[patch] libstdc++/65631 make std::seed_seq noncopyable

[Jonathan Wakely]

Tested ppc64le-linux, committed to trunk.


commit 8009da43b7be1a10335240b7b2f4e27250d5376f
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Mon Mar 30 19:22:52 2015 +0100

    	PR libstdc++/65631
    	* include/bits/random.h (seed_seq) Define copy constructor and copy
    	assignment as deleted.
    	* testsuite/26_numerics/random/seed_seq/cons/65631.cc: New.

diff --git a/libstdc++-v3/include/bits/random.h b/libstdc++-v3/include/bits/random.h
index 8caade5..501243d 100644
--- a/libstdc++-v3/include/bits/random.h
+++ b/libstdc++-v3/include/bits/random.h
@@ -6053,6 +6053,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       param(OutputIterator __dest) const
       { std::copy(_M_v.begin(), _M_v.end(), __dest); }
 
+    // no copy functions
+    seed_seq(const seed_seq&) = delete;
+    seed_seq& operator=(const seed_seq&) = delete;
+
   private:
     ///
     std::vector<result_type> _M_v;
diff --git a/libstdc++-v3/testsuite/26_numerics/random/seed_seq/cons/65631.cc b/libstdc++-v3/testsuite/26_numerics/random/seed_seq/cons/65631.cc
new file mode 100644
index 0000000..cdc4e57
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/random/seed_seq/cons/65631.cc
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 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++11" }
+// { dg-do compile }
+
+#include <random>
+#include <type_traits>
+
+static_assert( !std::is_copy_constructible<std::seed_seq>::value,
+    "seed_seq is not copy constructible" );
+
+static_assert( !std::is_copy_assignable<std::seed_seq>::value,
+    "seed_seq is not copy assignable" );