<div dir="ltr"><div class="gmail_extra"><div class="gmail_signature" data-smartmail="gmail_signature">Thanks for both answers. It wasn't what I had in mind, but surely it is just that I have to get used to Haskell strong typing. Until now I think I'm used to apply DRY beyond types :)</div><div class="gmail_signature" data-smartmail="gmail_signature"><br></div><div class="gmail_signature" data-smartmail="gmail_signature">So, from you answers, I can conclude that there is no way to tell something like the following in a type signature: "any type build with that type operators". Isn't it?</div>
</div></div>