Nginx's configuration is the most flexible I've ever seen. When writing an nginx module, you have a handle to the config file being read, and you can do whateve

Nginx's configuration is the most flexible I've ever seen. When writing an nginx module, you have a handle to the config file being read, and you can do whatever you want. Conventions of syntax really are just conventions. There's no grammar. I'd prefer a formal language with a parse tree and all that, but I think the spirit of the nginx code is "just what you need and nothing more."