rune

An embeddable dynamic programming language for Rust.

Contributing

If you want to help out, there should be a number of optimization tasks available in Future Optimizations. Or have a look at [Open Issues].

Create an issue about the optimization you want to work on and communicate that you are working on it.

Highlights of Rune

• Clean Rust integration 💻.
• Memory safe through reference counting 📖.
• Template literals 📖.
• Try operators 📖.
• Pattern matching 📖.
• Structs and enums 📖 with associated data and functions.
• Dynamic vectors 📖, objects 📖, and tuples 📖 with built-in serde support 💻.
• First-class async support 📖.
• Generators 📖.
• Dynamic instance functions 📖.
• Stack isolation 📖 between function calls.
• Stack-based C FFI, like Lua's (TBD).

Rune scripts

You can run Rune programs with the bundled CLI:

cargo run --bin rune -- run scripts/hello_world.rn

If you want to see detailed diagnostics of your program while it's running, you can use:

cargo run --bin rune -- run scripts/hello_world.rn --dump-unit --trace --dump-vm

See --help for more information.

Running scripts from Rust

You can find more examples [in the examples folder].

The following is a complete example, including rich diagnostics using [termcolor]. It can be made much simpler if this is not needed.

```rust use rune::{Context, Diagnostics, FromValue, Source, Sources, Vm}; use rune::termcolor::{ColorChoice, StandardStream}; use std::sync::Arc;

[tokio::main]

async fn main() -> rune::Result<()> { let context = Context::withdefaultmodules()?; let runtime = Arc::new(context.runtime());

let mut sources = Sources::new();
sources.insert(Source::new(
    "script",
    r#"
    pub fn add(a, b) {
        a + b
    }
    "#,
));

let mut diagnostics = Diagnostics::new();

let result = rune::prepare(&mut sources)
    .with_context(&context)
    .with_diagnostics(&mut diagnostics)
    .build();

if !diagnostics.is_empty() {
    let mut writer = StandardStream::stderr(ColorChoice::Always);
    diagnostics.emit(&mut writer, &sources)?;
}

let unit = result?;
let mut vm = Vm::new(runtime, Arc::new(unit));

let output = vm.call(&["add"], (10i64, 20i64))?;
let output = i64::from_value(output)?;

println!("{}", output);
Ok(())

} ```