From: Philipp Stephani <p.stephani2@gmail.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>, emacs-devel@gnu.org
Subject: Re: pure-fns in byte-opt.el
Date: Tue, 25 Jul 2017 20:57:58 +0000 [thread overview]
Message-ID: <CAArVCkQizDCZFB4DtN5DAmZMUj3QGSygVwfAGw2rkXNd6kqa6A@mail.gmail.com> (raw)
In-Reply-To: <jwvtw20ob8o.fsf-monnier+gmane.emacs.devel@gnu.org>
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Stefan Monnier <monnier@iro.umontreal.ca> schrieb am Di., 25. Juli 2017 um
16:21 Uhr:
> >> I was curious about what other functions might be pure and could be
> >> added to this list. While I seem to have guessed correctly on some,
> >> I am perplexed why adding string-to-char breaks things:
> > Strings are not immutable.
>
> I agree that string-to-char is not a pure function, according to my
> understanding of the meaning of "pure" in such a context.
Why? Its return value clearly only depends on its argument, and it doesn't
change any global state. It's the poster child of a pure function!
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next prev parent reply other threads:[~2017-07-25 20:57 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-25 2:06 pure-fns in byte-opt.el Mark Oteiza
2017-07-25 8:14 ` Andreas Schwab
2017-07-25 14:16 ` Stefan Monnier
2017-07-25 20:57 ` Philipp Stephani [this message]
2017-07-25 21:27 ` Stefan Monnier
2017-07-25 22:28 ` Clément Pit-Claudel
2017-07-26 0:08 ` Stefan Monnier
2017-07-26 7:39 ` Clément Pit-Claudel
2017-07-26 12:58 ` Stefan Monnier
2017-07-28 17:45 ` Philipp Stephani
2017-07-28 17:49 ` Stefan Monnier
2017-07-28 17:52 ` Philipp Stephani
2017-07-28 22:20 ` Stefan Monnier
2017-09-24 7:31 ` Philipp Stephani
2017-09-24 16:23 ` Stefan Monnier
2017-09-25 22:06 ` Richard Stallman
2017-09-26 0:25 ` Stefan Monnier
2020-07-25 19:53 ` Philipp Stephani
2020-07-25 19:58 ` Stefan Monnier
2020-07-25 20:08 ` Philipp Stephani
2020-07-25 20:59 ` Stefan Monnier
2020-07-29 14:21 ` Philipp Stephani
2020-07-29 14:25 ` Stefan Monnier
2017-09-24 16:26 ` Drew Adams
2017-07-26 1:00 ` Mark Oteiza
2017-07-26 14:33 ` Eli Zaretskii
2017-07-27 2:36 ` Mark Oteiza
2017-07-27 2:46 ` Stefan Monnier
2017-07-29 16:43 ` Mark Oteiza
2017-07-29 17:22 ` Eli Zaretskii
2017-07-29 19:48 ` Mark Oteiza
2017-07-29 20:03 ` Andreas Schwab
2017-07-29 20:14 ` Mark Oteiza
2017-07-27 17:06 ` Eli Zaretskii
2017-07-28 0:24 ` Mark Oteiza
2017-07-28 7:02 ` Eli Zaretskii
2017-07-29 1:24 ` Mark Oteiza
2017-07-29 7:24 ` Eli Zaretskii
2017-07-29 16:34 ` Mark Oteiza
2017-07-29 17:21 ` Eli Zaretskii
2017-09-24 7:34 ` Philipp Stephani
2017-09-24 16:24 ` Stefan Monnier
2017-09-24 23:22 ` John Wiegley
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