5 ms·

It does automatically start the tasks. JavaScript asyncs are "hot". You can simulate "cold" asyncs using a function, as you describe, but in other languages thi

• nwienert 7y ago
  I’m not sure exactly what hot is here, but if that’s the case then all javascript functions are hot. It’s behaving consistently with any other function. I assume the point here is that Rust in this case changes the way function calls work based on async, which is, well, inconsistent.
  • int_19h 7y ago
    An async function immediately returns a Future to the caller, so in that sense it is fully consistent with a sync function that immediately returns a value. If you want the asynchronously computed value, then the async equivalent to "foo()" is "foo().await", and that is also fully consistent - the function body starts running, and returns the value once it's done. But there's no sync equivalent of invoking an async function without awaiting it, which is where the hot/cold distinction manifests. Thus, there's no inconsistency, because there's nothing to be consistent with.