* ext/psych/lib: moved external library dependent files from lib.

  [ruby-core:29129]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27112 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 41 insertions, 0 deletions

diff --git a/ext/psych/lib/psych/visitors/emitter.rb b/ext/psych/lib/psych/visitors/emitter.rb
new file mode 100644
index 0000000000..0768fbb528
--- /dev/null
+++ b/ext/psych/lib/psych/visitors/emitter.rb
@@ -0,0 +1,41 @@
+module Psych
+  module Visitors
+    class Emitter < Psych::Visitors::Visitor
+      def initialize io
+        @handler = Psych::Emitter.new io
+      end
+
+      def visit_Psych_Nodes_Stream o
+        @handler.start_stream o.encoding
+        o.children.each { |c| accept c }
+        @handler.end_stream
+      end
+
+      def visit_Psych_Nodes_Document o
+        @handler.start_document o.version, o.tag_directives, o.implicit
+        o.children.each { |c| accept c }
+        @handler.end_document o.implicit_end
+      end
+
+      def visit_Psych_Nodes_Scalar o
+        @handler.scalar o.value, o.anchor, o.tag, o.plain, o.quoted, o.style
+      end
+
+      def visit_Psych_Nodes_Sequence o
+        @handler.start_sequence o.anchor, o.tag, o.implicit, o.style
+        o.children.each { |c| accept c }
+        @handler.end_sequence
+      end
+
+      def visit_Psych_Nodes_Mapping o
+        @handler.start_mapping o.anchor, o.tag, o.implicit, o.style
+        o.children.each { |c| accept c }
+        @handler.end_mapping
+      end
+
+      def visit_Psych_Nodes_Alias o
+        @handler.alias o.anchor
+      end
+    end
+  end
+end