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Re: Unibyte characters, strings, and buffers
From: |
David Kastrup |
Subject: |
Re: Unibyte characters, strings, and buffers |
Date: |
Sat, 29 Mar 2014 14:15:57 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux) |
Eli Zaretskii <address@hidden> writes:
>> From: David Kastrup <address@hidden>
>> Cc: address@hidden, address@hidden, address@hidden
>> Date: Sat, 29 Mar 2014 12:30:21 +0100
>>
>> Eli Zaretskii <address@hidden> writes:
>>
>> >> From: David Kastrup <address@hidden>
>> >
>> >> If we want different semantics for case-fold-search in binary buffers,
>> >> then the solution is setting a buffer-local setting of case-fold-search
>> >> when opening a buffer intended to be manipulated in a binary way.
>> >>
>> >> But the unibyte setting of the buffer should not affect normal character
>> >> and string operation semantics. It is a buffer implementation detail
>> >> that should not really have a visible effect apart from making some
>> >> buffer operations impossible.
>> >
>> > But if case-fold-search is set to nil in unibyte buffers, and (as we
>> > know) buffer-local value of case-fold-search does affects functions
>> > that compare text, either because they consult case-fold-search
>> > directly or because the consult buffer-local case-table, then the
>> > unibyte setting does affect the semantics, albeit indirectly.
>>
>> No, it doesn't. Correlation is not causation.
>
> But in this case, it is: they both stem from the same cause.
That's just word games, and pretty bad ones at that. Not interested.
>> > Not that I disagree with you, but why does it matter whether some
>> > code makes a buffer unibyte or sets its case-fold-search, to
>> > achieve that goal? In both cases, that something tells Emacs to
>> > ignore case conversion, it just uses 2 different ways of saying
>> > that. If we are not going to abolish unibyte buffers, how is the
>> > difference important?
>>
>> Because it makes things predictable. I can take a look at the
>> setting of case-fold-search in order to figure out what will happen
>> regarding the case folding of searches. If I want them to occur, I
>> can set the variable, and if I don't want them to occur, I can clear
>> that variable.
>
> The same is true about the unibyte flag.
So then we have two competing settings. How does that make things
predictable?
I think that there is nothing missing for reasonable people to come to a
decision by now, so there is nothing to be gained from me participating
further in this absurd spectacle.
--
David Kastrup
- Re: Unibyte characters, strings, and buffers, (continued)
- Re: Unibyte characters, strings, and buffers, Andreas Schwab, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Eli Zaretskii, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Andreas Schwab, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Eli Zaretskii, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Andreas Schwab, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Eli Zaretskii, 2014/03/29
- Re: Unibyte characters, strings, and buffers, David Kastrup, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Eli Zaretskii, 2014/03/29
- Re: Unibyte characters, strings, and buffers, David Kastrup, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Eli Zaretskii, 2014/03/29
- Re: Unibyte characters, strings, and buffers,
David Kastrup <=
- Re: Unibyte characters, strings, and buffers, Eli Zaretskii, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Andreas Schwab, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Eli Zaretskii, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Stephen J. Turnbull, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Stephen J. Turnbull, 2014/03/29
- Re: Unibyte characters, strings, and buffers, David Kastrup, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Stephen J. Turnbull, 2014/03/29
- Re: Unibyte characters, strings, and buffers, David Kastrup, 2014/03/29
- Re: Unibyte characters, strings, and buffers, Stephen J. Turnbull, 2014/03/29
- Re: Unibyte characters, strings, and buffers, David Kastrup, 2014/03/30