tadf	2009-06-09 22:43:49 +0900 (Tue, 09 Jun 2009)

  New Revision: 23658

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=23658

  Log:
    * lib/cmath.rb (log10): raised exception when the given number is
      a negative real.

  Modified files:
    trunk/ChangeLog
    trunk/lib/cmath.rb

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 23657)
+++ ChangeLog	(revision 23658)
@@ -1,3 +1,8 @@
+Tue Jun  9 22:38:09 2009  Tadayoshi Funaba  <tadf@d...>
+
+	* lib/cmath.rb (log10): raised exception when the given number is
+	  a negative real.
+
 Tue Jun  9 15:13:14 2009  Nobuyoshi Nakada  <nobu@r...>
 
 	* dir.c (dir_s_glob): fixed rdoc.  a patch from Joseph Pecoraro a
Index: lib/cmath.rb
===================================================================
--- lib/cmath.rb	(revision 23657)
+++ lib/cmath.rb	(revision 23658)
@@ -47,7 +47,7 @@
   end
 
   def log10(z)
-    if z.real?
+    if z.real? and z >= 0
       log10!(z)
     else
       log(z) / log!(10)

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