On 7/30/12 11:03 AM, Don Clugston wrote:
On 30 July 2012 16:28, Andrei Alexandrescu<[email protected]> wrote:
On 7/30/12 10:27 AM, David Simcha wrote:
So is http://d.puremagic.com/issues/show_bug.cgi?id=8428 officially a
wontfix for this release?
I think it's quite important we fix that one and its ilk.
Bug 5939 seems to be a Phobos design flaw, and this one is probably related.
Unfortunately, I don't think we can fix the problem other than by
ripping all Voldemort types out of Phobos. Voldemort Types now appear
to be a concept that has tragically flawed semantics, and also has
poor performance (see
http://d.puremagic.com/issues/show_bug.cgi?id=5939). Removing them
would be a big change to make this late in a release cycle.
I don't know what to do here.
OK, let's step back for just a second here.
The first response to
https://github.com/D-Programming-Language/phobos/pull/728 is it reflects
a problem with the compiler.
My conjecture (and please correct me if I'm wrong) is there should be no
difference between a Voldemort static struct (emphasis on STATIC, which
is not currently used in map) and a classic struct defined outside map.
I'm saying this because I see no difference in what state is available
and how code would be generated between the two. It's a simple name
visibility issue.
If that's correct, the fix in
https://github.com/D-Programming-Language/phobos/pull/728 should simply
add "static" to the Voldemorts, and implement the same functionality
that it's currently implementing.
Longer term, it has become obvious to me that we need a clear and simple
mechanism for a function to save another function passed by alias, even
if that function holds state. That must happen regardless of interaction
with Voldemort types. We must have a mean do e.g. define a scope
delegate that holds the alias function and is able to call it. This has
been a long-standing problem that we've avoided in limited cases by
relying on the built-in frame pointer.
Andrei
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