From 754719717ace91da647735f5e9376b760da3948d Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 15 Nov 2022 07:47:03 -0700
Subject: [PATCH] Work around a strange compiler issue.
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

The MPI build bot complains that using a {...} initializer list would require the use
of a conversion constructor marked as 'explicit':

data_out_base.cc:1156:29: error: converting to ‘std::tuple<unsigned int, unsigned int>’ from initializer list would use explicit constructor ‘constexpr std::tuple<_T1, _T2>::tuple(_U1&&, _U2&&) [with _U1 = unsigned int&; _U2 = unsigned int&; <template-parameter-2-3> = void; _T1 = unsigned int; _T2 = unsigned int]’

That makes no sense, but let's appease the compiler by being explicit.
---
 source/base/data_out_base.cc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/source/base/data_out_base.cc b/source/base/data_out_base.cc
index d97b43fe70..a52000ebaa 100644
--- a/source/base/data_out_base.cc
+++ b/source/base/data_out_base.cc
@@ -1153,7 +1153,7 @@ namespace
           }
       }
 
-    return {n_nodes, n_cells};
+    return std::tuple<unsigned int, unsigned int>(n_nodes, n_cells);
   }
 
 
@@ -1209,7 +1209,8 @@ namespace
           }
       }
 
-    return {n_nodes, n_cells, n_points_and_n_cells};
+    return std::tuple<unsigned int, unsigned int, unsigned int>(
+      n_nodes, n_cells, n_points_and_n_cells);
   }
 
   /**
-- 
2.39.5