difficulty with binding example in patterns.md

[zjttoefs]

The second example for the bindings contains advanced syntax that the reader has not seen (at leat to the best of my knowledge when skipping "learn rust"). Those bits:

let mut x: Option<Person> = Some(Person { name: Some(name) });
match x {
    Some(Person { name: ref a @ Some(_), .. }) => println!("{:?}", a),
    _ => {}
}

This Some business is new and the matching of the inner type far from obvious.
Even the format string "{:?}" is not explained.

As an aside: There is no index that would find where Some is actually covered in the book.

(Otherwise: Well done on the book!)

[zjttoefs]

Both the ref and that use of .. are forward references within the same page. So just reordering a bit would help a lot.

[steveklabnik]

Thanks! Yeah, this can certainly use some cleaning up.