obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

26 files changed, 1325 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/20_util/tuple/48476.cc b/libstdc++-v3/testsuite/20_util/tuple/48476.cc
new file mode 100644
index 000000000..efe0007a6
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/48476.cc
@@ -0,0 +1,51 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2011 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/>.
+
+#include <tuple>
+#include <type_traits>
+#include <memory>
+#include <testsuite_hooks.h>
+
+template<typename T>
+  typename std::decay<T>::type copy(T&& x)
+  { return std::forward<T>(x); }
+
+// libstdc++/48476
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::shared_ptr<int> p(new int()), q, r;
+  
+  std::tuple<std::shared_ptr<int>&, int>  t0(p, 23), t1(q, 0);
+  t1 = copy(t0);  // shall be equivalent to
+                  // q = p; std::get<1>(t1) = std::get<1>(t0);
+  VERIFY( q == p ); 
+
+  std::tuple<std::shared_ptr<int>&, char> t2(r, 0);
+  t2 = copy(t1);  // shall be equivalent to
+                  // r = q; std::get<1>(t2) = std::get<1>(t1);
+  VERIFY( r == q );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/35480_neg.cc b/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/35480_neg.cc
new file mode 100644
index 000000000..613c27f8b
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/35480_neg.cc
@@ -0,0 +1,33 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2008, 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+
+// libstdc++/35480
+void test01()
+{
+  std::tuple<int> t1( 1 );
+  std::tuple<int, int> t2( 1, 2 );
+  if ( t1 < t2 ) {}   // { dg-error "here" }
+  if ( t1 == t2 ) {}  // { dg-error "here" }
+}
+// { dg-excess-errors "incomplete type" }
diff --git a/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/comparisons.cc b/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/comparisons.cc
new file mode 100644
index 000000000..c10fb1cbc
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/comparisons.cc
@@ -0,0 +1,49 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <testsuite_hooks.h>
+
+using namespace std;
+
+bool test __attribute__((unused)) = true;
+
+#define TEST1(x) VERIFY( x == x && !(x != x) && x <= x && !(x < x) )
+
+int
+main()
+{
+  int i=0;
+  int j=0;
+  int k=2;
+  tuple<int, int, int> a(0, 0, 0);
+  tuple<int, int, int> b(0, 0, 1);
+  tuple<int& , int& , int&> c(i,j,k);
+  tuple<const int&, const int&, const int&> d(c);
+  TEST1(a);
+  TEST1(b);
+  TEST1(c);
+  TEST1(d);
+  VERIFY(!(a > a) && !(b > b));
+  VERIFY(a >= a && b >= b);
+  VERIFY(a < b && !(b < a) && a <= b && !(b <= a));
+  VERIFY(b > a && !(a > b) && b >= a && !(a >= b));  
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/41530.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/41530.cc
new file mode 100644
index 000000000..6bd405c09
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/41530.cc
@@ -0,0 +1,34 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+
+class A {};
+class B : public A {};
+
+// PR libstdc++/41530
+void test01()
+{
+  std::tuple<B*> b;
+  std::tuple<A*> a1(b);
+  std::tuple<A*> a2(std::move(b));
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/44487.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/44487.cc
new file mode 100644
index 000000000..dade58de8
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/44487.cc
@@ -0,0 +1,51 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2010 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/>.
+
+#include <tuple>
+
+int x, y;
+
+std::tuple<int&, int&>
+foo1()
+{
+  std::pair<int&, int&> blah(x, y);
+  return blah;
+}
+
+std::tuple<int&, int&>
+foo2()
+{
+  const std::pair<int&, int&> blah(x, y);
+  return blah;
+}
+
+std::tuple<int&, int&>
+foo3()
+{
+  std::pair<int&, int&> blah(x, y);
+  return std::tuple<int&, int&>(std::move(blah));
+}
+
+std::tuple<int&, int&>
+foo4()
+{
+  const std::pair<int&, int&> blah(x, y);
+  return std::tuple<int&, int&>(std::move(blah));
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/45228.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/45228.cc
new file mode 100644
index 000000000..863d78847
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/45228.cc
@@ -0,0 +1,43 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2010 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/>.
