From: Daniel Arndt <arndtd@ornl.gov>
Date: Mon, 3 Jul 2023 15:55:36 +0000 (-0400)
Subject: Fix missing include file for optimization/line_minimization.h
X-Git-Tag: relicensing~784^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=43e0ca70867b9981eec3db2d38cbd4f5737b9569;p=dealii.git

Fix missing include file for optimization/line_minimization.h
---

diff --git a/include/deal.II/optimization/line_minimization.h b/include/deal.II/optimization/line_minimization.h
index 2f95f6362d..bb0418b0a0 100644
--- a/include/deal.II/optimization/line_minimization.h
+++ b/include/deal.II/optimization/line_minimization.h
@@ -29,6 +29,7 @@
 #include <fstream>
 #include <functional>
 #include <limits>
+#include <optional>
 #include <string>