1 files changed, 24 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/module/anonymous.rb b/activesupport/lib/active_support/core_ext/module/anonymous.rb
new file mode 100644
index 0000000000..df25a09ec9
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/module/anonymous.rb
@@ -0,0 +1,24 @@
+require 'active_support/core_ext/object/blank'
+
+class Module
+  # A module may or may not have a name.
+  #
+  #   module M; end
+  #   M.name # => "M"
+  #
+  #   m = Module.new
+  #   m.name # => ""
+  #
+  # A module gets a name when it is first assigned to a constant. Either
+  # via the +module+ or +class+ keyword or by an explicit assignment:
+  #
+  #   m = Module.new # creates an anonymous module
+  #   M = m          # => m gets a name here as a side-effect
+  #   m.name         # => "M"
+  #
+  def anonymous?
+    # Uses blank? because the name of an anonymous class is an empty
+    # string in 1.8, and nil in 1.9.
+    name.blank? 
+  end
+end