From f950fa80ac28dea297796cd66157870945b6c7ed Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Mon, 8 Feb 2021 14:08:13 -0700
Subject: [PATCH] Again work around constexpr issues.

---
 include/deal.II/grid/reference_cell.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/deal.II/grid/reference_cell.h b/include/deal.II/grid/reference_cell.h
index 338310047d..919f633d48 100644
--- a/include/deal.II/grid/reference_cell.h
+++ b/include/deal.II/grid/reference_cell.h
@@ -92,7 +92,8 @@ public:
   /**
    * Default constructor. Initialize this object as an invalid object.
    */
-  constexpr ReferenceCell();
+  DEAL_II_CONSTEXPR
+  ReferenceCell();
 
   /**
    * Return true if the object is a Vertex, Line, Quadrilateral, or Hexahedron.
@@ -379,7 +380,8 @@ namespace ReferenceCells
 
 
 
-inline constexpr ReferenceCell::ReferenceCell()
+inline DEAL_II_CONSTEXPR
+ReferenceCell::ReferenceCell()
   : ReferenceCell(ReferenceCells::Invalid)
 {}
 
-- 
2.39.5