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From: Phillip Lord <p.lord@russet.org.uk>
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Subject: Re: Using custom as a type checker:- ramble
Date: 27 Mar 2003 17:11:03 +0000
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>>>>> "Stefan" == Stefan Monnier <monnier+gnu.emacs.help/news/@flint.cs.yale.edu> writes:

  Stefan> It should be possible to get the desired result without
  Stefan> implementing an elisp interpreter in elisp, but instead by
  Stefan> temporarily rebinding `setq' as a macro (and things like
  Stefan> that).
  >> I think that would be fairly hard! setq is such a basic function,
  >> and to change it so that it worked correctly, but still failed at
  >> the appropriate time.

  Stefan> I don't intend it to fail any more than the plain `setq'
  Stefan> does.  The only difference would be a bunch of warnings.

Ah, okay. I was thinking of signalling errors, but warning is also
fine. 

Cheers

Phil