What's up with the overloaded operators? `I >>` and `>= keep` might be terse, but they're hard to reason about unless you're already familiar with the library.

What's up with the overloaded operators? `I >>` and `>= keep` might be terse, but they're hard to reason about unless you're already familiar with the library. This probably isn't the kind of stuff you want to employ code-golf syntax for.