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> you can't use regular if/while/for with async What do you mean by this? You can certainly mix if/while/for freely with .await, that's the whole reason it exi

• bobbylarrybobby 3y ago
  I believe the distinction is that in rust, `if a_cond.await` can only be written in an async function, whereas Haskell’s `ifM` takes a `Monad Bool` (and async is a kind of monad) as its condition and therefore can be written anywhere, not just within an existing monad.
  • Rusky 3y ago
    That's a distinction without a difference. `ifM` takes a monadic bool but it also returns a monadic value, in exactly the same way that `.await` can only be done within an async computation.
• lmm 3y ago
  Sorry, yes, what I meant was you can use builtin if/while/for, but they're magic special cases that you can't reuse. E.g. if you have a repeated snippet of code that uses if/while/for, you might have exactly the same code in one async and one regular function, but you can't factor it out into a shared helper function (you can write the async and the non-async version of that helper function, but you can't write one that does both).