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From: stt@houdini.camb.inmet.com (Tucker Taft)
Subject: Re: system."+" renaming using GNAT
Date: 1999/01/13
Message-ID: <F5IszF.6qB.0.-s@inmet.camb.inmet.com>#1/1
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Date: 1999-01-13T00:00:00+00:00
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Oliver Hilgendorf (news@hilgendorf.de) wrote:

: The following statement

:       function "+" (Left : in System.Address; Right : in Integer)
: return System.Address renames system."+"; 

: works fine using the Rational Ada compiler (for Solaris) . It doesn't
: work with GNAT (for NT) since "+" is not defined in its package
: system.

: How can I make it work?

Ada 95 defines a "+" between Address and an integer type
in the package System.Storage_Elements.  The integer type
is System.Storage_Elements.Storage_Offset.  Hence,
don't make it a rename; instead, implement it portably as follows:

  with System.Storage_Elements;
   ...
    function "+"(Left : in System.Address; Right : in Integer)
    return System.Address is
    begin
       return System.Storage_Elements."+"(Left, System.Storage_Offset(Right));
    end "+";
    

: Oliver


--
-Tucker Taft   stt@averstar.com   http://www.averstar.com/~stt/
Technical Director, Distributed IT Solutions  (www.averstar.com/tools)
AverStar (formerly Intermetrics, Inc.)   Burlington, MA  USA