Rebase.
[official-gcc.git] / libstdc++-v3 / testsuite / 20_util / forward / b.cc
blob17d9f13f49cdb8a0dd3206dcf175dfb779bb2682
1 // { dg-options "-std=gnu++0x" }
3 // Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING3. If not see
18 // <http://www.gnu.org/licenses/>.
20 #include <list>
21 #include <testsuite_hooks.h>
23 template <class T>
24 struct C
26 T t_;
28 template <class U,
29 class = typename std::enable_if
31 !std::is_lvalue_reference<U>::value
32 >::type>
33 C(U&& u) : t_(std::forward<T>(std::move(u).get())) {}
36 class A
38 int data_;
39 public:
40 explicit
41 A(int data = 1)
42 : data_(data) { }
44 ~A() { data_ = -1; }
46 void test() const
48 bool test __attribute__((unused)) = true;
49 VERIFY( data_ == 3 );
53 class Awrap
55 A a_;
56 public:
57 explicit Awrap(const A& a) : a_(a) { }
58 A get() const { return a_; }
61 template <class C>
62 void test(C c)
64 c.t_.test();
67 // http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html
68 // Test B.
69 int main()
71 std::list<C<A> > list;
72 A a(3);
73 C<A> c((Awrap(a)));
74 list.push_back(c);
75 test(c);
76 test(list.front());