From c86f10e395173948f85fc2b2d63d14a8152d8513 Mon Sep 17 00:00:00 2001
From: Simon Praetorius <simon.praetorius@tu-dresden.de>
Date: Sun, 6 Sep 2020 15:35:11 +0200
Subject: [PATCH] remove unused variable warning

---
 dune/vtk/gridcreators/continuousgridcreator.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dune/vtk/gridcreators/continuousgridcreator.hh b/dune/vtk/gridcreators/continuousgridcreator.hh
index 6e77e60..b259132 100644
--- a/dune/vtk/gridcreators/continuousgridcreator.hh
+++ b/dune/vtk/gridcreators/continuousgridcreator.hh
@@ -47,7 +47,7 @@ namespace Dune
         for (std::size_t i = 0; i < types.size(); ++i) {
           auto type = Vtk::to_geometry(types[i]);
           Vtk::CellType cellType{type};
-          auto refElem = referenceElement<double,Grid::dimension>(type);
+          [[maybe_unused]] auto refElem = referenceElement<double,Grid::dimension>(type);
 
           int nNodes = offsets[i] - (i == 0 ? 0 : offsets[i-1]);
           assert(nNodes == refElem.size(Grid::dimension));
-- 
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