Many languages with powerful macro systems can do the same. Still, it's cool/promising to see a .NET language capable of compile-time execution like this when t

Many languages with powerful macro systems can do the same. Still, it's cool/promising to see a .NET language capable of compile-time execution like this when they do not support macros in the same way that other languages do (but they do have plenty of reflection features and some codegen features as we see here).