* complex.c (f_{add,mul,sub}): omitted some shortcuts for preserve

	  signed zero anyway.

	* complex.c (nucomp_negate): new.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19335 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 20 insertions, 0 deletions

diff --git a/test/ruby/test_complex.rb b/test/ruby/test_complex.rb
index ef612e2279..6f9cabb7b9 100644
--- a/test/ruby/test_complex.rb
+++ b/test/ruby/test_complex.rb
@@ -303,6 +303,16 @@ class Complex_Test < Test::Unit::TestCase
     assert_equal(Complex(-1,1), +Complex(-1,1))
     assert_equal(Complex(1,-1), +Complex(1,-1))
     assert_equal(Complex(-1,-1), +Complex(-1,-1))
+
+    if -0.0.to_s == '-0.0'
+      c = +Complex(0.0,0.0)
+      assert_equal('0.0', c.real.to_s)
+      assert_equal('0.0', c.image.to_s)
+
+      c = +Complex(-0.0,-0.0)
+      assert_equal('-0.0', c.real.to_s)
+      assert_equal('-0.0', c.image.to_s)
+    end
   end
 
   def test_negate
@@ -313,6 +323,16 @@ class Complex_Test < Test::Unit::TestCase
     assert_equal(Complex(-1,1), -Complex(1,-1))
     assert_equal(Complex(1,1), -Complex(-1,-1))
 
+    if -0.0.to_s == '-0.0'
+      c = -Complex(0.0,0.0)
+      assert_equal('-0.0', c.real.to_s)
+      assert_equal('-0.0', c.image.to_s)
+
+      c = -Complex(-0.0,-0.0)
+      assert_equal('0.0', c.real.to_s)
+      assert_equal('0.0', c.image.to_s)
+    end
+
 =begin
     assert_equal(0, Complex(0).negate)
     assert_equal(-2, Complex(2).negate)