# File lib/sass/selector/comma_sequence.rb, line 26 def resolve_parent_refs(super_cseq, implicit_parent = true) if super_cseq.nil? if contains_parent_ref? raise Sass::SyntaxError.new( "Base-level rules cannot contain the parent-selector-referencing character '&'.") end return self end CommaSequence.new(Sass::Util.flatten_vertically(@members.map do |seq| seq.resolve_parent_refs(super_cseq, implicit_parent).members end)) end