I'm curious if anyone knows why the various bitwise operations all take u32 for the bit units? It seems like u8 or u16 would work fine.

# Why does `count_ones` return a `u32`?

It's probably because the results of those operations are often used as shift distances, and the input argument for shift distance to the shift operators is a `u32`

. Remember that Rust is designed to work with non-primitive numeric types, such as BigInt and BigUint, where small shift distance ranges would be insufficient.

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This is not true. The shift operators are implemented for every combination of integer types, and bigints can implement the shift operators for any number of integer types they wish.

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