title: Is there any way to remove constexpr
body: <p>I got a pointer of constexpr const class*. </p>
  
  <p>Is there any way to remove constexpr, so I can access a variable editing member of class. Thank you </p>
  
  <p>(Yes, I ask a similar question removing const flag, butI think breaking down to the individual facts, combined with a general question, helps subsequent users)</p>