On 2/10/2016 11:43 PM, David Carlisle wrote:
Comparing the list of callbacks in luatex 0.89 to those in 0.80 the
changes seem to be
- append_to_vlist_filter
that one was missing indeed
- hpack_quality
part of the interceptors (overful rule stuff)
- process_rule
handy in case one implements user rules
- show_warning_message
just one of interceptors (we normalized all warnings/errors but there is
still some work todo)
Gone
- pdf_stream_filter_callback
that one never did anything and was a left-over from an experiment
- token_filter
There is no replacement for the callback. The new token scanner permits
defining new functionality that needs some kind of parsing (like picking
up a dimension or count) and acting on that but picking up and feeding
back into the input stream of pure tokens has been removed.
we might add a token.print function (if so it will be around version
0.95) in which case one can use token.get_tok in an endless loop to pick
up tokens and print them back but (as with the callback) it will be very
inefficient
the first three new ones are documented in the manual but not
show_warning_message
the two that have gone are not documented anywhere as a change that I can find.
because the first one never was there (there is some more undocumented
stuff in there, which might become formal when we release 0.90 in which
case it will be documented - the next tugboat might have some more info
about that)
This came up as a user query about some old code of Taco's on
stackexchange using token_filter
http://tex.stackexchange.com/a/21691/1090
What is the intended replacement for token_filter?
none, the new scanner is intended for implementing interfaces (and maybe
introspection) but not for manipulating the input stream
Hans
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