hasp

How to run

You need Stack to run this project.

You can then start a repl with by running the following command in the root directory: stack build && stack exec hasp

Functionality

Hasp has the following builtin words:

• basic operators: + - *
• boolean operators: and or
• mathematical comparison operators: < > ==
• list functions: list empty? cons car cdr
• program control functions: if begin define let lambda

Hasp support integers, strings, boolean, functions, and lists.

Here are some valid programs and their output:

program	output
(+ 1 2)	3
(+ 1 2 3)	6
(* 1 2)	2
(* 1 2 3)	6
(- 2 2)	0
(list 1 2 3)	[1,2,3]
(empty? (list 1 2 3))	False
(car (list 1 2 3))	1
(cdr (list 1 2 3))	[2,3]
(cons 1 (list 2 3))	[1,2,3]
(if true 1 2)	1
(begin (+ 1 2) (== false false))	True
(begin (define foo (x) (+ x 1)) (foo 5)	6
(begin (define foo 3) foo	3
(let (x 1 y 2) (+ x y))	3
((lambda (x) (+ 1 x)) 10)	11