Inheritance module_eval

Allows to create methods with same name inside particular class/object by pushing them down by inheritance tree.
So method "field" may call other "field" in same class by calling super keyword instead of just redefine it.

gem install inheritance_module_eval

Inheritance module_eval provides 2 methods for eval instance and class methods:

• instance_eval_on

• class_eval_on

  InheritanceModuleEval.instance_eval_on(instance_object, code = nil, &block) #method used to eval instance methods (ie: methods of an object) InheritanceModuleEval.class_eval_on(class_object, code = nil, &block) #method used to eval class methods (ie: methods of an class)

Note: you may include

require "inheritance_module_eval/integration"

to intergate inheritance_module_eval in ruby core. That will give 2 methods:

• instance_module_eval(code = nil, &block)
• class_module_eval(code = nil, &block)

Below is some simple example of inheritance_module_eval usage:

require 'inheritance_module_eval'
require "inheritance_module_eval/integration"

# Some dummy class that uses #instance_module_eval
class Content
  # defines simple getter and setter
  self.field(name)
    instance_module_eval %{
      def #{name}
        @#{name}
      end

      def #{name}=(new_value)
        @#{name}= new_value
      end
    }
    end
  end
end


class Article < Content
  field :title
  field :content
  field :etc

  # you desided, that title for article should be titelized
  # from now you dont need to call alias_method or reimplement method anymore!
  # you can use inheritance!
  # make it simple
  def title
    super.to_s.titelize
  end
end

none

rspec2 for testing

tested with Ruby

• 1.8.7
• 1.9.2
• 1.9.3
• jruby-19mode
• jruby-18mode
• rbx-19mode
• rbx-18mode
• ruby-head
• ree

see build history

see contributing guide

Copyright © 2011-2012 Alexander N Paramonov. Released under the MIT License. See the LICENSE file for further details.