Generics
Andrew Berg
andrew_c_berg at yahoo.com
Sun Sep 28 17:02:06 UTC 2003
...taking this off-list since it is so off-topic...
On Sun, 28 Sep 2003 09:43:41 +0100, Phil Hudson <phil.hudson at iname.com>
wrote:
>
> BTW, "generics" is a (badly named, IMO) synonym of the other terms. It's
> the term usually used in discussions of adding type-safe collections to
> Java. It doesn't mean what you (and I, initially) intuitively grasped. I
> don't know how it originated.
>
>
A quick (off-topic) history lesson. As I understand it, generics were
first implemented in ADA, which was a strongly, statically typed language.
In ADA, since there was no type coersion, collections were implemented as
generic packages: One in which one or more of the types were undeclared at
the time of package compilation. Then the package could be instantiated
into a concrete package, much like how templates work in C++.
I think that the term predates C++'s "template" by about 5 years. One of
the reasons that ADA generics worked better than C++'s template types is
that they were constrained to packages and had tighter integration into the
language. Templates, in comparison, feel much more like a slightly
improved macro preprocessor.
-andrew
--
andrew_c_berg at yahoo.com
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