revive_hash

# File ext/psych/lib/psych/visitors/to_ruby.rb, line 299
      def revive_hash hash, o
        o.children.each_slice(2) { |k,v|
          key = accept(k)
          val = accept(v)

          if key == '<<'
            case v
            when Nodes::Alias
              begin
                hash.merge! val
              rescue TypeError
                hash[key] = val
              end
            when Nodes::Sequence
              begin
                h = {}
                val.reverse_each do |value|
                  h.merge! value
                end
                hash.merge! h
              rescue TypeError
                hash[key] = val
              end
            else
              hash[key] = val
            end
          else
            hash[key] = val
          end

        }
        hash
      end