Does associative array change the location of values?

Steven Schveighoffer schveiguy at
Sat Oct 30 16:55:03 UTC 2021

On 10/30/21 10:51 AM, Stanislav Blinov wrote:
> On Saturday, 30 October 2021 at 11:59:15 UTC, Steven Schveighoffer wrote:
>> It should be documented. There isn't a valid way to remove these 
>> requirements, even if they are currently just an implementation detail 
>> -- code already depends on these properties.
>> And D is a GC-based language, especially when using AAs. There is no 
>> reason to introduce undefined behavior for existing usage.
> You won't introduce UB by deallocating unreferenced elements, which a 
> given GC *may* be able to figure out. Therefore I object to "AAs do not 
> deallocate the key/value pairs ever" part. Strongly :) Until such time 
> that such a requirement is indeed set in stone, and not incidental.

auto v = k in aa;

How can the GC/compiler work out that there is still a reference?


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