title: Generic type implementing more than one trait
body: <p>Here is my code :</p>
  
  <pre><code>struct Node&lt;T: PartialEq &amp; PartialOrd&gt;
  {
      left: Box&lt;Option&lt;Node&lt;T&gt;&gt;&gt;,
      right: Box&lt;Option&lt;Node&lt;T&gt;&gt;&gt;,
      value: Option&lt;T&gt;,
  }
  </code></pre>
  
  <p>I want to force the T generic type to implement both the PartialEq and the PartialOrd traits. I can't found the synthax to do this (the &amp; char not being the one I look for). Thanks for helping me.</p>