Updating PMC struct

[Andy Dougherty]

On Sat, 15 Aug 2009, Andrew Whitworth wrote:

> Thanks to some patches from jessevdam++ on TT #549, I think we have a
> viable way forward in removing the UnionVal structure. The patch is
> very large, but I've been looking it over for the past two days and
> have gotten a good idea about what it all does. The current version is
> applied in the pmc_sans_unionval branch.

I only had time for the briefest of looks at this, but what I saw looks 
sensible.  I don't think there's really any shorter or partial 
implementation that could be tried as a half-way point.  All those things 
(strings, PMC, Buffers, GC) really are tangled together in a complex way.

-- 
    Andy Dougherty		doughera at lafayette.edu