module Equatable

Hook into module inclusion.

@param [Module] base

the module or class including Equatable

@return [self]

@api private

# File lib/equatable.rb, line 14
def self.included(base)
  super
  base.extend(self)
  base.class_eval do
    include Methods
    define_methods
  end
end

Objects that include this module are assumed to be value objects. It is also assumed that the only values that affect the results of equality comparison are the values of the object's attributes.

@param [Array<Symbol>] *args

@return [undefined]

@api public

# File lib/equatable.rb, line 39
def attr_reader(*args)
  super
  comparison_attrs.concat(args)
end

Copy the #comparison_attrs into the subclass.

@param [Class] subclass

@api private

# File lib/equatable.rb, line 49
def inherited(subclass)
  super
  subclass.instance_variable_set(:@comparison_attrs, comparison_attrs.dup)
end