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From: Drew Adams <drew.adams@oracle.com>
To: Alan Mackenzie <acm@muc.de>
Cc: npostavs@users.sourceforge.net, Eli Zaretskii <eliz@gnu.org>,
	Paul Eggert <eggert@cs.ucla.edu>,
	emacs-devel@gnu.org
Subject: RE: Change of Lisp syntax for "fancy" quotes in Emacs 27?
Date: Sat, 6 Oct 2018 14:57:20 +0000 (UTC)	[thread overview]
Message-ID: <ab22382f-6815-4c64-ac08-46fcb14db078@default> (raw)
In-Reply-To: <20181006091422.GA4855@ACM>

> > This is a judgment call, but we should _let Lisp judge_
> > about syntax errors, based on, well, its own syntax. If you
> > use (let (foo  foo)...), where there is a no-break space
> > between foo and foo, so be it. That's a single symbol,
> > `foo foo'.
> 
> Do we even allow the syntax (let ((foo))...)?  If we do, then why?
> There's (let (foo)...) and (let ((foo nil))...) for binding a symbol to
> nil.

Yes, sorry. I wasn't paying attention to the parens in that
example.

My point was only that use of `foo foo' (with a no-break
space between the two foo's) as a mistake/typo for an
intended `foo foo' (with a normal space) should not be
signaled by Lisp as an error. But the no-break space could
be highlighted as sometimes helpful info. `foo foo' (with
no-break space) is just a symbol, for Lisp - not a syntax
error.

E.g. (changing the example):

(let (foo foo)...) binds symbol `foo foo' (with a no-break
space) to nil. It doesn't bind symbol `foo' to the current
value of symbol `foo'.

So, e.g., if symbol `foo' happens to be unbound then
even evaluation of that binding won't raise an error
(e.g. unbound variable `foo').



  parent reply	other threads:[~2018-10-06 14:57 UTC|newest]

