compiler support added for precise GC

[Walter Bright]

On 4/16/2012 11:26 PM, Jacob Carlborg wrote:
> Then it won't be possible to serialize third party types if they don't
> implements ISerializable. In this case, this solution is no better then manually
> registering types. Actually it's worse, since I can manually register third
> party types.

I'm not so sure in D that you can serialize arbitrary types without them 
designed to be serializable. For example, what will you do with unions? Pointers 
to global data?