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

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28309 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Sun Jun 13 04:24:18 2010  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
+
+	* lib/delegate.rb: Delegate !=, eql? and hash [ruby-core:26139]
+
 Sun Jun 13 02:12:46 2010  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* enc/trans/utf8_mac.trans (buf_apply): fix for patterns

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.