+
+#include <tuple>
+
+typedef std::tuple<int>           Tuple_1;
+typedef std::tuple<int, int>      Tuple_2;
+typedef std::tuple<int, int, int> Tuple_3;
+
+      Tuple_1 A_1() { return Tuple_1(); }
+const Tuple_1 B_1() { return Tuple_1(); }
+
+      Tuple_2 A_2() { return Tuple_2(); }
+const Tuple_2 B_2() { return Tuple_2(); }
+
+      Tuple_3 A_3() { return Tuple_3(); }
+const Tuple_3 B_3() { return Tuple_3(); }
+
+Tuple_1 test_A_1(A_1());
+Tuple_1 test_B_1(B_1());
+
+Tuple_2 test_A_2(A_2());
+Tuple_2 test_B_2(B_2());
+
+Tuple_3 test_A_3(A_3());
+Tuple_3 test_B_3(B_3());
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/48476.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/48476.cc
new file mode 100644
index 000000000..b5e3604d2
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/48476.cc
@@ -0,0 +1,27 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2011 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/>.
+
+#include <tuple>
+
+void f()
+{
+  int i = 0;
+  std::tuple<int&, int> t __attribute__((unused)) = std::forward_as_tuple(i, 0);
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/assignment.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/assignment.cc
new file mode 100644
index 000000000..111a398ff
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/assignment.cc
@@ -0,0 +1,52 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <testsuite_hooks.h>
+
+using namespace std;
+
+int
+main()
+{
+  bool test __attribute__((unused)) = true;
+
+  tuple<> ta;
+  tuple<> tb;
+  ta = tb;
+
+  tuple<int> tc(1);
+  tuple<int> td(0);
+  td = tc;
+  VERIFY(get<0>(td) == 1);
+
+  int i=0;
+  tuple<int&> te(i);
+  te = tc;
+  VERIFY(i == 1);
+
+  tuple<const int&> tf(tc);
+
+  get<0>(tc) = 2;
+  VERIFY(get<0>(tf) == 2);
+  tuple<double> tg;
+  tg = tc;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/big_tuples.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/big_tuples.cc
new file mode 100644
index 000000000..7bcb51771
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/big_tuples.cc
@@ -0,0 +1,105 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009, 2010 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <utility> // for pair
+#include <testsuite_hooks.h>
+
+using namespace std;
+
+// A simple class without conversions to check some things
+struct foo
+{ };
+
+void
+test_constructors()
+{
+  bool test __attribute__((unused)) = true;
+
+  int x1=0,x2=0;
+  const int &z1=x1;
+
+  // Test empty constructor
+  tuple<> ta __attribute__((unused));
+  tuple<int,int> tb;
+  // Test construction from values
+  tuple<int,int> tc(x1,x2);
+  tuple<int,int&> td(x1,x2);
+  tuple<const int&> te(z1);
+  x1=1;
+  x2=1;
+  VERIFY(get<0>(td) == 0 && get<1>(td) == 1 && get<0>(te) == 1);
+
+  // Test identical tuple copy constructor
+  tuple<int,int> tf(tc);
+  tuple<int,int> tg(td);
+  tuple<const int&> th(te);
+  // Test different tuple copy constructor
+  tuple<int,double> ti(tc);
+  tuple<int,double> tj(td);
+  // Test constructing from a pair
+  pair<int,int> pair1(1,1);
+  const pair<int,int> pair2(pair1);
+  tuple<int,int> tl(pair1);
+  tuple<int,const int&> tm(pair1);
+  tuple<int,int> tn(pair2);
+  tuple<int,const int&> to(pair2);  
+}
+
+int 
+main(void) 
+{
+  //test construction
+  typedef tuple<int,int,int,int,int,int,int,int,int,int> type1;
+  type1 a(0, 0, 0, 0, 0, 0, 0, 0, 0, 1);
+  type1 b(0, 0, 0, 0, 0, 0, 0, 0, 0, 2);
+  type1 c(a);
+  typedef tuple<int,int,int,int,int,int,int,int,int,char> type2;
+  type2 d(0, 0, 0, 0, 0, 0, 0, 0, 0, 3);
+  type1 e(d);
+  typedef tuple<foo,int,int,int,int,int,int,int,int,foo> type3;
+  // get
+  VERIFY(get<9>(a)==1 && get<9>(b)==2);
+  // comparisons
+  VERIFY(a==a && !(a!=a) && a<=a && a>=a && !(a<a) && !(a>a));
+  VERIFY(!(a==b) && a!=b && a<=b && a<b && !(a>=b) && !(a>b));
+  //tie
+  {
+    int i = 0;
+  tie(ignore, ignore, ignore, ignore, ignore, ignore, ignore, ignore, 
+      ignore, i) = a;
+  VERIFY(i == 1);
+  }
+  //test_assignment
+  a=d;
+  a=b;
+  //make_tuple
+  make_tuple(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+  
+  //tuple_size
+  VERIFY(tuple_size<type3>::value == 10);
+  //tuple_element
+  {  
+    foo q1;
+    tuple_element<0,type3>::type q2(q1);
+    tuple_element<9,type3>::type q3(q1);
+  }
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/constexpr.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/constexpr.cc
new file mode 100644
index 000000000..b5eba73fd
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/constexpr.cc
@@ -0,0 +1,47 @@
+// { dg-do compile }
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2010 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/>.
