[Haskell-cafe] Simplest way to move a ... `using` ... line into the IO monad?

David Banas capn.freako at gmail.com
Fri Oct 27 18:36:53 UTC 2023

Hi all,

What is the simplest way to translate a non-monadic line of Haskell code, such as:

res = map foo xs `using` parList rseq

For use in the IO monad?

This doesn’t work:

res <- mapM fooM xs `using` parTraversable rseq


No Traversable instance for IO.


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