Re: [NTG-context] Luatex (actually Aleph) and Bidi_Mirrored chars in RTL mode

if for instance ( ) are officially not symbols but open/close thingies, then we need to deal with them

Yes, they are. That's what the Bidi_Mirrored property is for.

(although i then wonder why we have no proper open/close code point for them instead of reusing the ascii ()

If anything, for backward compatibility. Arthur