1 files changed, 90 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/ext/random/simd_fast_mersenne_twister_engine/cons/seed_seq2.cc b/libstdc++-v3/testsuite/ext/random/simd_fast_mersenne_twister_engine/cons/seed_seq2.cc
new file mode 100644
index 000000000000..325e27517b19
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/random/simd_fast_mersenne_twister_engine/cons/seed_seq2.cc
@@ -0,0 +1,90 @@
+// Copyright (C) 2018 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 run { target c++11 } }
+// { dg-require-cstdint "" }
+// { dg-require-little-endian "" }
+
+#include <ext/random>
+#include <testsuite_hooks.h>
+
+template<typename T>
+struct seed_seq
+{
+  using result_type = unsigned;
+
+  seed_seq() { }
+
+  template<class U>
+    seed_seq(std::initializer_list<U>) { }
+
+  template<class InputIterator>
+    seed_seq(InputIterator, InputIterator) { }
+
+  template<class RandomAccessIterator>
+    void generate(RandomAccessIterator first, RandomAccessIterator last)
+    {
+      called = true;
+      if (first != last)
+	*first = 42;
+    }
+
+  size_t size() const { called = true; return 1; }
+
+  template<class OutputIterator>
+    void param(OutputIterator dest) const { called = true; dest = 42; }
+
+  // Prevents this type being considered as a seed sequence when
+  // T is convertible to the engine's result_type:
+  operator T() const noexcept { return T(); }
+
+  bool called = false;
+};
+
+using engine_type
+  = __gnu_cxx::simd_fast_mersenne_twister_engine<
+    uint32_t, 607, 2,
+    15, 3, 13, 3,
+    0xfdff37ffU, 0xef7f3f7dU,
+    0xff777b7dU, 0x7ff7fb2fU,
+    0x00000001U, 0x00000000U,
+    0x00000000U, 0x5986f054U>;
+
+void
+test01()
+{
+  seed_seq<unsigned> seed;
+  engine_type x(seed);
+  VERIFY( ! seed.called );
+}
+
+void
+test02()
+{
+  seed_seq<void*> seed;
+  engine_type x(seed);
+  VERIFY( seed.called );
+
+  static_assert(!std::is_constructible<engine_type, const seed_seq<void>&>(),
+      "Cannot construct from a const seed_seq");
+}
+
+int main()
+{
+  test01();
+  test02();
+}