Merge pull request #82808 from dalexeev/gds-vararg

GDScript: Add support for variadic functions

modules/gdscript/tests/scripts/runtime/features/abstract_methods.gd

@@ -4,6 +4,7 @@ abstract class A:
 
 	# No `UNUSED_PARAMETER` warning.
 	abstract func func_with_param(param: int) -> int
+	abstract func func_with_rest_param(...args: Array) -> int
 	abstract func func_with_semicolon() -> int;
 	abstract func func_1() -> int; abstract func func_2() -> int
 	abstract func func_without_return_type()
@@ -23,6 +24,7 @@ class C extends B:
 		return "text_2c"
 
 	func func_with_param(param: int) -> int: return param
+	func func_with_rest_param(...args: Array) -> int: return args.size()
 	func func_with_semicolon() -> int: return 0
 	func func_1() -> int: return 0
 	func func_2() -> int: return 0

modules/gdscript/tests/scripts/runtime/features/variadic_functions.gd

@@ -0,0 +1,38 @@
+class A:
+	func f(x: int) -> void:
+		print(x)
+
+class B extends A:
+	func f(x: int, ...args: Array) -> void:
+		prints(x, args)
+
+class C extends B:
+	func f(x: int, y: int = 0, ...args: Array) -> void:
+		prints(x, y, args)
+
+class D extends C:
+	func f(...args: Array) -> void:
+		print(args)
+
+func test_func(x: int, y: int = 0, ...args: Array) -> void:
+	prints(x, y, args)
+
+var test_lambda := func (x: int, y: int = 0, ...args: Array) -> void:
+	prints(x, y, args)
+
+func test():
+	for method in get_method_list():
+		if str(method.name).begins_with("test_"):
+			print(Utils.get_method_signature(method))
+
+	test_func(1)
+	test_func(1, 2)
+	test_func(1, 2, 3)
+	test_func(1, 2, 3, 4)
+	test_func(1, 2, 3, 4, 5)
+
+	test_lambda.call(1)
+	test_lambda.call(1, 2)
+	test_lambda.call(1, 2, 3)
+	test_lambda.call(1, 2, 3, 4)
+	test_lambda.call(1, 2, 3, 4, 5)

modules/gdscript/tests/scripts/runtime/features/variadic_functions.out

@@ -0,0 +1,12 @@
+GDTEST_OK
+func test_func(x: int, y: int = 0, ...args) -> void
+1 0 []
+1 2 []
+1 2 [3]
+1 2 [3, 4]
+1 2 [3, 4, 5]
+1 0 []
+1 2 []
+1 2 [3]
+1 2 [3, 4]
+1 2 [3, 4, 5]