From: David Wells <drwells@email.unc.edu>
Date: Thu, 21 Dec 2023 14:46:17 +0000 (-0500)
Subject: Fix an unused variable warning.
X-Git-Tag: relicensing~232^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=22e59435e5a9ec2e2a509cc46452480ae8e94d1e;p=dealii.git

Fix an unused variable warning.

AFAICT this was fixed in GCC at some point.
---

diff --git a/source/grid/tria_accessor.cc b/source/grid/tria_accessor.cc
index 4c084ea65f..b9a9c0cfd5 100644
--- a/source/grid/tria_accessor.cc
+++ b/source/grid/tria_accessor.cc
@@ -2245,6 +2245,10 @@ void
 CellAccessor<dim, spacedim>::set_direction_flag(
   const bool new_direction_flag) const
 {
+  // Some older compilers (GCC 9) print an unused variable warning about
+  // new_direction_flag when it is only used in a subset of 'if constexpr'
+  // statements
+  (void)new_direction_flag;
   Assert(this->used(), TriaAccessorExceptions::ExcCellNotUsed());
   if constexpr (dim == spacedim)
     Assert(new_direction_flag == true,