Thread overview: 98+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-02 22:24 Change of Lisp syntax for "fancy" quotes in Emacs 27? Noam Postavsky
2018-02-02 22:52 ` Paul Eggert
2018-02-03  0:00   ` Drew Adams
2018-02-03  0:09     ` Paul Eggert
2018-02-03  0:39       ` Drew Adams
2018-02-03  8:33 ` Eli Zaretskii
2018-02-03 16:16   ` Drew Adams
2018-02-03 17:05     ` Eli Zaretskii
2018-02-04  1:16       ` Michael Heerdegen
2018-02-04  1:25         ` Clément Pit-Claudel
2018-02-04  2:05           ` Drew Adams
2018-02-04  2:06           ` Michael Heerdegen
2018-02-04 10:34           ` Alan Third
2018-02-04 15:36             ` Clément Pit-Claudel
2018-02-04 17:37               ` Eli Zaretskii
2018-02-04 21:31                 ` Noam Postavsky
2018-02-04 11:15         ` Alan Mackenzie
2018-02-04 15:54           ` Drew Adams
2018-02-04 14:47         ` Noam Postavsky
2018-02-04  1:55       ` Drew Adams
2018-02-04  2:10         ` Noam Postavsky
2018-02-05  1:06       ` Why "symbol's value" error about a list? Richard Stallman
2018-02-05 20:35         ` Alan Mackenzie
2018-02-05 21:46           ` Drew Adams
2018-02-06  4:13             ` Eli Zaretskii
2018-02-06  7:32               ` Tim Cross
2018-02-06  7:40                 ` Eli Zaretskii
2018-02-06 15:45                 ` Drew Adams
2018-02-06 15:45               ` Drew Adams
2018-02-06 19:17                 ` Eli Zaretskii
2018-02-06 14:51           ` Richard Stallman
2018-02-06 11:27         ` Noam Postavsky
2018-02-06 14:53           ` Richard Stallman
2018-02-06 18:59             ` Eli Zaretskii
2018-02-07  2:40               ` Richard Stallman
2018-02-07  3:42                 ` Eli Zaretskii
2018-02-06 18:52           ` Eli Zaretskii
2018-02-05  1:06       ` Change of Lisp syntax for "fancy" quotes in Emacs 27? Richard Stallman
2018-02-03 18:13 ` Aaron Ecay
2018-02-04  2:05   ` Drew Adams
2018-02-04  4:51   ` Paul Eggert
2018-02-04  9:47     ` Andreas Schwab
2018-02-04 15:04     ` Noam Postavsky
2018-02-04 17:33       ` Eli Zaretskii
2018-02-04 19:36         ` Paul Eggert
2018-02-04 19:55           ` Philipp Stephani
2018-02-04 20:10           ` Eli Zaretskii
2018-02-04 20:36             ` Eli Zaretskii
2018-02-04 20:48               ` Paul Eggert
2018-02-04 20:59                 ` Clément Pit-Claudel
2018-10-05  0:03 ` Noam Postavsky
2018-10-05  1:01   ` Paul Eggert
2018-10-05  8:43     ` Eli Zaretskii
2018-10-05 23:02       ` Paul Eggert
2018-10-06  0:20         ` Drew Adams
2018-10-06  9:14           ` Alan Mackenzie
2018-10-06 14:34             ` Stefan Monnier
2018-10-06 14:57             ` Drew Adams [this message]
2018-10-06 15:42               ` Garreau, Alexandre
2018-10-06 16:10             ` Paul Eggert
2018-10-06 16:17           ` Paul Eggert
2018-10-07  1:13             ` Drew Adams
2018-10-08  3:51             ` Richard Stallman
2018-10-06 10:11         ` Eli Zaretskii
2018-10-06 15:51           ` Paul Eggert
2018-10-06 16:45             ` Eli Zaretskii
2018-10-06 18:03               ` Paul Eggert
2018-10-06 18:29                 ` Eli Zaretskii
2018-10-06 19:18                   ` Paul Eggert
2018-10-06 19:30                   ` Paul Eggert
2018-10-06 19:32                   ` Garreau, Alexandre
2018-10-06 11:22         ` Garreau, Alexandre
2018-10-06 11:50           ` Eli Zaretskii
2018-10-06 12:10             ` Garreau, Alexandre
2018-10-06 14:00               ` Eli Zaretskii
2018-10-24 22:25                 ` Noam Postavsky
2018-10-06 13:15             ` Unicode security-issues workarounds elsewhere [Was: Re: Change of Lisp syntax for "fancy" quotes in Emacs 27?] Garreau, Alexandre
2018-10-06 14:01               ` Eli Zaretskii
2018-10-06 16:24           ` Change of Lisp syntax for "fancy" quotes in Emacs 27? Paul Eggert
2018-10-06 16:40             ` Stefan Monnier
2018-10-09 14:43         ` Noam Postavsky
2018-10-09 15:30           ` Paul Eggert
2018-10-09 16:13             ` Eli Zaretskii
2018-10-09 17:07               ` Paul Eggert
2018-10-09 19:18                 ` Andreas Schwab
2018-10-10  9:39                   ` Aaron Ecay
2018-10-10 11:18                     ` Garreau, Alexandre
2018-10-10 14:31                       ` Eli Zaretskii
2018-10-10 15:18                   ` Eli Zaretskii
2018-10-10 15:43                     ` Drew Adams
2018-10-10 16:08                     ` Yuri Khan
2018-10-15 20:30                       ` Juri Linkov
2018-10-10  3:58                 ` Richard Stallman
2018-10-10  3:57           ` Richard Stallman
2018-10-10 14:41             ` Eli Zaretskii
2018-10-11  5:01               ` Richard Stallman
2018-10-06 15:40   ` eval-last-sexp / C-x C-e, and punctuation like `?’' [Was: Re: Change of Lisp syntax for "fancy" quotes in Emacs 27?)] Garreau, Alexandre
2018-10-16 12:48   ` Change of Lisp syntax for "fancy" quotes in Emacs 27? Garreau, Alexandre

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