I've always thought the aversion to variance was a mistake...
I think that a lot of those bugs can be explained as an incomplete understanding of variance for many people: it's really hard to get your head around it!
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@jsuereth book does a good job of explaining variance for the general dev population. Oldie now, but good reference for that. Need to read that chapter again to see how perceive it now.Thanks. Twitter will use this to make your timeline better. UndoUndo
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You could do a Ph.D. out of trying to understand how higuer-kind type parameters and subtyping and variance combine together. Turns out somebody did https://infoscience.epfl.ch/record/232408/files/EPFL_TH8014.pdf …
End of conversation
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