| // { dg-options "-std=gnu++0x" } |
| |
| // Copyright (C) 2005-2013 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // 25.3.2 [lib.alg.nth.element] |
| |
| #undef _GLIBCXX_CONCEPT_CHECKS |
| |
| // XXX FIXME: parallel-mode should deal correctly with moveable-only types |
| // per C++0x, at minimum smoothly fall back to serial. |
| #undef _GLIBCXX_PARALLEL |
| |
| #include <algorithm> |
| #include <testsuite_hooks.h> |
| #include <testsuite_iterators.h> |
| #include <testsuite_rvalref.h> |
| |
| using __gnu_test::test_container; |
| using __gnu_test::random_access_iterator_wrapper; |
| using std::nth_element; |
| using __gnu_test::rvalstruct; |
| |
| typedef test_container<rvalstruct, random_access_iterator_wrapper> Container; |
| |
| void |
| test1() |
| { |
| bool test __attribute__((unused)) = true; |
| |
| int intarray[] = {6, 5, 4, 3, 2, 1, 0}; |
| rvalstruct array[7]; |
| std::copy(intarray, intarray + 7, array); |
| Container con(array, array + 7); |
| nth_element(con.begin(), con.it(3), con.end()); |
| for(int i = 0; i < 3; ++i) |
| VERIFY( array[i].val < 3 ); |
| for(int i = 4; i < 7; ++i) |
| VERIFY( array[i].val > 3 ); |
| for(int i = 0; i < 7; ++i) |
| VERIFY( array[i].valid ); |
| } |
| |
| void |
| test2() |
| { |
| bool test __attribute__((unused)) = true; |
| |
| int intarray[] = {0, 6, 1, 5, 2, 4, 3}; |
| rvalstruct array[7]; |
| std::copy(intarray, intarray + 7, array); |
| Container con(array,array + 7); |
| nth_element(con.begin(), con.it(3), con.end()); |
| for(int i = 0; i < 3; ++i) |
| VERIFY( array[i].val < 3 ); |
| for(int i = 4; i < 7; ++i) |
| VERIFY( array[i].val > 3 ); |
| for(int i = 0; i < 7; ++i) |
| VERIFY( array[i].valid ); |
| } |
| |
| bool |
| are_less(const rvalstruct& lhs, const rvalstruct& rhs) |
| { return lhs < rhs; } |
| |
| void |
| test3() |
| { |
| bool test __attribute__((unused)) = true; |
| |
| int intarray[] = {0, 6, 1, 5, 2, 4, 3}; |
| rvalstruct array[7]; |
| std::copy(intarray, intarray + 7, array); |
| Container con(array,array + 7); |
| nth_element(con.begin(), con.it(3), con.end(), are_less); |
| for(int i = 0; i < 3; ++i) |
| VERIFY( array[i].val < 3 ); |
| for(int i = 4; i < 7; ++i) |
| VERIFY( array[i].val > 3 ); |
| for(int i = 0; i < 7; ++i) |
| VERIFY( array[i].valid ); |
| } |
| |
| int |
| main() |
| { |
| test1(); |
| test2(); |
| test3(); |
| return 0; |
| } |