use std::ops::Sub;

struct Foo {
    value: i32
}

trait MuhTrait {
    fn traitfn(self, other: Self) -> Self;
}

impl MuhTrait for Foo {
    fn traitfn(self, other: Self) -> Self {
        other.value - self.value
    }
}

impl<T> Sub<T> for T where T: MuhTrait {
    fn sub(self, other: T) -> T {
        other.traitfn(self)
    }
}

fn main() {
    println!("Hello, world!");
}