[Fire-Dragon-DoL]

Of course, but remember that `len` has constant return type, while in case of slices you'd have a return type that's different on the input slice

[brundolf]

I see. I guess I assumed that the category of special "privileged functions" would have their powers extend to cover stuff like that (I haven't used Go, I'm just going off of what I've read)

I'm very intrigued by the no-generics idea, so I'm prodding at what might've made it workable enough that this reversal wouldn't be necessary :)

[Fire-Dragon-DoL]

All good!

Well in Go the assumption is that you jump to interface{} (equivalent to Object in Java or void* in C) when you start having these kind of problems, but there is a performance penalty in doing that, which shouldn't be there if generics are present (and makes the code DRAMMATICALLY worse with all the casting)