mageekguy\atoum\php\tokenizer\iterator::prev PHP Метод

    public function prev($offset = 1)
    {
        while (($valid = $this->valid()) === true && $offset > 0) {
            $currentValue = current($this->values);
            $currentValue->prev();
            while ($currentValue->valid() === false && $valid === true) {
                prev($this->values);
                if (($valid = $this->valid()) === true) {
                    $currentValue = current($this->values);
                    $currentValue->end();
                }
            }
            if ($valid === true) {
                while (in_array($this->current(), $this->skipedValues) === true && $this->valid() === true) {
                    $this->prev();
                }
            }
            $this->key--;
            $offset--;
        }
        return $this;
    }