Re: Generics proposal

I see what you're trying to do but not a big fan of how it's being implemented in the example given. - Mike Sent from my iPhone On Oct 20, 2012, at 4:02 PM, Rasmus Lerdorf <rasmus@lerdorf.com> wrote: > On 10/20/2012 01:59 PM, Nikita wrote: >> Hello, list. I want to propose generics. For those, who don't know what it is, >> here's example: say we have a Comment class, that has a method getBody.. Also we have >> Collection class, that implements Traversable. Now, if I want to validate all insertions into >> collection of comments, I would need to create CommentCollection class, extend it from Collection, >> and override all the methods that are dealing with adding new elements to collection. Moreover, I >> can't have any hints from my IDE about type of collection's elements, so if I'll have >> code like this: >> foreach ($commentCollection as $comment) { >> $comment->getBody(); >> } >> There will be no way for IDE to know, of what type that object will be. >> >> But there's how I could solve my problem with generics: >> class Collection<T> implements Traversable >> { >> ... >> public function add(T $element){} >> } >> $collection = new Collection<Comment>(); >> >> $collection->add(new Comment()); >> >> $collection->add("that will be error"); >> >> Actually, that's, again, all about type hinting. If we went so far with scalar type >> hinting, then generics would also be a good addition. >> >> So, what you think? > > Personally I would hate to see this anywhere near PHP. > > -Rasmus > > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php >