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bug#10099: Null (begin) blocks - V2.0.3 reports error was OK in V2.0.2

From: Andy Wingo
Subject: bug#10099: Null (begin) blocks - V2.0.3 reports error was OK in V2.0.2
Date: Fri, 25 Nov 2011 12:13:39 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)

Hi David,

Thanks for the note, and good to hear from you on the Guile side.  You
are right in pointing out areas that can improve.  As you might imagine,
we are currently more focussed on the current stable 2.0.x and
development 2.2.x series, so we probably won't do very much to the 1.8
documentation, for example.  I understand if you need to keep 1.8
support for a time, but the 2.0 documentation is much better.

I am going to open a new thread for the local-eval issue, if you don't

On Fri 25 Nov 2011 11:37, David Kastrup <address@hidden> writes:

> (lambda ())
> ((lambda () (begin)))
> ((lambda () (begin (begin))))

FWIW, we are not going to change to support these in any branch of
Guile.  No other Scheme does so, and we mostly take our language design
hints from the Scheme standards.

> I have switched to using *unspecified* and unspecified? by now, but it
> might be worth ironing out the strange behaviors of (begin) nevertheless
> in particular where they conflict with the behavior to be expected from
> the documentation (preferably both in v1.8 as well as v2), in addition
> to mentioning the more straightforward commands.

I'll see what we can do.  I think the decision here is going to depend
on what we do in 2.2 regarding (if #f #f).  In any case, we do need to
improve our documentation.


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