Hi, Code highlighting (for PDF output) is a problem with partial solutions in LaTeX world. This 7 years old question on tex.sx
https://tex.stackexchange.com/questions/153896/has-the-time-come-for-a-latex3-successor-to-listings has interesting quality answers and remain relevant. Accidentally hitting it today, I learn about very recent new LaTeX package https://ctan.org/pkg/codehigh, currently apparently covering highlighting of latex code itself (latex2 or latex3) in pdf output. This leds me to wonder if a poor man solution is feasible which would rely on Emacs own fontlocking support: i.e. is it feasible to add an "export to LaTeX mark-up" feature to convert the produced (internal to Emacs eLisp) mode-dependent highlight into LaTeX (or Plain TeX) mark-up? One could also imagine that some eLisp function would take a region and a language from a TeX buffer and insert underneath it LaTeX-formatted (or Plain TeX-formatted) mark-up. The original could be enclosed in a comment environment or other means to let it be ignored by LaTeX compiling itself. (I sort of remember "comment" package creates external files but one can create easily an alternative "ignore" environment if desired, \iffalse...\fi method being the simplest one which however is dangerous is enclosed code to ignore is (La)TeX, but one can produce completely safe solutions) Perhaps something like this already exists? If not, its installment would reinforce domination of Emacs eLisp on the world at large as collaborative projects would have to impose on all participants not only a code of conduct but also the mandatory usage of Emacs for text editing. Best, Jean-François
