Concurrency

So QED classes have been designed to be be invoked as types (with the new operator, and -> to handle return events if need be) or as calls (without new). In the previous examples though, we’ve mostly seen classes that are either designed as pure object (using new, without return call to generate events) or calls (with one return call done, not using new). Implementing these calls as plain lowercase-first-letter functions would have been more efficient so there seems to be no purpose using class calls.

Yet, QED classes were designed this way, because there are use cases where classes fit perfectly being invoked both ways!

We’ll take the time to discover these mysterious classes through the rest of this tutorial.