    PageSpec(std::string const& filename,
             char const* password,
             char const* range) :
        filename(filename),
        password(password),
        range(range)
    {
    }
    PageSpec(std::string const& filename,
             char const* password,
             char const* range) :
        filename(filename),
        password(password),
        range(range)
    {
    }