+
+#include <memory>
+#include <testsuite_common_types.h>
+
+int main()
+{
+  __gnu_test::constexpr_default_constructible test1;
+  test1.operator()<std::tuple<int, int>>();
+
+  __gnu_test::constexpr_single_value_constructible test2;
+  test2.operator()<std::tuple<int, int>, std::tuple<int, int>>();
+  //  test2.operator()<std::tuple<int, int>, std::pair<short, short>>();
+  //  test2.operator()<std::tuple<int>, std::tuple<short>>();
+  //  test2.operator()<std::tuple<int, int>, std::tuple<short, short>>();
+
+  // test 3
+  const int i1(129);
+  const int i2(6);
+  constexpr std::tuple<int, int> p3(i1, i2);
+
+  // test 4
+  const int i3(415);
+  const int i4(550);
+  const int i5(6414);
+  constexpr std::tuple<int, int, int, int, int> p4(i1, i2, i3, i4, i5);
+
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/constructor.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/constructor.cc
new file mode 100644
index 000000000..9871f4959
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/constructor.cc
@@ -0,0 +1,65 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2008, 2009, 2010 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <utility> // for pair
+#include <testsuite_hooks.h>
+
+using namespace std;
+
+int
+main()
+{
+  bool test __attribute__((unused)) = true;
+
+  int x1=0,x2=0;
+  const int &z1=x1;
+
+  // Test empty constructor
+  tuple<> ta __attribute__((unused));
+  tuple<int,int> tb;
+  // Test construction from values
+  tuple<int,int> tc(x1,x2);
+  tuple<int,int&> td(x1,x2);
+  tuple<const int&> te(z1);
+  x1=1;
+  x2=1;
+  VERIFY(get<0>(td) == 0 && get<1>(td) == 1 && get<0>(te) == 1);
+
+  // Test identical tuple copy constructor
+  tuple<int,int> tf(tc);
+  tuple<int,int> tg(td);
+  tuple<const int&> th(te);
+  // Test different tuple copy constructor
+  tuple<int,double> ti(tc);
+  tuple<int,double> tj(td);
+  //tuple<int&, int&> tk(tc);
+  tuple<const int&, const int&> tl(tc);
+  tuple<const int&, const int&> tm(tl);
+  // Test constructing from a pair
+  pair<int,int> pair1(1,1);
+  const pair<int,int> pair2(pair1);
+  tuple<int,int> tn(pair1);
+  tuple<int,const int&> to(pair1);
+  tuple<int,int> tp(pair2);
+  tuple<int,const int&> tq(pair2);  
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/converting.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/converting.cc
new file mode 100644
index 000000000..def1b521d
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/converting.cc
@@ -0,0 +1,37 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2010 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/>.
