A small crate that adds .transpose() to Option<Option<T>>
It allows you to reversibly swap the inner and outer options in the pair, so that you can use ? on the inner option
Example:
use optional_transpose::OptionTranspose;
fn example() -> Option<i32> {
let x: Option<Option<i32>> = Some(None);
let y: Option<i32> = x.transpose()?; // Returns None, as the inner option is None
Some(1)
}
assert_eq!(example(), None);