title: What is an in-place constructor in C++?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/222557/cs-placement-new">C++&#39;s &ldquo;placement new&rdquo;</a>  </p>
  </blockquote>
  
  
  
  <p>What is an in-place constructor in C++?</p>
  
  <p>e.g. <code>Datatype *x = new(y) Datatype();</code></p>