# File lib/chef_zero/solr/query/binary_operator.rb, line 19
        def matches_doc?(doc)
          case @operator
          when 'AND'
            left.matches_doc?(doc) && right.matches_doc?(doc)
          when 'OR'
            left.matches_doc?(doc) || right.matches_doc?(doc)
          when '^'
            left.matches_doc?(doc)
          when ':'
            if left.respond_to?(:literal_string) && left.literal_string
              values = doc[left.literal_string]
            else
              values = doc.matching_values { |key| left.matches_values?([key]) }
            end
            right.matches_values?(values)
          end
        end