From: Michael Heerdegen <michael_heerdegen@web.de>
To: Alan Mackenzie <acm@muc.de>
Cc: 25461@debbugs.gnu.org, Noam Postavsky <npostavs@users.sourceforge.net>
Subject: bug#25461: [Patch]: Missing doc strings for "," and ",@".
Date: Fri, 20 Jan 2017 01:24:37 +0100 [thread overview]
Message-ID: <8737gebmt6.fsf@web.de> (raw)
In-Reply-To: <20170119183639.GC3397@acm.fritz.box> (Alan Mackenzie's message of "Thu, 19 Jan 2017 18:36:39 +0000")
Alan Mackenzie <acm@muc.de> writes:
> > I agree backquote is the primary use, it's reasonable to emphasize
> > that.
>
> > Because "," isn't a macro, it doesn't have any semantics. It's
> ^^^^
> > misleading to suggest that it does.
>
> We could degenerate into a long silly discussion about what "have" means.
> , evaluates the form it precedes, and inserts it into the containing
> list. That's semantics enough for me.
It has a semantics - in the context of backquote. It's the backquote
macro whose (expanded) code "inserts" something. "," may have any
arbitrary semantics in another context, and per se, without context, it
has no fixed semantics.
> "`,' signals that the next form should be evaluated and inserted.
> It occurs in `\\=`' constructs.
I still find that wording misleading.
Regards,
Michael.
next prev parent reply other threads:[~2017-01-20 0:24 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-16 21:22 bug#25461: Missing doc strings for "," and ",@" Alan Mackenzie
2017-01-17 19:34 ` Glenn Morris
2017-01-17 19:56 ` Alan Mackenzie
2017-01-17 20:36 ` Andreas Schwab
2017-01-17 20:41 ` Alan Mackenzie
2017-01-17 20:53 ` Andreas Schwab
2017-01-18 1:44 ` Michael Heerdegen
2017-01-18 19:28 ` Alan Mackenzie
[not found] ` <handler.25461.B.148460180922707.ack@debbugs.gnu.org>
2017-01-18 19:43 ` bug#25461: [Patch]: " Alan Mackenzie
2017-01-19 0:16 ` npostavs
2017-01-19 17:37 ` Alan Mackenzie
2017-01-19 18:10 ` Noam Postavsky
2017-01-19 18:36 ` Alan Mackenzie
2017-01-20 0:24 ` Michael Heerdegen [this message]
2017-01-19 2:23 ` Michael Heerdegen
2017-01-19 17:58 ` Alan Mackenzie
2017-01-20 0:12 ` Michael Heerdegen
2017-01-20 16:58 ` Alan Mackenzie
2017-01-21 2:26 ` Michael Heerdegen
2017-01-21 15:56 ` Alan Mackenzie
2017-01-21 20:46 ` bug#25461: [Patch #2]: " Alan Mackenzie
2017-01-24 1:58 ` Michael Heerdegen
2017-01-24 19:43 ` Alan Mackenzie
2017-01-24 4:01 ` npostavs
2017-01-24 19:39 ` Alan Mackenzie
2017-01-24 20:00 ` Noam Postavsky
2017-01-23 19:09 ` bug#25461: [Patch]: " Alan Mackenzie
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