From: Daniel Arndt <daniel.arndt@iwr.uni-heidelberg.de>
Date: Sun, 29 Apr 2018 10:16:12 +0000 (+0200)
Subject: Fix warning for non-const comparator
X-Git-Tag: v9.0.0-rc1~71^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9e7209b18c8f11a4b6bc1da6e24a2e476507eef;p=dealii.git

Fix warning for non-const comparator
---

diff --git a/include/deal.II/matrix_free/face_setup_internal.h b/include/deal.II/matrix_free/face_setup_internal.h
index 368364ca4a..8a1c71c4e4 100644
--- a/include/deal.II/matrix_free/face_setup_internal.h
+++ b/include/deal.II/matrix_free/face_setup_internal.h
@@ -854,7 +854,7 @@ namespace internal
     struct FaceComparator
     {
       bool operator() (const FaceToCellTopology<length> &face1,
-                       const FaceToCellTopology<length> &face2)
+                       const FaceToCellTopology<length> &face2) const
       {
         for (unsigned int i=0; i<length; ++i)
           if (face1.cells_interior[i] < face2.cells_interior[i])