Loop, like structured editing (Paredit), is one of those Interlisp things that's very controversial and divisive. There's tons of really wild ideas in Interlis

Loop, like structured editing (Paredit), is one of those Interlisp things that's very controversial and divisive. There's tons of really wild ideas in Interlisp that seemed to be the half-baked acid trip ideas of West Coast hippies at the time, that are just starting to become rediscovered in the past couple of years (pervasive undo -> reversible debugging, DWIM-like autosuggestions in more places), and even the implementation techniques used are still innovative (for example the error-trapping implementation of Conversational Lisp (http://docs.google.com/viewer?a=v&q=cache:4GnEnGS2XXkJ:citeseerx.ist.psu.edu/viewdoc/download%3Fdoi%3D10.1.1.99.5401%26rep%3Drep1%26type%3Dpdf+%22conversational+lisp%22&hl=en&gl=ca&pid=bl&srcid=ADGEEShXWxn-mRgD0X-rMQN8IFezuWx7CRduPKQjuZWX2Qo1-BneEpeKTwpl5mMBxygVHRFiPkx37Sq3sY-hZN-GusSJAlZAXqxpSwjgF4uK0sXwFAb_zoygkiNO9MinjQxudj8C0nF5&sig=AHIEtbQiXOK77aVM2PKV9gYI-ek1oG1q1A http://docs.google.com/viewer?a=v&q=cache:4GnEnGS2XXkJ:c...) is quite similar to how Geoff Wozniak approached auto-defining functions (http://exploring-lisp.blogspot.com/2008/01/auto-defining-functions.html) http://exploring-lisp.blogspot.com/2008/01/auto-defining-fun...)