[PATCH] psyntax tail patterns

[Andreas Rottmann]

Hi!

This is a followup on my earlier message on this topic[0]. I've prepared
a patch that adds partial support for tail patterns. Things like the the
SRFI-34 `guard' macro from [0] are supported, but you still can't
combine dotted patterns with tail patterns, e.g.

(syntax-rules (else)
  ((foo bar ... (else something) . rest)
   <TEMPLATE-HERE>))

will *not* work; there's the issue that one can't just transcribe
the implementation of this feature from the latest version of psyntax,
as I've done for non-dotted tail patterns, as it's implemented using a
dotted pattern like the above. Alas!

[ As a side remark, I don't really understand why one has to implement a
  macro expander in a way that requires bootstrapping ]

syncase-tail-patterns.diff
Description: Text Data

[0] <http://article.gmane.org/gmane.lisp.guile.devel/9442>

Regards, Rotty
-- 
Andreas Rottmann -- <http://rotty.yi.org/>