Re: [Vala] Understanding object creation (and other things)

["Phil Housley" <undeconstructed gmail com>]

> The only sensible possibility to make this simpler would be to allow
> accessing the construction parameters in the constructor, maybe
> something like that:
>
> class Mul {
>         private int answer;
>
>         public int get_answer() {
>                 return answer;
>         }
>
>         public void set_terms(int x, int y) {
>                 answer = x * y;
>         }
>
>         public Mul(construct int x, construct int y) {
>         }
>
>         // implicitly declare construct-only parameters x and y
>         // with a default value of -1
>         construct (int x = -1, int y = -1) {
>                 set_terms(x, y)
>         }
> }
>
> Would something like that make sense?

It does to me.  In fact, that seems to bridge most of the gap between
Vala syntax and other languages.  What I do worry about, is that it
doesn't help to really clarify a correct method for doing this sort of
thing.  I'm sure when there is some documentation it will be a lot
easier, but at the moment it's very hard to feel sure about things
like what functions will be called when creating a subclass.

> The way I'd implement such a class currently is by using a helper method
> for construction - assuming that you don't want to create instances of
> subtypes in the same manner.

That's definitely an option in this case.  The problem is of course as
you said, inheritence...

> Jürg


--
Phil Housley