Re: modify-syntax-entry and UTF8?

[Geoffrey Alan Washburn <geoffw@cis.upenn.edu>]

Miles Bader wrote:
> Geoffrey Alan Washburn <geoffw@cis.upenn.edu> writes:
>> Still broken, at least in the latest CVS version of the emacs-unicode-2 
>> branch.  Is there another branch that I should be using (or alternately
>> have its changes merged into emacs-unicode-2)?
> 
> I'm using my own branch, derived from the CVS emacs-unicode-2 branch
> (I don't think my personal changes are relevant to this area).
> 
> So how come it works for me but not for you?
> 
> I use the following command to invoke Emacs (where /tmp/m is your
> message):
> 
>    env - TERM=xterm emacs -nw -Q /tmp/m
> 
> [The non-ascii chars are displayed as question-marks because Emacs
> doesn't know what character set the terminal supports, but they still
> match correctly.]

Okay, one difference was that I wasn't running emacs in terminal mode. 
However, I tried your example which worked and then reverted to my 
normal configuration and now that seems to be working too.  So this 
really got me worried that I was just doing something really silly. 
However, if I start a fresh buffer and then use X11 "cut and paste" to 
copy ⟨   ⟩ into the buffer (instead of reading it from a file) it 
doesn't work.  If I am editing a file that I've opened that already 
contains ⟨   ⟩ "cut and paste" a second pair, those match correctly as 
well.  Alternately, if I first "cut and paste" and then use insert-file, 
matching behaves incorrectly.  So I'm sure whether this is a 
configuration error on my part, or some bugginess regarding interaction 
with the X server.  I was pretty sure that I emacs configured to use the 
correct encoding to start with

set-language-environment "utf-8")
(set-keyboard-coding-system 'utf-8)
(set-terminal-coding-system 'utf-8)
(prefer-coding-system 'utf-8)

I just checked and when opening a file with the pair of delimiters, 
describe-coding-system says

Coding system for saving this buffer:
   U -- utf-8-unix (alias: mule-utf-8-unix)

Default coding system (for new files):
   U -- utf-8 (alias: mule-utf-8)

Coding system for keyboard input:
   U -- utf-8 (alias: mule-utf-8)

Coding system for terminal output:
   U -- utf-8 (alias: mule-utf-8)

Coding system for inter-client cut and paste:
   x -- compound-text-with-extensions (alias: x-ctext-with-extensions 
ctext-with-extensions)

Defaults for subprocess I/O:
   decoding: U -- utf-8-unix (alias: mule-utf-8-unix)

   encoding: U -- utf-8-unix (alias: mule-utf-8-unix)

whereas when I open a fresh buffer I get

Coding system for saving this buffer:
   Not set locally, use the default.
Default coding system (for new files):
   U -- utf-8 (alias: mule-utf-8)

Coding system for keyboard input:
   U -- utf-8 (alias: mule-utf-8)

Coding system for terminal output:
   U -- utf-8 (alias: mule-utf-8)

Coding system for inter-client cut and paste:
   x -- compound-text-with-extensions (alias: x-ctext-with-extensions 
ctext-with-extensions)

Defaults for subprocess I/O:
   decoding: U -- utf-8-unix (alias: mule-utf-8-unix)

   encoding: U -- utf-8-unix (alias: mule-utf-8-unix)


If I change my .emacs so that it has

(prefer-coding-system 'utf-8-unix)

describe-coding-system reports both cases as identical to the first I 
quoted above.  However, the behavior for working with a fresh buffer 
versus and opened file remains the same.