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Re: Syntax change proposal:
From: |
David Kastrup |
Subject: |
Re: Syntax change proposal: |
Date: |
Thu, 19 Jul 2012 15:43:08 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.1.50 (gnu/linux) |
"Trevor Daniels" <address@hidden> writes:
> David Kastrup wrote Monday, July 16, 2012 9:18 AM
>
>
>> Graham Percival <address@hidden> writes:
>>
>>> On Mon, Jul 16, 2012 at 02:02:31AM +0200, David Kastrup wrote:
>>>>
>>>> One really ugly problem is interpreting things like "4.". Looks like a
>>>> duration, but then we have
>>>> input/regression/dynamics-broken-hairpin.ly: line-width = 4.\cm
>>>
>>> I am against making a change like this outwith[1] of GLISS. It
>>> could involve a lot of user pain (and documentation-editing
>>> pain!), so I think it's important to at least pretend[2] to have
>>> good user consultation beforehand.
>>
>> I disagree with "a lot of user pain".
>>
>>> As far as the actual proposal goes, I'm generally in favor.
>
> [snip a long convincing argument]
>
> I'm generally in favour too, but I'd be happier if this were deferred
> until 2.17.
Well, let's see what the parser currently delivers in INITIAL mode.
. character .
-. REAL 0.0
-.0 REAL -0.0
-0.0 character - followed by 0.0
Now how do we explain that there are contexts where -.3 is a valid REAL
whereas -0.3 isn't?
Or that -. is a REAL with a value different from -.0 whereas . is a
character?
I am not convinced that this is an area that's really good for keeping.
The semantics of -., for example, were introduced in 2.15.9 with
commit da949cdcede0ffb559e9e5e2adbae2088ba1f6d6
Author: Keith OHara <address@hidden>
Date: Wed Aug 10 00:57:44 2011 -0700
lexer.ll: remove unused patterns, avoid backing up
so it is not like stable release users rely on them. While most is
older than that, I am not overly impressed with it either.
--
David Kastrup
- Syntax change proposal:, David Kastrup, 2012/07/15
- Re: Syntax change proposal:, Graham Percival, 2012/07/15
- Re: Syntax change proposal:, David Kastrup, 2012/07/16
- Re: Syntax change proposal:, Trevor Daniels, 2012/07/19
- Re: Syntax change proposal:,
David Kastrup <=
- Re: Syntax change proposal:, Trevor Daniels, 2012/07/19
- Re: Syntax change proposal:, David Kastrup, 2012/07/19
- Re: Syntax change proposal:, Trevor Daniels, 2012/07/19
- Re: Syntax change proposal:, David Kastrup, 2012/07/19
- Re: Syntax change proposal:, Trevor Daniels, 2012/07/19
- Re: Syntax change proposal:, Benkő Pál, 2012/07/19
- Re: Syntax change proposal:, Keith OHara, 2012/07/25
- Re: Syntax change proposal:, David Kastrup, 2012/07/25
- Re: Syntax change proposal:, Keith OHara, 2012/07/25
- Re: Syntax change proposal:, David Kastrup, 2012/07/25