title: C++ macro to convert a string to list of characters
body: <p>Is it possible to have a macro to have:</p>
  
  <p>CHAR_LIST(chicken)</p>
  
  <p>to expand to:</p>
  
  <p>'c', 'h', 'i', 'c', 'k', 'e', 'n'</p>
  
  <p>[Reason I want it: because for even moderate-sized strings, a macro is hugely more convenient than manually expanding. And the reason I need to expand is passing in a string to a varidiac template]</p>