4 ms·

Now if only python would do the same.

• iikoolpp 7y ago
  Impossible due to how async is implemented (as generators).
  • pitaj 7y ago
    JS async is implemented as generators as well AFAIK
    • dlbucci 7y ago
      Not unless promises are implemented with generators. I dunno though, I feel like there's some overlap between the two concepts, so maybe they are?
      • pitaj 7y ago
        Promises are just objects which represent an asynchronous value. Async/await are coroutines: they have a shared context, stack, etc. They can be paused and resumed. The implementation of async/await depends on the engine, but I'm pretty sure they use the same generator backend. Babel and other transpilers convert async functions actual generator functions. By contrast, promises are a fairly simple runtime library.
    • Scooty 7y ago
      I'm not sure how they're handled internally, but async functions are no longer generators. For a while after generators and before async/await, generators were used as a polyfill.
      • pitaj 7y ago
        Because of how similar they are, it would make sense to implement async/await using existing generator backends in the VM, right?
• xtreak29 7y ago
  Top level awaits are allowed with a compiler flag now in Python 3.8 : https://bugs.python.org/issue34616 https://bugs.python.org/issue34616 python -m asyncio Starts a new repl with the compiler flag to explore top level await in a repl
  • deleted 7y ago
    [deleted]