Fix the last remaining constexpr std::max in patterns.h

diff --git a/include/deal.II/base/patterns.h b/include/deal.II/base/patterns.h
index 69c8441b14a7b13bcf706d5a98c50a10593c3dbb..38a6a25d2ae5f4097748abcafb8151dc8999093b 100644 (file)
--- a/include/deal.II/base/patterns.h
+++ b/include/deal.II/base/patterns.h
@@ -1303,8 +1303,8 @@ namespace Patterns
       template <class Key, class Value>
       struct RankInfo<std::pair<Key,Value>>
       {
-        static constexpr int list_rank = std::max(RankInfo<Key>::list_rank, RankInfo<Value>::list_rank);
-        static constexpr int map_rank = std::max(RankInfo<Key>::map_rank, RankInfo<Value>::map_rank)+1;
+        static constexpr int list_rank = std_cxx14::max(RankInfo<Key>::list_rank, RankInfo<Value>::list_rank);
+        static constexpr int map_rank = std_cxx14::max(RankInfo<Key>::map_rank, RankInfo<Value>::map_rank)+1;
       };
     }