[Haskell-cafe] "back doors" into the IO monad

[Manlio Perillo]

Hi.

What are the available methods to execute IO actions from pure code?

I know only unsafePerformIO and foreign import (to call a non pure
foreign function).


Assuming I want to execute external untrusted code using plugins (via
the `plugins` package), is it possible to completely forbid execution of
IO actions from user code?



Thanks   Manlio