title: Is there a command to halt the interpreter in Common Lisp?
body: <p>I'm looking for an expression that will cause the interpreter to exit when it is evaluated.</p>
  
  <p>I've found lots of implementation-specific ones but none in the HyperSpec, and I was wondering if there were any that I wasn't seeing defined in the specification. I've found that <code>(quit)</code> is recognized by both CLISP and SLIME, and <code>(exit)</code> is recognized only by CLISP, but I can't find any documentation that references either of these.</p>