--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libstdc++-v3/testsuite/26_numerics/transform_inclusive_scan/constexpr.cc	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,44 @@
+// Copyright (C) 2020 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-options "-std=gnu++2a" }
+// { dg-do compile { target c++2a } }
+
+#include <functional>
+#include <numeric>
+
+constexpr bool
+test01()
+{
+  int x[3] = {1,2,3};
+  int y[3];
+  std::transform_inclusive_scan(x, x+3, y, std::plus{}, std::negate{}, 0);
+  return y[0] == -1 && y[1] == -3 && y[2] == -6;
+}
+
+static_assert(test01());
+
+constexpr bool
+test02()
+{
+  int x[3] = {1,2,3};
+  int y[3];
+  std::transform_inclusive_scan(x, x+3, y, std::plus{}, std::negate{});
+  return y[0] == -1 && y[1] == -3 && y[2] == -6;
+}
+
+static_assert(test02());