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Re: Common Lisp solved this problem 20 years ago
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