How to write a good REPL

[porky11]

I want to have a REPL like the one in clisp, that I can call as a function myself.

Where do I get lisp code of such a REPL that I can modify etc. ?

[Goheeca]

Here is a source of clisp REPL: http://clisp.cvs.sourceforge.net/viewvc/clisp/clisp/src/reploop.lisp. Usually it's very entangled with low-level implementation-dependent functions of the given CL implementation. I've been playing with ABCL in the same manner to make it run as an applet and it's not easy to create a proper REPL, but when I've found out there exist issues with the java security policy my enthusiasm dropped.