Cannot find value `book` in this scope, not found in this scope Error

[tropic granite]

Hi, can someone explain me how can i use book variable outside of match scope

Cannot find value book in this scope, not found in this scope Error

[graceful blaze]

How would that work if there is no book in the _ branch?

[fresh eagle]

return the an option that may contain the book value

i think this will work (forgive my current mobile state)
playground

[regal sentinel]

let book: Option<Xls<_>> = match path.extension() {
    Some("xlsx") | Some("xls") => Some(open_workbook(path).expect("Cannot open file")),
    _ => {
        println!("whatever");
        None
    }
};

[graceful blaze]

cannot match that on Some("literal") unfortunately

[regal sentinel]

Why not?

[graceful blaze]

it's an osstr, not str

[tropic granite]

i thank you all but i found a solution thanks to friend, he told me to do like that and it worked, i will be happy if you share your opinion on that so i can learn more.

the input file can be xls or xlsx so i needed a way to accept both, calamine created a wrapper that help when the file type is not known

[graceful blaze]

yeah just not doing that works too

[tropic granite]

we found this solution because compiler give us error