On Monday, 2 December 2013 at 12:19:12 UTC, Manu wrote:
On 2 December 2013 19:33, Dejan Lekic <[email protected]>
wrote:
On Friday, 29 November 2013 at 13:44:10 UTC, Manu wrote:
* ARC
* rvalue -> ref
* virtual-by-default
* GC improvements
* AA fixes
On 29 November 2013 07:01, Fra <[email protected]> wrote:
Personally I would love to see this old issue finally
implemented/fixed:
There can be only one alias this.
https://d.puremagic.com/issues/show_bug.cgi?id=6083
What would your choice be?
I hope virtual-by-default never gets approved. I read DIP51
and quite
frankly I am not convinced at all. It is basically "I do not
want to put
final in front of my methods. Well, I do not want to put
virtual in front
of my methods... But this is perhaps something for another
discussion...
There's been endless discussions on the topic. There was a link
to a thread
with loads of discussion.
The problem is that virtual is irrevocable. It can't be removed
without
breaking the API, which means it's not possible to optimise a
library in
that way at any time after it has already been released to the
wild. The
converse is not true.
It has also been agreed that there is very little the
compiler/optimiser
can do to help.
It's a dangerous default, it's got absolutely nothing to do
with "I don't
want to type final" as you helpfully simplified it. You can
type 'virtual:'
at the top, and you're set. Again, the converse doesn't stand,
you can't
practically type 'final:' at the top since there will
inevitable by SOME
virtual methods.
We can spin off another thread if you like, or you can read
through the old
ones. I don't think it's going to go any further than the other
threads
already did.
No offense, so far I haven's seen a GOOD reason for making final
to be the default. Your DIP51 is, to put mildly, pretty
subjective. You care about performance, I get it, but I do not.
Developers like me use classes exactly because methods are
virtual. In my career I *rarely* had situation that I knew ahead
my class method is *definitely* final.
You say "dangerous". - I am quite sure people are aware of those
"dangers".
You say "people agreed". Who agreed? :)
You say there have been endless discussions. Yes, I remember them
but I do not remember anything conclusive after reading them.
This is *a radical change*, and instead of "(unknown) people
agreed" the community deserves a better explanation why are we
switching to final as default storage class...
