class RSpec::Support::Source::Node

A wrapper for Ripper AST node which is generated with ‘Ripper.sexp`.
@private

def self.sexp?(array) 

def self.sexp?(array)
  array.is_a?(Array) && array.first.is_a?(Symbol)
end

def args 

def args
  @args ||= raw_args.map do |raw_arg|
    if Node.sexp?(raw_arg)
      Node.new(raw_arg, self)
    elsif Location.location?(raw_arg)
      Location.new(*raw_arg)
    elsif raw_arg.is_a?(Array)
      ExpressionSequenceNode.new(raw_arg, self)
    else
      raw_arg
    end
  end.freeze
end

def children 

def children
  @children ||= args.select { |arg| arg.is_a?(Node) }.freeze
end

def each

We use a loop here (instead of recursion) to prevent SystemStackError 
def each
  return to_enum(__method__) unless block_given?
  node_queue = []
  node_queue << self
  while (current_node = node_queue.shift)
    yield current_node
    node_queue.concat(current_node.children)
  end
end

def each_ancestor 

def each_ancestor
  return to_enum(__method__) unless block_given?
  current_node = self
  while (current_node = current_node.parent)
    yield current_node
  end
end

def initialize(ripper_sexp, parent=nil) 

def initialize(ripper_sexp, parent=nil)
  @sexp = ripper_sexp.freeze
  @parent = parent
end

def inspect 

def inspect
  "#<#{self.class} #{type}>"
end

def location 

def location
  @location ||= args.find { |arg| arg.is_a?(Location) }
end

def raw_args 

def raw_args
  sexp[1..-1] || []
end

def type 

def type
  sexp[0]
end