Exact evaluation of boundary conditions at the quadrature points

[nabil atallah]

I recently started coding in Fenics and I was wondering if there is a way to evaluate the source and boundary condition functions exactly at the points of integration rather than interpolating from the nodes. I checked some of the Dolfin threads, but it is not clear if a solution has been found. I thought that quadrature elements might be the solution, but I read that is just an optimization strategy whereby the values are interpolated and stored at the quadrature points. 

Thank you.