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What is wrong with Generics?

Piet Souris
Ranch Hand

Joined: Mar 08, 2009
Posts: 547
    
  11
Thanks Pat, for bringing us all back into the real world

But to end (?) this topic in a more positive way:

What is great about Generics?

1) I like them a lot, type erasure or not

But most of all:

2) they sometimes give rise to very interesting and entertaining topics!
Winston Gutkowski
Bartender

Joined: Mar 17, 2011
Posts: 7795
    
  21

Pat Farrell wrote:On the more general topic: what is wrong with Generics, their design and implementation?

My answer:
1. People expect too much of it.
2. The compiler warnings are crap.

If you actually read Gilad Bracha's paper (now, thankfully, translated to the tutorials), he explains the issues with implementation, which basically boils down to the fact that, for whatever reasons, Java was NOT able to make typed classes first-class objects, so they chose the next best option that was backwards bytecode-compatible: type erasure.

Winston

Isn't it funny how there's always time and money enough to do it WRONG?
Articles by Winston can be found here
 
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subject: What is wrong with Generics?