yy_get_expected_tokens example

        $line = $this->lex->line;
        if (isset($args)) {
            // $line--;         }
        $match = preg_split("/\n/", $this->lex->data);
        $error_text = "Syntax error in config file '{$this->config->source->filepath}' on line {$line} '{$match[$line-1]}' ";
        if (isset($args)) {
            // individual error message             $error_text .= $args;
        } else {
            // exspected token from parser             foreach ($this->parser->yy_get_expected_tokens($this->parser->yymajor) as $token) {
                $exp_token = $this->parser->yyTokenName[$token];
                if (isset($this->lex->smarty_token_names[$exp_token])) {
                    // token type from lexer                     $expect[] = '"' . $this->lex->smarty_token_names[$exp_token] . '"';
                } else {
                    // otherwise internal token name                     $expect[] = $this->parser->yyTokenName[$token];
                }
            }
            // output parser error message             $error_text .= ' - Unexpected "' . $this->lex->value . '", expected one of: ' . implode(' , ', $expect);
        }

        if (!isset($line)) {
            $line = $this->lex->line;
        }
        $match = preg_split("/\n/", $this->lex->data);
        $error_text = 'Syntax Error in template "' . $this->template->source->filepath . '" on line ' . $line . ' "' . htmlspecialchars(trim(preg_replace('![\t\r\n]+!', ' ', $match[$line - 1]))) . '" ';
        if (isset($args)) {
            // individual error message             $error_text .= $args;
        } else {
            // expected token from parser             $error_text .= ' - Unexpected "' . $this->lex->value . '"';
            if (count($this->parser->yy_get_expected_tokens($this->parser->yymajor)) <= 4) {
                foreach ($this->parser->yy_get_expected_tokens($this->parser->yymajor) as $token) {
                    $exp_token = $this->parser->yyTokenName[$token];
                    if (isset($this->lex->smarty_token_names[$exp_token])) {
                        // token type from lexer                         $expect[] = '"' . $this->lex->smarty_token_names[$exp_token] . '"';
                    } else {
                        // otherwise internal token name                         $expect[] = $this->parser->yyTokenName[$token];
                    }
                }
                $error_text .= ', expected one of: ' . implode(' , ', $expect);
            }