title: SASS with custom template selector
body: <p>I am using a templating system where I need to set the CSS selector to #%id%. However, no matter how I try to trick SASS into using that selector I cannot get it to work. Does anyone have any ideas on how I can make this work?</p>
  
  <p>I am always getting this error. </p>
  
  <p><code>Invalid CSS after "#": expected id name, was "%id%"</code></p>
  
  <p>Update: </p>
  
  <p>Here is what I have tried... </p>
  
  <pre><code>@mixin thing($id) {
    ##{$id} {
      color:red;
    }
  }
  @include thing(unquote('%id%'));
  </code></pre>
  
  <p>...and...</p>
  
  <pre><code>$id:'%id%';
  ##{unquote($id)} {
    color:red;
  }
  </code></pre>
  
  <p>...lastly...</p>
  
  <pre><code>#%id% {
    color:red;
  }
  </code></pre>