On Fri, May 15, 2009 at 07:16:45PM -0500, John M. Dlugosz wrote: > Reading through S02, I see that contextual variables has changed in the > last year. It appears that contextual and global variables have been > unified. So, the + twigil is no more? > > I assume the point is that any supposed "global" can be overridden in > dynamic context, rather than having to know which you planned to and > which you didn't. Normal code should use $*x, not $GLOBAL::x or > whatever. > > Is that it, or is there more I need to be filled in on?
That's it, you've nailed it in one. Though perhaps we could mention here that part of the motivation is to push context info down the dynamic stack to the point where we minimize shared state between threads. And also, knowing whether a particular context var is rw or not means we know whether we can just make a copy into our current thread with value semantics, or we have to manage a lock around the shared container. Well, that's the hope... Larry
