From 0a8067b16e14535174010ebdf138850215151a47 Mon Sep 17 00:00:00 2001
From: Marcel Koch <marcel.koch@kit.edu>
Date: Fri, 9 Aug 2024 15:31:26 +0200
Subject: [PATCH] [mpi] define moved-from state for communicator

---
 include/ginkgo/core/base/mpi.hpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/include/ginkgo/core/base/mpi.hpp b/include/ginkgo/core/base/mpi.hpp
index 636296465a2..862f145ae16 100644
--- a/include/ginkgo/core/base/mpi.hpp
+++ b/include/ginkgo/core/base/mpi.hpp
@@ -462,6 +462,22 @@ class communicator {
         return comm_out;
     }
 
+    communicator(const communicator& other) = default;
+
+    communicator(communicator&& other) { *this = std::move(other); }
+
+    communicator& operator=(const communicator& other) = default;
+
+    communicator& operator=(communicator&& other)
+    {
+        if (this != &other) {
+            comm_ = std::exchange(other.comm_,
+                                  std::make_shared<MPI_Comm>(MPI_COMM_NULL));
+            force_host_buffer_ = other.force_host_buffer_;
+        }
+        return *this;
+    }
+
     /**
      * Return the underlying MPI_Comm object.
      *