From 0b99ce1fd6276b8a0dd900ac95ac39c625e5448e Mon Sep 17 00:00:00 2001
From: tadf <tadf@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 28 Sep 2008 00:41:42 +0000
Subject: [PATCH] 	* lib/mathn.rb ({Fixnum,Bignum,Float}#**): may produce
 complex 	  value.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19603 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog    |  5 +++++
 lib/mathn.rb | 30 ++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index b840e97fae7d14..75a6b259633347 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Sep 28 09:39:48 2008  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* lib/mathn.rb ({Fixnum,Bignum,Float}#**): may produce complex
+	  value.
+
 Sun Sep 28 09:05:53 2008  James Edward Gray II  <jeg2@ruby-lang.org>
 
 	* lib/csv/csv.rb:  Worked around some minor encoding changes in Ruby
diff --git a/lib/mathn.rb b/lib/mathn.rb
index 401b162b4c3e43..486d487296da60 100644
--- a/lib/mathn.rb
+++ b/lib/mathn.rb
@@ -61,6 +61,16 @@ class Fixnum
   remove_method :/
   alias / quo
 
+  alias power! **
+
+  def ** (other)
+    if self < 0 && other.round != other
+      Complex(self, 0.0) ** other
+    else
+      power!(other)
+    end
+  end
+
   def_canon *(instance_methods - Object.methods - [:canon])
 
 end
@@ -69,6 +79,16 @@ class Bignum
   remove_method :/
   alias / quo
 
+  alias power! **
+
+  def ** (other)
+    if self < 0 && other.round != other
+      Complex(self, 0.0) ** other
+    else
+      power!(other)
+    end
+  end
+
   def_canon *(instance_methods - Object.methods - [:canon])
 
 end
@@ -261,4 +281,14 @@ class Float
 
   def_canon *(instance_methods - Object.methods - [:canon])
 
+  alias power! **
+
+  def ** (other)
+    if self < 0 && other.round != other
+      Complex(self, 0.0) ** other
+    else
+      power!(other)
+    end
+  end
+
 end