CIRCLE WITH A DOT

@citizen428 I mean it has simple uses too, like adding simple include statements in any file, or, as you've shown, macros.

I've used it to make a lockfile for my Containerfile, and I'd just build using cpp -E <file> | docker build -f- <...>

@citizen428 some slight modifications, and you can use cpp -E + that to make a static site generator using the preprocessor.