* lib/mathn.rb (Prime#each): returns an enumerator if no block

given. [ruby-dev:32815]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14970 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Wed Jan  9 22:04:17 2008  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* lib/mathn.rb (Prime#each): returns an enumerator if no block
+	  given. [ruby-dev:32815]
+
 Wed Jan  9 22:03:26 2008  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* encoding.c (rb_enc_replicate): replica of dummy is a dummy.

lib/mathn.rb

@@ -101,6 +101,7 @@ class Prime
   alias next succ
 
   def each
+    return to_enum(:each) unless block_given?
     loop do
       yield succ
     end