1 files changed, 81 insertions, 0 deletions
diff --git a/ext/psych/lib/psych/nodes/sequence.rb b/ext/psych/lib/psych/nodes/sequence.rb
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+++ b/ext/psych/lib/psych/nodes/sequence.rb
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+module Psych
+  module Nodes
+    ###
+    # This class represents a
+    # {YAML sequence}[http://yaml.org/spec/1.1/#sequence/syntax].
+    #
+    # A YAML sequence is basically a list, and looks like this:
+    #
+    #   %YAML 1.1
+    #   ---
+    #   - I am
+    #   - a Sequence
+    #
+    # A YAML sequence may have an anchor like this:
+    #
+    #   %YAML 1.1
+    #   ---
+    #   &A [
+    #     "This sequence",
+    #     "has an anchor"
+    #   ]
+    #
+    # A YAML sequence may also have a tag like this:
+    #
+    #   %YAML 1.1
+    #   ---
+    #   !!seq [
+    #     "This sequence",
+    #     "has a tag"
+    #   ]
+    #
+    # This class represents a sequence in a YAML document.  A
+    # Psych::Nodes::Sequence node may have 0 or more children.  Valid children
+    # for this node are:
+    #
+    # * Psych::Nodes::Sequence
+    # * Psych::Nodes::Mapping
+    # * Psych::Nodes::Scalar
+    # * Psych::Nodes::Alias
+    class Sequence < Psych::Nodes::Node
+      # Any Styles, emitter chooses
+      ANY   = 0
+
+      # Block style sequence
+      BLOCK = 1
+
+      # Flow style sequence
+      FLOW  = 2
+
+      # The anchor for this sequence (if any)
+      attr_accessor :anchor
+
+      # The tag name for this sequence (if any)
+      attr_accessor :tag
+
+      # Is this sequence started implicitly?
+      attr_accessor :implicit
+
+      # The sequece style used
+      attr_accessor :style
+
+      ###
+      # Create a new object representing a YAML sequence.
+      #
+      # +anchor+ is the anchor associated with the sequence or nil.
+      # +tag+ is the tag associated with the sequence or nil.
+      # +implicit+ a boolean indicating whether or not the sequence was
+      # implicitly started.
+      # +style+ is an integer indicating the list style.
+      #
+      # See Psych::Handler#start_sequence
+      def initialize anchor = nil, tag = nil, implicit = true, style = BLOCK
+        super()
+        @anchor   = anchor
+        @tag      = tag
+        @implicit = implicit
+        @style    = style
+      end
+    end
+  end
+end