78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
// { dg-options "-std=gnu++11" }
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// Copyright (C) 2010-2016 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <list>
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#include <testsuite_hooks.h>
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template <class T>
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struct C
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{
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T t_;
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template <class U,
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class = typename std::enable_if
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<
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!std::is_lvalue_reference<U>::value
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>::type>
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C(U&& u) : t_(std::forward<T>(std::move(u).get())) {}
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};
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class A
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{
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int data_;
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public:
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explicit
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A(int data = 1)
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: data_(data) {}
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~A() { data_ = -1; }
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void test() const
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{
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bool test __attribute__((unused)) = true;
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VERIFY( data_ == 3 );
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}
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};
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class Awrap
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{
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const A& a_;
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public:
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explicit Awrap(const A& a) : a_(a) { }
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const A& get() const { return a_; }
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};
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template <class C>
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void test(C c)
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{
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c.t_.test();
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}
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// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2951.html
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// Test A.
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int main()
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{
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std::list<C<const A&> > list;
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A a(3);
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C<const A&> c((Awrap(a)));
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list.push_back(c);
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test(c);
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test(list.front());
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}
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