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 <ras...@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
>
>
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