GSoC 2016 - Precise GC

[Jeremy DeHaan via Digitalmars-d-announce]

On Tuesday, 3 May 2016 at 16:44:32 UTC, Jack Stouffer wrote:
> On Tuesday, 3 May 2016 at 16:15:27 UTC, Jeremy DeHaan wrote:
>> I agree, but a precise heap scan should be the easiest part of 
>> this project. Rainer Schuetze has already implemented this and 
>> presented it at a dconf a few years ago(2013?). My plan is to 
>> use that since I know it works, and that frees up my time to 
>> focus on pretty much everything else.
>
> I don't remember all the details, but I'm pretty sure that 
> Rainer, or maybe someone else, was talking about how a precise 
> GC is not completely possible in D because D has unions.

I am reading a paper on how one could use extra information about 
what was last assigned to a union in order to scan them 
precisely. I haven't read the whole thing yet, but it looks like 
it could be done.

Not sure if it is something I can get to in the course of my 
project though. Scanning only unions conservatively is still 
pretty good.