Moving GC

[Sean Kelly]

== Quote from Christopher Wright (dhasenan at gmail.com)'s article
>
> This isn't unreasonable, and it really just depends on how complete and
> how fast D's runtime reflection is.

This would incur more memory overhead as well.  Right now, we make
do with one bit per block that indicates whether the block should be
scanned for pointers, while this may theoretically require a pointer
to TypeInfo per block in order to perform precise scanning.


Sean