emacs 0.5.1

Rust library for creating emacs modules

Emacs Module in Rust crates.io doc.rs Build Status

User Guide | Example

This provides a high-level binding to emacs-module. Code for a minimal module looks like this:

extern crate libc;
extern crate emacs;

use emacs::{Env, CallEnv, Result, Value};


fn init(env: &Env) -> Result<Value> {
    fn hello(env: &CallEnv) -> Result<Value> {
        let name: String = env.parse_arg(0)?;
        env.message(&format!("Hello, {}!", name))

    emacs_export_functions! {
        env, "greeting-", {
            "say-hello" => (hello, 1..1)

(require 'greeting)
(greeting-say-hello "Emacs")

Live Reloading

Emacs does not support unloading modules. Live reloading thus requires a custom module loader. rs-module is one such loader (which itself is a module that must be loaded by Emacs's normal loading mechanism). See load.sh.

Sample Modules

test-module uses most of the provided features.


  • Building:
    cargo build --all
  • Testing:
  • Continuous testing (requires cargo-watch):
    cargo watch -x 'build --all' -s bin/test.sh