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What does this bit of code do?
- To: firstname.lastname@example.org (Sandra J Loosemore)
- Subject: What does this bit of code do?
- From: Rob MacLachlan <RAM@>
- Date: Mon, 02 Mar 1987 16:35:00 -0000
- Cc: common-lisp@SAIL.STANFORD.EDU
- In-reply-to: Msg of 2 Mar 1987 12:26-EST from sandra%utah-orion at utah-cs.arpa (Sandra J Loosemore)
Date: Monday, 2 March 1987 12:26-EST
From: sandra%utah-orion at utah-cs.arpa (Sandra J Loosemore)
To: Kent M Pitman <KMP at scrc-stony-brook.arpa>
Re: What does this bit of code do?
It occurs to me that one of the strangenesses of exiting from the cleanup
forms of an unwind-protect is that CLtL requires throw to find a matching
catch before proceeding to do anything, even though the throw might never
actually return control to that catch! Weird....
Actually this is required anyway, since in the case where the catch
tag is not found, the error is required to be signalled without having
processed any unwind protect cleanups or done any unwinding. See the
Throw definition on page 142 in CLTL.