# File lib/sass/selector/simple_sequence.rb, line 88
      def resolve_parent_refs(super_cseq)
        resolved_members = @members.map do |sel|
          next sel unless sel.is_a?(Pseudo) && sel.selector
          sel.with_selector(sel.selector.resolve_parent_refs(super_cseq, false))
        end.flatten

        # Parent selector only appears as the first selector in the sequence
        unless (parent = resolved_members.first).is_a?(Parent)
          return CommaSequence.new([Sequence.new([SimpleSequence.new(resolved_members, subject?)])])
        end

        return super_cseq if @members.size == 1 && parent.suffix.nil?

        CommaSequence.new(super_cseq.members.map do |super_seq|
          members = super_seq.members.dup
          newline = members.pop if members.last == "\n"
          unless members.last.is_a?(SimpleSequence)
            raise Sass::SyntaxError.new("Invalid parent selector for \"#{self}\": \"" +
              super_seq.to_s + '"')
          end

          parent_sub = members.last.members
          unless parent.suffix.nil?
            parent_sub = parent_sub.dup
            parent_sub[-1] = parent_sub.last.dup
            case parent_sub.last
            when Sass::Selector::Class, Sass::Selector::Id, Sass::Selector::Placeholder
              parent_sub[-1] = parent_sub.last.class.new(parent_sub.last.name + parent.suffix)
            when Sass::Selector::Element
              parent_sub[-1] = parent_sub.last.class.new(
                parent_sub.last.name + parent.suffix,
                parent_sub.last.namespace)
            when Sass::Selector::Pseudo
              if parent_sub.last.arg || parent_sub.last.selector
                raise Sass::SyntaxError.new("Invalid parent selector for \"#{self}\": \"" +
                  super_seq.to_s + '"')
              end
              parent_sub[-1] = Sass::Selector::Pseudo.new(
                parent_sub.last.type,
                parent_sub.last.name + parent.suffix,
                nil, nil)
            else
              raise Sass::SyntaxError.new("Invalid parent selector for \"#{self}\": \"" +
                super_seq.to_s + '"')
            end
          end

          Sequence.new(members[0...-1] +
            [SimpleSequence.new(parent_sub + resolved_members[1..-1], subject?)] +
            [newline].compact)
          end)
      end