I wonder at what time TeX's input routeine transforms "incoming chars" into
tokens. This obviously is not something like a preprocessing phase, since
this would not allow for catcode changes.

Would the proper model be some combination of a token queue and a char
queue, input reads from the token queue, and whenever this is empty, one
new token is created from the char queue? Macro expansion could then,
of course, lead to token lists longer than one item...

Andre'

-- 
André Pönitz ............................................. [EMAIL PROTECTED]

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