title: Write macros for GCD calls?
body: <p>I'd like to create a macro for GCD calls like for example:</p>
  
  <pre><code>dispatch_async(dispatch_get_main_queue(), ^{
      stuff....
  });
  </code></pre>
  
  <p>the macro could look something like this:
  main(^{...})?</p>
  
  <p>Not sure how to write it. Any suggestion?</p>
  
  <p>thank you</p>