> I'll look into writing a concrete proposal for *at in guile. > I'll post a link to the guile mailing list message when it has > been composed and sent. Here it is: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=46258 I'm not familiar with guile's code base and conventions and my TODO list is ever-growing, so it could take quite some time before I get around writing a patch to Guile. (Or implementing it in pure Scheme + FFI bindings as a separate library). Greetings, Maxime.