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62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
// Copyright (C) 2013-2018 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 "-DSIMULATOR_TEST" { target simulator } }
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// { dg-do run { target c++11 } }
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// { dg-require-cstdint "" }
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// 25.4.2 [lib.alg.nth.element]
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#include <algorithm>
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#include <random>
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#include <testsuite_hooks.h>
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#include <testsuite_iterators.h>
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#include <testsuite_containergen.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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typedef test_container<int, random_access_iterator_wrapper> Container;
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struct testNthElement
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{
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template<typename Container, typename RandomGen>
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void operator()(Container con, RandomGen& rg)
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{
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const int size = con.end() - con.begin();
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auto dist = std::uniform_int_distribution<>(0, size);
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const int element = dist(rg);
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std::nth_element(con.begin(), con.begin() + element, con.end());
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if (element < size)
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{
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for (int i = 0; i < element; ++i)
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VERIFY( con.val(i) <= con.val(element) );
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for (int i = element + 1; i < size; ++i)
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VERIFY( con.val(i) >= con.val(element) );
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}
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}
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};
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int
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main()
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{
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__gnu_test::test_containers<Container>(testNthElement());
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}
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