[Core] Add way to check if a signal has any connections

[AThousandShips]

Added to Object and Signal

Went with any_connected because it felt clear and direct as a description, could use has_connections too if desired

Will see about adding some unit tests for this but we don't have unit tests for is_connected so unsure how to approach that

Unsure if I need to do anything special on the C# side, looked at the Signal class and didn't see anything to add

• Closes: Add 'is_connected()' function without parameters to check if signal is connected godot-proposals#8912

[Mickeon]

Unsure about any_connected because it is more... "distorted" when reading through it in your own codebase, compared to has_connections. To me it does look fine as a Signal method (e.g. $Button.pressed.any_connected()), but not so much for Object ($Button.any_connected("pressed"))

[AThousandShips]

I'd prefer the name to be uniform on both, but I think there's no difference in reading is_connected on Object

[aaronfranke]

I think has_connections is clearer than any_connected. The latter seems like it would accept an array of Callables or a vararg of Callables.

[AThousandShips]

I'd say that both could be seen that way, but I'll change the naming from the consensus, I've got no strong feelings either way

[AThousandShips]

Might go with is_any_connected instead later, but we'll see

[ShlomiRex]

Suggestion:

Change current function is_connected(name) to is_connected_to(name)

Now you can also give the function any_connected() change to is_connected()

for more elegant naming

[Mickeon]

No changing existing function names, it would break compatibility.

[Mickeon]

Documentation is completely fine.

[akien-mga]

Thanks!

[AThousandShips]

Thank you!