From: "Alan Bawden" <Alan@lcs.mit.edu> > > Consider evaluating: > > (throw (f x) 42) > > Since you know that the expression `(f)' must yield a continuation, the > old continuation can be discarded (and perhaps reclaimed by the garbage > collector) -before- you call the function `f'. (throw (call-with-current-continuation (lambda (c) ...)) 42)