On Mon, Mar 26, 2018 at 07:21:22PM +0000, PICCA Frederic-Emmanuel wrote: > How Can I tell to haskell, produce the result even if I do not use it. deepseq [1]! [1] https://hackage.haskell.org/package/deepseq-1.4.3.0/docs/Control-DeepSeq.html#v:deepseq