The Light Lisp programming language

Simply the best lisp dialect (at least from these written in Rust).

How to compile Light Lisp from source

Only requirements are Git and Rust

    git clone https://github.com/luki446/lightlisp
    cd lightlisp
    cargo build --release

To run example

    ./target/release/llisp ./examples/simple_addition.ll

Or REPL mode

    ./target/release/llisp

Usage

llisp 0.1.0
made by luki446<luki446@gmail.com>
Simple Light Lisp interpreter

USAGE:
    llisp.exe [FLAGS] [FILE]

FLAGS:
    -a, --ast        Activate Abstract Syntax Tree printing
    -h, --help       Prints help information
    -V, --version    Prints version information

ARGS:
    <FILE>    File name to execute

Learn Light Lisp in few (thousand) minutes

Run program without arguments to enter REPL mode.

cargo run
# or
./llisp

Types

In Light Lisp there are few value types

Unsigned integer type (64-bits) ex. 123, -21
Boolean value: true, false
Nil value (kind of null)
And list of these types ( 123 true -1 nil)
(new coming soon)

Syntax

Practically everything is a function (even if statement or mathematical operations). Function call construction goes like this

(<function_name> <function_arg_1> <function_arg_2> ...)

Light Lisp simplify using results of function as argument to other function.

(<function_name> (<function_name_2> ...) ...)

Basic things

How to do basic math:

>>> (+ 1 2 3)
6
>>> (- 9 6 2)
1
>>> (* 2 2 2)
8
>>> (/ 16 4)
4

Comparitions and logical operations:

equal

>>> (= 1 1 1) 
true

not equal

>>> (<> 1 2 3) 
true

less then (pretty cool for checking if value is in range from X yo Y)

>>> (< 1 2 3)
true

less then or equal

>>> (< 1 2 3)
true

greater then

>>> (> 3 2 1)
true

greater then or equal

>>> (>= 3 2 1)
true

logical and

>>> (&& true true)
true

logical or

>>> (|| false true)
true

If statement have this form (for this if everything except nil and false is true)

(if <value> <true_branch> <false_branch>)

For example

>>> (if (< 1 5 10) 1 -1)
1

New features coming soon