Discussion Thread: DIP 1042--ProtoObject--Community Review Round 1
elronnd at elronnd.net
Sat Jan 15 09:34:46 UTC 2022
On Saturday, 15 January 2022 at 08:33:45 UTC, Timon Gehr wrote:
> `pure` toHash can also be rather problematic in case it returns
> the address of the object as an integer (as it currently does
> by default). Pure code should not depend on GC memory addresses.
There has been a comment about that in object.d for over a
decade; in that time, no one has made a compacting GC. More
practically, if somebody does write a compacting GC, it will be
child's play for them to go and add a 'hash' field to Object and
change the implementations of cmp and toHash.
(Obviously userspace code should not depend on such mechanisms,
but for druntime, what is the problem?)
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