Recurse Center 12: AsRef

I spent a long time today trying to understand how the AsRef trait works. I failed.

I was able to split my tealeaves project code out into a handful of files and more strongly model the filesystem checks as Enums in the type system. If you are printing filesystem permission octals, don't forget the {:o} format string.

I find if I battle the compiler too long or just in general struggle to understand something, it drains me really quickly. No dopamine hits from little victories. This is one of the reasons I like unit testing - lots of little frequent victories and most of the time no time debugging weird production issues whilst praying for the sweet kiss of death.