message: Remove forward declaration of FaceType to not confuse make style.
diff: #define MFEM_RESTRICTION
  #include "../linalg/operator.hpp"
  +#include "../mesh/mesh.hpp"
  namespace mfem
  {
  @@ -20,7 +21,6 @@ namespace mfem
  class FiniteElementSpace;
  class ParFiniteElementSpace;
  enum class ElementDofOrdering;
  -enum class FaceType : bool;
  /** An enum type to specify if only e1 value is requested (Single) or both
  e1 and e2 (Double). */
  