Infer the string key name

[sindresorhus]

We currently have to define the key name twice:

static let key = Defaults.Key<Bool>("key", default: false)

Would be nice if we could infer the string "key" from the static let key name. I've not managed to find a way to do this, but help welcome.

[sindresorhus]

I no longer believe this is a good idea. This would make it possible to accidentally refactor to rename the key and cause data loss.

For example, in my project, I have often come up with a better key name after a while, but I cannot change the internal storage key, so I have something like this:

static let someBetterName = Defaults.Key<Bool>("foo", default: false)