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Comment by lalaithion | Hacker News Reader

It should be possible to have a platform that has a mutable reference with an API like this:

    main = 
        x = pf.NewRef!
        pf.Write! x 5
        y = pf.Read! x

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Haskell:

    import Data.IORef
    
    main :: IO ()
    main = do
      x <- newIORef (0 :: Int)
      writeIORef x 5
      y <- readIORef x
      print y

That's right, although the Rust equivalent of that would be more like `Future<Arc<Mutex<RefCell<T>>>>` than `Arc<Mutex<RefCell<T>>>` - so the ergonomics would be a bit different!

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