Hi all,

I notice that the overloaded member function of MatrixFree::reinit 
<https://www.dealii.org/current/doxygen/deal.II/classMatrixFree.html#adf70156869fbd945c40fb5d2cb0b921e>
 says 
MatrixFree support multi-component finite elements together with multiple 
quadrature formulas.

However the quadratures are input by *std::vector<QuadratureType>*. Since 
std::vector does not have polymorphism, does this mean *only the same type 
of quadrature with different quadrature degrees are supported*? ( for 
example std::vector{QGauss<1>(2), QGauss<1>(3)}, but not 
std::vector{QGauss<1>(2),  QGaussLobatto<1>(3)} )

I have checked the tutorials and test cases and didn't find any example of 
using this reinit function.

Regards
Chengjiang Yin

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