From: philippe schnoebelen <schnoebelen.ph@gmail.com>
To: "Mattias Engdegård" <mattiase@acm.org>
Cc: HaiJun Zhang <netjune@outlook.com>,
Emacs developers <emacs-devel@gnu.org>
Subject: Re: regular expressions that match nothing
Date: Mon, 20 May 2019 09:56:47 +0200 [thread overview]
Message-ID: <CADqJmR356cduYr32njDQaO_1Fg8fsCkOjOXqibd3sWX8L-DLKw@mail.gmail.com> (raw)
In-Reply-To: <0E7D1DF3-682F-4FB9-8378-FEA3E9FDE5E9@acm.org>
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The (real) risk of misunderstanding exists with all options that include
"null", "empty", "void", "nothing", "nada". The name refers to a set of
matches but can be understood as qualifying the match itself, as a set of
chars. If you teach programming and mark code written by students, you know
that the confusion will definitely happen.
This is why I much prefer Alan's re-nomatch suggestion.
On Sun, 19 May 2019 at 09:33, Mattias Engdegård <mattiase@acm.org> wrote:
> 19 maj 2019 kl. 07.00 skrev HaiJun Zhang <netjune@outlook.com>:
> >
> > > regexp-null? It's also a little cryptic, but it's short!
> >
> > What about regexp-nothing or re-nothing?
>
> Those are fair suggestions and close to the mathematical meaning, but
> could possibly be misunderstood as patterns (only) matching the empty
> string.
>
>
>
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next prev parent reply other threads:[~2019-05-20 7:56 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-14 7:25 regular expressions that match nothing philippe schnoebelen
2019-05-14 10:14 ` Mattias Engdegård
2019-05-14 19:41 ` Stefan Monnier
2019-05-15 16:21 ` Mattias Engdegård
2019-05-15 19:41 ` Alan Mackenzie
2019-05-16 10:54 ` Mattias Engdegård
2019-05-16 23:18 ` Phil Sainty
2019-05-17 9:43 ` Alan Mackenzie
2019-05-17 10:17 ` Mattias Engdegård
2019-05-17 12:53 ` Stefan Monnier
2019-05-15 20:17 ` Michael Heerdegen
2019-05-15 21:06 ` Stefan Monnier
2019-05-15 21:07 ` Mattias Engdegård
2019-05-15 21:38 ` Michael Heerdegen
2019-05-16 6:57 ` More re odditie [Was: regular expressions that match nothing] phs
2019-05-16 9:29 ` Mattias Engdegård
2019-05-16 10:59 ` phs
2019-05-16 12:31 ` Stefan Monnier
2019-05-16 18:35 ` Michael Heerdegen
2019-05-16 20:31 ` Mattias Engdegård
2019-05-16 21:01 ` Global and local definitions of non-functions/variable (was: More re odditie [Was: regular expressions that match nothing]) Stefan Monnier
2019-05-20 16:26 ` Bootstrap/autoload policy (was Re: regular expressions that match nothing) Mattias Engdegård
2019-05-22 14:02 ` Stefan Monnier
2019-05-22 14:07 ` Mattias Engdegård
2019-05-22 14:24 ` Stefan Monnier
2019-05-22 15:06 ` Mattias Engdegård
2019-05-22 15:53 ` Stefan Monnier
2019-05-22 16:40 ` Mattias Engdegård
2019-05-22 19:08 ` Stefan Monnier
2019-05-26 12:05 ` Basil L. Contovounesios
2019-05-16 18:12 ` regular expressions that match nothing Eric Abrahamsen
2019-05-19 4:30 ` 回复: " net june
2019-05-19 5:00 ` HaiJun Zhang
2019-05-19 7:32 ` Mattias Engdegård
2019-05-20 7:56 ` philippe schnoebelen [this message]
2019-05-20 23:19 ` Richard Stallman
2019-05-19 14:12 ` 回复: " Drew Adams
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