Yeah exactly, especially for newer people.

I wouldn't be surprised if someone read `b = expr(a++)` to indicate that `a` is incremented, and then passed into `expr`, especially considering that it is within parentheses. The fact that it does it after passing it in is weird, and not obvious, at least not in my opinion. In my mind, there's no reason not to do what you suggested, or do the increment of `a` on the line before if you want the prefix.