Create custom errors about ufofmt

[madig]

One day. Maybe I'll use https://github.com/dtolnay/anyhow instead.

[madig]

There are also some other crates for easier error handling, see e.g. https://rust-cli.github.io/book/tutorial/errors.html.

[chrissimpkins]

Thoughts about whether we need to implement much of the custom error type / handling here? Most of the error string reporting will come from the custom types in the norad lib and we simply spit out the file path involved and the error message from the library error.

[madig]

You could make an error type that is basically

enum Error {
    UfoError(norad::Error),
    MyFormattingError(something),
    // ...
}

The Display trait could then just pass through whatever the norad error does.

[chrissimpkins]

You could make an error type that is basically

enum Error {

    UfoError(norad::Error),

    MyFormattingError(something),

    // ...

}

The Display trait could then just pass through whatever the norad error does.

I like it! Do you want to add this?

[chrissimpkins]

#23