On Wednesday, 10 July 2024 at 18:34, Rob Landers <rob@bottled.codes> wrote:
> Hello internals, > > I know now that some of you are swamped getting ready for 8.4, so I want to > be clear that this will be an 8.5+ thing. I am simply sending it to the list > in case anyone wants to discuss it, burn it with fire, give it a gold star, > or ignore until later. > > Currently, a WeakMap may only have object keys, and this logically makes a > lot of sense. However, there are cases where you want to reference an object > by a value but if the value is no longer referenced, no longer need it. A > good example of this might be used in dependency injection containers, lookup > tables for value objects, etc. > > I'd like to propose a ReverseWeakMap where the keys must be scalar, and given > an object as the value. Once the value is no longer referenced, the key and > value is removed from the ReverseWeakMap. Isn't this use case already solved with WeakReferences? https://www.php.net/manual/en/class.weakreference.php Best regards, Gina P. Banyard >
