Minimum configurable Ruby class

min-conf.rb

# Goals
# 1. Small class configurable with a block
# 2. puts settings in a ruby Struct

require 'Forwardable'

class Settable
  extend Forwardable
  def_delegator :@config, :foo
  def_delegator :@config, :bar
  def initialize(&settings)
    @config = Struct.new(:foo, :bar).new
    settings.call(@config) if settings
    @config.freeze
  end
end

# TODO: try with a different delegator
# FIXME: try not to expose `config' class