Escape analysis (full scope analysis proposal)

[Andrei Alexandrescu]

Steven Schveighoffer wrote:
> I think everyone who thinks a scope decoration proposal is going to 1) solve 
> all scope escape issues and 2) be easy to use is dreaming :P

I think that's a fair assessment. One suggestion I made Walter is to 
only allow and implement the scope storage class for delegates, which 
simply means the callee will not squirrel away a pointer to delegate. 
That would allow us to solve the closure issue and for now sleep some 
more on the other issues.

Andrei