You mean "f x y" instead of e.g. "f(x,y)"? You can generalize that into handling operators of various arity both before and after the operator. E.g. I once ha

You mean "f x y" instead of e.g. "f(x,y)"? You can generalize that into handling operators of various arity both before and after the operator. E.g. I once had a parser that would handle "x op y z". I don't recall why - it was 30+ years ago, but I can back up that it's a fairly simple modification to expand precedence based parsers this way.