* lib/mathn.rb (Rational::power2): removed incomplete method.

see [ruby-dev:35195].   [ruby-core:17293]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@17545 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Mon Jun 23 11:31:41 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* lib/mathn.rb (Rational::power2): removed incomplete method.
+	  see [ruby-dev:35195].   [ruby-core:17293]
+
 Sun Jun 22 14:16:28 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/readline/extconf.rb (have_readline_func): readline on Mac OS X

lib/mathn.rb

@@ -183,50 +183,6 @@ class Rational
       x ** y
     end
   end
-
-  def power2(other)
-    if other.kind_of?(Rational)
-      if self < 0
-	return Complex.__send__(:new!, self, 0) ** other
-      elsif other == 0
-	return Rational(1,1)
-      elsif self == 0
-	return Rational(0,1)
-      elsif self == 1
-	return Rational(1,1)
-      end
-      
-      dem = nil
-      x = self.denominator.to_f.to_i
-      neard = self.denominator.to_f ** (1.0/other.denominator.to_f)
-      loop do
-	if (neard**other.denominator == self.denominator)
-	  dem = neard
-	  break
-	end
-      end
-      nearn = self.numerator.to_f ** (1.0/other.denominator.to_f)
-      Rational(num,den)
-      
-    elsif other.kind_of?(Integer)
-      if other > 0
-	num = numerator ** other
-	den = denominator ** other
-      elsif other < 0
-	num = denominator ** -other
-	den = numerator ** -other
-      elsif other == 0
-	num = 1
-	den = 1
-      end
-      Rational(num, den)
-    elsif other.kind_of?(Float)
-      Float(self) ** other
-    else
-      x , y = other.coerce(self)
-      x ** y
-    end
-  end
 end
 
 module Math