+
+#include <tuple>
+
+// http://gcc.gnu.org/ml/libstdc++/2008-02/msg00047.html
+std::tuple<int> ts1;
+std::tuple<unsigned> tu1(ts1);
+
+std::tuple<int, int> ts2;
+std::tuple<unsigned, unsigned> tu2(ts2);
+
+std::tuple<int, int, int> ts3;
+std::tuple<unsigned, unsigned, unsigned> tu3(ts3);
+
+std::tuple<int, unsigned> tm2;
+std::tuple<unsigned, int> tm2_(tm2);
+
+std::tuple<int, unsigned, int> tm3;
+std::tuple<unsigned, int, unsigned> tm3_(tm3);
diff --git a/libstdc++-v3/testsuite/20_util/tuple/creation_functions/23978.cc b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/23978.cc
new file mode 100644
index 000000000..7db57bc70
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/23978.cc
@@ -0,0 +1,45 @@
+// { dg-options "-std=gnu++0x" }
+//
+// Copyright (C) 2007, 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <utility>
+#include <testsuite_hooks.h>
+
+using namespace std;
+
+// libstdc++/23978
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  pair<int, int> p(1, 2);
+  int x = 0;
+  int y = 0;
+  tie(x, y) = p;
+  VERIFY( x == 1 && y == 2 );
+}
+
+int
+main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/creation_functions/48476.cc b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/48476.cc
new file mode 100644
index 000000000..1607e4552
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/48476.cc
@@ -0,0 +1,85 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2011 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/>.
+
+#include <tuple>
+#include <type_traits>
+#include <testsuite_hooks.h>
+
+template<typename T>
+  typename std::decay<T>::type copy(T&& x)
+  { return std::forward<T>(x); }
+
+template<typename... Args1, typename... Args2>
+  void
+  check_tuple_cat(std::tuple<Args1...> t1, std::tuple<Args2...> t2)
+  {
+    bool test __attribute__((unused)) = true;
+
+    typedef std::tuple<Args1..., Args2...> concatenated;
+  
+    auto cat1 = std::tuple_cat(     t1,       t2 );
+    auto cat2 = std::tuple_cat(copy(t1),      t2 );
+    auto cat3 = std::tuple_cat(     t1,  copy(t2));
+    auto cat4 = std::tuple_cat(copy(t1), copy(t2));
+  
+    static_assert( std::is_same<decltype(cat1), concatenated>::value, "" );
+    static_assert( std::is_same<decltype(cat2), concatenated>::value, "" );
+    static_assert( std::is_same<decltype(cat3), concatenated>::value, "" );
+    static_assert( std::is_same<decltype(cat4), concatenated>::value, "" );
+  
+    VERIFY( cat1 == cat2 );
+    VERIFY( cat1 == cat3 );
+    VERIFY( cat1 == cat4 );
+  }
+
+// libstdc++/48476
+void test01()
+{
+  int i = 0;
+  std::tuple<> t0;
+  std::tuple<int&> t1(i);
+  std::tuple<int&, int> t2(i, 0);
+  std::tuple<int const&, int, double> t3(i, 0, 0);
+  
+  check_tuple_cat(t0, t0);
+  check_tuple_cat(t0, t1);
+  check_tuple_cat(t0, t2);
+  check_tuple_cat(t0, t3);
+  
+  check_tuple_cat(t1, t0);
+  check_tuple_cat(t1, t1);
+  check_tuple_cat(t1, t2);
+  check_tuple_cat(t1, t3);
+  
+  check_tuple_cat(t2, t0);
+  check_tuple_cat(t2, t1);
+  check_tuple_cat(t2, t2);
+  check_tuple_cat(t2, t3);
+  
+  check_tuple_cat(t3, t0);
+  check_tuple_cat(t3, t1);
+  check_tuple_cat(t3, t2);
+  check_tuple_cat(t3, t3);
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/creation_functions/forward_as_tuple.cc b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/forward_as_tuple.cc
new file mode 100644
index 000000000..bad4ad49c
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/forward_as_tuple.cc
@@ -0,0 +1,72 @@
+// { dg-options "-std=gnu++0x" }
+
+// 2010-04-30  Paolo Carlini  <paolo.carlini@oracle.com>
+//
+// Copyright (C) 2010 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <type_traits>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::forward_as_tuple();
+
+  VERIFY( std::get<0>(std::forward_as_tuple(-1)) == -1 );
+  VERIFY( (std::is_same<decltype(std::forward_as_tuple(-1)),
+	   std::tuple<int&&>>::value) );
+
+  const int i1 = 1;
