Formatting for Custom Data Types

std format is now starting to be supported in most of most if not all of the major compilers. But what also changed completely when you if you're coming from an IO streams world is how you enable formatting for your own custom data types. And that's I think a bit more involved than it used to be in inIO streams. There's not too many resources out there right now that explain how that that part of the mechanism works, but we will see some more resources on that in the future as well.