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module · Ruby 3.2

SingleForwardable

6 instance methods

SingleForwardable can be used to setup delegation at the object level as well.

Example

printer = String.new
printer.extend SingleForwardable        # prepare object for delegation
printer.def_delegator "STDOUT", "puts"  # add delegation for STDOUT.puts()
printer.puts "Howdy!"

Also, SingleForwardable can be used to set up delegation for a Class or Module.

Example

class Implementation
  def self.service
    puts "serviced!"
  end
end

module Facade
  extend SingleForwardable
  def_delegator :Implementation, :service
end

Facade.service #=> serviced!

If you want to use both Forwardable and SingleForwardable, you can use methods def_instance_delegator and def_single_delegator, etc.

Instance methods 6

#def_delegator #def_delegators #def_single_delegator #def_single_delegators #delegate #single_delegate