I've found *4* C parsers in Emacs! Eg funcs: https://github.com/emacs-mirror/emacs/blob/c7bef6a4f033fa6b22906de0be6da54958d5b3c3/lisp/progmodes/cc-engine.el#L10092 https://github.com/emacs-mirror/emacs/blob/bc96f6e827ba079006ae87914395942fc79f3f26/admin/grammars/c.by#L787 https://github.com/emacs-mirror/emacs/blob/bc96f6e827ba079006ae87914395942fc79f3f26/lib-src/etags.c#L3857 https://github.com/emacs-mirror/emacs/blob/c7bef6a4f033fa6b22906de0be6da54958d5b3c3/lib-src/ebrowse.c#L3136