This project shows a toy async-await executor written from scratch for web assembly. The goal is to make this real and see output:
pub fn main() -> () {
Executor::spawn(async {
say_num(1);
sleep(1000).await;
say_num(2);
sleep(1000).await;
say_num(3);
});
}See it working here
This library only uses once_cell for global state and woke for waker creation (because the pointer magic for that is crazy).
Warning: this project builds only with Rust 1.39 and above
Limitations: this executor can only run a single top level future (i.e. no multiple spawns), management of timeout does not scale. Don't use this code for production, use it to learn!