[Haskell-cafe] Selda, type operators and heterogeneous lists

[Marc Busqué]

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 :)

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?
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