+  const int i2 = 2;
+  const double d1 = 4.0;
+  auto t1 = std::forward_as_tuple(i1, i2, d1);
+  VERIFY( (std::is_same<decltype(t1), std::tuple<const int&,
+	   const int&, const double&>>::value) );
+  VERIFY( std::get<0>(t1) == i1 );
+  VERIFY( std::get<1>(t1) == i2 );
+  VERIFY( std::get<2>(t1) == d1 );
+
+  typedef const int a_type1[3];
+  a_type1 a1 = { -1, 1, 2 };
+  auto t2 = std::forward_as_tuple(a1);
+  VERIFY( (std::is_same<decltype(t2), std::tuple<a_type1&>>::value) );
+  VERIFY( std::get<0>(t2)[0] == a1[0] );
+  VERIFY( std::get<0>(t2)[1] == a1[1] );
+  VERIFY( std::get<0>(t2)[2] == a1[2] );
+
+  typedef int a_type2[2];
+  a_type2 a2 = { 2, -2 };
+  volatile int i4 = 1;
+  auto t3 = std::forward_as_tuple(a2, i4);
+  VERIFY( (std::is_same<decltype(t3), std::tuple<a_type2&,
+	   volatile int&>>::value) );
+  VERIFY( std::get<0>(t3)[0] == a2[0] );
+  VERIFY( std::get<0>(t3)[1] == a2[1] );
+  VERIFY( std::get<1>(t3) == i4 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/creation_functions/make_tuple.cc b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/make_tuple.cc
new file mode 100644
index 000000000..7521111fa
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/make_tuple.cc
@@ -0,0 +1,37 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <functional>
+#include <testsuite_hooks.h>
+
+using namespace std;
+
+int
+main()
+{
+  bool test __attribute__((unused)) = true;
+
+  int i=0;
+  make_tuple(1,2,4.0);
+  make_tuple(ref(i)) = tuple<int>(1);
+  VERIFY(i == 1);
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/creation_functions/tie.cc b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/tie.cc
new file mode 100644
index 000000000..a76928979
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/tie.cc
@@ -0,0 +1,42 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <testsuite_hooks.h>
+
+using namespace std;
+
+int
+main()
+{
+  bool test __attribute__((unused)) = true; 
+
+  int x1 = 0;
+  int x2 = 0;
+  int y1 = 0;
+  int y2 = 0;
+  tuple<int,int> ta(1,1);
+  tuple<const int&,const int&> tc(x1,x2);
+  tie(y1,y2)=ta;
+  VERIFY(y1 == 1 && y2 == 1);
+  tie(y1,y2)=tc;
+  VERIFY(y1 == 0 && y2 == 0);
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/creation_functions/tie2.cc b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/tie2.cc
new file mode 100644
index 000000000..538c3e8e1
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/creation_functions/tie2.cc
@@ -0,0 +1,38 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <string>
+#include <testsuite_hooks.h>
+
+int
+main()
+{
+  bool test __attribute__((unused)) = true; 
+  using namespace std;
+
+  int i;
+  string s;
+
+  tie(i, ignore, s) = make_tuple(42, 3.14, "C++");
+  VERIFY( i == 42 );
+  VERIFY( s == "C++" );
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/element_access/get.cc b/libstdc++-v3/testsuite/20_util/tuple/element_access/get.cc
new file mode 100644
index 000000000..1ec01cfca
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/element_access/get.cc
@@ -0,0 +1,44 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <testsuite_hooks.h>
+
+using namespace std;
+
+int
+main()
+{
+  bool test __attribute__((unused)) = true;
+
+  int j=1;
+  const int k=2;
+  tuple<int,int &,const int&> a(0,j,k);
+  const tuple<int,int &,const int&> b(1,j,k); 
+  VERIFY(get<0>(a)==0 && get<1>(a)==1 && get<2>(a)==2);
+  get<0>(a)=3;
+  get<1>(a)=4;  
+  VERIFY(get<0>(a)==3 && get<1>(a)==4);
+  VERIFY(j==4);
+  get<1>(b)=5;
+  VERIFY(get<0>(b)==1 && get<1>(b)==5 && get<2>(b)==2);
+  VERIFY(j==5);
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/moveable.cc b/libstdc++-v3/testsuite/20_util/tuple/moveable.cc
new file mode 100644
index 000000000..0fedd83ed
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/moveable.cc
@@ -0,0 +1,42 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009 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/>.
