title: What do /+ and +/ indicate in D?
body: <p>In some of the Derelict source code, I see some blocks that are surrounded by <code>/+</code> and <code>+/</code>, like so:</p>
  
  <pre><code>/+ other
  alias FTC_MruNodeRec*       FTC_MruNode;
  alias FTC_MruListRec*       FTC_MruList;
  alias FTC_MruListClassRec*  FTC_MruListClass;
  +/
  </code></pre>
  
  <p>(Just an example, of course.) What are these? They look like comments, but the content looks like valid code. I'm not able to find anything on Google due to <code>/+</code> not being a useful search string. Any help?</p>