Use static_assert to ensure correct type

diff --git a/source/matrix_free/dof_info.cc b/source/matrix_free/dof_info.cc
index 74bb04d153071ea0821bb709902d5980aa83a312..ac7e721ff1572cee2121d52c9e211fcc21ca8a33 100644 (file)
--- a/source/matrix_free/dof_info.cc
+++ b/source/matrix_free/dof_info.cc
@@ -28,6 +28,13 @@ namespace internal
 {
   namespace MatrixFreeFunctions
   {
+    // ensure that the type defined in both dof_info.h and
+    // hanging_nodes_internal.h is consistent
+    static_assert(std::is_same<compressed_constraint_kind, std::uint8_t>::value,
+                  "Unexpected type for compressed hanging node indicators!");
+
+
+
     DoFInfo::DoFInfo()
     {
       clear();