Contents

require 'active_support/core_ext/array/extract_options'

class Module
  def mattr_reader(*syms)
    options = syms.extract_options!
    syms.each do |sym|
      class_eval(<<-EOS, __FILE__, __LINE__ + 1)
        unless defined? @@#{sym}
          @@#{sym} = nil
        end

        def self.#{sym}
          @@#{sym}
        end
      EOS
      
      unless options[:instance_reader] == false
        class_eval(<<-EOS, __FILE__, __LINE__ + 1)
          def #{sym}
            @@#{sym}
          end
        EOS
      end
    end
  end

  def mattr_writer(*syms)
    options = syms.extract_options!
    syms.each do |sym|
      class_eval(<<-EOS, __FILE__, __LINE__ + 1)
        unless defined? @@#{sym}
          @@#{sym} = nil
        end

        def self.#{sym}=(obj)
          @@#{sym} = obj
        end
      EOS

      unless options[:instance_writer] == false
        class_eval(<<-EOS, __FILE__, __LINE__ + 1)
          def #{sym}=(obj)
            @@#{sym} = obj
          end
        EOS
      end
    end
  end

  # Extends the module object with module and instance accessors for class attributes,
  # just like the native attr* accessors for instance attributes.
  #
  #  module AppConfiguration
  #    mattr_accessor :google_api_key
  #    self.google_api_key = "123456789"
  #
  #    mattr_accessor :paypal_url
  #    self.paypal_url = "www.sandbox.paypal.com"
  #  end
  #
  #  AppConfiguration.google_api_key = "overriding the api key!"
  def mattr_accessor(*syms)
    mattr_reader(*syms)
    mattr_writer(*syms)
  end
end

Version data entries

10 entries across 10 versions & 2 rubygems

Version	Path
csd-0.1.5	lib/active_support/core_ext/module/attribute_accessors.rb
csd-0.1.4	lib/active_support/core_ext/module/attribute_accessors.rb
csd-0.1.3	lib/active_support/core_ext/module/attribute_accessors.rb
csd-0.1.2	lib/active_support/core_ext/module/attribute_accessors.rb
csd-0.1.1	lib/active_support/core_ext/module/attribute_accessors.rb
csd-0.1.0	lib/active_support/core_ext/module/attribute_accessors.rb
csd-0.0.16	lib/active_support/core_ext/module/attribute_accessors.rb
activesupport-3.0.0.beta4	lib/active_support/core_ext/module/attribute_accessors.rb
activesupport-3.0.0.beta3	lib/active_support/core_ext/module/attribute_accessors.rb
activesupport-3.0.0.beta2	lib/active_support/core_ext/module/attribute_accessors.rb