Is it possible to declare a callable type in IDL and add it to an arg of an interface method?

[Dominic Cabral]

My use case is that I'm trying to pass a callback as a an argument of a method within my interface, something like:

InitializeCallback = function {
    state: MyState;
    error: MyError;
}

my_interface = interface +c {
    initialize(callback: InitializeCallback);
}

If not, is there a plan to support it?

[Harald]

Your sample is not clear to me, except, it looks very java script like but that is a different domain.

You can already pass classes as callbacks today, and people do that.

[Dominic Cabral]

Let me try a better explanation. My C++ header that I'm trying to replicate via IDL has methods that require function callbacks as so:

    void initialize(const std::function<void(const MyState*, MyError)>& handler);

Is that a little more clear?

[Harald]

Please read this comment from @artwyman in the former dropbox repo , since I could not explain it better.
dropbox/djinni#425 (comment)
This has not changed, and very likely will not change in reasonable time (or ever if no one implements it)
Does this answer your question?

[Dominic Cabral]

It does, again, thanks for your quick response @a4z!