From: Mark H Weaver <mhw@netris.org>
To: Andy Wingo <wingo@pobox.com>
Cc: guile-devel@gnu.org
Subject: Re: guile 3 update, halloween edition
Date: Sat, 02 Nov 2019 15:33:55 -0400 [thread overview]
Message-ID: <87pniaoywx.fsf@netris.org> (raw)
In-Reply-To: <877e4irh0g.fsf@netris.org> (Mark H. Weaver's message of "Sat, 02 Nov 2019 01:20:04 -0400")
Mark H Weaver <mhw@netris.org> writes:
> Andy Wingo <wingo@pobox.com> writes:
>
>> [...] There will be bijections
>> between a Guile's "throw" arguments and structured exceptions, mostly
>> inspired with what Julian did in the R6RS layer already.
>
> For the record, the bijection between R6RS conditions and Guile's throw
> arguments was my work, not Julian's. See:
>
> https://git.savannah.gnu.org/cgit/guile.git/commit/?id=02500d44775a77e46febfd47a0dab8233b0c99d0
I should clarify that it's not a bijection in the strict mathematical
sense of the word, and it's not obvious to me how to define an efficient
bijection here. I assumed that you were using the term loosely to
describe an approximate bijection in non-pathological cases, but perhaps
I misunderstood. If you think you have a true bijection that can be
efficiently implemented, I'd like to hear the details. Anyway, prior to
the commit above, there was only a mapping in one direction, so nothing
even remotely close to a bijection.
Thanks,
Mark
next prev parent reply other threads:[~2019-11-02 19:33 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-30 20:13 guile 3 update, halloween edition Andy Wingo
2019-10-30 21:19 ` Christopher Lemmer Webber
2019-10-31 0:01 ` Chris Vine
2019-10-31 16:20 ` Andy Wingo
2019-10-31 17:27 ` Chris Vine
2019-10-31 1:31 ` Nala Ginrut
2019-10-31 1:47 ` Thompson, David
2019-10-31 14:17 ` Mikael Djurfeldt
2019-10-31 16:13 ` Andy Wingo
2019-10-31 14:46 ` David Pirotte
2019-10-31 16:44 ` Sjoerd van Leent
2019-11-02 5:20 ` Mark H Weaver
2019-11-02 19:33 ` Mark H Weaver [this message]
2019-11-03 19:16 ` Andy Wingo
2019-11-03 20:18 ` Mark H Weaver
2019-11-15 9:03 ` Ludovic Courtès
2019-11-15 10:23 ` Andy Wingo
2019-11-16 15:26 ` Ludovic Courtès
2019-11-17 19:33 ` Andy Wingo
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