;
-- May be useful in some instantiations, e.g. if you want a tree of
-- Integers only: package X is new GAL.ADT.Trees (Integer, Null_Type, ...);
Null_Object : constant Null_Type;
generic
type Item is private;
procedure Swap
(Left, Right : in out Item);
pragma Inline (Swap);
-- Tmp := Left; Left := Right; Right := Tmp;
private
Null_Object : constant Null_Type := (null record);
end GAL.Support;
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