Function lyon_geom::utils::cubic_polynomial_roots

Important traits for ArrayVec<A>

impl<A> Write for ArrayVec<A> where
    A: Array<Item = u8>, 

pub fn cubic_polynomial_roots<S: Scalar>(
    a: S, 
    b: S, 
    c: S, 
    d: S
) -> ArrayVec<[S; 3]>