107 lines
2.8 KiB
C++
107 lines
2.8 KiB
C++
// { dg-options "-std=gnu++0x" }
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// Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
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// 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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#undef _GLIBCXX_CONCEPT_CHECKS
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// XXX FIXME: parallel-mode should deal correctly with moveable-only types
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// per C++0x, at minimum smoothly fall back to serial.
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#undef _GLIBCXX_PARALLEL
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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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#include <testsuite_rvalref.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 __gnu_test::rvalstruct;
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typedef test_container<rvalstruct, random_access_iterator_wrapper> Container;
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void
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test1()
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{
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bool test __attribute__((unused)) = true;
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int intarray[] = {6, 5, 4, 3, 2, 1, 0};
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rvalstruct array[7];
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std::copy(intarray, intarray + 7, array);
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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].val < 3 );
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for(int i = 4; i < 7; ++i)
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VERIFY( array[i].val > 3 );
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for(int i = 0; i < 7; ++i)
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VERIFY( array[i].valid );
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}
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void
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test2()
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{
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bool test __attribute__((unused)) = true;
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int intarray[] = {0, 6, 1, 5, 2, 4, 3};
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rvalstruct array[7];
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std::copy(intarray, intarray + 7, array);
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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].val < 3 );
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for(int i = 4; i < 7; ++i)
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VERIFY( array[i].val > 3 );
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for(int i = 0; i < 7; ++i)
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VERIFY( array[i].valid );
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}
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bool
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are_less(const rvalstruct& lhs, const rvalstruct& rhs)
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{ return lhs < rhs; }
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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 intarray[] = {0, 6, 1, 5, 2, 4, 3};
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rvalstruct array[7];
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std::copy(intarray, intarray + 7, array);
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Container con(array,array + 7);
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nth_element(con.begin(), con.it(3), con.end(), are_less);
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for(int i = 0; i < 3; ++i)
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VERIFY( array[i].val < 3 );
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for(int i = 4; i < 7; ++i)
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VERIFY( array[i].val > 3 );
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for(int i = 0; i < 7; ++i)
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VERIFY( array[i].valid );
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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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return 0;
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}
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