Even without if let or match many of those unwraps are unnecessary. See https://github.com/zookini/aoc-2020/blob/master/src/bin/2.rs

Interesting! Can you help me understand why this doesn't work for me?

    error[E0599]: no method named `parse` found for enum `Option<regex::Match<'_>>` in the current scope
      --> src\main.rs:24:39
       |
    24 |                 min: caps.name("min").parse().unwrap(),
       |                                       ^^^^^ method not found in `Option<regex::Match<'_>>`

I think you need .name("min")?.as_str() to access the underlying text of the match object (after making sure it is a valid match with the ?), which can then be parsed. The regex Match object itself does not have a parse method that I can see.

I don't know what the structure Input looks like but I played around with your code and it seems to work with as_str()

https://play.rust-lang.org/?version=stable&mode=debug&editio...

caps.name("min") returns an Option which you need to handle e.g. by unwrapping. You can use caps["min"] instead if you don't want an option.