Re: strange behavior of @ in tag searches

[Ihor Radchenko]

"Victor A. Stoichita" <victor@svictor.net> writes:

> I modify the syntax table for text modes to handle the meaning of 
> some characters in French. In fact, te actual modification doesn’t 
> seem to matter. The following is enough to trigger the described 
> behavior:
>
> --8<---------------cut here---------------start------------->8---
> (add-hook 'text-mode-hook (lambda ()
>    (set-syntax-table (make-syntax-table))))
> --8<---------------cut here---------------end--------------->8---

That basically clears _all_ syntax settings in org-mode. It would
interfere with pretty much any major mode that modifies syntax tables...
A better way to modify syntax table is using modify-syntax-entry or you
need to make sure that your code inherits org-mode-syntax-table instead
of creating an empty table.

I just searched through org code and the following syntax table elements
are being used by org:

-*- mode: helm-grep -*-

AG Results for `modify-syntax-entry':

org-element.el:380:    (modify-syntax-entry ?\( "()" table)
org-element.el:381:    (modify-syntax-entry ?\) ")(" table)
org-element.el:383:      (modify-syntax-entry char " " table)))
org-element.el:389:    (modify-syntax-entry ?\[ "(]" table)
org-element.el:390:    (modify-syntax-entry ?\] ")[" table)
org-element.el:392:      (modify-syntax-entry char " " table)))
org-element.el:398:    (modify-syntax-entry ?\{ "(}" table)
org-element.el:399:    (modify-syntax-entry ?\} "){" table)
org-element.el:401:      (modify-syntax-entry char " " table)))
ox.el:6870:     (modify-syntax-entry ?\[ "w"))
org.el:4719:  (modify-syntax-entry ?\" "\"")
org.el:4720:  (modify-syntax-entry ?\\ "_")
org.el:4721:  (modify-syntax-entry ?~ "_")
org.el:4722:  (modify-syntax-entry ?< "(>")
org.el:4723:  (modify-syntax-entry ?> ")<")
org.el:4838:      (modify-syntax-entry (string-to-char (car c)) "w p" st))))
org.el:10927:   (modify-syntax-entry ?@ "w" tag-syntax)
org.el:10928:   (modify-syntax-entry ?_ "w" tag-syntax)

The last two refer to tag groups.

> For now, I changed my tags to not use @ any more.
> Are there other aspects that I might miss if I alter the syntax 
> table on ’text-mode-hook?

I hope the above helps.

Best,
Ihor