title: CDT on hover show documentation
body: <p>In JDT, if we hover any object, like a function, class, variable etc, eclipse shows the documentation in a tool tip. This documentation is also displayed when the code-assist window shows the possibilities.</p>
  
  <p>However, CDT does not work like this. By default, it shows the code of the hovered object. There's a setting in <code>Window -&gt; Preferences -&gt; C/C++ -&gt; Editor -&gt; Hovers</code>, to choose <code>Documentation</code> to be displayed, but unfortunately it does not show anything. Also there's a project called <a href="http://www.eclipse.org/linuxtools/projectPages/libhover/">libhover</a>, but it seems it does not work with in-code doxygen comments.</p>
  
  <p>Is there any solution to mimic JDT hover behavior in CDT?</p>