[stcredzero]

What about a subset of Hoare's CSP, as in Golang/Erlang? Objective-C already has support for immutables. How hard would it be to implement channels?

[asarazan]

That would certainly be an interesting project, although the performance implications on a mobile platform may be an issue (although that's becoming more moot with each generation).

In this case, however, our goal was to take common, familiar interfaces and idioms in Objective C, and make them safer/more powerful.

Something more like channels-like would be quite useful, but it would likely be published under a different project.