class X

	def main is shared
		pass
	
	def Upper  # .error. lowercase
		pass

	def foo(_arg as int)  # .error. Parameter declarations cannot start with an underscore. Those are reserved for class variables. Try "arg".
		pass

	def bar(X as int)     # .error. Parameter declarations must start with a lowercase letter to distinguish them from other types of identifiers. Try "x".
		pass
	
	def baz(Xy as int)    # .error. Parameter declarations must start with a lowercase letter to distinguish them from other types of identifiers. Try "xy".
		pass