GNU bug report logs - #13644
String read syntax should allow "\(" to mean "("

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: David Kastrup <dak <at> gnu.org>
To: bug-guile <at> gnu.org
Subject: String read syntax should allow "\(" to mean "("
Date: Thu, 07 Feb 2013 10:12:36 +0100

Rationale: GUILE already supports a number of escapes not defined in the
Scheme standard.  Emacs Lisp modes and derivative modes treat opening
parens in the first column of a file specially, resynchronizing function
boundaries.  The respective manual entry states:

<URL:http://www.gnu.org/software/emacs/manual/html_node/emacs/Left-Margin-Paren.html>

Being able to escape opening parens makes it possible to write
Emacs-friendly Guile code.

-- 
David Kastrup

Message #8 received at 13644 <at> debbugs.gnu.org (full text, mbox):

From: Andy Wingo <wingo <at> pobox.com>
To: David Kastrup <dak <at> gnu.org>
Cc: 13644 <at> debbugs.gnu.org
Subject: Re: bug#13644: String read syntax should allow "\(" to mean "("
Date: Sat, 09 Mar 2013 09:54:55 +0100

On Thu 07 Feb 2013 10:12, David Kastrup <dak <at> gnu.org> writes:

> Rationale: GUILE already supports a number of escapes not defined in the
> Scheme standard.  Emacs Lisp modes and derivative modes treat opening
> parens in the first column of a file specially, resynchronizing function
> boundaries.  The respective manual entry states:
>
> <URL:http://www.gnu.org/software/emacs/manual/html_node/emacs/Left-Margin-Paren.html>
>
> Being able to escape opening parens makes it possible to write
> Emacs-friendly Guile code.

It's not a bad idea.  I'm hesitant to add new string syntax, though, and
would appreciate input from other people before going ahead with this.

You can of course work around this with hex escapes, though that is not
very readable.

Andy
-- 
http://wingolog.org/

Message #11 received at 13644 <at> debbugs.gnu.org (full text, mbox):

From: David Kastrup <dak <at> gnu.org>
To: Andy Wingo <wingo <at> pobox.com>
Cc: 13644 <at> debbugs.gnu.org
Subject: Re: bug#13644: String read syntax should allow "\(" to mean "("
Date: Sat, 09 Mar 2013 11:12:00 +0100

Andy Wingo <wingo <at> pobox.com> writes:

> On Thu 07 Feb 2013 10:12, David Kastrup <dak <at> gnu.org> writes:
>
>> Rationale: GUILE already supports a number of escapes not defined in the
>> Scheme standard.  Emacs Lisp modes and derivative modes treat opening
>> parens in the first column of a file specially, resynchronizing function
>> boundaries.  The respective manual entry states:
>>
>> <URL:http://www.gnu.org/software/emacs/manual/html_node/emacs/Left-Margin-Paren.html>
>>
>> Being able to escape opening parens makes it possible to write
>> Emacs-friendly Guile code.
>
> It's not a bad idea.  I'm hesitant to add new string syntax, though, and
> would appreciate input from other people before going ahead with this.
>
> You can of course work around this with hex escapes, though that is not
> very readable.

A slightly better workaround is using \ at the end of the preceding line
and \n( on the afflicted line itself.  But it does not exactly win a
beauty competition either.

-- 
David Kastrup

Message #18 received at 13644-done <at> debbugs.gnu.org (full text, mbox):

From: Mark H Weaver <mhw <at> netris.org>
To: David Kastrup <dak <at> gnu.org>
Cc: 13644-done <at> debbugs.gnu.org
Subject: Re: bug#13644: String read syntax should allow "\(" to mean "("
Date: Wed, 01 Oct 2014 21:05:53 -0400

I went ahead and pushed this to stable-2.0, commit
5af307de43e4b65eec7f235b48a8908f2a00f134.  It'll be in Guile 2.0.12.
I'm closing this ticket.

     Thanks,
       Mark

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