Nim - Introducing --gc:arc

[Walter Bright]

On 12/25/2019 5:27 PM, JN wrote:
> Some folks may find it interesting, Nim is introducing a new memory management 
> scheme:
> 
> "So ... this feature has been in development for quite some time now, Nim is 
> getting the "one GC to rule them all". However calling it a GC doesn't do it 
> justice, it's plain old reference counting with optimizations thanks to move 
> semantics."
> 
> https://forum.nim-lang.org/t/5734

D gave up on ARC for the time being because it was too easy to free an ARC 
object while retaining a live pointer to its innards (as pointed out by Timon 
Gehr). The solution to this is ownership/borrowing, which I am working on.