so am I right in thinking that every rust function with a generic return, e.g. collect(), sum(), into(), is implemented by constraining the return to implement some trait and then just calling that trait?
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p much, parametric polymorphism dictates that if you return an unconstrained T, you have no way to conjure one up from thin air
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std::mem should get back in its Box
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Please mem::forget() it
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*barges in kool-aid man style* *pushes up glasses so far they're on my forehead now* actually, std::mem doesn't let you create values of type T, it only let you think you did, while actually creating one (1) undefined behavior
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Well, since it's undefined behavior, you can't conclusively exclude the possibility that the behavior is the creation of a value of type T
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