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Re: Common Lisp solved this problem 20 years ago

This page is part of the web mail archives of SRFI 77 from before July 7th, 2015. The new archives for SRFI 77 contain all messages, not just those from before July 7th, 2015.

I have realized (remembered?) that type specifiers are only one of the ingredients in this particular recipe for solving this problem.

For example, consider the following in Kawa's notation:

  (lambda (x :: <flonum> y :: <flonum>) :: <flonum>
    (/ x y))

Unless the compiler can be sure that / is the standard division procedure, there is not much it can do.

Of course, module systems often allow the compiler to figure out what / really is, and a module system will come fitted as standard in R6RS.


Dr Alan Watson
Centro de Radioastronomía y Astrofísica
Universidad Astronómico Nacional de México