Ben Gamari <b...@well-typed.com> writes: snip
> As far as I understand as long as the existentially-quantified argument > is unconstrained (therefore there is no need to carry a dictionary) and > of kind * (therefore has a uniform representation) there is no reason > why unpacking shouldn't be possible. > To clarify, as pointed out in #10016 it should also be possible to unpack in the constrained case. You merely need to retain a spot in the datacon's representation to place the dictionary. I hope this helps. Cheers, - Ben
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