Compile Time Function Execution (CTFE) in D

Influenced by Sean Baxter's excellent presentation on Circle, "The C++ Automation Language", at a Silicon Valley C++ meetup (https://www.meetup.com/ACCU-Bay-Area/events/277352925/), Ali Cehreli will show some of D's compile-time features.

Here is a starting point: https://tour.dlang.org/tour/en/gems/compile-time-function-evaluation-ctfe

As always, the main topic will likely be just an anchoring point, and we will diverge to many different topics.