object.c: Module#singleton_class?

* object.c (rb_mod_singleton_p): new method Module#singleton_class? to
  return whether the receiver is a singleton class or not.
  [ruby-core:51087] [Feature #7609]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42449 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 0ee63b446e..cd7cad8436 100644
--- a/NEWS
+++ b/NEWS
@@ -41,6 +41,8 @@ with all sufficient information, see the ChangeLog file.
   * New methods:
     * Module#using, which activates refinements of the specified module only
       in the current class or module definition.
+    * Module#singleton_class? returns true if the receiver is a singleton class
+      or false if it is an ordinary class or module.
   * extended methods:
     * Module#refine is no longer experimental.