wasmgc

Garbage-collected structs and arrays for Rust on WebAssembly.

use wasmgc::{Gc, wasmgc};

#[wasmgc]
struct Counter {
    value: i32,
}

fn example() {
    let counter = Gc::new(Counter { value: 1 });
    let shared = counter.clone();

    shared.set_value(2);
    assert_eq!(counter.value(), 2);
}

Cloning a Gc shares the same object. The engine collects unreachable objects, including cycles.

See the guide for building, Rust APIs, and host interoperability. Requires a WasmGC-capable engine and postprocessing with wasmgc.

Examples · Benchmarks