Re: [RFC][VOTE] Objects as Keys

Hi, Le 16 déc. 2014 13:45, "Rowan Collins" <rowan.collins@gmail.com> a écrit : > > Patrick Schaaf wrote on 16/12/2014 11:46: > >> Am 16.12.2014 12:36 schrieb "Matteo Beccati" <php@beccati.com>: >>> >>> On 16/12/2014 11:52, Andrea Faulds wrote: >>>> >>>> I was previously in favour of this, but it’d prevent actual indexing >>>> by objects in future, and I can’t think of any use cases which aren’t >>>> better solved by explicitly converting to a string/integer. >>> >>> That's precisely the same reason why I voted Nay. And I wouldn't have >> >> been able to put it down in words better than Andrea did. >> >> That was my thought initially, too. But I think it is wrong. If PHP ever >> gets around to provide objects-themselves-as-array-keys support, it can >> easily do that >> >> 1) only if the object does not have such a __toKey() method, or >> 2) if the object has one, but it returns the object itself (which is >> forbidden now by the RFC) > > > Hm, that's an interesting thought. My thought had been that an object-as-key would need to specify its hash anyway, so that two objects of the same "value" would be automatically de-duped, just as two strings are. But I guess an internally unique handle for the specific object would also be a reasonable approach for some uses. Just a random thought: the __hash method can just `return spl_object_hash($this);` to have an object id. > -- > Rowan Collins > [IMSoP] > > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php > Cheers, Florian Margaine