Re: [Haskell-cafe] runST $ unsafeIOToST $ ioWhatever

On Sun, 14 Apr 2024, Folsk Pratima wrote:

strError :: Int -> String strError errnum = runST $ unsafeIOToST ioString

Instead of (runST $ unsafeIOToST ioString) you could just call (unsafePerformIO ioString). However, ioString must not have observable side effects. throwIO does not look right and should be 'error'.