Wait group for Godot

README.md

Inspired by the Counter here: https://webcache.googleusercontent.com/search?q=cache:lJGvIvNiIW0J:https://godotengine.org/qa/147012/join-multiple-coroutines-await-waits-only-single-coroutine&cd=12&hl=en&ct=clnk&gl=uk and Go's WaitGroup

example.gd

var animations := WaitGroup.new()
	
for child in get_children():
  var tween = child.create_tween()
  
  animations.add()
  tween.connect("finished", animations.done)
  tween.tween_property(child, "position:x", 10, 1)

await animations.finished
print("All animations finished!")

wait_group.gd

class_name WaitGroup
extends RefCounted

signal finished

var count: int = 0

func add() -> void:
	count += 1
	
func done() -> void:
	count = clamp(count - 1, 0, INF)
	
	if count == 0:
		finished.emit()