parser_class example

    protected function doCompile($_content)
    {
        /* here is where the compiling takes place. Smarty tags in the templates are replaces with PHP code, then written to compiled files. */
        // init the lexer/parser to compile the template         $this->lex = new $this->lexer_class($_content, $this);
        $this->parser = new $this->parser_class($this->lex, $this);
        if ($this->smarty->_parserdebug)
            $this->parser->PrintTrace();
        // get tokens from lexer and parse them         while ($this->lex->yylex() && !$this->abort_and_recompile) {
            if ($this->smarty->_parserdebug) {
                echo "<pre>Line {$this->lex->line} Parsing {$this->parser->yyTokenName[$this->lex->token]} Token " .
                    htmlentities($this->lex->value) . "</pre>";
            }
            $this->parser->doParse($this->lex->token, $this->lex->value);
        }