82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
// Copyright (C) 2005, 2009 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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// 25.3.2 [lib.alg.nth.element]
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#include <algorithm>
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#include <testsuite_hooks.h>
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#include <testsuite_iterators.h>
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using __gnu_test::test_container;
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using __gnu_test::random_access_iterator_wrapper;
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using std::nth_element;
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using std::partial_sort;
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typedef test_container<int, random_access_iterator_wrapper> Container;
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void
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test1()
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{
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int array[]={0};
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Container con(array, array);
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partial_sort(con.begin(), con.begin(), con.end());
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}
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void
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test2()
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{
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int array[]={2,1,0};
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Container con(array, array + 2);
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partial_sort(con.begin(), con.begin(), con.end());
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partial_sort(con.begin(), con.end(), con.end());
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}
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void
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test3()
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{
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bool test __attribute__((unused)) = true;
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int array[] = {6, 5, 4, 3, 2, 1, 0};
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Container con(array, array + 7);
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nth_element(con.begin(), con.it(3), con.end());
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for(int i = 0; i < 3; ++i)
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VERIFY(array[i] < array[3]);
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for(int i = 4; i < 7; ++i)
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VERIFY(array[3] < array[i]);
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}
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void
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test4()
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{
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bool test __attribute__((unused)) = true;
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int array[] = {0, 6, 1, 5, 2, 4, 3};
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Container con(array,array + 7);
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nth_element(con.begin(), con.it(3), con.end());
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for(int i = 0; i < 3; ++i)
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VERIFY(array[i] < array[3]);
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for(int i = 4; i < 7; ++i)
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VERIFY(array[3] < array[i]);
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}
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int
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main()
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{
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test1();
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test2();
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test3();
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test4();
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}
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