+1 char strings as open-bracket/close-bracket

+1 char strings as open-bracket/close-bracket

[Kokor Hekkus]

Any way of modifying the syntax table to identify a string of more
than one character as an open-bracket or a close-bracket character.
For instance, you might do:

     (modify-syntax-entry ?^ "($")
     (modify-syntax-entry ?$ ")^")

...to make ^ and $ match each other (from EmacsWiki).  How would I
make the two character strings '#>' and '<#' match in the same way?
The above doesn't work.

Thanks!

Re: +1 char strings as open-bracket/close-bracket

[Joost Kremers]

Kokor Hekkus wrote:
> Any way of modifying the syntax table to identify a string of more
> than one character as an open-bracket or a close-bracket character.
> For instance, you might do:
>
>      (modify-syntax-entry ?^ "($")
>      (modify-syntax-entry ?$ ")^")
>
> ...to make ^ and $ match each other (from EmacsWiki).  How would I
> make the two character strings '#>' and '<#' match in the same way?
> The above doesn't work.

if i do C-h f modify-syntax-entry RET, somewhere in the help buffer, it
says:

"Only single-character comment start and end sequences are represented thus.
Two-character sequences are represented as described below."

i guess that would be a starting point for you to look at.


-- 
Joost Kremers                                      joostkremers@yahoo.com
Selbst in die Unterwelt dringt durch Spalten Licht
EN:SiS(9)

Re: +1 char strings as open-bracket/close-bracket

[Andreas Röhler]

Kokor Hekkus wrote:
> Any way of modifying the syntax table to identify a string of more
> than one character as an open-bracket or a close-bracket character.
> For instance, you might do:
>
>      (modify-syntax-entry ?^ "($")
>      (modify-syntax-entry ?$ ")^")
>
> ...to make ^ and $ match each other (from EmacsWiki).  How would I
> make the two character strings '#>' and '<#' match in the same way?
>   

AFAIU relying on syntax-tables will fail if constructs are nested.

In this case have a look at beg-end.el and thingatpt-utils-base.el at

https://code.launchpad.net/s-x-emacs-werkstatt/

There detecting nested comments for example is realised that way:

(put 'comment 'beginning-op-at
     (lambda ()
       (if (string= "" comment-end)
           (beginning-of-form-base comment-start comment-end
(line-beginning-position) t nil t)
         (beginning-of-form-base  comment-end nil t nil t))))

(put 'comment 'end-op-at
     (lambda ()
       (if (string= "" comment-end)
           (when (looking-at comment-start)
             (end-of-line))
         (end-of-form-base comment-start comment-end nil t nil t))))

Replace comment-start/end here by your form,
write "(put 'MY-Form... " it should work.

Afterwards you may define a jump-function similar to match-paren.

HTH

Andreas






> The above doesn't work.
>
> Thanks!
>
>