feat: Impl Iterator::size_hint() for Dictionary (Closes: #560).

[tuto193]

The following Dictionary Iters now implement Iterator::size_hint():

• DictionaryIter (base for all others)
• Iter<'a>
• Keys<'a>
• TypedIter<'a, K, V>
• TypedKeys<'a, K>

[GodotRust]

API docs are being generated and will be shortly available at: https://godot-rust.github.io/docs/gdext/pr-583

[Bromeon]

Thank you, also for the tests! 🙂

[Bromeon]

An issue with indexes is that it's possible (although unlikely) that an element is added/removed while iterating (through a cloned dictionary). This problem also affects the size though.

size_hint doesn't have to be correct, which would allow such edge cases.

Maybe you can see if this can be reproduced in a separate itest? Clone dictionary, start iterating, add/remove key in the copy...

[tuto193]

An issue with indexes is that it's possible (although unlikely) that an element is added/removed while iterating (through a cloned dictionary). This problem also affects the size though.

size_hint doesn't have to be correct, which would allow such edge cases.

Maybe you can see if this can be reproduced in a separate itest? Clone dictionary, start iterating, add/remove key in the copy...

The test is a good way to see that size_hint() isn't always correct. Let me know, if this suffices! :)

[Bromeon]

Thanks a lot! One small thing remaining 🙂

[Bromeon]

Thanks a lot!