On Thu, 2023-01-26 at 23:07 +0100, Hans Hagen via ntg-context wrote: > On 1/26/2023 9:33 PM, Henri Menke via ntg-context wrote: > > \directlua{ > > userdata = userdata or {} > > function userdata.test() > > tex.print("\string\\numexpr 17\string\\relax") > > end > > } > > > > \tt > > \protected\def\test{\directlua{userdata.test()}} > > \meaning\test\par > > \edef\x{\test}\meaning\x\par > > \the\test > > > > \directlua{ > > local t = lua.get_functions_table() > > t[\string#t + 1] = userdata.test > > token.set_lua("test", userdata.test, \string#t, "protected") > > } > > \meaning\test\par > > \edef\x{\test}\meaning\x\par > > \the\test > from the code it looks like we're talking plain luatex ... > > \the is very selective and doesn't work for all primitives or macros > > compare it to \number which accepts any number representation > following > it while \the doesn't work ok 123 > > that said, your set_lua is wrong and passes a function as well as an > index > > \directlua{ > lua.get_functions_table()[999] = function() > tex.print("\string\\numexpr 17\string\\relax") > end > token.set_lua("test", 999) > } > > \the \test % needs the \numexpr > > \number \test % doesn't > > \count0 \test % needs the \numexpr > > \count0=\test % doesn't > > etc
Thanks for pointing out my mistake. Your example works fine but now the luacall is no longer protected and will therefore fully expand in \edef. So do I understand this correctly that there is no way to make the second \the\test work? \directlua{ lua.get_functions_table()[999] = function() tex.pri nt("\string\\numexpr 17\string\\relax") end } \tt \directlua{token.set_lua("test", 999)} \meaning\test\par % expandable luacall 999 \edef\x{\test}\meaning\x\par % macro:->\numexpr 17\relax \the\test % 17 \directlua{token.set_lua("test", 999, "protected")} \meaning\test\par % luacall 999 \edef\x{\test}\meaning\x\par % macro:->\test \the\test % ! You can't use `luacall 999' after \the. \bye Cheers, Henri > > Hans > > > ----------------------------------------------------------------- > Hans Hagen | PRAGMA ADE > Ridderstraat 27 | 8061 GH Hasselt | The Netherlands > tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl > ----------------------------------------------------------------- > > _____________________________________________________________________ > ______________ > If your question is of interest to others as well, please add an > entry to the Wiki! > > maillist : ntg-context@ntg.nl / > https://www.ntg.nl/mailman/listinfo/ntg-context > webpage : https://www.pragma-ade.nl / http://context.aanhet.net > archive : https://bitbucket.org/phg/context-mirror/commits/ > wiki : https://contextgarden.net > _____________________________________________________________________ > ______________ ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___________________________________________________________________________________