Hi there, following up to my earlier post, I have written a syntax expansion facility for lua. I have made it available at http://www.tset.de/lua_syntax_rules.zip In order to use it you will need lhf's experimental token filter patch, available here: http://www.tecgraf.puc-rio.br/~lhf/tmp/macros.tar.gz Please be aware that this is experimental code as well. I only make it available in order to receive feedback from those interested in adding new syntactic constructs to lua. So please feed me back :-) To those wishing to actually change luas syntax: this is not the tool for you. Sorry. Gunnar