Re: [RFC] Type hints

At 12:57 PM 5/9/2004 +0200, Derick Rethans wrote:

On Sun, 9 May 2004, Andi Gutmans wrote: I really would like to finalize this issue ASAP because it's the last *feature* I see for PHP 5.0. The main reason why I think we need to finalize it is because depending on the solution we choose, it would break BC if we fix it after 5.0. Consider the following options for a parameter with default value which allows null: MyClass $a or NULL = 5 MyClass $a = 5 or NULL MyClass or NULL $a = 5 I think all of these are pretty ugly and I don't feel comfortable with adding them to the language. The following (Zeev's idea) is much simpler and nicer, but I'm not 100% sure if this is the perfect solution: nullable MyClass $a = 5 null or MyClass $a = 5 ?

I don't like this. I think it's too long and ugly.

I've no idea what nullable is supposed to mean... (well, I do :) I was also wondering if the following would also work: class b extends a { } function foo (a $obj) { } $b = new b; foo($b); (ie, an inherited class also passes the hint check)

Yep. It's an instanceof check. Andi