50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
// { dg-do run { target c++11 } }
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// Copyright (C) 2011-2020 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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// 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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// 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 <tuple>
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#include <type_traits>
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#include <memory>
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#include <testsuite_hooks.h>
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template<typename T>
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typename std::decay<T>::type copy(T&& x)
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{ return std::forward<T>(x); }
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// libstdc++/48476
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void test01()
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{
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std::shared_ptr<int> p(new int()), q, r;
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std::tuple<std::shared_ptr<int>&, int> t0(p, 23), t1(q, 0);
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t1 = copy(t0); // shall be equivalent to
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// q = p; std::get<1>(t1) = std::get<1>(t0);
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VERIFY( q == p );
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std::tuple<std::shared_ptr<int>&, char> t2(r, 0);
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t2 = copy(t1); // shall be equivalent to
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// r = q; std::get<1>(t2) = std::get<1>(t1);
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VERIFY( r == q );
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}
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int main()
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{
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test01();
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return 0;
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}
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