sig Foo(i as int) as int

class X

	def main is shared
		X().run
	
	def run
		foos = List<of Foo>()
		foos.add(ref .sameValue)
		foos.add(ref .double)
		assert foos[0](5) == 5

	def sameValue(i as int) as int
		return i

	def double(i as int) as int
		return i * 2