From dc3d6eb9b4aaed051dd6d5a5a07f6c66b72da4c4 Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Tue, 15 Feb 2005 15:57:44 +0000
Subject: Moved Active Support into its own gem

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@624 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 .../active_support/module_attribute_accessors.rb   | 57 ++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 activesupport/lib/active_support/module_attribute_accessors.rb

(limited to 'activesupport/lib/active_support/module_attribute_accessors.rb')

diff --git a/activesupport/lib/active_support/module_attribute_accessors.rb b/activesupport/lib/active_support/module_attribute_accessors.rb
new file mode 100644
index 0000000000..3d466e4493
--- /dev/null
+++ b/activesupport/lib/active_support/module_attribute_accessors.rb
@@ -0,0 +1,57 @@
+# 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
+        if ! defined? @@#{sym.id2name}
+          @@#{sym.id2name} = nil
+        end
+        
+        def self.#{sym.id2name}
+          @@#{sym}
+        end
+
+        def #{sym.id2name}
+          @@#{sym}
+        end
+
+        def call_#{sym.id2name}
+          case @@#{sym.id2name}
+            when Symbol then send(@@#{sym})
+            when Proc   then @@#{sym}.call(self)
+            when String then @@#{sym}
+            else nil
+          end
+        end
+      EOS
+    end
+  end
+  
+  def mattr_writer(*syms)
+    syms.each do |sym|
+      class_eval <<-EOS
+        if ! defined? @@#{sym.id2name}
+          @@#{sym.id2name} = nil
+        end
+        
+        def self.#{sym.id2name}=(obj)
+          @@#{sym.id2name} = obj
+        end
+
+        def self.set_#{sym.id2name}(obj)
+          @@#{sym.id2name} = obj
+        end
+
+        def #{sym.id2name}=(obj)
+          @@#{sym} = obj
+        end
+      EOS
+    end
+  end
+  
+  def mattr_accessor(*syms)
+    mattr_reader(*syms)
+    mattr_writer(*syms)
+  end
+end
\ No newline at end of file
-- 
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