* ext/psych/lib/psych/streaming.rb: refactor streaming methods to a

  module.
* ext/psych/lib/psych/stream.rb: extracted streaming specific methods
  to a module.
* ext/psych/lib/psych/json/stream.rb: JSON stream inherits from
  JSONTree and includes streaming methods.
* ext/psych/lib/psych/visitors/json_tree.rb: JSON does not support
  object references, so remove object reference testing when building
  JSON trees.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30936 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 22 insertions, 0 deletions

diff --git a/ext/psych/lib/psych/streaming.rb b/ext/psych/lib/psych/streaming.rb
new file mode 100644
index 0000000000..c6fa109d5a
--- /dev/null
+++ b/ext/psych/lib/psych/streaming.rb
@@ -0,0 +1,22 @@
+module Psych
+  module Streaming
+    ###
+    # Create a new streaming emitter.  Emitter will print to +io+.  See
+    # Psych::Stream for an example.
+    def initialize io
+      super({}, self.class.const_get(:Emitter).new(io))
+    end
+
+    ###
+    # Start streaming using +encoding+
+    def start encoding = Nodes::Stream::UTF8
+      super.tap { yield self if block_given?  }
+    ensure
+      finish if block_given?
+    end
+
+    private
+    def register target, obj
+    end
+  end
+end