Function if

src/OpenFOAM/db/IOobjects/CompactIOList/CompactIOList.C:198–216

        return good;
    }
    else if (overflows())
    {
        WarningInFunction
            << "Overall number of elements of CompactIOList of size "
            << this->size() << " overflows the representation of a label"
            << endl << "    Switching to ascii writing" << endl;

        // Change type to be non-compact format type
        const word oldTypeName = typeName;

        const_cast<word&>(typeName) = IOList<T>::typeName;

        bool good = regIOobject::writeObject(IOstream::ASCII, ver, cmp, valid);

        // Change type back
        const_cast<word&>(typeName) = oldTypeName;

        return good;
    }
    else
    {
        return regIOobject::writeObject(fmt, ver, cmp, valid);