94 lines
2.1 KiB
C++
94 lines
2.1 KiB
C++
// Copyright (C) 2018-2019 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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// { dg-options "-std=gnu++2a" }
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// { dg-do run { target c++2a } }
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#include <numeric>
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#include <iterator>
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#include <testsuite_hooks.h>
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struct Int
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{
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Int(int v) : val(v) { }
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~Int() = default;
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Int(const Int& x) : val(x.val), copies(x.copies), moved_from(x.moved_from)
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{ ++copies; }
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Int(Int&& x) : val(x.val), copies(x.copies), moved_from(x.moved_from)
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{ x.moved_from = true; }
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Int& operator=(const Int& x)
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{
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val = x.val;
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copies = x.copies + 1;
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moved_from = x.moved_from;
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return *this;
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}
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Int& operator=(Int&& x)
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{
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val = x.val;
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copies = x.copies;
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moved_from = x.moved_from;
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x.moved_from = true;
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return *this;
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}
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int val = 0;
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int copies = 0;
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bool moved_from = false;
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};
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Int operator+(Int x, Int y) { x.val += y.val; return x; }
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struct Add
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{
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Int operator()(Int x, Int y) const { x.val += y.val; return x; }
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};
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void
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test01()
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{
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Int i[] = { 0, 1, 2, 3, 4 };
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Int res = std::accumulate(std::begin(i), std::end(i), Int{0});
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VERIFY( res.copies == 0 );
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VERIFY( !res.moved_from );
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for (const auto& r : i)
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VERIFY( !r.moved_from );
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}
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void
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test02()
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{
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Int i[] = { 0, 1, 2, 3, 4 };
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Int res = std::accumulate(std::begin(i), std::end(i), Int{0}, Add{});
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VERIFY( res.copies == 0 );
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VERIFY( !res.moved_from );
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for (const auto& r : i)
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VERIFY( !r.moved_from );
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}
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int
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main()
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{
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test01();
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test02();
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}
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