Re: put of access type

[Martin Krischik <krischik@users.sourceforge.net>]

Rob Solomon schrieb:

> I see that access types are being used the same as pointer types, but
> if I understand correctly, are actually quite different.  But I don't
> understand how.  ie, how are access types and pointers different?

Access types can be smart pointers containing additional informations
used by garbage collectors. "Can" only JGNAT (targeting JVM) and MGNAT
(targeting CLI) currently feature a garbage collector.

Still there is at least one case where standart GNAT uses smart pointers
as well. Can't remember the details - but it has to to with anonymous
access types used as function parameter (a new feature introduced with
Ada 95). With GNAT this access type consist then of an pointer and
integer sized extra info.

Martin
-- 
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Ada programming at: http://ada.krischik.com