Re: [Vala] How to check if GLib.List is empty?

[Luca Bruno <lethalman88 gmail com>]

On 02/12/2014 16:34, Виталий Кирсанов wrote:
> Hm, indeed. The following piece of code works fine:
>
> int main(string[] argv)
> {
>     List<string> list = new List<string>();
>     assert( list == null );
>     return 0;
> }
>
>
> So this seems to be the answer to my question. But still there are two
> weird things in my opinion:
>
>    - Why I need to call operator new if the result value is still null?
>    Can't I simply declare a reference List<string> list; and then call e.g.
>    append()?
Yes, you can. "new List()" is just "null".
>    - I thought that only references appended with question mark sign (e.g.
>    List<string>?) can be null, cant' they?
There are several exceptions due to historical reasons. Null is quite
weak in Vala by default in several places.
There's an experimental non-null flag for valac, but that's not much
worked on.

Best regards,