From: Michael Heerdegen <michael_heerdegen@web.de>
To: emacs-devel@gnu.org
Subject: Re: Delimited continuations
Date: Tue, 12 Dec 2017 15:27:57 +0100 [thread overview]
Message-ID: <87y3m8nhqq.fsf@web.de> (raw)
In-Reply-To: <m2bmj65p7v.fsf@newartisans.com> (John Wiegley's message of "Sun, 10 Dec 2017 11:59:16 -0800")
"John Wiegley" <johnw@gnu.org> writes:
> HM> (+ 1 2) is executed twice. I think this isn't necessarily so?
>
> Yes, except if you think about it, this "initial evaluation" whose
> results are thrown away can be used to establish lexical bindings to
> be captured by the lambda passed to shift; or to influence which shift
> is used within a complicated reset block.
This can be done in the "first run". I think it's the "second run" that
is "too much" because it doesn't belong to the limited continuation of
the context of `shift'.
Michael.
next prev parent reply other threads:[~2017-12-12 14:27 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-09 9:06 Delimited continuations John Wiegley
2017-12-10 16:53 ` Michael Heerdegen
2017-12-10 19:59 ` John Wiegley
2017-12-12 14:27 ` Michael Heerdegen [this message]
2017-12-11 16:47 ` Stefan Monnier
2017-12-12 14:17 ` Michael Heerdegen
2017-12-12 22:24 ` John Wiegley
2018-01-02 18:39 ` Christopher Lemmer Webber
2018-01-02 22:29 ` John Wiegley
2018-01-03 16:01 ` Michael Heerdegen
2018-01-03 20:12 ` Stefan Monnier
2017-12-10 17:39 ` Real continuations (was: Delimited continuations) Michael Heerdegen
2017-12-11 16:16 ` Real continuations Stefan Monnier
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