Structs3: relies on panic! which is not introduced in the official book until chapter 9

[bitmingw]

The exercise of Structs3 requires knowledge of panic! to complete the task.

    fn new(sender_country: String, recipient_country: String, weight_in_grams: i32) -> Package {
        if weight_in_grams <= 0 {
            // Something goes here...
        } else {
            return Package {
                sender_country,
                recipient_country,
                weight_in_grams,
            };
        }
    }

However panic! is not introduced in the official book until chapter 9 (Error Handling), so user who closely follows the book and does exercise will have additional challenge to find the right answer here.

Maybe we should just provide the panic! implementation here instead of asking user to find it?

[carneeki]

Agree, having the user implement the new package (and perhaps seeing the panic! but not needing to implement it) is probably more inline with a lesson about structs.

[VMois]

Agree. Needed to search how to panic!. Would be good to introduce panic earlier or to provide an implementation for it (the second option sounds better).

[thephet]

Hi, I am doing the exercises as a noob, and this needs to be fixed. No idea what I am supposed to do.