From: Lars Ingebrigtsen <larsi@gnus.org>
To: Arthur Miller <arthur.miller@live.com>
Cc: emacs-devel@gnu.org
Subject: Re: Docs for &optional and &rest arguments together
Date: Thu, 31 Dec 2020 05:43:55 +0100 [thread overview]
Message-ID: <877doyoa9g.fsf@gnus.org> (raw)
In-Reply-To: <AM0PR06MB6577D086DD918C31A82C283F96D70@AM0PR06MB6577.eurprd06.prod.outlook.com> (Arthur Miller's message of "Wed, 30 Dec 2020 13:19:47 +0100")
Arthur Miller <arthur.miller@live.com> writes:
>> The paragraph just below this one, though, describes in detail what
>> happens with a mixed &optional and &rest argument list, so that's not my
>> impression when reading that node.
>
> "A call to the function requires one actual argument for each of the
No, this bit:
For example, an argument list that looks like this:
(a b &optional c d &rest e)
binds a and b to the first two actual arguments, which are required. If
one or two more arguments are provided, c and d are bound to them
respectively; any arguments after the first four are collected into a
list and e is bound to that list. Thus, if there are only two
arguments, c, d and e are nil; if two or three arguments, d and e are
nil; if four arguments or fewer, e is nil. Note that exactly five
arguments with an explicit nil argument provided for e will cause that
nil argument to be passed as a list with one element, (nil), as with any
other single value for e.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
next prev parent reply other threads:[~2020-12-31 4:43 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-29 13:26 Docs for &optional and &rest arguments together Arthur Miller
2020-12-29 15:10 ` Adam Porter
2020-12-29 17:06 ` arthur miller
2021-01-01 14:33 ` Arthur Miller
2020-12-30 3:12 ` Lars Ingebrigtsen
2020-12-30 12:19 ` Arthur Miller
2020-12-30 12:54 ` Yuri Khan
2020-12-31 4:43 ` Lars Ingebrigtsen [this message]
2020-12-31 7:55 ` arthur miller
2020-12-31 11:26 ` tomas
2020-12-31 16:45 ` Drew Adams
2020-12-31 17:04 ` Drew Adams
2020-12-31 17:28 ` arthur miller
2020-12-31 18:19 ` Drew Adams
2020-12-31 20:01 ` arthur miller
2020-12-31 20:27 ` Drew Adams
2020-12-31 17:08 ` arthur miller
2020-12-31 17:30 ` Daniel Brooks
2020-12-31 19:53 ` arthur miller
2020-12-31 19:40 ` tomas
-- strict thread matches above, loose matches on Subject: below --
2020-12-31 20:04 arthur miller
2020-12-31 20:35 ` tomas
2020-12-31 23:18 ` arthur miller
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