Bignum arithmetic actually is pretty simple in Rust if you use the right library...

millstone · on Jan 2, 2021

The operator overloading is nice but you still get smacked in the face right away by the borrow checker. Simple stuff like this won't compile ("use of moved value"):

    let a = Integer::from(10);
    let b = a + a;

pimeys · on Jan 3, 2021

This would work if `Integer` would implement the `Copy` trait. But I guess that type is heavy enough for it to be too expensive, therefore forcing you to explicitly call `clone()`.

Measter · on Jan 3, 2021

That `Integer` type can't implement `Copy` because it manages a resource, meaning you can't just do a simple memcpy of the type.

smmalis37 · on Jan 4, 2021

  let b = &a + &a;

will work, but I agree it's unfortunate that this is necessary.