On Friday, 9 February 2018 at 01:36:02 UTC, Mike Franklin wrote:
On Friday, 9 February 2018 at 01:31:41 UTC, Mike Franklin wrote:
On Thursday, 8 February 2018 at 17:10:00 UTC, bachmeier wrote:
What are D's limitations on do-it-yourself reference counting?
* Types that are built into the language like dynamic arrays,
associative arrays, and exceptions won't benefit from DIY
reference counting.
* Much of Phobos probably wouldn't be compatible with DIY
reference counting.
That being said, there may be a way to override some runtime
hooks like _d_newclass
(https://dlang.org/library/rt/lifetime/_d_newclass.html),
etc... to make it work. But I haven't tried.
Also, I think Walter is currently working on getting reference
counted exceptions into the language:
https://github.com/dlang/druntime/pull/1995
Mike
Also, I think DIY reference counting is already done for us in
the automem library
https://dlang.org/blog/2017/04/28/automem-hands-free-raii-for-d/
Mike
We use std.typecons.RefCounted in many places in Phobos too.
There is only one big problem at the moment: it's not @safe and
can only be @safe with DIP1000.
This is actually blocking a lot of work - think RCString,
containers or even just a simple range which needs heap memory as
state.
