From 77b4e6cc759bf45198c37f791969af438e5e9a4d Mon Sep 17 00:00:00 2001
From: Daniel Arndt <arndtd@ornl.gov>
Date: Tue, 26 May 2020 08:45:37 -0400
Subject: [PATCH] Add another comparison operator

---
 include/deal.II/base/table.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/deal.II/base/table.h b/include/deal.II/base/table.h
index 7b4c0fd364..2162e88d90 100644
--- a/include/deal.II/base/table.h
+++ b/include/deal.II/base/table.h
@@ -907,6 +907,19 @@ namespace MatrixTableIterators
     AccessorBase(const container_pointer_type table,
                  const std::ptrdiff_t         linear_index);
 
+    /**
+     * Comparison operator.
+     */
+    template <bool OtherConstness>
+    friend bool
+    operator==(
+      const AccessorBase<TableType, Constness, storage_order> &     left,
+      const AccessorBase<TableType, OtherConstness, storage_order> &right)
+    {
+      return left.container == right.container &&
+             left.linear_index == right.linear_index;
+    }
+
     /**
      * Get a constant reference to the value of the element represented by
      * this accessor.
-- 
2.39.5