lisp-ts

Tiny Lisp interpreter. written in TypeScript.

Setup

• set node version: 16 >=
• npm install for install dependencies
• npm start for run repl

REPL

basic operations

  lisp-ts> (+ 1 (- 2 (* 3 (/ 4))))
  -9

  lisp-ts> (&& (|| false true) (> 1 0))
  true

setq

  lisp-ts> (setq x 5)
  true

  lisp-ts> x
  5

  lisp-ts> (+ x x)
  10

defun

  lisp-ts> (defun fn (x) (* x x))
  true

  lisp-ts> (fn 2)
  4

recursive function

  lisp-ts> (defun fact (n) (if (== n 0) 1 (* n (fact (- n 1)))))
  true

  lisp-ts> (fact 5)
  120

Todo

• add environment scope

Respect

Create interpreter is one of awesome experience in my programming life.
thanks for next articles and all lisp programmers.

• Land of Lisp [book]
• Little Lisp interpreter - Mary Rose Cook
• kanaka/mal - mal - Make a Lisp
• Indy9000/lisper - Lisp Parser Interpreter written in TypeScript
• (How to Write a (Lisp) Interpreter (in Python))
  • and translated article ((Python で) 書く (Lisp) インタプリタ)
• JavaScript で Web ブラウザ版 LISP 処理系を作ってみた
• JavaScript の ES2015 を使ったら Lisp を 100 行未満で実装できた