c++ strings

I'm not sure about how allocation and cleanup works with c++ strings. Does this leak memory?


string get_filename(char * path)
{
    string file_name = path;
    int pos = file_name.find_last_of('\\');
    if (pos!=string::npos)
    {
        file_name = file_name.substr(pos+1); // what happens to the memory here?
    }
    return file_name;
}

In any event, it is unlikely for any of the C++ std classes to leak memory unless it says in the documentation that you are supposed to delete the allocated memory yourself (which is rare, but sometimes happens).