Apply C++20 changes to various iterator types

[thirdparty/gcc.git] / libstdc++-v3 / testsuite / 24_iterators / output / tag.cc

diff --git a/libstdc++-v3/testsuite/24_iterators/output/tag.cc b/libstdc++-v3/testsuite/24_iterators/output/tag.cc
new file mode 100644 (file)
index 0000000..515088e
--- /dev/null
+++ b/libstdc++-v3/testsuite/24_iterators/output/tag.cc
@@ -0,0 +1,32 @@
+// Copyright (C) 2019 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-do compile { target c++11 } }
+
+#include <iterator>
+
+using std::output_iterator_tag;
+using std::input_iterator_tag;
+using std::iterator_traits;
+
+static_assert( std::is_empty<output_iterator_tag>::value );
+static_assert( std::is_trivially_copy_constructible<output_iterator_tag>::value );
+
+static_assert( ! std::is_base_of<input_iterator_tag,
+                                output_iterator_tag>::value );
+static_assert( ! std::is_convertible<output_iterator_tag*,
+                                    input_iterator_tag*>::value );