On 5/7/2013 1:13 PM, David Kastrup wrote:
Hi,
at the recent BachoTeX conference, I held a talk comparing LuaTeX and LilyPond integration of their respective extension languages. Now the talk slot was just 30 minutes, so the talk was quite more condensed than the proceedings, and I probably would have had to take the laptop away from Hans to have the talk make much of an impression anyway (not that there would have been much of a talk if people had locked _my_ laptop away in the days before it) and that still would not have given me a hook into Taco who had to miss out on BachoTeX because of anniversative conditions.
So I am instead dumping the PDF of the proceedings on this list as it may inspire people to try working on some more user-manageable low-level interaction between Lua and TeX than the current situation provides. I've added some rough sketches at the end of the article that should make clear why this can't be done in formats alone but will require primitive support as well if things are supposed to turn out nicely.
Hope you can make something of it.
in cases where you use tex as processsing engine one can avoid most tex and especially nasty parsing by just keeping the tricky stuff at the lua end or in the case of lilypond at the lisp end: just avoid parsing at the tex end and spit out predictable tex code ... no user is going to see it i'm not so sure if messing with the input parser helps out ... and any special treatment of for instance \directlua's argument would slow down and for sure break already present code; there are some helpers (like \luaescapestring) and one can do catcode juggling as well as detokenize but in the end, \directlua is just a predictable simple and efficient interface another option is to parse the input files (after all there is a callback for it) and do some preprocessing at some point taco and i discussed a tex primitive that would sort of map more directly onto a function for instance by (optionally) avoiding tokenization (if possible) but it's all very low priority stuff compared to other pending (opening up) issues and more something for > 1.00 Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------