Is the current Ruby method called via super?

Question

Within a method at runtime, is there a way to know if that method has been called via super in a subclass? E.g.

module SuperDetector
  def via_s         


        

Answer 1

There is probably a better way, but the general idea is that Object#instance_of? is restricted only to the current class, rather than the hierarchy:

module SuperDetector
  def self.included(clazz)
    clazz.send(:define_method, :via_super?) do
      !self.instance_of?(clazz)
    end
  end
end

class Foo
  include SuperDetector

  def bar
    via_super? ? 'super!' : 'nothing special'
  end
end

class Fu < Foo
  def bar
    super
  end
end

Foo.new.bar # => "nothing special"
Fu.new.bar  # => "super!"

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However, note that this doesn't require explicit super in the child. If the child has no such method and the parent's one is used, via_super? will still return true. I don't think there is a way to catch only the super case other than inspecting the stack trace or the code itself.