error trapping

[A. G. McDowell]

In article <2aDHJHA9skD4EwHl at mcdowella.demon.co.uk>, A. G. McDowell
<mcdowella at mcdowella.demon.co.uk> writes
>
>The suggested alternative to resumption makes most sense in the context
>of resource acquisition. Sacrificing rigor for brevity:
>while((resource = acquire()) != null) callback();
>The callback should either release some more resource or throw a
>(terminating) exception, so you exit the loop either normally, with the
>resource, or via the exception.
>
but meant
while((resource = acquire()) == null) callback();

assuming that acquire() returns null when it fails to get the resource,
so that is when we need to callback and retry.
Oops!
-- 
A. G. McDowell   
... If it's not tested, it doesn't work!

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1
To unsubscribe, mailto:majordomo at ic.ac.uk the following message;
unsubscribe xml-dev
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)