instance method

BasicObject#singleton_method_undefined

(::Symbol name) -> nil

singleton_method_undefined(symbol)

#define rb_obj_singleton_method_undefined rb_obj_dummy1

Invoked as a callback whenever a singleton method is undefined in the receiver.

Example

module Chatty
  def Chatty.singleton_method_undefined(id)
    puts "Undefining #{id.id2name}"
  end
  def Chatty.one()   end
  class << self
     undef_method(:one)
  end
end

produces:

Example

Undefining one

See also #singleton_method_removed #singleton_method_added also in 4.1 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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