title: inheriting from a templates class with variable parameters
body: <p>I have this code:</p>
  
  <pre><code>  template&lt;char ...T&gt;
    class base
    {
         std::array&lt;uint8_t, ID_SIZE&gt; m_ID = { Ts... };
    }
  
    template&lt;char ...T&gt;
    class derived: public base&lt;T&gt;
    {
         // this class doesn;t need to know anything about T
    }
  </code></pre>
  
  <p>when I compile this code, I am getting this error:</p>
  
  <pre><code>  'T': parameter pack must be expanded in this context  
  </code></pre>
  
  <p>What is this error and how i can fix it?</p>