emplace: can it return derived class pointer?

Can we return the derived pointer so that the following code can be written in one line?

    // wolf: emplace
    auto c = FactorBase::emplace<FactorDiffDrive>(f1, f1, C0, processor);
    FactorDiffDrivePtr cd = std::static_pointer_cast<FactorDiffDrive>(c);

    // would be written as
    FactorDiffDrivePtr cd = FactorBase::emplace<FactorDiffDrive>(f1, f1, C0, processor);

    // this would also work out of the box:
    FactorBasePtr cb = FactorBase::emplace<FactorDiffDrive>(f1, f1, C0, processor);