title: Missing type specifier and one more question
body: <p>I'm trying to make a short chrono declarations</p>
  
  <pre><code>#pragma once
  #include &lt;chrono&gt;
  
      class Foo//: public SINGLETON&lt;Foo&gt;
      {
      public:
          using point = std::chrono::steady_clock::time_point;
          using secs  = std::chrono::duration_cast&lt;std::chrono::seconds&gt;;
          using now   = std::chrono::steady_clock::now();
      };
  </code></pre>
  
  <p>So that's the whole code.
  First issue, this code don't want to compile.
  First compile error:</p>
  
  <pre><code> error: 'duration_cast&lt;std::chrono::seconds&gt;' in namespace 'std::chrono' does not name a type
    using time_secs  = std::chrono::duration_cast&lt;std::chrono::seconds&gt;;
  </code></pre>
  
  <p>Second error;</p>
  
  <pre><code>error: expected type-specifier
    using time_now   = std::chrono::steady_clock::now();
  </code></pre>
  
  <p>Now a question about usage of those, i want to use them like this;</p>
  
  <pre><code>time_point  GetElapsedtTime(){return time_secs(time_now - Another_time_point ); }
  </code></pre>
  
  <p>Can i use them like above ?</p>
  
  <p>I'm trying to set time point intro a variable, then to countdown the elapsed time until it reaches 1hour for example, then when 1 hour elapses.. do something.</p>