On 07/06/2012 08:56 AM, andreas graeper wrote:
> following compiles without warning/error but at runtime it tells me
> (process:6285): GLib-GObject-WARNING **: cannot add interface type
> `JJJ' to type `BBB' which does not conform to prerequisite `III'
>
> [snip]
>
> is there actually need to declare all interfaces in class-declaration, i.e.
> interface i1 {} ; interface i2:i1 {} ... interface i99:i98 {}
> class C : i99,...,i1 {}
> ???
Yes, you need to declare all interfaces. This is the way Vala and
GObject were designed.
The order in which you list interfaces in the class declaration matters:
class BBB : AAA,III,JJJ {
will work.
This is arguably a (minor) bug. It was reported last year:
https://bugzilla.gnome.org/show_bug.cgi?id=656204
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