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// { dg-options "-std=gnu++0x" }

// 2011-01-13  Paolo Carlini  <paolo.carlini@oracle.com>

//

// Copyright (C) 2011 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/>.

// 25.2.12 [alg.is_permutation] Is permutation

#include <algorithm>

#include <functional>

#include <testsuite_hooks.h>

struct my_equal_to

{

  bool

  operator()(int __x, int __y) const

  { return __x % 10 == __y % 10; }

};

const int arr0[] = { 11, 22, 33, 44, 55 };

void

do_test(int arr1[5], bool np = true)

{

  bool test __attribute__((unused)) = true;

  do

    VERIFY( std::is_permutation(arr1, arr1 + 5, arr0) == np );

  while (std::next_permutation(arr1, arr1 + 5));

}

template<typename Predicate>

  void

  do_test(int arr1[5], Predicate pred, bool np = true)

  {

    bool test __attribute__((unused)) = true;

    do

      VERIFY( std::is_permutation(arr1, arr1 + 5, arr0, pred) == np );

    while (std::next_permutation(arr1, arr1 + 5));

  }

void test01()

{

  int arr1[] = { 11, 22, 33, 44, 55 };

  do_test(arr1);

  int arr2[] = { 11, 33, 33, 44, 55 };

  do_test(arr2, false);

  int arr3[] = { 33, 33, 33, 44, 44 };

  do_test(arr3, false);

  int arr4[] = { 11, 22, 33, 44, 55 };

  do_test(arr4, std::equal_to<int>());

  int arr5[] = { 11, 33, 33, 44, 55 };

  do_test(arr5, std::equal_to<int>(), false);

  int arr6[] = { 33, 33, 33, 44, 44 };

  do_test(arr6, std::equal_to<int>(), false);

  int arr7[] = { 1, 2, 3, 4, 5 };

  do_test(arr7, my_equal_to());

  int arr8[] = { 1, 3, 3, 4, 5 };

  do_test(arr8, my_equal_to(), false);

  int arr9[] = { 3, 3, 3, 4, 4 };

  do_test(arr9, my_equal_to(), false);

  int arr10[] = { 111, 222, 333, 444, 555 };

  do_test(arr10, my_equal_to());

  int arr11[] = { 1, 222, 33, 4, 55 };

  do_test(arr11, my_equal_to());

  int arr12[] = { 111, 333, 333, 444, 555 };

  do_test(arr12, my_equal_to(), false);

  int arr13[] = { 333, 333, 333, 444, 444 };

  do_test(arr13, my_equal_to(), false);

}

int main()

{

  test01();

  return 0;

}