Rust’s async isn’t colored

Re:Rust’s async isn’t colored by resonantjacket5 on Thursday March 11, 2021 @01:43PM (#26427435)

You can technically wrap the promise and spin lock on it till it resolves. Aka forcibly wait on an async function in a sync function. There are some npm libraries that provide it. I've used a couple times (for some hacky scripts), though obviously don't use it in the browser.

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Re:Rust’s async isn’t colored by pitaj on Thursday March 11, 2021 @03:23PM (#26428569)

AFAIK, you can't do this from JS, you have to have some engine integration, as the busy loop in JS will prevent the event loop from working.

For instance, this will essentially halt your runtime:

    let y;
    Promise.resolve(123).then(x => { y = x; });

    while (!y) {}
    console.log(y)

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Re:Rust’s async isn’t colored by lhorie on Thursday March 11, 2021 @04:08PM (#26429021)

Yes, deasync[0] for example, hooks into the Node.js event loop from c++ land

[0] https://www.npmjs.com/package/deasync

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