[Haskell-beginners] How do I do inheritance in haskell?

[Benjamin Edwards]

>
> I think that's a bit over the top, because why shouldn't prices
> and volumes be interchangeable between Asks and Bids?


It's a good question. I guess as long as a price / volume is always wrapped
in a type that's tagged bid / ask then everything is great. You just want
to avoid being the next knight capital and ending up trading the wrong side
of the spread.
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