def selector_append(*selectors)
if selectors.empty?
raise ArgumentError.new("$selectors: At least one selector must be passed")
end
selectors.map {|sel| parse_selector(sel, :selectors)}.inject do |parent, child|
child.members.each do |seq|
sseq = seq.members.first
unless sseq.is_a?(Sass::Selector::SimpleSequence)
raise ArgumentError.new("Can't append \"#{seq}\" to \"#{parent}\"")
end
base = sseq.base
case base
when Sass::Selector::Universal
raise ArgumentError.new("Can't append \"#{seq}\" to \"#{parent}\"")
when Sass::Selector::Element
unless base.namespace.nil?
raise ArgumentError.new("Can't append \"#{seq}\" to \"#{parent}\"")
end
sseq.members[0] = Sass::Selector::Parent.new(base.name)
else
sseq.members.unshift Sass::Selector::Parent.new
end
end
child.resolve_parent_refs(parent)
end.to_sass_script
end