How do I call a super class method

Question

I have two classes A, and B. Class B overrides the foo method of class A. Class B has a bar method where I want to call the foo method of the super class. What is the syntax for such a call?

class A      def foo    "hello"  end     end   class B < A  def foo   super + " world"  end   def bar    # how to call the `foo` method of the super class?    # something similar to    super.foo  end end 

For class methods I can call the methods up the inheritance chain by explicitly prefixing the class name. I wonder if there is a similar idiom for instance methods.

class P  def self.x    "x"  end end  class Q < P  def self.x    super + " x"  end   def self.y    P.x  end end 

Edit My use case is general. For a specific case I know I can use alias technique. This is a common feature in Java or C++, so I am curious to know if it is possible to do this without adding extra code.

Answer 1

In Ruby 2.2, you can use Method#super_method now

For example:

class B < A   def foo     super + " world"   end    def bar     method(:foo).super_method.call   end end 

Ref: https://bugs.ruby-lang.org/issues/9781#change-48164 and https://www.ruby-forum.com/topic/5356938