* 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, 56 insertions, 0 deletions

diff --git a/ext/psych/lib/psych/nodes/mapping.rb b/ext/psych/lib/psych/nodes/mapping.rb
new file mode 100644
index 0000000000..5ba95ce4b6
--- /dev/null
+++ b/ext/psych/lib/psych/nodes/mapping.rb
@@ -0,0 +1,56 @@
+module Psych
+  module Nodes
+    ###
+    # This class represents a {YAML Mapping}[http://yaml.org/spec/1.1/#mapping].
+    #
+    # A Psych::Nodes::Mapping node may have 0 or more children, but must have
+    # an even number of children.  Here are the valid children a
+    # Psych::Nodes::Mapping node may have:
+    #
+    # * Psych::Nodes::Sequence
+    # * Psych::Nodes::Mapping
+    # * Psych::Nodes::Scalar
+    # * Psych::Nodes::Alias
+    class Mapping < Psych::Nodes::Node
+      # Any Map Style
+      ANY   = 0
+
+      # Block Map Style
+      BLOCK = 1
+
+      # Flow Map Style
+      FLOW  = 2
+
+      # The optional anchor for this mapping
+      attr_accessor :anchor
+
+      # The optional tag for this mapping
+      attr_accessor :tag
+
+      # Is this an implicit mapping?
+      attr_accessor :implicit
+
+      # The style of this mapping
+      attr_accessor :style
+
+      ###
+      # Create a new Psych::Nodes::Mapping object.
+      #
+      # +anchor+ is the anchor associated with the map or +nil+.
+      # +tag+ is the tag associated with the map or +nil+.
+      # +implicit+ is a boolean indicating whether or not the map was implicitly
+      # started.
+      # +style+ is an integer indicating the mapping style.
+      #
+      # == See Also
+      # See also Psych::Handler#start_mapping
+      def initialize anchor = nil, tag = nil, implicit = true, style = BLOCK
+        super()
+        @anchor   = anchor
+        @tag      = tag
+        @implicit = implicit
+        @style    = style
+      end
+    end
+  end
+end