diff libstdc++-v3/testsuite/24_iterators/customization_points/92894.cc @ 19:2b5abeee2509 default tip

update gcc11
author anatofuz
date Mon, 25 May 2020 07:50:57 +0900
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libstdc++-v3/testsuite/24_iterators/customization_points/92894.cc	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,52 @@
+// 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 <iterator>
+
+using namespace std;
+
+// Define our own of version of indirectly_readable_impl here,
+// to check the use of iter_move even if the real concept in
+// <bits/iterator_concepts.h> no longer uses iter_move.
+template<class In>
+concept indirectly_readable_impl
+  = requires(const In in)
+      {
+	typename iter_value_t<In>;
+	typename iter_reference_t<In>;
+	typename iter_rvalue_reference_t<In>;
+	{ *in } -> same_as<iter_reference_t<In>>;
+	{ ranges::iter_move(in) } -> same_as<iter_rvalue_reference_t<In>>;
+      };
+
+template<class T> requires indirectly_readable_impl<projected<T*, identity>>
+  void algo(T)
+  { }
+
+void
+test01()
+{
+  // PR libstdc++/92894
+  // Verify that the use of range::iter_move above doesn't cause odr-use of
+  // projected<local-class-type, identity>::operator* (which is not defined).
+  struct X { };
+  X a;
+  algo(a);
+}