Property Wrappers - Accessing the Enclosing Instance

Property Wrappers are great for encapsulating cross-cutting concerns and simplifying common patterns. However, previously it seemed impossible to access the enclosing instance to enable more advanced and useful behaviors. As it turns out, this was supported all along, just in a not-so-obvious way. Let me show you.

This is a companion discussion topic for the original entry at https://nsscreencast.com/episodes/532-property-wrappers-static-subscripts