From 6faec131cb140948003fff0a89064f737e3b1b4d Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Fri, 9 Apr 2010 08:36:24 -0700
Subject: merging from ruby to psych

---
 lib/psych.rb            | 11 ++++++++---
 lib/psych/coder.rb      | 11 ++++++++++-
 lib/psych/core_ext.rb   |  5 ++++-
 lib/psych/nodes/node.rb | 10 ++++++----
 4 files changed, 28 insertions(+), 9 deletions(-)

(limited to 'lib')

diff --git a/lib/psych.rb b/lib/psych.rb
index c142593..9b4b215 100644
--- a/lib/psych.rb
+++ b/lib/psych.rb
@@ -1,4 +1,4 @@
-require 'psych/psych'
+require 'psych.so'
 require 'psych/nodes'
 require 'psych/visitors'
 require 'psych/handler'
@@ -153,10 +153,15 @@ module Psych
   # Example:
   #
   #   Psych.dump(['a', 'b'])  # => "---\n- a\n- b\n"
-  def self.dump o, options = {}
+  def self.dump o, io = nil, options = {}
+    if Hash === io
+      options = io
+      io      = nil
+    end
+
     visitor = Psych::Visitors::YAMLTree.new options
     visitor << o
-    visitor.tree.to_yaml
+    visitor.tree.to_yaml io
   end
 
   ###
diff --git a/lib/psych/coder.rb b/lib/psych/coder.rb
index 79e46da..eff0cc3 100644
--- a/lib/psych/coder.rb
+++ b/lib/psych/coder.rb
@@ -7,7 +7,7 @@ module Psych
   # called, respectively.
   class Coder
     attr_accessor :tag, :style, :implicit
-    attr_reader   :type, :map, :scalar, :seq
+    attr_reader   :type, :scalar, :seq
 
     def initialize tag
       @map        = {}
@@ -19,6 +19,14 @@ module Psych
       @scalar     = nil
     end
 
+    # Emit a map.  The coder will be yielded to the block.
+    def map tag = @tag, style = @style
+      @tag   = tag
+      @style = style
+      yield self if block_given?
+      @map
+    end
+
     # Emit a scalar with +value+ and +tag+
     def represent_scalar tag, value
       self.tag    = tag
@@ -53,6 +61,7 @@ module Psych
       @type = :map
       @map[k] = v
     end
+    alias :add :[]=
 
     def [] k
       @type = :map
diff --git a/lib/psych/core_ext.rb b/lib/psych/core_ext.rb
index bd22219..9c55c70 100644
--- a/lib/psych/core_ext.rb
+++ b/lib/psych/core_ext.rb
@@ -12,11 +12,14 @@ class Object
   def psych_to_yaml options = {}
     Psych.dump self, options
   end
+  remove_method :to_yaml rescue nil
   alias :to_yaml :psych_to_yaml
 end
 
 module Kernel
-  def y *objects
+  def psych_y *objects
     puts Psych.dump_stream(*objects)
   end
+  remove_method :y rescue nil
+  alias y psych_y
 end
diff --git a/lib/psych/nodes/node.rb b/lib/psych/nodes/node.rb
index 0de768c..3ab9aca 100644
--- a/lib/psych/nodes/node.rb
+++ b/lib/psych/nodes/node.rb
@@ -30,10 +30,12 @@ module Psych
       # Convert this node to YAML.
       #
       # See also Psych::Visitors::Emitter
-      def to_yaml
-        io = StringIO.new
-        Visitors::Emitter.new(io).accept self
-        io.string
+      def to_yaml io = nil
+        real_io = io || StringIO.new
+
+        Visitors::Emitter.new(real_io).accept self
+        return real_io.string unless io
+        io
       end
     end
   end
-- 
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