field_like_attr_accessor.rb

class Module
	def field(*args)
		args.each do |m|
		class_eval do 
			define_method("#{m}="){|a|
				instance_variable_set("@#{m}",a)
			}
			define_method("#{m}"){
				instance_variable_get("@#{m}")
			}			
		end	
		end
	end	
end

class Person
	field :name,:age
end	

a=Person.new
a.name="axgle"
a.age=25
p a
p a.instance_variable_get("@name")