`if let` of multiple values?
There can be only one `let`, but it can be a tuple that expects multiple things. This is equivalent of `a && b`:
if let (Some(a), Some(b)) = (a, b) {}
For `a || b` you can use the `.or()` method of `Option` and `Result`:
if let Some(a_or_b) = a.or(b) {}
Try it: https://is.gd/SJNWQG