Wrapping C callbacks in Swift closures

Using Swift
23

Hi @eskimo,

I like reading this:

I was intrigued by your question because I often end up using low-level APIs that have C callbacks.

because then you may have already the solution

The post you suggested doesnt seem to work for my case though:

public class glfw {
   typealias ErrorFun = (Error, _ description: String) -> Void
   static func setErrorCallback(cbFun: ErrorFun) {
      withUnsafePointer(to: &self) { // error: cannot pass immutable value as inout argument: 'self' is immutable
         ..
      }
   }
}

No problem, I'll be more than happy to summarize it for you:
wrapping Swift capturing Closures around C Callbacks, which have no context parameter.