Functions with variable-length argument lists

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function test(x:Int = null , y:Int = null , z:Int = null , t:Int = null)
	if X <> null print X
	if Y <> null print Y
	if Z <> null print Z
	if t <> null print t
end function

test(1)
test(1 , 2)
test(1 , 2 , 3)
test(1,2,3,4)