Hans Hagen wrote: > Marcin Borkowski wrote: >> Hello! >> >> I was just wondering, whether something like this is possible in luatex >> - and if not, if it might be implemented;). I'd like to be able to >> transform somehow the input right *before* TeX sees it. What I mean is >> e.g. a transformation using regexps. Application I have in mind is as >> follows: in Polish, there are a few prepositions which are one-letter >> words; it's a bad custom to leave them hanging at the end of a line. >> Such an option could automatically put ties (~) instead of spaces after >> them - a feature sometimes requested by Polish TeX users. > > input parsing is not needed here, it's easier to to do this on the node > list; remind me in a few months (it's rather trivial to implmenent since > the infrastructure is already in mkiv)
Hans is right, the node list should be altered instead of the input, because you can never be sure that "\TEX\ i \METAFONT\" is not hidden inside a definition somewhere. There actually is a way to modify the input lines just before they are parsed by luatex, but that is really only suitable for converting 8-bit encodings to utf-8. (I was going to post an example abusing that method, but there are way many things that can go wrong, so I changed my mind) Best wishes, Taco ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________
