From: Alan Mackenzie <acm@muc.de>
To: Noam Postavsky <npostavs@gmail.com>
Cc: 31792@debbugs.gnu.org
Subject: bug#31792: 27.0.50; Regression in #'labels, recent versions
Date: 13 Jun 2018 16:57:03 -0000 [thread overview]
Message-ID: <20180613165703.46841.qmail@mail.muc.de> (raw)
In-Reply-To: <mailman.1699.1528759928.1292.bug-gnu-emacs@gnu.org>
In article <mailman.1699.1528759928.1292.bug-gnu-emacs@gnu.org> you wrote:
> found 31792 25.3
> quit
> Aidan Kehoe <kehoea@parhasard.net> writes:
>> When I do the same in the emacs 22.1.1 that Apple built and shipped with
>> my OS, I get a compiled function object, as is much closer to being the
>> correct behaviour.
> Seems to have regressed in Emacs 25, cl-labels still works correctly.
> Here's a smaller reproducer:
> (labels ((foo () t))
> #'foo) ;=> foo
> (cl-labels ((foo () t))
> #'foo) ;=> (lambda nil t)
Just as a matter of interest, the doc strings for both these functions
are poor.
That for cl-labels says "make temporary function bindings" without saying
what a "function binding" is (it's not obvious), without saying what
functions (?or symbols) are being bound, and doesn't say whether they get
bound one after the other (in `let*' fashion) or all at once (in `let'
fashion).
It goes on to say "The bindings can be recursive, ...". This is
gibberish to me.
Further, "the scoping is lexical". The scoping of what is lexical? And
in what?
I dare say I could fathom out most of these things with effort, but I
shouldn't have to. Maybe this macro could be of use to me, but with the
doc string as it is, I'll never find out. Pity.
--
Alan Mackenzie (Nuremberg, Germany).
next prev parent reply other threads:[~2018-06-13 16:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-11 23:11 bug#31792: 27.0.50; Regression in #'labels, recent versions Aidan Kehoe
2018-06-11 23:31 ` Noam Postavsky
2018-06-12 22:58 ` Noam Postavsky
2018-06-13 13:16 ` Stefan Monnier
2018-06-14 3:24 ` Noam Postavsky
2018-06-14 3:32 ` Stefan Monnier
2018-06-14 4:13 ` Noam Postavsky
2018-06-14 18:05 ` Stefan Monnier
2018-06-20 0:08 ` Noam Postavsky
[not found] ` <mailman.1699.1528759928.1292.bug-gnu-emacs@gnu.org>
2018-06-13 16:57 ` Alan Mackenzie [this message]
2018-06-13 17:03 ` Noam Postavsky
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