predicate_to_string (REXML::Parsers::XPathParser)

    # File src/rexml/parsers/xpathparser.rb, line 66
                            def predicate_to_string( path )
                                    string = ""
                                    case path[0]
                                    when :and, :or, :mult, :plus, :minus, :neq, :eq, :lt, :gt, :lteq, :gteq, :div, :mod, :neq, :union
                                            op = path.shift
                                            left = predicate_to_string( path.shift )
                                            right = predicate_to_string( path.shift )
                                            string << " "
                                            string << left
                                            string << " "
                                            string << op.to_s
                                            string << " "
                                            string << right
                                            string << " "
                                    when :function
                                            path.shift
                                            name = path.shift
                                            string << name
                                            string << "( "
                                            string << predicate_to_string( path.shift )
                                            string << " )"
                                    when :literal
                                            path.shift
                                            string << " "
                                            string << path.shift.inspect
                                            string << " "
                                    else
                                            string << " "
                                            string << to_string( path )
                                            string << " "
                                    end
                                    return string.squeeze(" ")
                            end