Tiddlylisp is a toy Lisp interpreter, written in Python, and intended to accompany the essay Lisp as the Maxwell's equations of software.
The repository contains the following files:
tiddlylisp.py: A simple interpreter for a subset of Lisp.
Tiddlylisp is adapted from and closely based on Peter Norvig's
tiddlyvau.py: A modification of the interpreter that uses vau expressions to move all built-in functions and syntactic forms out of the eval function.
tiddlyparser.py: A shared module for parsing s-expressions.
sqrt.tl: An example tiddlylisp program, for computing square roots.
Adapted from an example in the book
The Structure and Interpretation of Computer Programs,
by Harold Abelson and Gerald Jay Sussman with Julie Sussmann.
eval.tl: A tiddylisp program defining a function
eval which can
evaluate any Lisp expression, albeit, for an even smaller subset of
Lisp than tiddlylisp. Based on the
LISP 1.5 Programmer's Manual
and the essay
The Roots of Lisp
(postscript) by Paul Graham.
See the essay for more details.