+
+
+// NOTE: This makes use of the fact that we know how moveable
+// is implemented on tuple.  If the implementation changed
+// this test may begin to fail.
+
+#include <tuple>
+#include <utility>
+#include <testsuite_hooks.h>
+
+int main()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::tuple<int, double> a(1, 2.0), b;
+  b = std::move(a);
+  VERIFY( std::get<0>(b) == 1 && std::get<1>(b) == 2.0 );
+  VERIFY( std::get<0>(a) == 1 && std::get<1>(a) == 2.0 );
+
+  std::tuple<int, double> c(std::move(b));
+  VERIFY( std::get<0>(c) == 1 && std::get<1>(c) == 2.0 );
+  VERIFY( std::get<0>(b) == 1 && std::get<1>(b) == 2.0 );
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/moveable2.cc b/libstdc++-v3/testsuite/20_util/tuple/moveable2.cc
new file mode 100644
index 000000000..f08007421
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/moveable2.cc
@@ -0,0 +1,64 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2008, 2009 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/>.
+
+
+#include <tuple>
+#include <utility>
+
+struct MoveOnly
+{
+  MoveOnly () { }
+  
+  MoveOnly (MoveOnly&&) { }
+
+  MoveOnly& operator=(MoveOnly&&)
+  { return *this; }
+
+private:
+  MoveOnly(MoveOnly const&); // = delete
+  MoveOnly& operator=(MoveOnly const&); // = delete
+};
+
+MoveOnly
+make_move_only ()
+{ return MoveOnly(); }
+
+// http://gcc.gnu.org/ml/libstdc++/2008-02/msg00046.html
+void test01()
+{
+  typedef std::tuple<MoveOnly> move_only_tuple;
+
+  move_only_tuple t1(make_move_only());
+  move_only_tuple t2(std::move(t1));
+  move_only_tuple t3 = std::move(t2);
+  t1 = std::move(t3);
+
+  typedef std::tuple<MoveOnly, MoveOnly> move_only_tuple2;
+
+  move_only_tuple2 t4(make_move_only(), make_move_only());
+  move_only_tuple2 t5(std::move(t4));
+  move_only_tuple2 t6 = std::move(t5);
+  t4 = std::move(t6);
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/requirements/dr801.cc b/libstdc++-v3/testsuite/20_util/tuple/requirements/dr801.cc
new file mode 100644
index 000000000..fd21b9ee5
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/requirements/dr801.cc
@@ -0,0 +1,52 @@
+// { dg-do compile }
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2010 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/>.
+
+#include <tuple>
+#include <type_traits>
+
+// DR 801, pair and tuple vs. "passed in registers"
+void test_trivial()
+{
+  // PODType, TType, NType, SLType, LType, NLType, LTypeDerived
+  typedef std::tuple<int, int> tuple_type;
+  // static_assert(std::is_literal_type<tuple_type>::value, "! literal");
+  static_assert(std::has_trivial_copy_constructor<tuple_type>::value,
+		"! triv copy");
+  static_assert(std::has_trivial_destructor<tuple_type>::value,
+		"! triv destructor");
+  // static_assert(std::is_standard_layout<tuple_type>::value,
+  //		   "! standard layout");
+
+  // Negative
+  /*
+  static_assert(std::has_trivial_default_constructor<tuple_type>::value,
+		"! triv default");
+  static_assert(std::has_trivial_copy_assign<tuple_type>::value,
+		"! triv assign");
+  static_assert(std::is_trivial<tuple_type>::value, "! triv");
+  static_assert(std::is_pod<tuple_type>::value, "! pod");
+  */
+}
+
+int main()
+{
+  test_trivial();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/requirements/explicit_instantiation.cc b/libstdc++-v3/testsuite/20_util/tuple/requirements/explicit_instantiation.cc
new file mode 100644
index 000000000..22b8f50f5
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/requirements/explicit_instantiation.cc
@@ -0,0 +1,24 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2007, 2009 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/>.
