Re: Generics proposal

Hey Sara, can you already show us how your take on Generics would look like? Maybe this is a good moment for HipHop and PHP to do something together. Am 06.11.2012 um 04:14 schrieb Sara Golemon <pollita@php.net>: > Sorry to be late to the conversation, but fwiw, HipHop is adding > Generics (and some other cool things) to our PHP implementation. We > plan to provide a PHP equivalent implementation in the form of a > pre-processor extension which can live in PECL. The implementation > would of course be cleaner if done directly in the engine, but with > APC the performance hit of doing an extra transformation pass should > disappear. Hopefully this satisfies both the want for Java/C++-like > syntax without "polluting" the language. > > -Sara > > On Tue, Oct 23, 2012 at 4:21 AM, Etienne Kneuss <colder@php.net> wrote: >> Hi, >> >> On Tue, Oct 23, 2012 at 4:17 AM, Levi Morrison <morrison.levi@gmail.com> wrote: >>>>> Especially if the ability was afforded to arrays as well (function >>>>> foo(array<Bar> $array){})... >>>> >>>> This would require O(n) runtime tests, I would definitely not go there. >>> >>> Actually, it does not require O(n) runtime tests. The solution is >>> simple: store the type when it is created. Whenever an element is >>> added, make sure it matches the correct type. All this does is add >>> some flat overhead. >> >> If you test every time you add one element, that's still O(n) tests >> where n is the size of the array, the only benefit is that it is not >> checked for each calls to a function. But now we are talking about >> attaching non-trivial types to variables, and non-trivial checks in a >> lot of places (think references etc..), let's not go there... >> >>> >>> I am also supportive of the idea of having generics, but I am not sure >>> that the work it would take is worth it. >> >> >> >> -- >> Etienne Kneuss >> http://www.colder.ch >> >> -- >> PHP Internals - PHP Runtime Development Mailing List >> To unsubscribe, visit: http://www.php.net/unsub.php >> > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php >