Gtk.ListBox should be iterable

[vixalien]

In GJS, it seems to be iterable. Might also be useful to know which other types are iterable.

See https://github.com/workbenchdev/demos/blob/3d05940216e007b4b3681d8a8d620d5aedcf73fb/src/Drag%20and%20Drop/main.js#L12

[vixalien]

I asked which types are known to be iterable in the GNOME JavaScript channel on Matrix, and I got a response from ptomato:

the iterable types are ones that explicitly have a [Symbol.iterator] method added in modules/core/overrides/*.js. we try to use that sparingly because depending on the type, it can be deceptively more expensive than it looks.

From a quick look, I found the following iterable types:

• Gio.ListStore
• Gio.FileEnumerator (also has an [Symbol.asyncIterator])
• Gtk.Widget

[hdonnay]

Relatedly, Gio.InputStream has createSyncIterator and createAsyncIterator: documentation

[JumpLink]

Hello @vixalien thanks for the issues, I am currently developing my own GNOME application in TypeScript in my limited free time to do the complete process to the finished application myself. As soon as I have a little more time or have finished the first release, I will concentrate more on ts-for-gir again