Subject: Re: E-lisp primitives unextendible [was: Lisp versus C++ for AI. software] From: Erik Naggum <firstname.lastname@example.org> Date: 1996/11/01 Newsgroups: comp.lang.lisp,comp.lang.c++,comp.emacs Message-ID: <email@example.com> * Bill Dubuque <firstname.lastname@example.org> | The C-implemented e-lisp primitives are certainly not 100% compatible | with those implemented in e-lisp. For example, one cannot advise (or | redefine) them because there is often C-level calls to such primitives | and such C-level calls do not call indirectly through the symbol-function | cell. Such "hardcoded" calls make it extremely difficult to implement | extensions to Emacs (witness the convoluted code due to loops that had to | be jumped through to do things like ange-ftp, etc). FWIW, there is also the byte code machine, which performs a number of operations directly without calling any functions. #\Erik -- Those who do not know Lisp are doomed to reimplement it.