multiple impls

gistfile1.rs

struct Junk { a: f64 }
impl Mul<Junk,Junk> for Junk {
    fn mul(&self, rhs:&Junk) -> Junk {Junk{a: &self.a * rhs.a}}
}
impl Mul<f64,Junk> for Junk {
    fn mul(&self, rhs:&f64) -> Junk {Junk{a: &self.a * rhs}}
}

fn main(){
    println((Junk{a:2_f64} * Junk{a:3_f64}).a.to_str());
    println((Junk{a:3_f64} * 4_f64).a.to_str());
}