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From: | David Kastrup |
Subject: | Re: Why not support (begin), (cond), (case-lambda), etc? |
Date: | Fri, 06 Jan 2012 18:02:24 +0100 |
User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/24.0.92 (gnu/linux) |
Mark H Weaver <address@hidden> writes: > David Kastrup <address@hidden> writes: > >> Correct me if I am wrong (I actually have not really understood syntax >> transformers), but the usual patterns of xxx ... can't be empty (that >> is, > > Actually, you are wrong here. "e ..." can be empty. If you want to > prohibit the empty list, you need to write something like "e0 e ..." > instead. Glad to hear it. I am pretty sure I have seen a number of examples that covered the empty case extra but maybe part of the reason could have been the necessity to _grab_ the first element. -- David Kastrup
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