GNU bug report logs - #16357
insufficient print abbreviation in error messages

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From: Mark H Weaver <mhw <at> netris.org>
To: Andy Wingo <wingo <at> pobox.com>
Cc: Zefram <zefram <at> fysh.org>, 16357 <at> debbugs.gnu.org, guile-devel <at> gnu.org
Subject: bug#16357: insufficient print abbreviation in error messages
Date: Sat, 25 Jun 2016 21:05:36 -0400

Andy Wingo <wingo <at> pobox.com> writes:

> On Thu 23 Jun 2016 18:57, Mark H Weaver <mhw <at> netris.org> writes:
>
>> Andy Wingo <wingo <at> pobox.com> writes:
>>> Or, we could use print states.  But print states are not so great and
>>> ideally we would remove them eventually.
>>
>> We will need print states, or something like them, to support writing
>> cyclic data structures as required by R7RS.
>
> I was thinking parameters would be sufficient.  Dunno.  WDYT about that?

Parameters would propagate to places where we don't want them to
propagate.  For example, if in the course of running a custom printer,
some internal procedure prints something to a different port, e.g. to a
string port, then the parameter would still take effect.

      Mark

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