1 files changed, 53 insertions, 0 deletions
diff --git a/ruby_1_9_3/ext/psych/lib/psych/nodes/node.rb b/ruby_1_9_3/ext/psych/lib/psych/nodes/node.rb
new file mode 100644
index 0000000000..0cefe44e44
--- /dev/null
+++ b/ruby_1_9_3/ext/psych/lib/psych/nodes/node.rb
@@ -0,0 +1,53 @@
+require 'stringio'
+
+module Psych
+  module Nodes
+    ###
+    # The base class for any Node in a YAML parse tree.  This class should
+    # never be instantiated.
+    class Node
+      include Enumerable
+
+      # The children of this node
+      attr_reader :children
+
+      # An associated tag
+      attr_reader :tag
+
+      # Create a new Psych::Nodes::Node
+      def initialize
+        @children = []
+      end
+
+      ###
+      # Iterate over each node in the tree. Yields each node to +block+ depth
+      # first.
+      def each &block
+        return enum_for :each unless block_given?
+        Visitors::DepthFirst.new(block).accept self
+      end
+
+      ###
+      # Convert this node to Ruby.
+      #
+      # See also Psych::Visitors::ToRuby
+      def to_ruby
+        Visitors::ToRuby.new.accept self
+      end
+      alias :transform :to_ruby
+
+      ###
+      # Convert this node to YAML.
+      #
+      # See also Psych::Visitors::Emitter
+      def yaml io = nil, options = {}
+        real_io = io || StringIO.new(''.encode('utf-8'))
+
+        Visitors::Emitter.new(real_io, options).accept self
+        return real_io.string unless io
+        io
+      end
+      alias :to_yaml :yaml
+    end
+  end
+end