A generic way to set bits. Yeah, you don't have to like it...

gistfile1.rs

/// Never really tested this...
#[inline(always)]
fn set_bit<T: One + BitOr<T, T> + BitAnd<T, T> + Shl<T, T> + Not<T>>(val: T, bit: T, on: bool) -> T {
    if on { val | one::<T>() << bit } else { val & !(one::<T>() << bit) }
}