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// { dg-options "-std=gnu++11" }
// Copyright (C) 2005-2015 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;
}
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