C# - Can't get method on CallableCustom "Delegate::Invoke".

[ryan-linehan]

Issue: When registering a named bound anonymous function like referenced below godot will throw an error:

E 0:00:00:729 util.gd:34 @ get_method_info(): Can't get method on CallableCustom "Delegate::Invoke".
<C++ Error> Method/function failed. Returning: StringName()
<C++ Source> core/variant/callable.cpp:454 @ get_method()
util.gd:34 @ get_method_info()
limbo_console.gd:978 @ _validate_callable()
limbo_console.gd:284 @ register_command()

which links to here on the godot repo: https://github.com/godotengine/godot/blob/49a5bc7b616bd04689a2c89e89bda41f50241464/core/variant/callable.cpp#L454

I researched any work-arounds I could find:

• use string interpolation like so print("%s" % [p_callable]) the resulting string will be something like <class>(script)::<anonymous_func_name> and if the callable is a custom callable we can get their method name from there and trim everything until the ::?
• Reduce the amount of errors being thrown by altering the loop in util.gd get_method_info to only call p_callable.get_method() once instead of every time in the loop
• Wait until there is a fix on the following issue Can't get method on CallableCustom "Delegate::Invoke" error when using a lambda function in UndoRedo.AddDoMethod and UndoRedo.AddUndoMethod godotengine/godot#90430

Luckily functionally the plug-in works as expected still its just an annoyance for errors when registering and running commands

Unfortunately after reviewing the bug in depth more it seems to be related to:

godotengine/godot#90430

The closest I can get to getting the callables name without the error throwing is by using the following:

which was registered as such:

func _ready() -> void:
	LimboConsole.register_command(multiply.bind(52).bind(3), "m4")

func multiply(a: float, b: float) -> void:
	LimboConsole.info("a * b: " + str(a * b))

I'm not certain we want to code for this explicitly and maybe just wait for the godot issue linked above to be fixed. Perhaps we should open a separate issue to track this?

Originally posted by @RcubDev in #59

[ryan-linehan]

One thing to note is that you wouldn't really bind this way in a true c# project as you'd use lambdas instead as the docs recommend:

https://docs.godotengine.org/en/stable/tutorials/scripting/c_sharp/c_sharp_differences.html#callable

but the binding is happening in gdscript so I think it is worth keeping an issue around for

EDIT: Actually never mind you still will use Callable.From to register anonymous lamda functions so this still affects c# users