"""
combinations:

(list-of, array-of, set-of, array-list, enumerable) + (list-of, array-of, set-of, array-list, enumerable)

"""


class Test

	def main
		.basic
		.subclass1
		.subclass2
		.listPlusArray
		.augment
	
	def basic
		t1 = ['a', 'b']
		t2 = ['c']
		t3 = t1 + t2
		assert t3 == ['a', 'b', 'c']
		assert t3 is not (t1 + t2)
		assert t3 is not (t1 + t2)
	
	def subclass1
		t1 = MyList<of int>()
		t1.add(1)
		t2 = [2, 3]
		t3 = t1 + t2
		assert t3 inherits MyList<of int>  # .warning. expression is always of type
		assert t3 == [1, 2, 3]

	def subclass2
		t1 = [1, 2]
		t2 = MyList<of int>()
		t2.add(3)
		t3 = t1 + t2
		assert t3 inherits List<of int>  # .warning. expression is always of type
		assert not t3 inherits MyList<of int>
		assert t3 == [1, 2, 3]

	def listPlusArray
		pass
/#
		t1 = [1, 2]
		t2 = @[3, 4]
		t3 = t1 + t2
		assert t3 inherits List<of int>
		assert t3 == [1, 2, 3, 4]
#/

	def augment
		t = [1, 2]
		t += [3, 4]
		assert t == [1, 2, 3, 4]


class MyList<of T> inherits List<of T>

	pass