title: Is the `:~>` Identifier in Haskell "Proper"?
body: <p>I've seen this operator used on Haskell blogs, but cannot find its source in Hoogle. Is the <code>:~&gt;</code> operator a part of the language core? If so, what does it denote?</p>
  
  <p><strong>EDIT:</strong> It does appear to show up in a <a href="https://hayoo.fh-wedel.de/?query=%3A~%3E" rel="nofollow noreferrer">Hayoo search</a>, but which one denotes the canonical usage?</p>