a kit for building one's own custom Lisp implementation 1) LispKernel, a minimal Lisp-2 interpreter with- dynamic scoping- all fundamental special forms: let, setq, and, or, if, defun, defmacro ...- 100+ basic functions: list, car, funcall, null ...- catch/throw, unwind-protect- a GUI 2) SLisp, an experimental Lisp dialect tightly integrated with Smalltalk 3) ULisp, a Scheme implementationusage: by subclassing LispKernel one can implement a custom dialect of Lisp.see SLisp, CLisp and ULisp as examples LispKernel is implemented as a pure Smalltalk extension: there is no parser nor compiler.Lisp code can be written as plain Smalltalk arrays. advantages:- we have a tight integration between Lisp and Smalltalk- chasing the reference to a symbol can be done via alt-n- we can use the debugger to debug Lisp code- even continuations become easy to implement (see ULisp) ... see LispKernel class (and subclasses) comments for more