78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
// Copyright (C) 2001-2019 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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// 25.?? algorithms, rotate()
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#include <algorithm>
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#include <testsuite_hooks.h>
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#include <list>
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int A[] = {1, 2, 3, 4, 5, 6, 7};
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int B[] = {2, 3, 4, 5, 6, 7, 1};
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int C[] = {1, 2, 3, 4, 5, 6, 7};
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int D[] = {5, 6, 7, 1, 2, 3, 4};
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const int N = sizeof(A) / sizeof(int);
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/* need a test for a forward iterator -- can't think of one that makes sense */
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/* bidirectional iterator */
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void
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test02()
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{
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using std::rotate;
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typedef std::list<int> Container;
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Container a(A, A + N);
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VERIFY(std::equal(a.begin(), a.end(), A));
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Container::iterator i = a.begin();
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rotate(a.begin(), ++i, a.end());
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VERIFY(std::equal(a.begin(), a.end(), B));
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i = a.end();
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rotate(a.begin(), --i, a.end());
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VERIFY(std::equal(a.begin(), a.end(), C));
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i = a.begin();
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std::advance(i, 3);
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rotate(a.begin(), ++i, a.end());
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VERIFY(std::equal(a.begin(), a.end(), D));
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}
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/* random iterator */
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void
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test03()
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{
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using std::rotate;
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rotate(A, A + 1, A + N);
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VERIFY(std::equal(A, A + N, B));
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rotate(A, A + N - 1, A + N);
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VERIFY(std::equal(A, A + N, C));
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rotate(A, A + 4, A + N);
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VERIFY(std::equal(A, A + N, D));
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}
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int
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main()
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{
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test02();
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test03();
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return 0;
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}
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