Roc doesn't allow side effects. All effects are wrapped and returned from a function. So this is just as pure as haskell. Though it may not be exposed in the sa

Roc doesn't allow side effects. All effects are wrapped and returned from a function. So this is just as pure as haskell. Though it may not be exposed in the same way as haskell, effects still boil down to something akin to monads and callbacks.