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?
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