Rust and D

[BLM768]

Looking at Rust's concurrency model, it does have some great 
ideas.
I wonder what would happen if D used thread-local heaps...

As far as syntax goes, the "shared" keyword could be used to 
distinguish between the heap types. I'm not sure how all this 
would work with "new", but I'm sure someone can think of a clean 
syntax.

In all, it's an intriguing idea, and it could fit with D's 
current concurrency model extremely well. I can definitely see 
this breaking code, but not much more than the switch to TLS 
globals did. It might be something to consider eventually.