* lib/yaml/rubytypes.rb: support Rational and Complex as 1.8

  does.  a patch from Hiroshi Moriyama in [ruby-dev:36899].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20126 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 38 insertions, 0 deletions

diff --git a/lib/yaml/rubytypes.rb b/lib/yaml/rubytypes.rb
index 35b719196e..ae65b355e1 100644
--- a/lib/yaml/rubytypes.rb
+++ b/lib/yaml/rubytypes.rb
@@ -379,6 +379,44 @@ class Float
 	end
 end
 
+class Rational
+	yaml_as "tag:ruby.yaml.org,2002:object:Rational"
+	def Rational.yaml_new( klass, tag, val )
+		if val.is_a? String
+			Rational( val )
+		else
+			Rational( val['numerator'], val['denominator'] )
+		end
+	end
+	def to_yaml( opts = {} ) 
+		YAML::quick_emit( self, opts ) do |out|
+			out.map( taguri, nil ) do |map| 
+				map.add( 'denominator', denominator )
+				map.add( 'numerator', numerator )
+			end
+		end
+	end
+end
+
+class Complex
+	yaml_as "tag:ruby.yaml.org,2002:object:Complex"
+	def Complex.yaml_new( klass, tag, val )
+		if val.is_a? String
+			Complex( val )
+		else
+			Complex( val['real'], val['image'] )
+		end
+	end
+	def to_yaml( opts = {} )
+		YAML::quick_emit( self, opts ) do |out|
+			out.map( taguri, nil ) do |map|
+				map.add( 'image', imaginary )
+				map.add( 'real', real )
+			end
+		end
+	end
+end
+
 class TrueClass
     yaml_as "tag:yaml.org,2002:bool#yes"
 	def to_yaml( opts = {} )