> "It is possible to extend the basic notion of 'function call' to > allow functions to have multiple return points. This turns out to be > a surprisingly useful mechanism. This article conducts a fairly > wide-ranging tour of such a feature..."
Hmmm! I haven't done a deep look into the paper, but if I understand the basic idea, then Whalesong's implementation does a somewhat analogous thing to efficiently support multiple-value-return. Each return point has two targets to support a variation of the trick used by Ashley and Dybvig (An Efficient Implementation of Multiple Return Values in Scheme). Returners get to dynamically choose to send either to the single-value point, or the multiple-value point. ____________________ Racket Users list: http://lists.racket-lang.org/users
