title: Scala's "postfix ops"
body: <p>I've searched for a half-hour, and still cannot figure it out.</p>
  
  <p>In <a href="http://docs.scala-lang.org/sips/pending/modularizing-language-features.html">SIP: Modularizing Language Features</a> there are a number of features which will require explicit "enabling" in Scala 2.10 (<code>import language.feature</code>).
  Amongst them there is <code>postfixOps</code>, to which I just cannot find a reference anywhere. What exactly does this feature allow?</p>