Re: How to pass around access types to interfaces?

[Robert A Duff <bobduff@shell01.TheWorld.com>]

"Martin Krischik" <krischik@users.sourceforge.net> writes:

> Am 24.10.2008, 13:45 Uhr, schrieb Sven <sven.weidauer@gmail.com>:
>
>>   type My_Interface_Access is access all My_Interface'Class;
>
> Do you realy need an access type? Read:
>
> http://en.wikibooks.org/wiki/Ada_Programming/Object_Orientation#The_class-wide_type
>
> If so, does it need to be an access all? Read:

In my experience, access-to-class-wide types almost always need to have
"all", because you often want to convert from access-to-T2 up to
access-to-T1'Class (where T2 is a descendant of T1).

- Bob