[Ur] Catching errors

Edward Z. Yang ezyang at MIT.EDU
Sat May 19 00:51:48 EDT 2012


Is there a way to catch an 'error <xml>asdf</xml>'?  For example
the json module uses error to indicate parse failure, and instead
I'd like to catch it and try something else.

The onError function seems like a partial mechanism for this, but
I don't understand how scoping on onError works; if I register
something as onError, is it permanently called on error? Is it
displaced by the next onError I call?

Edward



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