Jason Dagit wrote:
On Mon, Oct 13, 2008 at 8:32 PM, Tommy M. McGuire <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Java (and presumably C#) "generics" are very much like a weakened
version of normal parametric polymorphism.
I'm curious, in what way are they weakened?
That's a good question. :-)
I picked up the idea while reading Java Generics and Collections, but I
can no longer find the part that *gave* me the impression. I suspect
that it is due to the type erasure vs. array runtime typing issues.
It may be the case that basic generics are identical to plain parametric
polymorphism, and that the wildcard expressions attempt to serve the
same purpose (with considerable divergence) as type classes and
existential types. But I don't know since my brains have apparently
turned to oatmeal.
--
Tommy M. McGuire
[EMAIL PROTECTED]
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