Another cool thing about macros is that, since the Haxe compiler itself implements a language server, you can go really crazy with AST manipulations and it will

Another cool thing about macros is that, since the Haxe compiler itself implements a language server, you can go really crazy with AST manipulations and it will all show up in your IDE's autocomplete feature (if you have one). There was a demo I saw a while back where someone added Google search suggestions to their IDE by hitting a Google endpoint in a Haxe macro.