Lispy
Project from the website Build your own Lisp.
What is Lispy ?
Lispy is a small Lisp-like programming language written in C, using mpc library to parse the input easily.
What are Lispy's features ?
Lispy supports all the basic features that you would expect from a programming language, like :
- Variables
- Functions
- Conditionals
- Error handling
- Standard library
- etc.
But, there is more to it :
- S-Expression : symbolic-expression is a list of one or more expressions (number, string, symbol, etc.).
- Q-Expression : quoted-expression is a list of one or more expressions that are not evaluated during process but instead left exactly as they were typed in.
Examples of programs written in Lispy
Hello World! :
("Hello World!")Fibonacci function :
(fun {fib n} {
select
{ (== n 0) 0 }
{ (== n 1) 1 }
{ otherwise (+ (fib (- n 1)) (fib (- n 2))) }
})Factorial function :
(fun {fac n} {
select
{ (== n 0) 1 }
{ otherwise (* (n) (fac(- n 1)))}
})