Lexical binding in GNU Emacs - source of problem for XEmacs!?

Hi, When trying to sync a file to XEmacs I stumbled on that GNU Emacs since version 24.1 (June 10, 2012) has support for lexical binding. We seem to have some support for lexical binding (lexical-let) but that is about it. Anyone who has had a look at how much effort it would take to implement lexical binding? I guess my immediate sync problems can probably be solved by going back before the 21.4 release but I fear this will potentially be a major incompatibility problem for us? Yours -- %% Mats _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://lists.xemacs.org/mailman/listinfo/xemacs-beta