From 01b1a8772928fbf31180341356981b95d0581413 Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Sun, 29 Jan 2006 00:37:39 +0000
Subject: Added reusable reloading support through the inclusion of the
 Relodable module that all subclasses of ActiveRecord::Base,
 ActiveRecord::Observer, ActiveController::Base, and ActionMailer::Base
 automatically gets [DHH]. Added auto-loading support for classes in modules,
 so Conductor::Migration will look for conductor/migration.rb and
 Conductor::Database::Settings will look for conductor/database/settings.rb
 [Nicholas Seckar]. Refactored extensions to module, class, and object in
 active support [DHH]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3493 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 .../active_support/core_ext/object/extending.rb    | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 activesupport/lib/active_support/core_ext/object/extending.rb

(limited to 'activesupport/lib/active_support/core_ext/object/extending.rb')

diff --git a/activesupport/lib/active_support/core_ext/object/extending.rb b/activesupport/lib/active_support/core_ext/object/extending.rb
new file mode 100644
index 0000000000..8c638f83c2
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/object/extending.rb
@@ -0,0 +1,45 @@
+class Object #:nodoc:
+  def remove_subclasses_of(*superclasses)
+    subclasses_of(*superclasses).each do |subclass|
+      Object.send(:remove_const, subclass.to_s) rescue nil
+    end
+  end
+
+  def subclasses_of(*superclasses)
+    subclasses = []
+    ObjectSpace.each_object(Class) do |k|
+      next if (k.ancestors & superclasses).empty? || superclasses.include?(k) || k.to_s.include?("::") || subclasses.include?(k)
+      subclasses << k
+    end
+    subclasses
+  end
+  
+  def extended_by
+    ancestors = class << self; ancestors end
+    ancestors.select { |mod| mod.class == Module } - [ Object, Kernel ]
+  end
+  
+  def copy_instance_variables_from(object, exclude = [])
+    exclude += object.protected_instance_variables if object.respond_to? :protected_instance_variables
+    
+    instance_variables = object.instance_variables - exclude.map { |name| name.to_s }
+    instance_variables.each { |name| instance_variable_set(name, object.instance_variable_get(name)) }
+  end
+  
+  def extend_with_included_modules_from(object)
+    object.extended_by.each { |mod| extend mod }
+  end
+
+  def instance_values
+    instance_variables.inject({}) do |values, name|
+      values[name[1..-1]] = instance_variable_get(name)
+      values
+    end
+  end
+  
+  unless defined? instance_exec # 1.9
+    def instance_exec(*arguments, &block)
+      block.bind(self)[*arguments]
+    end
+  end
+end
\ No newline at end of file
-- 
cgit v1.2.3