From: npostavs@users.sourceforge.net
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: 24542@debbugs.gnu.org
Subject: bug#24542: 25.1.50; The symbol `@' and sexp scanning
Date: Tue, 03 Jan 2017 08:03:54 -0500 [thread overview]
Message-ID: <87inpw5m85.fsf@users.sourceforge.net> (raw)
In-Reply-To: <87pok48g65.fsf@web.de> (Michael Heerdegen's message of "Tue, 03 Jan 2017 13:46:26 +0100")
Michael Heerdegen <michael_heerdegen@web.de> writes:
>> `@' has the prefix syntax flag, the elisp manual says `(elisp) Syntax Flags':
>>
>> * `p' identifies an additional prefix character for Lisp syntax.
>> These characters are treated as whitespace when they appear between
>> ^^^^^^^^^^^^^^^^^^^^^
>> expressions. When they appear within an expression, they are
>> handled according to their usual syntax classes.
>>
>> So (eq element '@) acts the same as (eq element ' ).
>
> I don't agree with your interpretation. `@' is an (textual
> representation of an) expression in the above example, so "these
> characters" don't "appear between expressions" in this case. Could be
> that this wording led to a wrong implementation, however.
Well, it's a bit ambiguous whether a character sequence composed soley
of prefix characters should be considered an expression or not.
Obviously the end result is wrong for Lisp, i.e., does not correspond
with what `read' thinks.
next prev parent reply other threads:[~2017-01-03 13:03 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-25 17:42 bug#24542: 25.1.50; The symbol `@' and sexp scanning Michael Heerdegen
2017-01-02 16:58 ` Michael Heerdegen
2017-01-02 20:37 ` npostavs
2017-01-03 12:46 ` Michael Heerdegen
2017-01-03 13:03 ` npostavs [this message]
2020-09-04 13:05 ` Lars Ingebrigtsen
2020-09-04 13:31 ` Eli Zaretskii
2020-09-04 14:22 ` Stefan Monnier
2024-04-10 23:06 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-11 3:42 ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-12 17:29 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-12 21:32 ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-13 1:55 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
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