Class: Module

Inherits:
Object
  • Object
show all
Defined in:
lib/defaultinator.rb

Instance Method Summary collapse

Instance Method Details

#__original_attr_accessor ⇒ Object

todo: figure out how to mix this in as a module slightly nicer



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# File 'lib/defaultinator.rb', line 5

alias_method :__original_attr_accessor, :attr_accessor

#__original_attr_reader ⇒ Object 



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# File 'lib/defaultinator.rb', line 13

alias_method :__original_attr_reader, :attr_reader

#attr_accessor(*args) ⇒ Object 



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# File 'lib/defaultinator.rb', line 6

def attr_accessor *args
  return send(:__original_attr_accessor, *args) unless args.last.is_a?(Hash)
  *method_names, method_options = args
  attr_reader(*method_names, method_options)
  attr_writer(*method_names)
end

#attr_reader(*args) ⇒ Object 



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# File 'lib/defaultinator.rb', line 14

def attr_reader *args
  # Hand-off if no options for us to be clever with
  return send(:__original_attr_reader, *args) unless args.last.is_a?(Hash)

  *method_names, method_options = args

  # Hand-off if no defaults or if the default is nil, because that's the ruby runtime default too.
  return send(:__original_attr_reader, *method_names) unless method_options.has_key?(:default) && method_options[:default] != nil

  method_names.uniq.each do |name|
    instance_name = "@#{name}".to_sym
    # @foo ||= {}
    define_method(name) do
      instance_variable_defined?(instance_name) && instance_variable_get(instance_name) || instance_variable_set(instance_name, method_options[:default])
    end
  end
end