From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Wed, 5 Jul 2023 00:13:26 +0000 (-0600)
Subject: Change argument to reference to avoid unnecessary copies.
X-Git-Tag: relicensing~742^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F15633%2Fhead;p=dealii.git

Change argument to reference to avoid unnecessary copies.
---

diff --git a/include/deal.II/lac/la_parallel_block_vector.h b/include/deal.II/lac/la_parallel_block_vector.h
index 693a9fe5eb..3a69583770 100644
--- a/include/deal.II/lac/la_parallel_block_vector.h
+++ b/include/deal.II/lac/la_parallel_block_vector.h
@@ -551,9 +551,9 @@ namespace LinearAlgebra
       void
       import_elements(
         const LinearAlgebra::ReadWriteVector<Number> &V,
-        VectorOperation::values                       operation,
-        std::shared_ptr<const Utilities::MPI::CommunicationPatternBase>
-          communication_pattern = {});
+        const VectorOperation::values                 operation,
+        const std::shared_ptr<const Utilities::MPI::CommunicationPatternBase>
+          &communication_pattern = {});
 
       /**
        * @deprecated Use import_elements() instead.
diff --git a/include/deal.II/lac/la_parallel_block_vector.templates.h b/include/deal.II/lac/la_parallel_block_vector.templates.h
index d4155126b5..8312e1a8ca 100644
--- a/include/deal.II/lac/la_parallel_block_vector.templates.h
+++ b/include/deal.II/lac/la_parallel_block_vector.templates.h
@@ -859,8 +859,8 @@ namespace LinearAlgebra
     inline void
     BlockVector<Number>::import_elements(
       const LinearAlgebra::ReadWriteVector<Number> &,
-      VectorOperation::values,
-      std::shared_ptr<const Utilities::MPI::CommunicationPatternBase>)
+      const VectorOperation::values,
+      const std::shared_ptr<const Utilities::MPI::CommunicationPatternBase> &)
     {
       AssertThrow(false, ExcNotImplemented());
     }