Le Mon, Nov 14, 2005 at 06:57:09PM +0100, Joachim Schrod:
> 
> Which of those do you want to keep? There are good arguments for all
> of them.

This is why, in my opinion, two tools are usefull:
- a "token look ahead"
- a "node look backward"

The two opposites are meaningless, as far as I understand the working of
TeX.

The real difficulties come from having the right kind of registers for
every kind of node. A workaround can be to use hbox for everything not
yet implemented in registers, I don't know if it is the good solution.
At least it sounds feasible easily, which is a great quality.

Regards,

	Benjamin.