protected function pushEnv($block = null)
    {
        $e = new stdclass();
        $e->parent = $this->env;
        $e->store = array();
        $e->block = $block;

        $this->env = $e;

        return $e;
    }
protected function pushEnv($block = null)
    {
        $e = new stdclass();
        $e->parent = $this->env;
        $e->store = array();
        $e->block = $block;

        $this->env = $e;

        return $e;
    }
protected function pushEnv ( $ block = null ) { $ e = new stdclass ( ) ; $ e -> parent = $ this -> env ; $ e -> store = array ( ) ; $ e -> block = $ block ; $ this -> env = $ e ; return $ e ; }
the state of execution
the state of execution