26 releases (15 breaking)
0.17.0 | Feb 25, 2024 |
---|---|
0.15.0 | Feb 3, 2024 |
0.14.0 | Dec 3, 2023 |
0.13.1 | Nov 27, 2023 |
0.5.0 | Oct 15, 2022 |
#178 in Configuration
568 downloads per month
180KB
4.5K
SLoC
Tulisp
Tulisp is a Lisp interpreter that can be embedded into Rust programs. The syntax tries to closely match that of Emacs Lisp. It was primarily designed to be a configuration language, but it also works well as a general purpose embedded scripting language.
One of the many benefits of using the Emacs Lisp syntax is that we can reuse its documentation for the builtin functions and macros. And for people who are already familiar with Emacs Lisp, there's no need to learn an extra language.
Getting started
Tulisp requires rustc
version 1.70 or higher.
It is very easy to get started. Here's an example:
use tulisp::{TulispContext, tulisp_fn, Error};
fn main() -> Result<(), Error> {
// Create a new Tulisp execution context.
let mut ctx = TulispContext::new();
// Add a function called `add_nums` to `ctx`.
#[tulisp_fn(add_func = "ctx")]
fn add_nums(num1: i64, num2: i64) -> i64 {
num1 + num2
}
// Write a lisp program that calls `add_nums`
let program = "(add_nums 10 20)";
// Evaluate the program, and save the result.
let sum: i64 = ctx.eval_string(program)?.try_into()?;
assert_eq!(sum, 30);
Ok(())
}
Features
defun
s,defmacro
s andlambda
sintern
to find/create symbols dynamically- Backquote/Unquote forms (for example
`(answer . ,(+ 2 3))
) - Threading macros (
thread-first
andthread-last
) - Methods for reading from alists and plists
- Lexical scopes and lexical binding
- Tailcall Optimization
- Proc macros for exposing rust functions to tulisp
- Decl macros for creating lists and destructuring lists quickly.
- Easy to use interpreter and objects
- Backtraces for errors
Performance
Tulisp has a light-weight tree-walking interpreter with very low startup times and sufficient speed for many config/simulation needs.
Builtin functions
A list of currently available builtin functions can be found here.
Dependencies
~1.5MB
~37K SLoC