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Re: error trapping

  • From: "A. G. McDowell" <mcdowella@m...>
  • To: xml-dev@i...
  • Date: Thu, 21 Oct 1999 06:37:13 +0100

libxml error
In article <2aDHJHA9skD4EwHl@m...>, A. G. McDowell
<mcdowella@m...> 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.
A. G. McDowell   
... If it's not tested, it doesn't work!

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