pub fn pow<S, D>(operand: S, exponent: S) -> Result<D, ()>where
    S: FixedUnsigned + One + PartialOrd<D> + Zero,
    D: FixedUnsigned + From<S> + One + Zero,
    D::Bits: Copy + ToFixed + AddAssign + BitOrAssign + ShlAssign,
    S::Bits: Copy + ToFixed + AddAssign + BitOrAssign + ShlAssign + Shr + ShrAssign,
Expand description

power function with arbitrary fixed point number exponent