Richard Jones wrote:
> The problem, I'm guessing, is that you add polymorphic +, -, and so
> on.  But that's really just a hack in the language.  Sooner or later
> people are going to ask why it's not possible to write a polymorphic
> 'print' function, _without_ hacking the language some more.  At that
> point you need a theory, and you need something like G'Caml, or type
> classes, or GADTS.

Pardon my ignorance, but how are GADTs are going to help in this regard?
I thought GADTs are basically data types with constructors that have
non-uniform "return type".

Friendly,
Dmitry

-- 
Dmitry Lomov
JetBrains Inc.
http://www.jetbrains.com
"Develop With Pleasure!"