From 4e968660ee0e903f82ea7c6c79ebbaadb87edce2 Mon Sep 17 00:00:00 2001
From: marcandre <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 12 Jun 2010 19:28:54 +0000
Subject: Backport revision 28309:

* lib/delegate.rb: Delegate !=, eql? and hash [ruby-core:26139]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@28310 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/delegate.rb | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

(limited to 'lib')

diff --git a/lib/delegate.rb b/lib/delegate.rb
index dead782bbb..2c1db88a75 100644
--- a/lib/delegate.rb
+++ b/lib/delegate.rb
@@ -117,7 +117,7 @@
 class Delegator < BasicObject
   kernel = ::Kernel.dup
   kernel.class_eval do
-    [:to_s,:inspect,:=~,:!~,:===,:<=>].each do |m|
+    [:to_s,:inspect,:=~,:!~,:===,:<=>,:eql?,:hash].each do |m|
       undef_method m
     end
   end
@@ -187,13 +187,25 @@ class Delegator < BasicObject
   # Note: no need to specialize private_methods, since they are not forwarded
 
   #
-  # Returns true if two objects are considered same.
+  # Returns true if two objects are considered of equal value.
   #
   def ==(obj)
     return true if obj.equal?(self)
     self.__getobj__ == obj
   end
 
+  #
+  # Returns true if two objects are not considered of equal value.
+  #
+  def !=(obj)
+    return false if obj.equal?(self)
+    __getobj__ != obj
+  end
+
+  def !
+    !__getobj__
+  end
+
   #
   # This method must be overridden by subclasses and should return the object
   # method calls are being delegated to.
-- 
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