+
+
+#include <tuple>
+
+template class std::tuple<short, int, double>;
diff --git a/libstdc++-v3/testsuite/20_util/tuple/swap.cc b/libstdc++-v3/testsuite/20_util/tuple/swap.cc
new file mode 100644
index 000000000..613e9c2ff
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/swap.cc
@@ -0,0 +1,111 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009 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/>.
+
+
+// NOTE: This makes use of the fact that we know how moveable
+// is implemented on tuple.  If the implementation changed
+// this test may begin to fail.
+
+#include <tuple>
+#include <utility>
+#include <testsuite_hooks.h>
+
+struct MoveOnly
+{
+  explicit MoveOnly (int j) : i(j) { }
+
+  MoveOnly (MoveOnly&& m) : i(m.i) { }
+
+  MoveOnly& operator=(MoveOnly&& m)
+  { i = m.i; return *this; }
+
+  MoveOnly(MoveOnly const&) = delete;
+  MoveOnly& operator=(MoveOnly const&) = delete;
+
+  bool operator==(MoveOnly const& m)
+  { return i == m.i; }
+
+  void swap(MoveOnly& m)
+  { std::swap(m.i, i); }
+
+  int i;
+};
+
+void swap(MoveOnly& m1, MoveOnly& m2)
+{ m1.swap(m2); }
+
+MoveOnly
+make_move_only (int i)
+{ return MoveOnly(i); }
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::tuple<> t1, t2;
+  std::swap(t1, t2);
+
+  VERIFY( t1 == t2 );
+}
+
+void test02()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::tuple<int> t1(1), t2(2);
+  std::swap(t1, t2);
+  
+  VERIFY( std::get<0>(t1) == 2 && std::get<0>(t2) == 1 );
+}
+
+void test03()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::tuple<int, float> t1(1, 1.0f), t2(2, 2.0f);
+  std::swap(t1, t2);
+
+  VERIFY( std::get<0>(t1) == 2 && std::get<0>(t2) == 1 );
+  VERIFY( std::get<1>(t1) == 2.0f && std::get<1>(t2) == 1.0f );
+}
+
+void test04()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::tuple<int, float, MoveOnly> 
+    t1(1, 1.0f, make_move_only(1)), 
+    t2(2, 2.0f, make_move_only(2));
+
+  std::swap(t1, t2);
+
+  VERIFY( std::get<0>(t1) == 2 && std::get<0>(t2) == 1 );
+  VERIFY( std::get<1>(t1) == 2.0f && std::get<1>(t2) == 1.0f );
+  VERIFY( std::get<2>(t1) == make_move_only(2) 
+	  && std::get<2>(t2) == make_move_only(1) );
+}
+
+int main()
+{
+  test01();
+  test02();
+  test03();
+  test04();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/tuple_element.cc b/libstdc++-v3/testsuite/20_util/tuple/tuple_element.cc
new file mode 100644
index 000000000..9344ea082
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/tuple_element.cc
@@ -0,0 +1,37 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+
+using namespace std;
+
+struct foo
+{ };
+
+int
+main()
+{
+  // As foo isn't constructible from anything else, this
+  // lets us check if type is returning foo when it should
+  foo q1;
+  tuple_element<0,tuple<foo,void,int> >::type q2(q1);
+  tuple_element<2,tuple<void,int,foo> >::type q3(q1);
+}
diff --git a/libstdc++-v3/testsuite/20_util/tuple/tuple_size.cc b/libstdc++-v3/testsuite/20_util/tuple/tuple_size.cc
new file mode 100644
index 000000000..51f4a2db8
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/tuple/tuple_size.cc
@@ -0,0 +1,38 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2007, 2009 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/>.
+
+// Tuple
+
+#include <tuple>
+#include <testsuite_hooks.h>
+
+using namespace std;
+
+int
+main()
+{
+  bool test __attribute__((unused)) = true;
+
+  VERIFY(tuple_size<tuple<> >::value == 0);
+  VERIFY(tuple_size<tuple<int> >::value == 1);
+  VERIFY(tuple_size<tuple<void> >::value == 1);
+  typedef tuple<int,const int&,void> test_tuple1;
+  VERIFY(tuple_size<test_tuple1>::value == 3);
+  VERIFY(tuple_size<tuple<tuple<void> > >::value == 1);
+}