From: Drew Adams <drew.adams@oracle.com>
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: 26564@debbugs.gnu.org, Kaushal Modi <kaushal.modi@gmail.com>
Subject: bug#26564: Document that only functions and not variables can end with "-p"
Date: Wed, 19 Apr 2017 15:01:04 -0700 (PDT) [thread overview]
Message-ID: <716db14c-b67b-4477-b4c2-75478df0c313@default> (raw)
In-Reply-To: <87h91kdqdv.fsf@drachen>
> > 3. Is there a proposal for a _different_ naming convention
> > for Boolean variables? I'd argue that we should have some
> > such a naming convention. And I'd argue that it should be
> > different for options and non-option variables.
>
> That's a good point indeed.
>
> An alternative to "-p" would be "is-", like `foo-is-negative'.
Not great for cases where "has-" would be more appropriate (and
vice versa, for cases where "is-" would be more appropriate).
Not good for lots of other cases too.
E.g., `box-cursor-when-idle-p' or `use-foo-bar-p' or
`remove-foo-props-p' or `iac1-was-cycling-p' or
`foo-names-only-p' or `hl-line-when-idle-p'?
I suggest we stay away from helper verbs (or even any words).
Verbs, in particular, can be different for singular and plural
(e.g. `fancy-candidates-p').
> Not using -p would also have an advantage: you could distinguish
> boolean variables from variables bound to a predicate function.
How is it difficult to distinguish those if `-p' is used for
both?
It's true that in some (very few) contexts just looking at
"'foo-p" in some code might not let you know whether `foo-p'
is a variable or a function (or is both), but it is trivial
to find out which is the case, for any symbol that is already
defined as a variable or a function.
next prev parent reply other threads:[~2017-04-19 22:01 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-19 15:47 bug#26564: Document that only functions and not variables can end with "-p" Kaushal Modi
2017-04-19 16:08 ` Eli Zaretskii
2017-04-19 16:22 ` Kaushal Modi
2017-04-19 21:49 ` Michael Heerdegen
2017-04-19 22:04 ` Drew Adams
2017-04-19 22:18 ` Michael Heerdegen
2019-10-12 20:27 ` Lars Ingebrigtsen
2019-10-12 20:47 ` Kaushal Modi
2019-10-12 23:18 ` Drew Adams
2019-10-14 1:50 ` Richard Stallman
2019-10-14 2:22 ` Drew Adams
2019-10-14 7:24 ` Eli Zaretskii
2019-10-14 7:21 ` Eli Zaretskii
2017-04-19 17:26 ` Drew Adams
2017-04-19 21:44 ` Michael Heerdegen
2017-04-19 22:01 ` Drew Adams [this message]
2017-04-19 22:23 ` Michael Heerdegen
2017-04-19 22:28 ` Drew Adams
2017-04-20 1:42 ` Drew Adams
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