1 files changed, 52 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/24_iterators/reverse_iterator/cust.cc b/libstdc++-v3/testsuite/24_iterators/reverse_iterator/cust.cc
new file mode 100644
index 00000000000..ac86312fbe7
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+++ b/libstdc++-v3/testsuite/24_iterators/reverse_iterator/cust.cc
@@ -0,0 +1,52 @@
+// Copyright (C) 2019-2020 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 <iterator>
+#include <testsuite_hooks.h>
+
+// This test is an adaptation of 24_iterators/move_iterator/cust.cc.
+
+constexpr bool
+test01()
+{
+  struct X
+  {
+    constexpr X(int i) noexcept : i(i) { }
+    constexpr X(X&& x) noexcept : i(x.i) { x.i = -1; }
+    constexpr X& operator=(X&& x) noexcept { i = x.i; x.i = 0; return *this; }
+    int i;
+  };
+
+  X arr[] = { 1, 2 };
+  std::reverse_iterator<X*> i(arr + 1), j(arr + 2);
+  static_assert(noexcept(std::ranges::iter_swap(i, j)));
+  std::ranges::iter_swap(i, j);
+  VERIFY( arr[0].i == 2 );
+  VERIFY( arr[1].i == 1 );
+
+  static_assert(noexcept(std::ranges::iter_move(i)));
+  X x = std::ranges::iter_move(i);
+  VERIFY( arr[0].i == -1 );
+  VERIFY( x.i == 2 );
+
+  return true;
+}
+
+static_assert(test01());