class Test

	shared

		def main
			assert .join<of int>('', [1, 2, 3]) == '123'
			assert .join<of String>(' ', ['a', 'b', 'c']) == 'a b c'
			assert .same<of int>(5) == 5
			assert .same<of Type>(Test) == Test
			Test().run  # test generic methods that aren't shared

		def join<of T>(separator as String, stuff as IEnumerable<of T>) as String
			sb = StringBuilder()
			sep = ''
			for item in stuff
				sb.append(sep)
				sb.append(if(item is nil, 'nil', item.toString))  # use the CobraImp or CobraCore.toString()
				sep = separator
			return sb.toString

		def same<of T>(t as T) as T  # test return value
			x as T = t  # use generic type in body
			return x

	def run
		i = 5
		j = 6
		.take2(i, j)
		.swap(inout i, inout j)
		assert i == 6 and j == 5

	def take2<of T>(a as T, b as T)
		pass

	def swap<of T>(a as inout T, b as inout T)  # generic method with inout args
		tmp = a
		a = b
		b = tmp