From 0cd06fc1b9fcb21aacd006f4c7e2b7502131357c Mon Sep 17 00:00:00 2001
From: Timo Schilling <timo@schilling.io>
Date: Sun, 8 Nov 2015 00:14:45 +0100
Subject: [PATCH] Propose Uber::InheritableAttr::DSL

This allows thinks like:
```ruby
class Base
  extend Uber::InheritableAttr::DSL
  inheritable_attr :from
end
class User < Base
  from 'nick@example.org'
end
```
---
 lib/uber/inheritable_attr/dsl.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 lib/uber/inheritable_attr/dsl.rb

diff --git a/lib/uber/inheritable_attr/dsl.rb b/lib/uber/inheritable_attr/dsl.rb
new file mode 100644
index 0000000..461eabc
--- /dev/null
+++ b/lib/uber/inheritable_attr/dsl.rb
@@ -0,0 +1,14 @@
+module Uber::InheritableAttr::DSL
+  include Uber::InheritableAttr
+
+  def inheritable_attr(name, options={})
+    super
+    instance_eval %Q{
+      def #{name}(value = :__undefined)
+        return self.#{name} = value if value != :__undefined
+        return @#{name} if instance_variable_defined?(:@#{name})
+        @#{name} = InheritableAttribute.inherit_for(self, :#{name}, #{options})
+      end
+    }
+  end
+end