From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 1 Mar 2022 21:29:39 +0000 (-0700)
Subject: Add a TODO.
X-Git-Tag: v9.4.0-rc1~411^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6a3643a5cfcb642d736bccce76c92ced77bfd49d;p=dealii.git

Add a TODO.
---

diff --git a/include/deal.II/base/template_constraints.h b/include/deal.II/base/template_constraints.h
index 6b254638fe..eef14c55f7 100644
--- a/include/deal.II/base/template_constraints.h
+++ b/include/deal.II/base/template_constraints.h
@@ -163,6 +163,10 @@ namespace internal
 {
   namespace TemplateConstraints
   {
+    // TODO: Once we are able to use DEAL_II_HAVE_CXX17, the following classes
+    // can be made much simpler with the help of fold expressions, see
+    // https://en.cppreference.com/w/cpp/language/fold
+
     // helper struct for is_base_of_all and all_same_as
     template <bool... Values>
     struct BoolStorage;