But if you want to read code that says that, you either have to know, or go look it up. If someone writes code like that, I figure they are probably hacking a k

But if you want to read code that says that, you either have to know, or go look it up. If someone writes code like that, I figure they are probably hacking a kernel or something, so they know the precedence rules and expect anyone reading the code to know them too. Me, I looked it up. He only said not to compile it, not that you couldn't learn something at the same time.