title: Can we use metaprograming get biggest(sizeof) type in a union?
body: <p>I know <a href="https://stackoverflow.com/questions/26442859/getting-the-biggest-type-from-a-variadic-type-list/26442896#26442896">how to get the biggest type in typelist</a></p>
  
  <p>Is there a way get biggest(sizeof) type in a union?</p>
  
  <p>I mean Something like:</p>
  
  <pre><code>GetBiggestType&lt;SomeUnionType&gt;::type
  </code></pre>
  
  <p>and the type is biggest type.</p>