Hehehe

test.rs

trait MyMul<RHS, Res>
{
    fn mul(&self, rhs: &RHS) -> Res;
}

impl<T: ToPrimitive> MyMul<f64, f64> for T
{
    fn mul(&self, rhs: &f64) -> f64
    {
        self.to_f64().unwrap() * *rhs
    }
}

fn interp<T: MyMul<f64, f64>>(a: &T, b: &T, alpha: f64) -> f64
{
    a * alpha // wut
}

fn main()
{
    
}