Google C++ needs for Clang

[Don]

Adam D. Ruppe wrote:
>> D/DMD is not modern/intelligent/good enough to catch this common
>> error yet, this gives no errors nor warnings in D2:
> 
> If you write the literal though, you do get the error:
> 
>         int kMaxDiskSpace = 10737418240;
> 
> test66.d(6): Error: cannot implicitly convert expression (10737418240L) of type
> long to int
> 
> This might be a bug in the compiler's constant folding, since it
> catches one form but not the other.
> 
> 
> The other two errors in that blog are done by D right now, despite
> it being obsolete, stupid, and not good enough yet.

Range propagation is not implemented yet, except for a couple of simple 
cases. (Bearophile -- do you actually know that? You've made many posts 
on  similar topics, which suggest all sorts of problems, but it's just 
not implemented yet).