modify paramater without reference
<p>I'm using an external library, and I have a class inheriting from another class with the next function</p>

<p><b>void IOCallback::Open(const char* filename, bool isOpen)</b></p>

<p>I need to modify the bool and I can't modify the code to use it like reference.</p>

<p>it's there anyway I can achieve this?</p>

<p>thanks</p>
