That's known as destructuring-bind: http://www.lispworks.com/documentation/HyperSpec/Body/m_destru.htm http://www.lispworks.com/documentation/HyperSpec/Body/m_d

That's known as destructuring-bind: http://www.lispworks.com/documentation/HyperSpec/Body/m_destru.htm http://www.lispworks.com/documentation/HyperSpec/Body/m_dest... Is that a macro created by this library or a feature of the library? Edit: I did some reading and it looks to be a feature macro of the library.