From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Thu, 23 May 2024 17:30:11 +0000 (-0600)
Subject: Add a missing header file.
X-Git-Tag: v9.6.0-rc1~230^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b81fdf8bce7bce0d2d009170b37a8c265ece678;p=dealii.git

Add a missing header file.

We use concepts in this file, but don't include the necessary header file. This only
shows up if you compile in C++20 mode.
---

diff --git a/include/deal.II/numerics/time_dependent.h b/include/deal.II/numerics/time_dependent.h
index d4d6897f38..01f023e868 100644
--- a/include/deal.II/numerics/time_dependent.h
+++ b/include/deal.II/numerics/time_dependent.h
@@ -21,6 +21,7 @@
 #include <deal.II/base/exceptions.h>
 #include <deal.II/base/smartpointer.h>
 #include <deal.II/base/subscriptor.h>
+#include <deal.II/base/template_constraints.h>
 
 #include <utility>
 #include <vector>