From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 31 Oct 2023 19:08:50 +0000 (-0600)
Subject: Make sure we declare the correct classes as 'friend'.
X-Git-Tag: relicensing~333^2~2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72b013c6cb2a8383bcb798e6373b9e40abd5df19;p=dealii.git

Make sure we declare the correct classes as 'friend'.
---

diff --git a/include/deal.II/lac/block_matrix_base.h b/include/deal.II/lac/block_matrix_base.h
index fb4ae24f6d..7b60d94aa3 100644
--- a/include/deal.II/lac/block_matrix_base.h
+++ b/include/deal.II/lac/block_matrix_base.h
@@ -191,10 +191,13 @@ namespace BlockMatrixIterators
     operator==(const Accessor &a) const;
 
     template <typename>
-    friend class MatrixIterator;
+    friend class dealii::MatrixIterator;
+
     friend class Accessor<BlockMatrixType, true>;
   };
 
+
+
   /**
    * Block matrix accessor for constant matrices, implementing the stepping
    * through a matrix.