method

superclass

v1_9_2_180 - Show latest stable - Class: Class
superclass()
public

Returns the superclass of class, or nil.

File.superclass          #=> IO
IO.superclass            #=> Object
Object.superclass        #=> BasicObject
class Foo; end
class Bar < Foo; end
Bar.superclass           #=> Foo

returns nil when the given class hasn’t a parent class:

BasicObject.superclass   #=> nil