1 files changed, 44 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb b/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb
new file mode 100644
index 0000000000..fe4f8a4fc0
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb
@@ -0,0 +1,44 @@
+# Extends the module object with module and instance accessors for class attributes, 
+# just like the native attr* accessors for instance attributes.
+class Module # :nodoc:
+  def mattr_reader(*syms)
+    syms.each do |sym|
+      class_eval(<<-EOS, __FILE__, __LINE__)
+        unless defined? @@#{sym}
+          @@#{sym} = nil
+        end
+        
+        def self.#{sym}
+          @@#{sym}
+        end
+
+        def #{sym}
+          @@#{sym}
+        end
+      EOS
+    end
+  end
+  
+  def mattr_writer(*syms)
+    syms.each do |sym|
+      class_eval(<<-EOS, __FILE__, __LINE__)
+        unless defined? @@#{sym}
+          @@#{sym} = nil
+        end
+        
+        def self.#{sym}=(obj)
+          @@#{sym} = obj
+        end
+
+        def #{sym}=(obj)
+          @@#{sym} = obj
+        end
+      EOS
+    end
+  end
+  
+  def mattr_accessor(*syms)
+    mattr_reader(*syms)
+    mattr_writer(*syms)
+  end
+end